UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
 

FORM N-CSR 

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 

Investment Company Act file number811-09645 

Columbia Funds Series Trust 

(Exact name of registrant as specified in charter) 

225 Franklin Street 

Boston, Massachusetts 02110

(Address of principal executive offices) (Zip code)
 

  

Christopher O. Petersen, Esq. 

c/o Columbia Management Investment Advisers, LLC 

225 Franklin Street 

Boston, Massachusetts 02110 

  

Ryan C. Larrenaga, Esq. 

c/o Columbia Management Investment Advisers, LLC 

225 Franklin Street 

Boston, MA 02110 


(Name and address of agent for service) 

Registrant's telephone number, including area code:   (800) 345-6611 

Date of fiscal year end:  February 29 

Date of reporting period:  February 29, 2020 

Form N-CSR is to be used by management investment companies to file reports with the Commission not later than 10 days after the transmission to stockholders of any report that is required to be transmitted to stockholders under Rule 30e-1 under the Investment Company Act of 1940 (17 CFR 270.30e-1). The Commission may use the information provided on Form N-CSR in its regulatory, disclosure review, inspection, and policymaking roles. 

A registrant is required to disclose the information specified by Form N-CSR, and the Commission will make this information public. A registrant is not required to respond to the collection of information contained in Form N-CSR unless the Form displays a currently valid Office of Management and Budget ("OMB") control number. Please direct comments concerning the accuracy of the information collection burden estimate and any suggestions for reducing the burden to Secretary, Securities and Exchange Commission, 100 F Street, NE, Washington, DC 20549. The OMB has reviewed this collection of information under the clearance requirements of 44 U.S.C. § 3507. 

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

  

Item 1. Reports to Stockholders. 

Annual Report
February 29, 2020
Columbia Overseas Value Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Overseas Value Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Overseas Value Fund  |  Annual Report 2020

Table of Contents
Fund at a Glance
Investment objective
The Fund seeks long-term capital appreciation.
Portfolio management
Fred Copper, CFA
Co-Portfolio Manager
Managed Fund since 2008
Daisuke Nomoto, CMA (SAAJ)
Co-Portfolio Manager
Managed Fund since 2013
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A* Excluding sales charges 02/28/13 -4.10 2.58 4.66
  Including sales charges   -9.58 1.37 4.03
Advisor Class* 07/01/15 -3.78 2.84 5.02
Class C* Excluding sales charges 02/28/13 -4.81 1.82 3.88
  Including sales charges   -5.73 1.82 3.88
Institutional Class 03/31/08 -3.76 2.83 5.01
Institutional 2 Class* 07/01/15 -3.68 2.96 5.08
Institutional 3 Class* 07/01/15 -3.65 3.03 5.11
Class R* 03/01/16 -4.30 2.33 4.51
MSCI EAFE Value Index (Net)   -6.61 -0.40 3.20
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The MSCI EAFE Value Index (Net) is a subset of the MSCI EAFE Index (Net), and constituents of the index include securities from Europe, Australasia and the Far East. The index generally represents approximately 50% of the free float-adjusted market capitalization of the MSCI EAFE Index (Net), and consists of those securities classified by MSCI Inc. as most representing the value style, such as, higher book value-to-price ratios, higher forward earnings-to-price ratios, higher dividend yields and lower forecasted growth rates than securities representing the growth style.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes (except the MSCI EAFE Value Index (Net), which reflects reinvested dividends net of withholding taxes) or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Overseas Value Fund  | Annual Report 2020
3

Table of Contents
Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Overseas Value Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 5.9
Consumer Discretionary 7.9
Consumer Staples 11.1
Energy 11.6
Financials 26.8
Health Care 10.0
Industrials 12.5
Information Technology 3.0
Materials 6.6
Real Estate 1.5
Utilities 3.1
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
4 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Fund at a Glance   (continued)
Country breakdown (%) (at February 29, 2020)
Australia 2.4
Austria 1.3
Canada 4.8
China 0.7
Finland 1.9
France 11.4
Germany 7.6
Hong Kong 1.8
Ireland 0.1
Israel 2.4
Italy 0.4
Japan 22.6
Netherlands 8.3
Norway 1.8
Pakistan 0.6
Portugal 0.0(a)
Russian Federation 0.6
Singapore 1.8
South Korea 1.0
Spain 3.5
Sweden 0.4
Switzerland 0.5
United Kingdom 17.8
United States(b) 6.3
Total 100.0
    
(a) Rounds to zero.
(b) Includes investments in Money Market Funds and Exchange-Traded Funds.
Country breakdown is based primarily on issuer’s place of organization/incorporation. Percentages indicated are based upon total investments including options purchased and excluding all other investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Columbia Overseas Value Fund  | Annual Report 2020
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Table of Contents
Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned -4.10% excluding sales charges, outperforming its benchmark, the MSCI EAFE Value Index (Net), which returned -6.61%. The Fund’s security selection was the principal driver of performance, while sector and country allocation detracted modestly.
Surprising financial market resilience, then a global shock
Until the last two weeks of the 12-month period that ended February 29, 2020, markets performed surprisingly strongly. Global stocks were resilient despite a number of shocks that threatened to disrupt the global economy, in particular the ongoing trade war between the United States and China, the world’s two largest economies. Reflecting trade tensions, global manufacturing indices (PMIs) steadily declined over most of the period. Other challenging events included the Brexit (the U.K.’s departure from the European Union) standoff, severe political tensions in Hong Kong, and the attack on Saudi Arabia’s largest oil refinery. However, toward the end of the period, economic and political reverberations from the coronavirus outbreak spurred a wave of selling within equity markets.
Over the 12-month period, a gradual deceleration in economic growth caused global central banks’ monetary policies to remain extremely accommodative, supporting for a time the returns of fixed-income assets, as well as equities. Short-term interest rates declined worldwide, while in the United States volatility within the money markets induced the U.S. Federal Reserve to expand its balance sheet in order to preserve liquidity.
The coronavirus outbreak in early 2020 was a seminal and extremely disruptive event for financial markets and investors. A localized outbreak in the Hubei province in China metastasized into a global pandemic that has caused a significant percentage of the world’s population to shelter in place, creating both a supply shock as global supply chains are interrupted, as well as a demand shock as individuals have avoided travel and major events, and have curtailed many forms of economic engagement.
Industry allocation and security selection
During the period, the Fund’s sector weighting decisions detracted modestly from relative return, in particular from an overweight to the energy sector and an underweight to the utilities sector. The Fund’s country weightings detracted somewhat, driven by an overweight to the Netherlands. However, as is typical for the Fund, relative performance was largely driven by stock selection. In terms of individual holdings, the Fund’s position in BW LPG, a Singapore-based shipping company, performed strongly as previously depressed freight rates improved. Elsewhere, holdings in Yamana Gold, Inc. boosted performance as the Canadian metals producer benefited from a rally in gold prices. Lastly, the Fund’s position in Japanese import/export firm ITOCHU Corp. posted gains driven by strong cash flows across the company’s various divisions. Conversely, holdings in Dutch financial firm ABN AMRO Bank NV detracted as the company’s results were hurt by declining interest rates, which squeezed the bank’s interest margins, and money laundering accusations weighed on the stock. In addition, a position in Liberty Global PLC, a pan-European cable television provider, was hurt by pricing competition and weak demand in some core markets. Finally, holdings in U.K.-based specialist insurer Just Group PLC weighed on returns as the company was hurt by falling interest rates and Brexit-related declines in property prices.
During the period, the Fund used forward foreign currency contracts to hedge currency exposure associated with Fund securities, to shift investment exposure from one currency to another, to shift U.S. dollar exposure to achieve a representative weighted mix of major currencies in the benchmark, and/or to adjust an underweight country exposure in the portfolio. The Fund used options contracts to help efficiently exit from particular positions, or to implement a particular tactical view on the overall market without having to trade in the Fund’s underlying securities. On a stand-alone basis, the use of these derivatives had a negative impact on Fund performance.
At period’s end
News regarding the coronavirus has dominated global capital markets given the impact that the pandemic is having on both aggregate supply and demand due to the restrictive policies that are required to stem the spread of the virus. Markets dislike uncertainty, and the unique characteristics of the virus have brought significant ambiguity regarding the severity and duration of the outbreak, and its impact on the global economy and markets. Until there is a consensus expectation regarding the ultimate impact from COVID-19, markets are likely to remain extremely volatile. However, monetary conditions were very stimulative globally prior to the outbreak, and there has been tremendous momentum to support individual economies and
6 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Manager Discussion of Fund Performance  (continued)
capital markets on a country-by-country basis with an extraordinary quantity of stimulus. Once the focus turns to life after the coronavirus, we would expect a significant pickup in economic activity, as postponed demand is compressed into a catch-up period on a more durable basis, and as the monetary and fiscal stimulus currently accumulating in the system turbocharges economic activity.
At the close of the reporting period, the Fund was neutrally positioned after maintaining a defensive stance for most of 2018 and 2019 in response to expectations for decelerating economic activity. We look for an eventual market rotation into more cyclical stocks in anticipation of a resumption in economic growth.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Value securities may be unprofitable if the market fails to recognize their intrinsic worth or the portfolio manager misgauged that worth. International investing involves certain risks and volatility due to potential political, economic or currency instabilities and different financial and accounting standards. Risks are enhanced for emerging market issuers. Investing in derivatives is a specialized activity that involves special risks that subject the Fund to significant loss potential, including when used as leverage, and may result in greater fluctuation in Fund value. See the Fund’s prospectus for information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
Columbia Overseas Value Fund  | Annual Report 2020
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Table of Contents
Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,003.30 1,018.80 6.08 6.12 1.22
Advisor Class 1,000.00 1,000.00 1,005.30 1,020.04 4.84 4.87 0.97
Class C 1,000.00 1,000.00 999.80 1,015.07 9.80 9.87 1.97
Institutional Class 1,000.00 1,000.00 1,005.30 1,020.04 4.84 4.87 0.97
Institutional 2 Class 1,000.00 1,000.00 1,006.20 1,020.59 4.29 4.32 0.86
Institutional 3 Class 1,000.00 1,000.00 1,006.40 1,020.74 4.14 4.17 0.83
Class R 1,000.00 1,000.00 1,002.60 1,017.55 7.32 7.37 1.47
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
8 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 98.0%
Issuer Shares Value ($)
Australia 2.4%
Ansell Ltd. 1,055,466 20,647,754
BHP Group Ltd., ADR 289,271 12,528,327
National Australia Bank Ltd. 531,161 8,740,834
Total 41,916,915
Austria 1.3%
Andritz AG 667,955 23,637,379
Canada 4.8%
Alimentation Couche-Tard, Inc., Class B 574,318 17,440,269
Cameco Corp. 2,060,169 17,882,267
Stars Group, Inc. (The)(a) 830,396 19,029,973
Teck Resources Ltd., Class B 743,938 7,528,653
Teekay Tankers Ltd., Class A(a) 204,366 3,382,257
Yamana Gold, Inc. 5,127,126 19,585,621
Total 84,849,040
China 0.7%
Tencent Holdings Ltd. 230,500 11,687,435
Finland 1.9%
UPM-Kymmene OYJ 1,061,996 32,679,970
France 11.4%
AXA SA 1,932,180 44,912,250
BNP Paribas SA 732,983 35,579,227
Capgemini SE 204,777 22,692,827
DBV Technologies SA, ADR(a) 279,080 2,732,193
Eiffage SA 116,816 12,495,786
Sanofi 315,753 29,448,967
Total SA 1,209,773 52,289,263
Total 200,150,513
Germany 7.5%
Allianz SE, Registered Shares 76,096 16,577,508
Aroundtown SA 1,737,252 15,093,131
Bayer AG, Registered Shares 238,373 17,335,930
Covestro AG 611,446 23,692,048
Duerr AG 697,951 22,137,580
E.ON SE 2,008,781 23,334,530
Common Stocks (continued)
Issuer Shares Value ($)
KION Group AG 261,883 14,163,523
Total 132,334,250
Hong Kong 1.8%
WH Group Ltd. 29,510,000 30,968,131
Ireland 0.1%
Amarin Corp. PLC, ADR(a) 116,960 1,715,803
Israel 2.4%
Bank Hapoalim BM 4,176,552 32,493,995
Bezeq Israeli Telecommunication Corp., Ltd.(a) 12,317,855 8,983,276
Total 41,477,271
Italy 0.4%
Esprinet SpA 1,142,413 6,244,618
Japan 22.6%
CYBERDYNE, Inc.(a) 117,300 473,484
Dai-ichi Life Holdings, Inc. 1,023,100 13,875,640
Invincible Investment Corp. 25,552 10,339,997
ITOCHU Corp. 1,789,400 40,550,302
Kinden Corp. 1,009,100 15,235,380
Koito Manufacturing Co., Ltd. 252,700 9,899,449
Matsumotokiyoshi Holdings Co., Ltd. 780,700 25,632,691
Mitsubishi UFJ Financial Group, Inc. 4,207,300 20,556,698
Nihon M&A Center, Inc. 105,300 3,243,817
Nippon Telegraph & Telephone Corp. 1,754,900 40,941,416
ORIX Corp. 2,529,000 40,990,269
Ricoh Co., Ltd. 1,582,500 14,778,170
Shionogi & Co., Ltd. 324,000 17,440,931
Ship Healthcare Holdings, Inc. 334,100 13,460,939
Sony Corp. 412,400 25,423,586
Starts Corp., Inc. 252,800 5,209,282
Subaru Corp. 755,400 18,283,236
Sumitomo Mitsui Financial Group, Inc. 184,900 5,866,842
Takeda Pharmaceutical Co., Ltd. 1,155,700 39,910,459
Takuma Co., Ltd. 873,645 9,498,393
Toyota Motor Corp. 373,400 24,519,206
Total 396,130,187
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Overseas Value Fund  | Annual Report 2020
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Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Netherlands 8.3%
ABN AMRO Bank NV 1,830,164 25,101,325
ASR Nederland NV 950,387 31,982,618
ING Groep NV 4,111,241 39,368,592
Koninklijke Ahold Delhaize NV 846,278 19,770,983
Signify NV 982,139 29,264,285
Total 145,487,803
Norway 1.8%
BW LPG Ltd. 1,927,674 12,033,310
Kongsberg Automotive ASA(a) 2,888,319 1,321,874
Leroy Seafood Group ASA 3,047,196 18,774,228
Total 32,129,412
Pakistan 0.6%
DG Khan Cement Co., Ltd. 9,133,400 4,089,362
Lucky Cement Ltd. 1,790,650 5,697,767
Total 9,787,129
Portugal 0.0%
Banco Espirito Santo SA, Registered Shares(a),(b),(c) 3,582,817 4
Russian Federation 0.6%
Sberbank of Russia PJSC, ADR 728,098 10,388,983
Singapore 1.8%
DBS Group Holdings Ltd. 1,780,300 31,127,149
South Korea 1.0%
GS Home Shopping, Inc. 20,751 2,130,312
Hyundai Home Shopping Network Corp. 100,321 6,111,562
Youngone Corp. 357,173 9,374,775
Total 17,616,649
Spain 3.5%
ACS Actividades de Construccion y Servicios SA 519,103 15,478,854
Banco Santander SA 1,746,385 6,455,267
Endesa SA 1,148,477 29,552,616
Tecnicas Reunidas SA(a) 415,721 9,399,875
Total 60,886,612
Sweden 0.4%
Granges AB 810,909 6,538,831
Switzerland 0.5%
Novartis AG, Registered Shares 106,910 8,993,617
Common Stocks (continued)
Issuer Shares Value ($)
United Kingdom 17.8%
Barclays Bank PLC 7,304,963 13,999,905
BP PLC 6,347,334 32,978,255
British American Tobacco PLC 1,126,299 44,533,026
BT Group PLC 8,110,392 14,878,661
Crest Nicholson Holdings PLC 1,331,823 7,767,308
DCC PLC 404,644 28,981,841
GW Pharmaceuticals PLC, ADR(a) 38,201 3,908,344
HSBC Holdings PLC 1,982,418 13,389,737
Inchcape PLC 893,706 6,680,392
John Wood Group PLC 1,807,404 8,666,951
Just Group PLC(a) 22,156,475 20,624,152
Legal & General Group PLC 4,262,539 14,440,948
Micro Focus International PLC 855,269 8,145,340
Royal Dutch Shell PLC, Class B 2,884,298 62,517,845
TP ICAP PLC 4,755,387 22,436,654
WPP PLC 896,252 8,611,247
Total 312,560,606
United States 4.4%
Aerie Pharmaceuticals, Inc.(a) 162,749 2,848,107
Alexion Pharmaceuticals, Inc.(a) 35,464 3,334,680
Burford Capital Ltd. 1,585,567 11,249,595
Insmed, Inc.(a) 121,314 3,020,719
Liberty Global PLC, Class C(a) 862,925 16,041,776
Primo Water Corp. 2,377,780 33,883,365
Quotient Ltd.(a) 746,481 4,538,604
Sage Therapeutics, Inc.(a) 49,617 2,331,999
Total 77,248,845
Total Common Stocks
(Cost $1,909,883,833)
1,716,557,152
Exchange-Traded Equity Funds 1.0%
  Shares Value ($)
United States 1.0%
iShares MSCI EAFE ETF 280,582 17,463,423
Total Exchange-Traded Equity Funds
(Cost $18,894,251)
17,463,423
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Options Purchased Puts 0.0%
          Value ($)
(Cost $778,033) 867,680
    
Money Market Funds 0.9%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(d),(e) 15,491,357 15,491,357
Total Money Market Funds
(Cost $15,490,644)
15,491,357
Total Investments in Securities
(Cost $1,945,046,761)
1,750,379,612
Other Assets & Liabilities, Net   1,698,063
Net Assets $1,752,077,675
Investments in derivatives
Forward foreign currency exchange contracts
Currency to
be sold
Currency to
be purchased
Counterparty Settlement
date
Unrealized
appreciation ($)
Unrealized
depreciation ($)
87,463,000 CAD 66,225,080 USD Goldman Sachs 03/26/2020 1,061,737
114,268,000 ILS 33,192,355 USD Goldman Sachs 03/26/2020 207,740
3,603,100,000 JPY 33,129,212 USD Goldman Sachs 03/26/2020 (320,069)
20,671,007,000 KRW 17,523,000 USD Goldman Sachs 03/26/2020 356,142
142,872,000 NOK 15,578,300 USD Goldman Sachs 03/26/2020 391,360
78,109,315 USD 115,560,000 AUD Goldman Sachs 03/26/2020 (2,785,224)
27,328,386 USD 26,514,000 CHF Goldman Sachs 03/26/2020 200,013
27,291,738 USD 261,927,000 SEK Goldman Sachs 03/26/2020 (2,381)
Total       2,216,992 (3,107,674)
    
Put option contracts purchased
Description Counterparty Trading
currency
Notional
amount
Number of
contracts
Exercise
price/Rate
Expiration
date
Cost ($) Value ($)
CBOE Volatility Index JPMorgan USD 6,000,456 1,496 30.00 03/18/2020 778,033 867,680
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At February 29, 2020, the total value of these securities amounted to $4, which represents less than 0.01% of total net assets.
(c) Valuation based on significant unobservable inputs.
(d) The rate shown is the seven-day current annualized yield at February 29, 2020.
(e) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  9,754,825 355,228,794 (349,492,262) 15,491,357 (1,553) 713 238,200 15,491,357
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Overseas Value Fund  | Annual Report 2020
11

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Abbreviation Legend
ADR American Depositary Receipt
Currency Legend
AUD Australian Dollar
CAD Canada Dollar
CHF Swiss Franc
ILS Israeli Shekel
JPY Japanese Yen
KRW South Korean Won
NOK Norwegian Krone
SEK Swedish Krona
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Foreign equity securities actively traded in markets where there is a significant delay in the local close relative to the New York Stock Exchange are classified as Level 2. The values of these securities may include an adjustment to reflect the impact of market movements following the close of local trading, as described in Note 2 to the financial statements – Security valuation.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Australia 12,528,327 29,388,588 41,916,915
Austria 23,637,379 23,637,379
Canada 84,849,040 84,849,040
China 11,687,435 11,687,435
Finland 32,679,970 32,679,970
France 2,732,193 197,418,320 200,150,513
Germany 132,334,250 132,334,250
Hong Kong 30,968,131 30,968,131
Ireland 1,715,803 1,715,803
Israel 41,477,271 41,477,271
Italy 6,244,618 6,244,618
Japan 396,130,187 396,130,187
Netherlands 145,487,803 145,487,803
Norway 32,129,412 32,129,412
Pakistan 9,787,129 9,787,129
Portugal 4 4
Russian Federation 10,388,983 10,388,983
Singapore 31,127,149 31,127,149
South Korea 17,616,649 17,616,649
Spain 60,886,612 60,886,612
Sweden 6,538,831 6,538,831
Switzerland 8,993,617 8,993,617
United Kingdom 3,908,344 308,652,262 312,560,606
United States 65,999,250 11,249,595 77,248,845
Total Common Stocks 171,732,957 1,544,824,191 4 1,716,557,152
Exchange-Traded Equity Funds 17,463,423 17,463,423
Options Purchased Puts 867,680 867,680
Money Market Funds 15,491,357 15,491,357
Total Investments in Securities 205,555,417 1,544,824,191 4 1,750,379,612
Investments in Derivatives        
Asset        
Forward Foreign Currency Exchange Contracts 2,216,992 2,216,992
Liability        
Forward Foreign Currency Exchange Contracts (3,107,674) (3,107,674)
Total 205,555,417 1,543,933,509 4 1,749,488,930
See the Portfolio of Investments for all investment classifications not indicated in the table.
The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets. These assets include certain foreign securities for which a third party statistical pricing service may be employed for purposes of fair market valuation. The model utilized by such third party statistical pricing service takes into account a security’s correlation to available market data including, but not limited to, intraday index, ADR, and exchange-traded fund movements.
Forward foreign currency exchange contracts are valued at unrealized appreciation (depreciation).
The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Overseas Value Fund  | Annual Report 2020
13

Table of Contents
Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $1,928,778,084) $1,734,020,575
Affiliated issuers (cost $15,490,644) 15,491,357
Options purchased (cost $778,033) 867,680
Cash 512,917
Unrealized appreciation on forward foreign currency exchange contracts 2,216,992
Receivable for:  
Investments sold 1,742,870
Capital shares sold 4,614,739
Dividends 3,866,782
Foreign tax reclaims 1,221,546
Expense reimbursement due from Investment Manager 598
Prepaid expenses 3,518
Total assets 1,764,559,574
Liabilities  
Unrealized depreciation on forward foreign currency exchange contracts 3,107,674
Payable for:  
Investments purchased 5,347,664
Capital shares purchased 3,388,958
Management services fees 38,700
Distribution and/or service fees 3,017
Transfer agent fees 157,847
Compensation of board members 216,167
Other expenses 221,872
Total liabilities 12,481,899
Net assets applicable to outstanding capital stock $1,752,077,675
Represented by  
Paid in capital 2,228,994,307
Total distributable earnings (loss) (476,916,632)
Total - representing net assets applicable to outstanding capital stock $1,752,077,675
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Statement of Assets and Liabilities  (continued)
February 29, 2020
Class A  
Net assets $309,065,454
Shares outstanding 36,130,850
Net asset value per share $8.55
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $9.07
Advisor Class  
Net assets $210,152,421
Shares outstanding 24,633,572
Net asset value per share $8.53
Class C  
Net assets $28,608,223
Shares outstanding 3,365,165
Net asset value per share $8.50
Institutional Class  
Net assets $443,216,959
Shares outstanding 51,734,219
Net asset value per share $8.57
Institutional 2 Class  
Net assets $493,226,061
Shares outstanding 57,910,737
Net asset value per share $8.52
Institutional 3 Class  
Net assets $260,599,185
Shares outstanding 30,560,398
Net asset value per share $8.53
Class R  
Net assets $7,209,372
Shares outstanding 864,277
Net asset value per share $8.34
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Overseas Value Fund  | Annual Report 2020
15

Table of Contents
Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $69,819,509
Dividends — affiliated issuers 238,200
Foreign taxes withheld (5,821,920)
Total income 64,235,789
Expenses:  
Management services fees 14,663,603
Distribution and/or service fees  
Class A 839,005
Class C 355,560
Class R 34,672
Transfer agent fees  
Class A 490,387
Advisor Class 279,188
Class C 51,971
Institutional Class 675,091
Institutional 2 Class 303,293
Institutional 3 Class 22,769
Class R 10,129
Compensation of board members 60,353
Custodian fees 272,520
Printing and postage fees 136,259
Registration fees 168,890
Audit fees 42,782
Legal fees 24,242
Interest on collateral 2,946
Compensation of chief compliance officer 386
Other 52,488
Total expenses 18,486,534
Fees waived or expenses reimbursed by Investment Manager and its affiliates (464,931)
Fees waived by transfer agent  
Institutional 2 Class (89,926)
Expense reduction (382)
Total net expenses 17,931,295
Net investment income 46,304,494
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 37,737,449
Investments — affiliated issuers (1,553)
Foreign currency translations 34,346
Forward foreign currency exchange contracts (6,607,559)
Options purchased (4,145,582)
Options contracts written 318,428
Net realized gain 27,335,529
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (144,874,731)
Investments — affiliated issuers 713
Foreign currency translations (100,392)
Forward foreign currency exchange contracts 839,915
Options purchased 608,884
Options contracts written 249
Net change in unrealized appreciation (depreciation) (143,525,362)
Net realized and unrealized loss (116,189,833)
Net decrease in net assets resulting from operations $(69,885,339)
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $46,304,494 $40,968,366(a)
Net realized gain 27,335,529 8,276,974(a)
Net change in unrealized appreciation (depreciation) (143,525,362) (137,012,216)(a)
Net decrease in net assets resulting from operations (69,885,339) (87,766,876)
Distributions to shareholders    
Net investment income and net realized gains    
Class A (12,173,862) (11,129,073)
Advisor Class (8,445,439) (4,877,227)
Class C (1,005,856) (1,101,771)
Institutional Class (18,507,512) (13,232,351)
Institutional 2 Class (21,627,056) (11,949,202)
Institutional 3 Class (10,936,273) (7,891,502)
Class R (257,575) (129,052)
Class T (12,607)
Total distributions to shareholders (72,953,573) (50,322,785)
Increase in net assets from capital stock activity 130,646,357 691,732,292
Total increase (decrease) in net assets (12,192,555) 553,642,631
Net assets at beginning of year 1,764,270,230 1,210,627,599
Net assets at end of year $1,752,077,675 $1,764,270,230
    
(a) Amounts for the year ended February 28, 2019, as disclosed in the prior financial statements, have been corrected, see Note 10 to the Notes to Financial Statements.
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Overseas Value Fund  | Annual Report 2020
17

Table of Contents
Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 6,127,924 57,347,219 10,252,736 100,421,639
Distributions reinvested 1,209,112 11,700,791 1,167,990 10,628,368
Redemptions (8,137,467) (75,738,653) (9,579,912) (90,346,038)
Net increase (decrease) (800,431) (6,690,643) 1,840,814 20,703,969
Advisor Class        
Subscriptions 14,289,588 131,823,892 16,608,652 158,458,810
Distributions reinvested 875,678 8,444,871 549,056 4,875,876
Redemptions (8,022,754) (74,168,783) (7,267,321) (64,550,993)
Net increase 7,142,512 66,099,980 9,890,387 98,783,693
Class C        
Subscriptions 559,233 5,214,228 2,382,707 23,294,142
Distributions reinvested 101,570 978,120 116,574 1,079,628
Redemptions (1,880,320) (17,293,672) (2,239,354) (21,194,842)
Net increase (decrease) (1,219,517) (11,101,324) 259,927 3,178,928
Institutional Class        
Subscriptions 22,205,355 206,972,718 37,501,046 356,509,812
Distributions reinvested 1,852,312 17,935,604 1,404,912 12,660,249
Redemptions (19,028,873) (177,456,130) (22,037,346) (203,937,393)
Net increase 5,028,794 47,452,192 16,868,612 165,232,668
Institutional 2 Class        
Subscriptions 12,158,615 112,681,798 58,444,628 534,350,296
Distributions reinvested 2,247,844 21,625,580 1,395,264 11,881,874
Redemptions (14,502,449) (134,453,160) (8,493,058) (76,627,116)
Net increase (decrease) (95,990) (145,782) 51,346,834 469,605,054
Institutional 3 Class        
Subscriptions 9,283,296 85,767,709 11,498,746 110,803,219
Distributions reinvested 1,135,561 10,936,162 881,444 7,891,406
Redemptions (6,815,245) (63,661,555) (18,347,804) (186,649,689)
Net increase (decrease) 3,603,612 33,042,316 (5,967,614) (67,955,064)
Class K        
Redemptions (14,117) (147,944)
Net decrease (14,117) (147,944)
Class R        
Subscriptions 448,384 4,084,889 452,712 4,200,572
Distributions reinvested 24,432 230,639 12,449 109,035
Redemptions (258,643) (2,325,910) (121,077) (1,105,947)
Net increase 214,173 1,989,618 344,084 3,203,660
Class T        
Distributions reinvested 1,259 12,568
Redemptions (99,744) (885,240)
Net decrease (98,485) (872,672)
Total net increase 13,873,153 130,646,357 74,470,442 691,732,292
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Overseas Value Fund  | Annual Report 2020

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Columbia Overseas Value Fund  | Annual Report 2020
19

Table of Contents
Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $9.24 0.22 (0.56) (0.34) (0.33) (0.02) (0.35)
Year Ended 2/28/2019 $10.37 0.27(e) (1.10)(e) (0.83) (0.13) (0.17) (0.30)
Year Ended 2/28/2018 $8.52 0.14 2.04 2.18 (0.15) (0.18) (0.33)
Year Ended 2/28/2017 $7.46 0.17 1.04 1.21 (0.15) (0.15)
Year Ended 2/29/2016 $8.65 0.16 (1.18) (1.02) (0.17) (0.17)
Advisor Class
Year Ended 2/29/2020 $9.21 0.22 (0.52) (0.30) (0.36) (0.02) (0.38)
Year Ended 2/28/2019 $10.35 0.28(e) (1.10)(e) (0.82) (0.15) (0.17) (0.32)
Year Ended 2/28/2018 $8.49 0.15 2.06 2.21 (0.17) (0.18) (0.35)
Year Ended 2/28/2017 $7.43 0.12 1.10 1.22 (0.16) (0.16)
Year Ended 2/29/2016(i) $8.78 0.01 (1.17) (1.16) (0.19) (0.19)
Class C
Year Ended 2/29/2020 $9.20 0.16 (0.57) (0.41) (0.27) (0.02) (0.29)
Year Ended 2/28/2019 $10.31 0.20(e) (1.09)(e) (0.89) (0.05) (0.17) (0.22)
Year Ended 2/28/2018 $8.48 0.06 2.04 2.10 (0.09) (0.18) (0.27)
Year Ended 2/28/2017 $7.44 0.06 1.08 1.14 (0.10) (0.10)
Year Ended 2/29/2016 $8.64 0.09 (1.17) (1.08) (0.12) (0.12)
Institutional Class
Year Ended 2/29/2020 $9.25 0.24 (0.54) (0.30) (0.36) (0.02) (0.38)
Year Ended 2/28/2019 $10.38 0.29(e) (1.10)(e) (0.81) (0.15) (0.17) (0.32)
Year Ended 2/28/2018 $8.53 0.15 2.05 2.20 (0.17) (0.18) (0.35)
Year Ended 2/28/2017 $7.46 0.12 1.11 1.23 (0.16) (0.16)
Year Ended 2/29/2016 $8.66 0.10 (1.11) (1.01) (0.19) (0.19)
Institutional 2 Class
Year Ended 2/29/2020 $9.20 0.25 (0.54) (0.29) (0.37) (0.02) (0.39)
Year Ended 2/28/2019 $10.33 0.30(e) (1.10)(e) (0.80) (0.16) (0.17) (0.33)
Year Ended 2/28/2018 $8.48 0.18 2.03 2.21 (0.18) (0.18) (0.36)
Year Ended 2/28/2017 $7.42 0.15 1.09 1.24 (0.18) (0.18)
Year Ended 2/29/2016(k) $8.78 0.02 (1.18) (1.16) (0.20) (0.20)
Institutional 3 Class
Year Ended 2/29/2020 $9.21 0.25 (0.54) (0.29) (0.37) (0.02) (0.39)
Year Ended 2/28/2019 $10.35 0.30(e) (1.10)(e) (0.80) (0.17) (0.17) (0.34)
Year Ended 2/28/2018 $8.49 0.21 2.02 2.23 (0.19) (0.18) (0.37)
Year Ended 2/28/2017 $7.42 0.07 1.18 1.25 (0.18) (0.18)
Year Ended 2/29/2016(l) $8.78 0.07 (1.22) (1.15) (0.21) (0.21)
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $8.55 (4.10%) 1.24%(c) 1.22%(c),(d) 2.35% 35% $309,065
Year Ended 2/28/2019 $9.24 (7.96%) 1.29%(c),(f) 1.25%(c),(d),(f) 2.80%(e) 58% $341,198
Year Ended 2/28/2018 $10.37 25.72% 1.36%(g) 1.36%(d),(g) 1.41% 47% $363,817
Year Ended 2/28/2017 $8.52 16.25% 1.45%(h) 1.45%(h) 2.13% 89% $243,879
Year Ended 2/29/2016 $7.46 (11.95%) 1.44% 1.44%(d) 1.93% 68% $171,630
Advisor Class
Year Ended 2/29/2020 $8.53 (3.78%) 0.99%(c) 0.97%(c),(d) 2.41% 35% $210,152
Year Ended 2/28/2019 $9.21 (7.80%) 1.04%(c),(f) 0.99%(c),(d),(f) 2.96%(e) 58% $161,150
Year Ended 2/28/2018 $10.35 26.18% 1.11%(g) 1.10%(d),(g) 1.47% 47% $78,634
Year Ended 2/28/2017 $8.49 16.55% 1.20%(h) 1.20%(h) 1.48% 89% $23,666
Year Ended 2/29/2016(i) $7.43 (13.43%) 1.23%(j) 1.21%(d),(j) 0.22%(j) 68% $1,425
Class C
Year Ended 2/29/2020 $8.50 (4.81%) 1.99%(c) 1.97%(c),(d) 1.73% 35% $28,608
Year Ended 2/28/2019 $9.20 (8.60%) 2.04%(c),(f) 2.00%(c),(d),(f) 2.09%(e) 58% $42,165
Year Ended 2/28/2018 $10.31 24.87% 2.11%(g) 2.10%(d),(g) 0.61% 47% $44,594
Year Ended 2/28/2017 $8.48 15.32% 2.20%(h) 2.20%(h) 0.80% 89% $20,829
Year Ended 2/29/2016 $7.44 (12.66%) 2.19% 2.19%(d) 1.08% 68% $5,345
Institutional Class
Year Ended 2/29/2020 $8.57 (3.76%) 0.99%(c) 0.97%(c),(d) 2.54% 35% $443,217
Year Ended 2/28/2019 $9.25 (7.69%) 1.04%(c),(f) 1.00%(c),(d),(f) 3.05%(e) 58% $432,061
Year Ended 2/28/2018 $10.38 25.94% 1.11%(g) 1.10%(d),(g) 1.46% 47% $309,845
Year Ended 2/28/2017 $8.53 16.63% 1.20%(h) 1.20%(h) 1.52% 89% $57,964
Year Ended 2/29/2016 $7.46 (11.87%) 1.22% 1.20%(d) 1.25% 68% $3,660
Institutional 2 Class
Year Ended 2/29/2020 $8.52 (3.68%) 0.90%(c) 0.86%(c) 2.70% 35% $493,226
Year Ended 2/28/2019 $9.20 (7.61%) 0.96%(c),(f) 0.88%(c),(f) 3.39%(e) 58% $533,584
Year Ended 2/28/2018 $10.33 26.23% 0.99%(g) 0.98%(g) 1.82% 47% $68,822
Year Ended 2/28/2017 $8.48 16.79% 0.98%(h) 0.98%(h) 1.82% 89% $29,936
Year Ended 2/29/2016(k) $7.42 (13.41%) 1.04%(j) 1.04%(j) 0.45%(j) 68% $768
Institutional 3 Class
Year Ended 2/29/2020 $8.53 (3.65%) 0.85%(c) 0.83%(c) 2.67% 35% $260,599
Year Ended 2/28/2019 $9.21 (7.64%) 0.89%(c),(f) 0.85%(c),(f) 3.11%(e) 58% $248,248
Year Ended 2/28/2018 $10.35 26.37% 0.94%(g) 0.93%(g) 2.08% 47% $340,651
Year Ended 2/28/2017 $8.49 16.95% 0.95%(h) 0.95%(h) 0.85% 89% $13,916
Year Ended 2/29/2016(l) $7.42 (13.34%) 0.92%(j) 0.92%(j) 1.26%(j) 68% $2
The accompanying Notes to Financial Statements are an integral part of this statement.
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21

Table of Contents
Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class R
Year Ended 2/29/2020 $9.02 0.18 (0.53) (0.35) (0.31) (0.02) (0.33)
Year Ended 2/28/2019 $10.13 0.23(e) (1.07)(e) (0.84) (0.10) (0.17) (0.27)
Year Ended 2/28/2018 $8.33 0.08 2.03 2.11 (0.13) (0.18) (0.31)
Year Ended 2/28/2017(m) $7.46 0.06 0.94 1.00 (0.13) (0.13)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) Ratios include interest on collateral expense which is less than 0.01%.
(d) The benefits derived from expense reductions had an impact of less than 0.01%.
(e) Amounts for the year ended February 28, 2019, as disclosed in the prior financial statements, have been corrected, see Note 10 to the Notes to Financial Statements.
(f) Ratios include interfund lending expense which is less than 0.01%.
(g) Ratios include line of credit interest expense which is less than 0.01%.
(h) Expenses have been reduced due to a reimbursement of expenses overbilled by a third party. If the reimbursement had been excluded, the expense ratios would have been higher by the percentages shown for each class in the table below. All fee waivers and expense reimbursements by the Investment Manager and its affiliates were applied before giving effect to this third party reimbursement.
    
Year Ended Class A Advisor
Class
Class C Institutional
Class
Institutional 2
Class
Institutional 3
Class
Class R
02/28/2017 0.01% 0.02% 0.02% 0.02% 0.02% 0.03% 0.02%
    
(i) Advisor Class shares commenced operations on July 1, 2015. Per share data and total return reflect activity from that date.
(j) Annualized.
(k) Institutional 2 Class shares commenced operations on July 1, 2015. Per share data and total return reflect activity from that date.
(l) Institutional 3 Class shares commenced operations on July 1, 2015. Per share data and total return reflect activity from that date.
(m) Class R shares commenced operations on March 1, 2016. Per share data and total return reflect activity from that date.
The accompanying Notes to Financial Statements are an integral part of this statement.
22 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class R
Year Ended 2/29/2020 $8.34 (4.30%) 1.49%(c) 1.47%(c),(d) 2.00% 35% $7,209
Year Ended 2/28/2019 $9.02 (8.20%) 1.55%(c),(f) 1.49%(c),(d),(f) 2.47%(e) 58% $5,864
Year Ended 2/28/2018 $10.13 25.46% 1.61%(g) 1.59%(d),(g) 0.80% 47% $3,099
Year Ended 2/28/2017(m) $8.33 13.47% 1.70%(h),(j) 1.70%(h),(j) 0.72%(j) 89% $972
The accompanying Notes to Financial Statements are an integral part of this statement.
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23

Table of Contents
Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Overseas Value Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities and exchange-traded funds are valued at the close of business of the New York Stock Exchange. Equity securities and exchange-traded funds are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
24 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Forward foreign currency exchange contracts are marked-to-market based upon foreign currency exchange rates provided by a pricing service.
Option contracts are valued at the mean of the latest quoted bid and ask prices on their primary exchanges. Option contracts, including over-the-counter option contracts, with no readily available market quotations are valued using mid-market evaluations from independent third-party vendors.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Foreign currency transactions and translations
The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.
For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held
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25

Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Forward foreign currency exchange contracts
Forward foreign currency exchange contracts are over-the-counter agreements between two parties to buy and sell a currency at a set price on a future date. The Fund utilized forward foreign currency exchange contracts to hedge the currency exposure associated with some or all of the Fund’s securities, to shift investment exposure from one currency to another and to shift U.S. dollar exposure to achieve a representative weighted mix of major currencies in its benchmark. These instruments may be used for other purposes in future periods.
The values of forward foreign currency exchange contracts fluctuate daily with changes in foreign currency exchange rates. Changes in the value of these contracts are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund will realize a gain or loss when the forward foreign currency exchange contract is closed or expires. Non-deliverable forward foreign currency exchange contracts are settled with the counterparty in U.S. dollars without delivery of foreign currency.
26 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
The use of forward foreign currency exchange contracts does not eliminate fluctuations in the prices of the Fund’s portfolio securities. The risks of forward foreign currency exchange contracts include movement in the values of the foreign currencies relative to the U.S. dollar (or other foreign currencies) and the possibility that counterparties will not complete their contractual obligations, which may be in excess of the amount reflected, if any, in the Statement of Assets and Liabilities.
Options contracts
Options are contracts which entitle the holder to purchase or sell securities or other identified assets at a specified price, or in the case of index option contracts, to receive or pay the difference between the index value and the strike price of the index option contract. Option contracts can be either exchange-traded or over-the-counter. The Fund purchased and wrote option contracts to decrease the Fund’s exposure to equity market risk and to increase return on investments and to facilitate buying and selling of securities for investments. These instruments may be used for other purposes in future periods. Completion of transactions for option contracts traded in the over-the-counter market depends upon the performance of the other party. Cash collateral may be collected or posted by the Fund to secure certain over-the-counter option contract trades. Cash collateral held or posted by the Fund for such option contract trades must be returned to the broker or the Fund upon closure, exercise or expiration of the contract.
Options contracts purchased are recorded as investments. When the Fund writes an options contract, the premium received is recorded as an asset and an amount equivalent to the premium is recorded as a liability in the Statement of Assets and Liabilities and is subsequently adjusted to reflect the current fair value of the option written. Changes in the fair value of the written option are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund will realize a gain or loss when the option contract is closed or expires. When option contracts are exercised, the proceeds on sales for a written call or purchased put option contract, or the purchase cost for a written put or purchased call option contract, is adjusted by the amount of premium received or paid.
For over-the-counter options purchased, the Fund bears the risk of loss of the amount of the premiums paid plus the positive change in market values net of any collateral held by the Fund should the counterparty fail to perform under the contracts. Option contracts written by the Fund do not typically give rise to significant counterparty credit risk, as options written generally obligate the Fund and not the counterparty to perform. The risk in writing a call option contract is that the Fund gives up the opportunity for profit if the market price of the security increases above the strike price and the option contract is exercised. The risk in writing a put option contract is that the Fund may incur a loss if the market price of the security decreases below the strike price and the option contract is exercised. Exercise of a written option could result in the Fund purchasing or selling a security or foreign currency when it otherwise would not, or at a price different from the current market value. In purchasing and writing options, the Fund bears the risk of an unfavorable change in the value of the underlying instrument or the risk that the Fund may not be able to enter into a closing transaction due to an illiquid market.
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Asset derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Equity risk Investments, at value — Options Purchased 867,680
Foreign exchange risk Unrealized appreciation on forward foreign currency exchange contracts 2,216,992
Total   3,084,672
    
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27

Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Foreign exchange risk Unrealized depreciation on forward foreign currency exchange contracts 3,107,674
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category Forward
foreign
currency
exchange
contracts
($)
Options
contracts
written
($)
Options
contracts
purchased
($)
Total
($)
Equity risk 318,428 (4,145,582) (3,827,154)
Foreign exchange risk (6,607,559) (6,607,559)
Total (6,607,559) 318,428 (4,145,582) (10,434,713)
 
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category Forward
foreign
currency
exchange
contracts
($)
Options
contracts
written
($)
Options
contracts
purchased
($)
Total
($)
Equity risk 249 608,884 609,133
Foreign exchange risk 839,915 839,915
Total 839,915 249 608,884 1,449,048
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average
value ($)*
Options contracts — purchased 507,395
Options contracts — written (37,376)
    
Derivative instrument Average unrealized
appreciation ($)*
Average unrealized
depreciation ($)*
Forward foreign currency exchange contracts 1,480,205 (2,791,890)
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
28 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Offsetting of assets and liabilities
The following table presents the Fund’s gross and net amount of assets and liabilities available for offset under netting arrangements as well as any related collateral received or pledged by the Fund as of February 29, 2020:
  Goldman
Sachs ($)
JPMorgan ($) Total ($)
Assets      
Forward foreign currency exchange contracts 2,216,992 - 2,216,992
Options purchased puts - 867,680 867,680
Total assets 2,216,992 867,680 3,084,672
Liabilities      
Forward foreign currency exchange contracts 3,107,674 - 3,107,674
Total liabilities 3,107,674 - 3,107,674
Total financial and derivative net assets (890,682) 867,680 (23,002)
Total collateral received (pledged) (a) - - -
Net amount (b) (890,682) 867,680 (23,002)
    
(a) In some instances, the actual collateral received and/or pledged may be more than the amount shown due to overcollateralization.
(b) Represents the net amount due from/(to) counterparties in the event of default.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.87% to 0.67% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.80% of the Fund’s average daily net assets.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class. In addition, effective through June 30, 2020, Institutional 2 Class shares are subject to a contractual transfer agency fee annual limitation of not more than 0.04% of the average daily net assets attributable to Institutional 2 Class shares.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.15
Advisor Class 0.15
Class C 0.15
Institutional Class 0.15
Institutional 2 Class 0.04
Institutional 3 Class 0.01
Class R 0.15
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $382.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 219,406
Class C 1.00(b) 4,866
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  Fee rate(s) contractual
through
June 30, 2020
Class A 1.22%
Advisor Class 0.97
Class C 1.97
Institutional Class 0.97
Institutional 2 Class 0.86
Institutional 3 Class 0.83
Class R 1.47
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Reflected in the contractual cap commitment, effective through June 30, 2020, is the Transfer Agent’s contractual agreement to limit total transfer agency fees to an annual rate of not more than 0.04% for Institutional 2 Class of the average daily net assets attributable to Institutional 2 Class, unless sooner terminated at the sole discretion of the Board of Trustees. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
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Notes to Financial Statements  (continued)
February 29, 2020
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, late-year ordinary losses, capital loss carryforward, distribution reclassifications, foreign currency transactions, and passive foreign investment company (PFIC) holdings. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Excess of distributions
over net investment
income ($)
Accumulated
net realized
(loss) ($)
Paid in
capital ($)
4,904,801 (4,904,800) (1)
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
68,750,130 4,203,443 72,953,573 26,613,132 23,709,653 50,322,785
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
(depreciation) ($)
8,068,493 (277,650,518) (202,765,847)
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
(depreciation) ($)
1,952,254,777 88,329,114 (291,094,961) (202,765,847)
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
The following capital loss carryforwards, determined at February 29, 2020, may be available to reduce taxable income arising from future net realized gains on investments, if any, to the extent permitted by the Internal Revenue Code. Capital loss carryforwards with no expiration are required to be utilized prior to any capital losses which carry an expiration date. As a result of this ordering rule, capital loss carryforwards which carry an expiration date may be more likely to expire unused. In addition, for the year ended February 29, 2020, capital loss carryforwards utilized and expired unused, if any, were as follows:
No expiration
short-term ($)
No expiration
long-term ($)
Total ($) Utilized ($) Expired ($)
(277,650,518) (277,650,518) 2,780,919
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Under current tax rules, regulated investment companies can elect to treat certain late-year ordinary losses incurred and post-October capital losses (capital losses realized after October 31) as arising on the first day of the following taxable year. As of February 29, 2020, the Fund will elect to treat the following late-year ordinary losses and post-October capital losses as arising on March 1, 2020.
Late year
ordinary losses ($)
Post-October
capital losses ($)
4,291,732
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $709,165,027 and $622,238,239, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund did not borrow or lend money under the Interfund Program during the year ended February 29, 2020.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Derivatives risk
Losses involving derivative instruments may be substantial, because a relatively small movement in the underlying reference (which is generally the price, rate or other economic indicator associated with a security(ies), commodity, currency or index or other instrument or asset) may result in a substantial loss for the Fund. In addition to the potential for increased losses, the use of derivative instruments may lead to increased volatility within the Fund. Derivatives will typically increase the Fund’s exposure to principal risks to which it is otherwise exposed, and may expose the Fund to additional risks, including correlation risk, counterparty risk, hedging risk, leverage risk, liquidity risk and pricing risk.
Financial sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the financial services sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the financial services sector are subject to certain risks, including the risk of regulatory change, decreased liquidity in credit markets and unstable interest rates. Such companies may have concentrated portfolios, such as a high level of loans to real estate developers, which makes them vulnerable to economic conditions that affect that industry. Performance of such companies may be affected by competitive pressures and exposure to investments or agreements that, under certain circumstances, may lead to losses (e.g., subprime loans). Companies in the financial services sector are subject to extensive governmental regulation that may limit the amount and types of loans and other financial commitments they can make, and interest rates and fees that they may charge. In addition, profitability of such companies is largely dependent upon the availability and the cost of capital.
Foreign securities and emerging market countries risk
Investing in foreign securities may involve certain risks not typically associated with investing in U.S. securities, such as increased currency volatility and risks associated with political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, which may result in significant market volatility. In addition, certain foreign securities may not be as liquid as U.S. securities. Investing in emerging markets may increase these risks and expose the Fund to elevated risks associated with increased inflation, deflation or currency devaluation. To the extent that the Fund concentrates its investment exposure to any one or a few specific countries, the Fund will be particularly susceptible to the risks associated with the conditions, events or other factors impacting those countries or regions and may, therefore, have a greater risk than that of a fund that is more geographically diversified.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Shareholder concentration risk
At February 29, 2020, two unaffiliated shareholders of record owned 33.4% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 23.8% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10.  Revision of previously issued financial statements
During the preparation of the February 29, 2020 financial statements, it was determined that certain amounts reported in the February 28, 2019 financial statements for the Fund were incorrect due to an error in accounting for a corporate action, which resulted in an understatement of reported investment income and change in unrealized depreciation and an overstatement of realized gain during that year. Management evaluated the impact of the error to the current and prior year financial statements and determined that the previously issued financial statements were not materially misstated; however, it would not be appropriate to reflect the misclassification in the current year. Accordingly, management has revised the February 28, 2019 financial statements. As the 2019 financial statements are not presented herein, the revision has been reflected by revising applicable account balances or line items in the Statement of Changes in Net Assets and Financial Highlights for 2019 to correct the error. The result of the correction was an increase to investment income and change in unrealized depreciation and a decrease to realized gain for the year then ended and the resulting impact to the per share amounts and
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Table of Contents
Notes to Financial Statements  (continued)
February 29, 2020
the net investment income ratio. The error did not impact the net increase or decrease in net assets resulting from operations, net assets, total return or NAV per share. The following represents the previously reported information and the corrected information:
  February 28, 2019
Previously Reported
February 28, 2019
Corrected
Statement of Changes in Net Assets    
Net investment income $28,373,886 $40,968,366
Net realized gain 10,747,810 8,276,974
Net change in unrealized depreciation (126,888,572) (137,012,216)
Net decrease in net assets resulting from operations (87,766,876) (87,766,876)
    
  February 28, 2019
Financial Highlights Class A Advisor
Class
Class C Institutional
Class
Institutional 2
Class
Institutional 3
Class
Class R
Previously Reported              
Net Investment Income 0.20 0.20 0.13 0.21 0.14 0.23 0.15
Net realized and unrealized gain (loss) (1.03) (1.02) (1.02) (1.02) (0.94) (1.03) (0.99)
Net investment income ratio to average net assets 2.10% 2.10% 1.41% 2.23% 1.58% 2.36% 1.57%
Corrected              
Net Investment Income 0.27 0.28 0.20 0.29 0.30 0.30 0.23
Net realized and unrealized gain (loss) (1.10) (1.10) (1.09) (1.10) (1.10) (1.10) (1.07)
Net investment income ratio to average net assets 2.80% 2.96% 2.09% 3.05% 3.39% 3.11% 2.47%
Note 11. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued. Other than as noted below, there were no items requiring adjustment of the financial statements or additional disclosure.
On March 31, 2020, certain European issuers canceled dividends following a request originating from the Bank of England, amid the economic uncertainty surrounding the COVID 19 pandemic. These financial statements include income recorded on the ex-date of these securities, in the amount of $981,274, which was 1.28% of total income. Upon notification of the cancelation, the Fund reversed the income previously recognized.
Note 12. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
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Table of Contents
Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Overseas Value Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Overseas Value Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 29, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
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Table of Contents
 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
Foreign
taxes paid
to foreign
countries
Foreign
taxes paid
per share
to foreign
countries
Foreign
source
income
Foreign
source
income per
share
100.00% 0.52% $12,885,533 $5,821,920 $0.03 $81,975,146 $0.40
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
Foreign taxes. The Fund makes the election to pass through to shareholders the foreign taxes paid. Eligible shareholders may claim a foreign tax credit. These taxes, and the corresponding foreign source income, are provided.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
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Table of Contents
TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
40 Columbia Overseas Value Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Overseas Value Fund  | Annual Report 2020
41

Table of Contents
TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
42 Columbia Overseas Value Fund  | Annual Report 2020

Table of Contents
TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Overseas Value Fund  | Annual Report 2020
43

Columbia Overseas Value Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN208_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Convertible Securities Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Convertible Securities Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Convertible Securities Fund  |  Annual Report 2020

Table of Contents
Fund at a Glance
Investment objective
The Fund seeks total return, consisting of capital appreciation and current income.
Portfolio management
David King, CFA
Lead Portfolio Manager
Managed Fund since 2010
Yan Jin
Portfolio Manager
Managed Fund since 2006
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 09/25/87 12.55 7.90 10.05
  Including sales charges   6.06 6.63 9.40
Advisor Class* 11/08/12 12.84 8.18 10.26
Class C Excluding sales charges 10/21/96 11.71 7.10 9.23
  Including sales charges   10.71 7.10 9.23
Institutional Class 05/21/99 12.81 8.17 10.33
Institutional 2 Class* 11/08/12 12.88 8.26 10.33
Institutional 3 Class* 10/01/14 12.97 8.31 10.28
Class R* 11/16/11 12.23 7.63 9.74
ICE BofA All Convertibles All Qualities Index   11.59 7.75 9.97
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The ICE BofA All Convertibles All Qualities Index measures the performance of U.S. dollar-denominated convertible securities not currently in bankruptcy with a total market value greater than $50 million at issuance. Effective January 1, 2020, the ICE BofAML All Convertibles All Qualities Index was re-branded the ICE BofA All Convertibles All Qualities Index.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Convertible Securities Fund  | Annual Report 2020
3

Table of Contents
Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Convertible Securities Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 1.8
Convertible Bonds 73.6
Convertible Preferred Stocks 22.6
Money Market Funds 2.0
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
4 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Manager Discussion of Fund Performance
For the 12-month period ended February 29, 2020, the Fund’s Class A shares returned 12.55% excluding sales charges. The Fund outperformed its benchmark, the ICE BofA All Convertibles All Qualities Index, which returned 11.59% for the same time period. Convertible securities outperformed the U.S. stock market and performed in line with broad measures of the U.S. bond market.
Global uncertainty curbed stock market gains, boosted bonds
Optimism prevailed early in 2019, buoyed by solid economic growth and a recovery from meaningful stock market losses in 2018. Strong job gains drove the unemployment rate down to 3.5%, annualized. Consumer spending and export trade supported U.S. economic growth. However, the pace of U.S. growth slowed to an estimated 2.1% for the year. In Europe, economic growth slowed as trade tensions and uncertainty mounted regarding Brexit (the U.K’s departure from the European Union), which was finally resolved late in the year. At the same time, emerging markets came under pressure, driven by trade and tariff concerns. China’s economic conditions weakened and the spread of the Coronavirus introduced enough global uncertainty to drive stock markets around the world down sharply in the final week of the period, raising concerns about the impact on global economic growth going forward. Bonds and convertible securities benefited as interest rates moved lower and investors fled the stock market.
Against this backdrop, the S&P 500 Index returned 8.19% for the 12-month period, giving up substantial gains during the last few trading days of February. The Bloomberg Barclays U.S. Aggregate Bond Index gained 11.68%, as the yield on the 10-year U.S. Treasury fell to 1.10%. (Bond yields and prices move in opposite directions.)
Contributors and detractors
Despite year-end volatility, which cut into returns, convertible securities were among the top performing assets for the period. The Fund’s gains were driven by solid issue selection across a range of sectors. In technology, a position in semiconductor capital equipment company Lam Research Corp. common stock nearly doubled. Investors continue to be attracted to Lam Research for the high-growth potential associated with the chip memory market. The company has been aggressive in buying back its shares, and it pays a modest dividend. In the general area of software as a service (SAAS), RingCentral, Inc. convertibles generated a significant gain for the Fund on news of outstanding revenue growth for the company, a leading provider of global enterprise videoconferencing. Investors also responded favorably to RingCentral’s announced partnership with Avaya Holdings Corp., a communications software maker. We sold the high-performing convertible and bought a newer, more defensive issue for the Fund. In the health care sector, Teledoc Health, Inc. was a standout performer. The medical diagnostics company, which uses telephone and videoconferencing technology to provide on-demand remote medical care, benefited against the backdrop of the Coronavirus outbreak. We trimmed some of the Fund’s holdings on strong gains. Also in health care, Medicines Co. convertibles made a solid contribution to Fund returns, as the company’s announced takeover at a significant premium by Swiss pharmaceutical giant Novartis International AG boosted its shares. We sold the position.
Merger and acquisition activity also figured into Fund gains from Caesars Entertainment Corp., Cypress Semiconductor Corporation and Array BioPharma, Inc. Late in 2019, Caesars and Eldorado Resorts, both casino operators, announced a merger, which was favorably received by investors. German chipmaker Infineon Technologies AG announced its intent to purchase Cypress Semiconductor in a deal that has yet to close. We exited the position. Array BioPharma, which develops small molecule medicines primarily to treat cancer, was acquired at a premium by Pfizer, Inc.
In a year of few disappointments, an underweight in Tesla, Inc. detracted from relative results even though Tesla’s strong gains made a significant contribution to Fund returns. Energy holdings were mostly down for the year. A position in Chesapeake Energy Corp. convertibles was a significant detractor as the company may be facing bankruptcy. While the outlook for the company is not good, it has not defaulted on current payments and we maintained a small position. Wrestling and media company World Wrestling Entertainment, Inc. detracted from results, as the company’s revenues and declining subscriptions dropped. We exited the position before its most significant drop.
At period’s end
During the period, we took advantage of an increase in convertibles issuance, which has continued to improve since 2018. We believe that our research-driven process is an advantage in an environment of abundant new issuance. We also believe that recent volatility has worked in our favor because we are active managers, seeking to exploit market inefficiencies through
Columbia Convertible Securities Fund  | Annual Report 2020
5

Table of Contents
Manager Discussion of Fund Performance  (continued)
careful security selection. We continue to use bottom-up security selection to target convertibles and other income-generating securities that we believe have the potential for both price appreciation and high current income. We believe the Fund continues to offer long-term investors a solid building block for diversification.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Convertible securities are subject to issuer default risk. A rise in interest rates may result in a price decline of fixed-income instruments held by the Fund, negatively impacting its performance and NAV. Falling rates may result in the Fund investing in lower yielding debt instruments, lowering the Fund’s income and yield. These risks may be heightened for longer maturity and duration securities. The Fund may also be forced to convert a convertible security at an inopportune time, which may decrease the Fund’s return. Non-investment-grade (high-yield or junk) securities present greater price volatility and more risk to principal and income than higher rated securities. Foreign investments subject the Fund to risks, including political, economic, market, social and others within a particular country, as well as to currency instabilities and less stringent financial and accounting standards generally applicable to U.S. issuers. Short positions (where the underlying asset is not owned) can create unlimited risk. Market or other (e.g., interest rate) environments may adversely affect the liquidity of Fund investments, negatively impacting their price. Generally, the less liquid the market at the time the Fund sells a holding, the greater the risk of loss or decline of value to the Fund.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,068.40 1,019.29 5.76 5.62 1.12
Advisor Class 1,000.00 1,000.00 1,070.00 1,020.54 4.48 4.37 0.87
Class C 1,000.00 1,000.00 1,064.70 1,015.56 9.60 9.37 1.87
Institutional Class 1,000.00 1,000.00 1,069.70 1,020.54 4.48 4.37 0.87
Institutional 2 Class 1,000.00 1,000.00 1,069.90 1,020.84 4.17 4.07 0.81
Institutional 3 Class 1,000.00 1,000.00 1,070.50 1,021.03 3.96 3.87 0.77
Class R 1,000.00 1,000.00 1,067.20 1,018.05 7.04 6.87 1.37
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Convertible Securities Fund  | Annual Report 2020
7

Table of Contents
Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 1.7%
Issuer Shares Value ($)
Energy 0.1%
Oil, Gas & Consumable Fuels 0.1%
Ascent Resources, Class B(a),(b),(c) 10,248,729 2,295,715
Total Energy 2,295,715
Health Care 0.1%
Pharmaceuticals 0.1%
Amryt Pharma PLC, ADR(b) 274,086 1,995,511
Total Health Care 1,995,511
Information Technology 1.5%
Semiconductors & Semiconductor Equipment 0.9%
Lam Research Corp. 45,000 13,204,350
Technology Hardware, Storage & Peripherals 0.6%
Western Digital Corp. 140,000 7,778,400
Total Information Technology 20,982,750
Total Common Stocks
(Cost $13,358,141)
25,273,976
    
Convertible Bonds(d) 73.4%
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
Aerospace & Defense 0.6%
Aerojet Rocketdyne Holdings, Inc.
12/15/2023 2.250%   4,700,000 9,056,680
Automotive 2.7%
Tesla, Inc.
05/15/2024 2.000%   17,000,000 38,982,040
Cable and Satellite 1.9%
DISH Network Corp.
08/15/2026 3.375%   28,500,000 27,516,965
Consumer Cyclical Services 2.0%
Boingo Wireless, Inc.
10/01/2023 1.000%   10,500,000 9,584,271
Etsy, Inc.(e)
10/01/2026 0.125%   12,000,000 12,090,000
Zillow Group, Inc.(e)
09/01/2026 1.375%   5,000,000 7,231,706
Total 28,905,977
Convertible Bonds(d) (continued)
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
Consumer Products 0.5%
Winnebago Industries, Inc.(e)
04/01/2025 1.500%   7,000,000 7,486,084
Electric 0.9%
CenterPoint Energy, Inc.(f)
09/15/2029 4.516%   220,000 12,416,800
Finance Companies 1.6%
Ares Capital Corp.
03/01/2024 4.625%   7,000,000 7,459,375
Encore Capital Europe Finance Ltd.
09/01/2023 4.500%   7,000,000 7,604,061
LendingTree, Inc.
06/01/2022 0.625%   4,800,000 6,980,682
Total 22,044,118
Food and Beverage 1.0%
Chefs’ Warehouse, Inc. (The)(e)
12/01/2024 1.875%   7,500,000 7,382,812
Luckin Coffee, Inc.(e)
01/15/2025 0.750%   7,500,000 7,378,442
Total 14,761,254
Health Care 8.4%
CONMED Corp.
02/01/2024 2.625%   5,500,000 6,690,831
DexCom, Inc.
12/01/2023 0.750%   13,500,000 23,915,524
Exact Sciences Corp.
03/15/2027 0.375%   12,500,000 12,837,151
03/01/2028 0.375%   10,000,000 9,705,180
Insulet Corp.(e)
09/01/2026 0.375%   13,000,000 14,558,427
Invacare Corp.
11/15/2024 5.000%   5,600,000 5,045,797
Invitae Corp.(e)
09/01/2024 2.000%   8,000,000 8,362,962
Novavax, Inc.
02/01/2023 3.750%   9,700,000 6,303,060
NuVasive, Inc.(e),(g)
03/15/2025 0.375%   15,000,000 14,767,574
Repligen Corp.
07/15/2024 0.375%   6,500,000 6,780,653
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Convertible Bonds(d) (continued)
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
Teladoc Health, Inc.
05/15/2025 1.375%   4,500,000 10,870,442
Total 119,837,601
Home Construction 1.0%
KBR, Inc.
11/01/2023 2.500%   5,500,000 6,570,860
SunPower Corp.
01/15/2023 4.000%   8,030,000 7,257,113
Total 13,827,973
Independent Energy 0.2%
Chesapeake Energy Corp.
09/15/2026 5.500%   10,200,000 2,671,125
Life Insurance 0.7%
AXA SA(e)
05/15/2021 7.250%   9,000,000 9,401,940
Lodging 0.5%
Marriott Vacations Worldwide Corp.
09/15/2022 1.500%   7,000,000 6,890,974
Media and Entertainment 2.8%
Liberty Media Corp.(e)
12/01/2048 2.250%   12,500,000 13,516,777
12/01/2049 2.750%   7,500,000 7,515,000
Sea Ltd.(e)
12/01/2024 1.000%   7,000,000 8,105,097
Snap, Inc.(e)
08/01/2026 0.750%   10,500,000 10,673,191
Total 39,810,065
Metals and Mining 0.5%
Endeavour Mining Corp.(e)
02/15/2023 3.000%   6,500,000 6,747,650
Oil Field Services 0.6%
Nabors Industries, Inc.
01/15/2024 0.750%   14,000,000 8,761,018
Other Industry 1.2%
Chegg, Inc.
05/15/2023 0.250%   5,000,000 7,735,000
Green Plains, Inc.
09/01/2022 4.125%   11,000,000 9,888,766
Total 17,623,766
Other REIT 1.6%
Arbor Realty Trust, Inc.(e)
11/01/2022 4.750%   7,000,000 6,740,895
Convertible Bonds(d) (continued)
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
IH Merger Sub LLC
01/15/2022 3.500%   7,000,000 9,049,838
PennyMac Corp.(e)
11/01/2024 5.500%   7,000,000 6,877,500
Total 22,668,233
Pharmaceuticals 7.8%
Acorda Therapeutics, Inc.
06/15/2021 1.750%   3,500,000 3,054,766
Aegerion Pharmaceuticals, Inc.(a),(c)
04/01/2025 2.000%   4,460,000 0
Aegerion Pharmaceuticals, Inc.(e)
04/01/2025 5.000%   1,483,363 1,409,195
Aerie Pharmaceuticals, Inc.(e)
10/01/2024 1.500%   7,500,000 7,622,418
AMAG Pharmaceuticals, Inc.
06/01/2022 3.250%   8,000,000 6,870,567
Apellis Pharmaceuticals, Inc.(e)
09/15/2026 3.500%   6,000,000 7,220,060
Canopy Growth Corp.(e)
07/15/2023 4.250% CAD 3,000,000 1,924,939
Clovis Oncology, Inc.
05/01/2025 1.250%   21,000,000 13,216,875
Halozyme Therapeutics, Inc.(e)
12/01/2024 1.250%   6,500,000 6,991,400
Illumina, Inc.
06/15/2021 0.500%   8,000,000 9,433,200
Insmed, Inc.
01/15/2025 1.750%   13,500,000 13,474,688
Intercept Pharmaceuticals, Inc.
07/01/2023 3.250%   14,000,000 13,311,868
Radius Health, Inc.
09/01/2024 3.000%   8,500,000 7,309,675
Revance Therapeutics, Inc.(e)
02/15/2027 1.750%   7,500,000 7,506,173
Sarepta Therapeutics, Inc.
11/15/2024 1.500%   5,000,000 8,837,500
Verastem, Inc.
11/01/2048 5.000%   2,200,000 3,750,846
Total 111,934,170
Property & Casualty 0.7%
Heritage Insurance Holdings, Inc.
08/01/2037 5.875%   4,200,000 4,326,532
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
9

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Convertible Bonds(d) (continued)
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
MGIC Investment Corp.(e),(f)
Junior Subordinated
04/01/2063 9.000%   4,600,000 6,150,361
Total 10,476,893
Retailers 1.3%
Guess?, Inc.(e)
04/15/2024 2.000%   6,500,000 6,179,627
RH(e),(h)
09/15/2024 0.000%   12,000,000 12,825,043
Total 19,004,670
Technology 30.6%
Akamai Technologies, Inc.(e)
09/01/2027 0.375%   19,000,000 18,937,775
Alteryx, Inc.(e)
08/01/2024 0.500%   14,000,000 15,086,972
Atlassian, Inc.
05/01/2023 0.625%   6,500,000 11,962,610
Coupa Software, Inc.(e)
06/15/2025 0.125%   13,500,000 16,288,165
CSG Systems International, Inc.
03/15/2036 4.250%   8,500,000 9,162,150
CyberArk Software Ltd.(e),(h)
11/15/2024 0.000%   7,000,000 6,961,168
DocuSign, Inc.
09/15/2023 0.500%   8,500,000 11,545,545
Everbridge, Inc.(e)
12/15/2024 0.125%   10,500,000 12,262,329
Guidewire Software, Inc.
03/15/2025 1.250%   8,000,000 9,394,624
IAC Financeco 2, Inc.(e)
06/15/2026 0.875%   15,000,000 15,340,901
Infinera Corp.
09/01/2024 2.125%   6,643,000 6,585,505
InterDigital, Inc.(e)
06/01/2024 2.000%   9,500,000 9,459,595
Lumentum Holdings, Inc.
03/15/2024 0.250%   7,000,000 10,073,823
MercadoLibre, Inc.
08/15/2028 2.000%   5,000,000 8,021,540
Microchip Technology, Inc.
02/15/2027 1.625%   21,000,000 27,070,724
Junior Subordinated
02/15/2037 2.250%   22,000,000 28,415,354
MongoDB, Inc.(e)
01/15/2026 0.250%   13,500,000 14,226,148
Convertible Bonds(d) (continued)
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
Neurocrine Biosciences, Inc.
05/15/2024 2.250%   5,000,000 6,949,243
Okta, Inc.(e)
09/01/2025 0.125%   14,000,000 14,113,750
ON Semiconductor Corp.
10/15/2023 1.625%   13,000,000 15,502,461
Pegasystems, Inc.(e)
03/01/2025 0.750%   8,000,000 7,938,389
Proofpoint, Inc.(e)
08/15/2024 0.250%   9,000,000 9,016,875
Q2 Holdings, Inc.(e)
06/01/2026 0.750%   7,000,000 7,810,600
Rapid7, Inc.
08/01/2023 1.250%   5,500,000 7,124,136
ServiceNow, Inc.(h)
06/01/2022 0.000%   7,300,000 17,292,797
SMART Global Holdings, Inc.(e)
02/15/2026 2.250%   8,000,000 7,960,000
Splunk, Inc.
09/15/2025 1.125%   16,000,000 19,523,679
Square, Inc.
05/15/2023 0.500%   23,500,000 30,419,986
Tabula Rasa HealthCare, Inc.(e)
02/15/2026 1.750%   7,500,000 8,119,698
Teradyne, Inc.
12/15/2023 1.250%   5,000,000 9,601,161
Twilio, Inc.
06/01/2023 0.250%   6,000,000 10,093,844
Vishay Intertechnology, Inc.
06/15/2025 2.250%   13,500,000 13,356,900
Workday, Inc.
10/01/2022 0.250%   10,500,000 13,820,974
Zendesk, Inc.
03/15/2023 0.250%   6,000,000 8,372,373
Total 437,811,794
Transportation Services 0.7%
Atlas Air Worldwide Holdings, Inc.
06/01/2024 1.875%   12,000,000 10,441,915
Wireless 0.4%
Gogo, Inc.
05/15/2022 6.000%   5,300,000 4,779,938
Wirelines 3.2%
GCI Liberty, Inc.(e)
09/30/2046 1.750%   7,000,000 9,800,000
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Convertible Bonds(d) (continued)
Issuer Coupon
Rate
  Principal
Amount ($)
Value ($)
RingCentral, Inc.(e),(g),(h)
03/01/2025 0.000%   27,000,000 26,611,875
Vonage Holdings Corp.(e)
06/01/2024 1.750%   10,000,000 9,496,327
Total 45,908,202
Total Convertible Bonds
(Cost $966,087,986)
1,049,767,845
    
Convertible Preferred Stocks 22.6%
Issuer   Shares Value ($)
Consumer Staples 0.7%
Household Products 0.7%
Energizer Holdings, Inc. 7.500% 100,000 9,376,950
Total Consumer Staples 9,376,950
Financials 3.5%
Banks 2.4%
Bank of America Corp. 7.250% 23,000 34,821,998
Capital Markets 0.4%
Cowen, Inc. 5.625% 6,200 5,293,025
Insurance 0.7%
Assurant, Inc. 6.500% 85,000 10,014,624
Total Financials 50,129,647
Health Care 4.4%
Health Care Equipment & Supplies 2.9%
Becton Dickinson and Co. 6.125% 435,000 24,777,530
Danaher Corp. 4.750% 15,000 16,447,950
Total     41,225,480
Health Care Technology 0.6%
Change Healthcare, Inc. 6.000% 175,000 9,031,750
Life Sciences Tools & Services 0.9%
Avantor, Inc. 6.250% 225,000 12,583,372
Total Health Care 62,840,602
Industrials 1.4%
Machinery 1.4%
Colfax Corp. 5.750% 65,000 9,432,544
Stanley Black & Decker, Inc. 5.250% 115,000 10,766,760
Total     20,199,304
Total Industrials 20,199,304
Convertible Preferred Stocks (continued)
Issuer   Shares Value ($)
Information Technology 2.1%
Semiconductors & Semiconductor Equipment 2.1%
Broadcom, Inc. 8.000% 29,500 30,650,500
Total Information Technology 30,650,500
Materials 0.7%
Chemicals 0.7%
International Flavors & Fragrances, Inc. 6.000% 220,000 9,941,800
Total Materials 9,941,800
Real Estate 2.1%
Equity Real Estate Investment Trusts (REITS) 2.1%
Crown Castle International Corp. 6.875% 14,500 18,477,403
QTS Realty Trust, Inc. 6.500% 90,000 12,000,816
Total     30,478,219
Total Real Estate 30,478,219
Utilities 7.7%
Electric Utilities 5.1%
American Electric Power Co., Inc. 6.125% 315,000 16,433,676
NextEra Energy, Inc. 4.872% 270,000 13,861,233
NextEra Energy, Inc. 5.279% 640,000 29,235,200
Southern Co. (The) 6.750% 260,000 13,249,600
Total     72,779,709
Multi-Utilities 1.9%
Dominion Energy, Inc. 7.250% 135,000 13,702,500
DTE Energy Co. 6.250% 285,000 13,067,820
Total     26,770,320
Water Utilities 0.7%
Essential Utilities, Inc. 6.000% 175,000 10,116,610
Total Utilities 109,666,639
Total Convertible Preferred Stocks
(Cost $305,521,569)
323,283,661
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
11

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Money Market Funds 2.0%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(i),(j) 28,318,922 28,318,922
Total Money Market Funds
(Cost $28,316,320)
28,318,922
Total Investments in Securities
(Cost: $1,313,284,016)
1,426,644,404
Other Assets & Liabilities, Net   3,830,171
Net Assets 1,430,474,575
Notes to Portfolio of Investments
(a) Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At February 29, 2020, the total value of these securities amounted to $2,295,715, which represents 0.16% of total net assets.
(b) Non-income producing investment.
(c) Valuation based on significant unobservable inputs.
(d) Principal amounts are denominated in United States Dollars unless otherwise noted.
(e) Represents privately placed and other securities and instruments exempt from Securities and Exchange Commission registration (collectively, private placements), such as Section 4(a)(2) and Rule 144A eligible securities, which are often sold only to qualified institutional buyers. The Fund may invest in private placements determined to be liquid as well as those determined to be illiquid. Private placements may be determined to be liquid under guidelines established by the Fund’s Board of Trustees. At February 29, 2020, the total value of these securities amounted to $416,095,840, which represents 29.09% of total net assets.
(f) Represents a variable rate security with a step coupon where the rate adjusts according to a schedule for a series of periods, typically lower for an initial period and then increasing to a higher coupon rate thereafter. The interest rate shown was the current rate as of February 29, 2020.
(g) Represents a security purchased on a when-issued basis.
(h) Zero coupon bond.
(i) The rate shown is the seven-day current annualized yield at February 29, 2020.
(j) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  51,277,519 547,219,819 (570,178,416) 28,318,922 (902) 2,602 642,490 28,318,922
Abbreviation Legend
ADR American Depositary Receipt
Currency Legend
CAD Canada Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Foreign equity securities actively traded in markets where there is a significant delay in the local close relative to the New York Stock Exchange are classified as Level 2. The values of these securities may include an adjustment to reflect the impact of market movements following the close of local trading, as described in Note 2 to the financial statements – Security valuation.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Energy 2,295,715 2,295,715
Health Care 1,995,511 1,995,511
Information Technology 20,982,750 20,982,750
Total Common Stocks 20,982,750 1,995,511 2,295,715 25,273,976
Convertible Bonds 1,049,767,845 1,049,767,845
Convertible Preferred Stocks        
Consumer Staples 9,376,950 0* 9,376,950
Financials 50,129,647 50,129,647
Health Care 62,840,602 62,840,602
Industrials 20,199,304 20,199,304
Information Technology 30,650,500 30,650,500
Materials 9,941,800 9,941,800
Real Estate 30,478,219 30,478,219
Utilities 109,666,639 109,666,639
Total Convertible Preferred Stocks 323,283,661 0* 323,283,661
Money Market Funds 28,318,922 28,318,922
Total Investments in Securities 49,301,672 1,375,047,017 2,295,715 1,426,644,404
    
* Rounds to zero.
See the Portfolio of Investments for all investment classifications not indicated in the table.
The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets. These assets include certain foreign securities for which a third party statistical pricing service may be employed for purposes of fair market valuation. The model utilized by such third party statistical pricing service takes into account a security’s correlation to available market data including, but not limited to, intraday index, ADR, and exchange-traded fund movements.
The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
13

Table of Contents
Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $1,284,967,696) $1,398,325,482
Affiliated issuers (cost $28,316,320) 28,318,922
Receivable for:  
Investments sold 44,654,257
Capital shares sold 3,537,656
Dividends 718,472
Interest 4,186,484
Expense reimbursement due from Investment Manager 1,477
Prepaid expenses 2,806
Total assets 1,479,745,556
Liabilities  
Payable for:  
Investments purchased 2,458,823
Investments purchased on a delayed delivery basis 41,940,000
Capital shares purchased 4,524,049
Management services fees 30,405
Distribution and/or service fees 3,933
Transfer agent fees 110,719
Compensation of board members 140,587
Other expenses 62,465
Total liabilities 49,270,981
Net assets applicable to outstanding capital stock $1,430,474,575
Represented by  
Paid in capital 1,271,994,177
Total distributable earnings (loss) 158,480,398
Total - representing net assets applicable to outstanding capital stock $1,430,474,575
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Statement of Assets and Liabilities  (continued)
February 29, 2020
Class A  
Net assets $317,364,806
Shares outstanding 14,366,913
Net asset value per share $22.09
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $23.44
Advisor Class  
Net assets $94,944,982
Shares outstanding 4,250,727
Net asset value per share $22.34
Class C  
Net assets $62,312,851
Shares outstanding 2,832,527
Net asset value per share $22.00
Institutional Class  
Net assets $733,399,936
Shares outstanding 33,135,225
Net asset value per share $22.13
Institutional 2 Class  
Net assets $92,232,717
Shares outstanding 4,133,742
Net asset value per share $22.31
Institutional 3 Class  
Net assets $128,318,963
Shares outstanding 5,703,193
Net asset value per share $22.50
Class R  
Net assets $1,900,320
Shares outstanding 86,124
Net asset value per share $22.06
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
15

Table of Contents
Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $15,598,229
Dividends — affiliated issuers 642,490
Interest 21,242,053
Interfund lending 91
Foreign taxes withheld (7,931)
Total income 37,474,932
Expenses:  
Management services fees 9,961,757
Distribution and/or service fees  
Class A 765,289
Class C 525,009
Class R 10,588
Transfer agent fees  
Class A 340,232
Advisor Class 80,198
Class C 58,227
Institutional Class 707,311
Institutional 2 Class 60,649
Institutional 3 Class 8,680
Class R 2,358
Compensation of board members 43,315
Custodian fees 12,752
Printing and postage fees 87,219
Registration fees 161,579
Audit fees 29,750
Legal fees 18,870
Interest on interfund lending 198
Compensation of chief compliance officer 271
Other 41,113
Total expenses 12,915,365
Fees waived or expenses reimbursed by Investment Manager and its affiliates (660,488)
Fees waived by transfer agent  
Institutional 2 Class (2,314)
Institutional 3 Class (2,467)
Expense reduction (580)
Total net expenses 12,249,516
Net investment income 25,225,416
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 96,071,992
Investments — affiliated issuers (902)
Foreign currency translations 1,458
Net realized gain 96,072,548
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers 28,212,283
Investments — affiliated issuers 2,602
Foreign currency translations (235)
Net change in unrealized appreciation (depreciation) 28,214,650
Net realized and unrealized gain 124,287,198
Net increase in net assets resulting from operations $149,512,614
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $25,225,416 $19,521,831
Net realized gain 96,072,548 49,816,976
Net change in unrealized appreciation (depreciation) 28,214,650 (145,667)
Net increase in net assets resulting from operations 149,512,614 69,193,140
Distributions to shareholders    
Net investment income and net realized gains    
Class A (19,462,475) (12,738,952)
Advisor Class (4,865,869) (1,481,568)
Class C (3,070,845) (1,662,746)
Institutional Class (42,810,874) (24,982,005)
Institutional 2 Class (6,918,147) (3,368,780)
Institutional 3 Class (7,115,129) (4,841,333)
Class R (122,603) (118,214)
Class T (1,687)
Total distributions to shareholders (84,365,942) (49,195,285)
Increase in net assets from capital stock activity 256,745,390 245,000,419
Total increase in net assets 321,892,062 264,998,274
Net assets at beginning of year 1,108,582,513 843,584,239
Net assets at end of year $1,430,474,575 $1,108,582,513
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
17

Table of Contents
Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 4,360,574 94,935,324 4,172,480 85,945,217
Distributions reinvested 638,016 13,768,058 431,159 8,523,504
Redemptions (4,307,203) (93,362,623) (3,082,744) (62,933,185)
Net increase 691,387 15,340,759 1,520,895 31,535,536
Advisor Class        
Subscriptions 3,314,559 73,339,965 2,549,520 52,499,070
Distributions reinvested 222,512 4,854,911 73,988 1,481,424
Redemptions (1,722,208) (37,901,225) (1,081,929) (22,255,559)
Net increase 1,814,863 40,293,651 1,541,579 31,724,935
Class C        
Subscriptions 1,070,570 23,306,724 683,086 14,015,683
Distributions reinvested 123,128 2,653,398 72,090 1,413,721
Redemptions (474,408) (10,254,412) (629,862) (13,016,084)
Net increase 719,290 15,705,710 125,314 2,413,320
Institutional Class        
Subscriptions 13,888,726 303,951,549 15,114,824 312,133,611
Distributions reinvested 1,535,050 33,176,052 916,774 18,154,010
Redemptions (8,252,510) (179,691,428) (9,303,311) (186,562,038)
Net increase 7,171,266 157,436,173 6,728,287 143,725,583
Institutional 2 Class        
Subscriptions 5,014,833 109,175,210 2,622,930 54,101,373
Distributions reinvested 318,069 6,915,549 168,798 3,368,633
Redemptions (5,005,134) (110,303,792) (1,400,041) (27,998,257)
Net increase 327,768 5,786,967 1,391,687 29,471,749
Institutional 3 Class        
Subscriptions 1,833,426 40,855,531 833,390 17,415,288
Distributions reinvested 324,002 7,114,937 240,177 4,840,196
Redemptions (1,159,672) (25,218,350) (738,309) (15,321,230)
Net increase 997,756 22,752,118 335,258 6,934,254
Class R        
Subscriptions 42,464 932,277 24,847 507,976
Distributions reinvested 2,063 44,526 1,340 26,465
Redemptions (70,252) (1,546,791) (63,010) (1,295,811)
Net decrease (25,725) (569,988) (36,823) (761,370)
Class T        
Distributions reinvested 78 1,548
Redemptions (2,311) (45,136)
Net decrease (2,233) (43,588)
Total net increase 11,696,605 256,745,390 11,603,964 245,000,419
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Convertible Securities Fund  | Annual Report 2020

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Columbia Convertible Securities Fund  | Annual Report 2020
19

Table of Contents
Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $20.92 0.39 2.18 2.57 (0.50) (0.90) (1.40)
Year Ended 2/28/2019 $20.41 0.39 1.11 1.50 (0.40) (0.59) (0.99)
Year Ended 2/28/2018 $18.64 0.43 1.89 2.32 (0.55) (0.55)
Year Ended 2/28/2017 $15.07 0.47 3.52 3.99 (0.42) (0.42)
Year Ended 2/29/2016 $19.53 0.38 (3.25) (2.87) (0.75) (0.87) (1.62)
Advisor Class
Year Ended 2/29/2020 $21.14 0.45 2.20 2.65 (0.55) (0.90) (1.45)
Year Ended 2/28/2019 $20.61 0.44 1.13 1.57 (0.45) (0.59) (1.04)
Year Ended 2/28/2018 $18.82 0.48 1.90 2.38 (0.59) (0.59)
Year Ended 2/28/2017 $15.21 0.50 3.57 4.07 (0.46) (0.46)
Year Ended 2/29/2016 $19.69 0.45 (3.29) (2.84) (0.80) (0.87) (1.67)
Class C
Year Ended 2/29/2020 $20.84 0.23 2.17 2.40 (0.34) (0.90) (1.24)
Year Ended 2/28/2019 $20.33 0.23 1.12 1.35 (0.25) (0.59) (0.84)
Year Ended 2/28/2018 $18.57 0.29 1.87 2.16 (0.40) (0.40)
Year Ended 2/28/2017 $15.02 0.34 3.50 3.84 (0.29) (0.29)
Year Ended 2/29/2016 $19.46 0.25 (3.24) (2.99) (0.61) (0.87) (1.48)
Institutional Class
Year Ended 2/29/2020 $20.96 0.45 2.17 2.62 (0.55) (0.90) (1.45)
Year Ended 2/28/2019 $20.44 0.44 1.12 1.56 (0.45) (0.59) (1.04)
Year Ended 2/28/2018 $18.67 0.48 1.88 2.36 (0.59) (0.59)
Year Ended 2/28/2017 $15.10 0.51 3.52 4.03 (0.46) (0.46)
Year Ended 2/29/2016 $19.56 0.42 (3.24) (2.82) (0.80) (0.87) (1.67)
Institutional 2 Class
Year Ended 2/29/2020 $21.12 0.47 2.18 2.65 (0.56) (0.90) (1.46)
Year Ended 2/28/2019 $20.59 0.45 1.14 1.59 (0.47) (0.59) (1.06)
Year Ended 2/28/2018 $18.80 0.50 1.90 2.40 (0.61) (0.61)
Year Ended 2/28/2017 $15.20 0.52 3.55 4.07 (0.47) (0.47)
Year Ended 2/29/2016 $19.68 0.45 (3.27) (2.82) (0.82) (0.87) (1.69)
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Financial Highlights  (continued)
  Proceeds from
regulatory
settlements
Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $22.09 12.55% 1.17%(c) 1.12%(c),(d) 1.81% 74% $317,365
Year Ended 2/28/2019 $20.92 7.70% 1.20%(c) 1.13%(c),(d) 1.88% 60% $286,075
Year Ended 2/28/2018 $20.41 12.65% 1.22% 1.12%(d) 2.21% 67% $248,052
Year Ended 2/28/2017 $18.64 26.68% 1.25% 1.13%(d) 2.73% 72% $289,232
Year Ended 2/29/2016 0.03 $15.07 (15.46%)(e) 1.23%(f) 1.11%(d),(f) 2.11% 71% $287,364
Advisor Class
Year Ended 2/29/2020 $22.34 12.84% 0.92%(c) 0.87%(c),(d) 2.06% 74% $94,945
Year Ended 2/28/2019 $21.14 7.99% 0.95%(c) 0.88%(c),(d) 2.15% 60% $51,487
Year Ended 2/28/2018 $20.61 12.91% 0.97% 0.87%(d) 2.43% 67% $18,432
Year Ended 2/28/2017 $18.82 27.00% 1.00% 0.88%(d) 2.95% 72% $11,789
Year Ended 2/29/2016 0.03 $15.21 (15.21%)(e) 1.00%(f) 0.87%(d),(f) 2.59% 71% $14,556
Class C
Year Ended 2/29/2020 $22.00 11.71% 1.92%(c) 1.87%(c),(d) 1.06% 74% $62,313
Year Ended 2/28/2019 $20.84 6.92% 1.95%(c) 1.88%(c),(d) 1.14% 60% $44,035
Year Ended 2/28/2018 $20.33 11.80% 1.97% 1.87%(d) 1.47% 67% $40,419
Year Ended 2/28/2017 $18.57 25.70% 2.00% 1.88%(d) 1.98% 72% $42,161
Year Ended 2/29/2016 0.03 $15.02 (16.06%)(e) 1.99%(f) 1.87%(d),(f) 1.38% 71% $47,322
Institutional Class
Year Ended 2/29/2020 $22.13 12.81% 0.92%(c) 0.87%(c),(d) 2.06% 74% $733,400
Year Ended 2/28/2019 $20.96 8.00% 0.95%(c) 0.88%(c),(d) 2.13% 60% $544,140
Year Ended 2/28/2018 $20.44 12.91% 0.97% 0.87%(d) 2.49% 67% $393,240
Year Ended 2/28/2017 $18.67 26.94% 1.00% 0.88%(d) 2.97% 72% $229,113
Year Ended 2/29/2016 0.03 $15.10 (15.21%)(e) 0.98%(f) 0.86%(d),(f) 2.27% 71% $203,574
Institutional 2 Class
Year Ended 2/29/2020 $22.31 12.88% 0.87%(c) 0.81%(c) 2.13% 74% $92,233
Year Ended 2/28/2019 $21.12 8.07% 0.89%(c) 0.81%(c) 2.19% 60% $80,367
Year Ended 2/28/2018 $20.59 13.02% 0.90% 0.80% 2.54% 67% $49,709
Year Ended 2/28/2017 $18.80 27.08% 0.90% 0.79% 3.02% 72% $65,291
Year Ended 2/29/2016 0.03 $15.20 (15.13%)(e) 0.87%(f) 0.76%(f) 2.48% 71% $38,717
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
21

Table of Contents
Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Institutional 3 Class
Year Ended 2/29/2020 $21.28 0.48 2.21 2.69 (0.57) (0.90) (1.47)
Year Ended 2/28/2019 $20.74 0.47 1.14 1.61 (0.48) (0.59) (1.07)
Year Ended 2/28/2018 $18.94 0.51 1.91 2.42 (0.62) (0.62)
Year Ended 2/28/2017 $15.31 0.53 3.58 4.11 (0.48) (0.48)
Year Ended 2/29/2016 $19.81 0.51 (3.34) (2.83) (0.83) (0.87) (1.70)
Class R
Year Ended 2/29/2020 $20.90 0.34 2.16 2.50 (0.44) (0.90) (1.34)
Year Ended 2/28/2019 $20.39 0.33 1.12 1.45 (0.35) (0.59) (0.94)
Year Ended 2/28/2018 $18.62 0.38 1.89 2.27 (0.50) (0.50)
Year Ended 2/28/2017 $15.06 0.42 3.51 3.93 (0.37) (0.37)
Year Ended 2/29/2016 $19.51 0.34 (3.24) (2.90) (0.71) (0.87) (1.58)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) Ratios include interfund lending expense which is less than 0.01%.
(d) The benefits derived from expense reductions had an impact of less than 0.01%.
(e) The Fund received proceeds from regulatory settlements. Had the Fund not received these proceeds, the total return would have been lower by 0.14%.
(f) Ratios include line of credit interest expense which is less than 0.01%.
The accompanying Notes to Financial Statements are an integral part of this statement.
22 Columbia Convertible Securities Fund  | Annual Report 2020

Table of Contents
Financial Highlights  (continued)
  Proceeds from
regulatory
settlements
Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Institutional 3 Class
Year Ended 2/29/2020 $22.50 12.97% 0.82%(c) 0.77%(c) 2.17% 74% $128,319
Year Ended 2/28/2019 $21.28 8.11% 0.84%(c) 0.76%(c) 2.25% 60% $100,142
Year Ended 2/28/2018 $20.74 13.03% 0.85% 0.75% 2.58% 67% $90,655
Year Ended 2/28/2017 $18.94 27.14% 0.85% 0.74% 3.06% 72% $1,269
Year Ended 2/29/2016 0.03 $15.31 (15.09%)(e) 0.84%(f) 0.72%(f) 3.01% 71% $812
Class R
Year Ended 2/29/2020 $22.06 12.23% 1.42%(c) 1.37%(c),(d) 1.56% 74% $1,900
Year Ended 2/28/2019 $20.90 7.44% 1.45%(c) 1.38%(c),(d) 1.63% 60% $2,337
Year Ended 2/28/2018 $20.39 12.38% 1.47% 1.37%(d) 1.97% 67% $3,031
Year Ended 2/28/2017 $18.62 26.32% 1.50% 1.38%(d) 2.44% 72% $3,240
Year Ended 2/29/2016 0.03 $15.06 (15.63%)(e) 1.49%(f) 1.37%(d),(f) 1.91% 71% $2,429
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Convertible Securities Fund  | Annual Report 2020
23

Table of Contents
Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Convertible Securities Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Debt securities generally are valued by pricing services approved by the Board of Trustees based upon market transactions for normal, institutional-size trading units of similar securities. The services may use various pricing techniques that take into account, as applicable, factors such as yield, quality, coupon rate, maturity, type of issue, trading characteristics and other data, as well as approved independent broker-dealer quotes. Debt securities for which quotations are not readily available or not believed to be reflective of market value may also be valued based upon a bid quote from an approved independent broker-dealer. Debt securities maturing in 60 days or less are valued primarily at amortized cost value, unless this method results in a valuation that management believes does not approximate market value.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple
24 Columbia Convertible Securities Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Foreign currency transactions and translations
The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.
For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.
Delayed delivery securities
The Fund may trade securities on other than normal settlement terms, including securities purchased or sold on a “when-issued” or "forward commitment" basis. This may increase risk to the Fund since the other party to the transaction may fail to deliver, which could cause the Fund to subsequently invest at less advantageous prices. The Fund designates cash or liquid securities in an amount equal to the delayed delivery commitment.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Interest income is recorded on an accrual basis. Market premiums and discounts, including original issue discounts, are amortized and accreted, respectively, over the expected life of the security on all debt securities, unless otherwise noted. For convertible securities, premiums attributable to the conversion feature are not amortized.
The Fund may place a debt security on non-accrual status and reduce related interest income when it becomes probable that the interest will not be collected and the amount of uncollectible interest can be reasonably estimated. A defaulted debt security is removed from non-accrual status when the issuer resumes interest payments or when collectibility of interest is reasonably assured.
Corporate actions and dividend income are recorded on the ex-dividend date.
Columbia Convertible Securities Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid each calendar quarter. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
26 Columbia Convertible Securities Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.82% to 0.67% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.78% of the Fund’s average daily net assets.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class. In addition, prior to July 1, 2019, Institutional 2 Class shares were subject to a contractual transfer agency fee annual limitation of not more than 0.05% and Institutional 3 Class shares were subject to a contractual transfer agency fee annual limitation of not more than 0.00% of the average daily net assets attributable to each share class.
Columbia Convertible Securities Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.11
Advisor Class 0.11
Class C 0.11
Institutional Class 0.11
Institutional 2 Class 0.06
Institutional 3 Class 0.01
Class R 0.11
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $580.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 776,404
Class C 1.00(b) 8,381
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
28 Columbia Convertible Securities Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 1.13% 1.13%
Advisor Class 0.88 0.88
Class C 1.88 1.88
Institutional Class 0.88 0.88
Institutional 2 Class 0.81 0.81
Institutional 3 Class 0.77 0.76
Class R 1.38 1.38
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. In addition to the contractual agreement, the Investment Manager and certain of its affiliates have voluntarily agreed to waive fees and/or reimburse Fund expenses (excluding certain fees and expenses described above) so that Fund level expenses (expenses directly attributable to the Fund and not to a specific share class) are waived proportionately across all share classes, but the Fund’s net operating expenses shall not exceed the contractual annual rates listed in the table above. This arrangement may be revised or discontinued at any time. Reflected in the contractual cap commitment, prior to July 1, 2019, is the Transfer Agent’s contractual agreement to limit total transfer agency fees to an annual rate of not more than 0.05% for Institutional 2 Class and 0.00% for Institutional 3 Class of the average daily net assets attributable to each share class. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, re-characterization of distributions for investments, principal and/or interest of fixed income securities, foreign currency transactions, deemed distributions, non-deductible expenses and amortization/accretion on certain convertible securities. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Undistributed net
investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
7,500,547 (7,491,014) (9,533)
Columbia Convertible Securities Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
48,258,619 36,107,323 84,365,942 20,534,084 28,661,201 49,195,285
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
30,042,484 18,837,137 109,739,671
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
1,316,904,733 142,816,356 (33,076,685) 109,739,671
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $1,118,562,949 and $914,833,452, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
30 Columbia Convertible Securities Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Borrower 900,000 2.64 3
Lender 700,000 2.34 2
Interest income earned by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at February 29, 2020.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Convertible securities risk
Convertible securities are subject to the usual risks associated with debt instruments, such as interest rate risk and credit risk. Convertible securities also react to changes in the value of the common stock into which they convert, and are thus subject to market risk. The Fund may also be forced to convert a convertible security at an inopportune time, which may decrease the Fund’s return.
Credit risk
Credit risk is the risk that the value of debt instruments in the Fund’s portfolio may decline because the issuer defaults or otherwise becomes unable or unwilling, or is perceived to be unable or unwilling, to honor its financial obligations, such as making payments to the Fund when due. Credit rating agencies assign credit ratings to certain debt instruments to indicate their credit risk. Lower rated or unrated debt instruments held by the Fund may present increased credit risk as compared to higher-rated debt instruments.
Interest rate risk
Interest rate risk is the risk of losses attributable to changes in interest rates. In general, if prevailing interest rates rise, the values of debt securities tend to fall, and if interest rates fall, the values of debt securities tend to rise. Actions by governments and central banking authorities can result in increases in interest rates. Increasing interest rates may negatively affect the value of debt securities held by the Fund, resulting in a negative impact on the Fund’s performance and net asset value per share. In general, the longer the maturity or duration of a debt security, the greater its sensitivity to changes in interest rates. The Fund is subject to the risk that the income generated by its investments may not keep pace with inflation.
Columbia Convertible Securities Fund  | Annual Report 2020
31

Notes to Financial Statements  (continued)
February 29, 2020
Liquidity risk
Liquidity risk is the risk associated with a lack of marketability of investments which may make it difficult to sell the investment at a desirable time or price. Changing regulatory, market or other conditions or environments (for example, the interest rate or credit environments) may adversely affect the liquidity of the Fund’s investments. The Fund may have to accept a lower selling price for the holding, sell other investments, or forego another, more appealing investment opportunity. Generally, the less liquid the market at the time the Fund sells a portfolio investment, the greater the risk of loss or decline of value to the Fund. A less liquid market can lead to an increase in Fund redemptions, which may negatively impact Fund performance and net asset value per share, including, for example, if the Fund is forced to sell securities in a down market.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
32 Columbia Convertible Securities Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 17.9% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 27.1% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
Columbia Convertible Securities Fund  | Annual Report 2020
33

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Convertible Securities Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Convertible Securities Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the five years in the period ended February 29, 2020 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the five years in the period ended February 29, 2020 in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
34 Columbia Convertible Securities Fund  | Annual Report 2020

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
14.47% 14.41% $47,975,419
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Columbia Convertible Securities Fund  | Annual Report 2020
35

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
36 Columbia Convertible Securities Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Convertible Securities Fund  | Annual Report 2020
37

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
38 Columbia Convertible Securities Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Convertible Securities Fund  | Annual Report 2020
39

Columbia Convertible Securities Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN134_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Select Large Cap Equity Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Select Large Cap Equity Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Select Large Cap Equity Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks long-term capital appreciation.
Portfolio management
Peter Santoro, CFA
Co-Portfolio Manager
Managed Fund since 2004
Melda Mergen, CFA, CAIA
Co-Portfolio Manager
Managed Fund since 2014
Tiffany Wade
Co-Portfolio Manager
Managed Fund since November 2019
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 08/02/99 7.30 9.11 11.87
  Including sales charges   1.14 7.83 11.21
Advisor Class* 07/05/17 7.58 9.37 12.14
Class C Excluding sales charges 08/02/99 6.45 8.29 11.03
  Including sales charges   5.45 8.29 11.03
Institutional Class 10/02/98 7.54 9.38 12.14
Institutional 2 Class* 11/08/12 7.61 9.46 12.21
Institutional 3 Class* 03/01/17 7.72 9.46 12.18
S&P 500 Index   8.19 9.23 12.65
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The S&P 500 Index, an unmanaged index, measures the performance of 500 widely held, large-capitalization U.S. stocks and is frequently used as a general measure of market performance.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Select Large Cap Equity Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 99.1
Money Market Funds 0.9
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 13.0
Consumer Discretionary 9.4
Consumer Staples 6.1
Energy 2.5
Financials 10.8
Health Care 13.6
Industrials 9.7
Information Technology 26.1
Materials 1.2
Real Estate 3.6
Utilities 4.0
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Manager Discussion of Fund Performance
At February 29, 2020, approximately 42.1% of the Fund’s shares were owned in the aggregate by affiliated funds-of-funds managed by Columbia Management Investment Advisers, LLC (the Investment Manager). As a result of asset allocation decisions by the Investment Manager, it is possible that the Fund may experience relatively large purchases or redemptions from affiliated funds-of-funds. The Investment Manager seeks to minimize the impact of these transactions by structuring them over a reasonable period of time. The Fund may also experience increased expenses as it buys and sells securities as a result of purchases or redemptions by affiliated funds-of-funds.
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned 7.30% excluding sales charges. The Fund underperformed its benchmark, the S&P 500 Index, which returned 8.19% for the same time period. Management fees, which the Fund pays but the benchmark does not, generally accounted for the modest shortfall between the Fund and the benchmark.
Global uncertainty cut into strong stock market gains, solid economic growth
Optimism prevailed early in 2019, buoyed by solid economic growth and a recovery from meaningful stock market losses in 2018. Strong job gains drove the unemployment rate down to 3.5%, annualized. Consumer spending and export trade supported U.S. economic growth. However, the pace of growth slowed to an estimated 2.1% for the year. In Europe, economic growth slowed as trade tensions and uncertainty mounted regarding Brexit (the U.K.’s departure from the European Union), which was finally resolved late in the year. At the same time, emerging markets came under pressure, driven by trade and tariff concerns. China’s economic conditions weakened and the spread of the coronavirus introduced enough global uncertainty to drive stock markets around the world down sharply in the final week of the period, raising concerns about the impact on global economic growth going forward.
Against this backdrop, the S&P 500 Index returned 8.19% for the 12-month period, giving up substantial gains during the last few trading days of February. The Bloomberg Barclays U.S. Aggregate Bond Index gained 11.68%, as the yield on the 10-year U.S. Treasury fell to 1.10%. (Bond yields and prices move in opposite directions.)
Contributors and detractors
The Fund’s gains were driven by stock selection in the industrials, materials and technology sectors. Within industrials, shares of L3 Harris Technologies, Inc. and Northrup Grumman Corp. rose on the trend to higher defense spending in an environment of geopolitical uncertainty. Both delivered on anticipated synergies from recently completed acquisitions. Northrup marked a near-term inflection point in organic growth, while also reporting strong margins and an impressive backlog. Ingersoll-Rand PLC was another strong contributor to Fund gains. The company’s end markets have grown and it has gained market share in its heating, ventilation and air conditioning (HVAC) businesses. Investors responded favorably to Ingersoll-Rand’s spinoff of its industrial business, which has made the company’s prospects less cyclical. We sold the Fund’s position in Ingersoll-Rand, taking profits.
In the materials sector, a position in Barrick Gold Corp., the world’s largest gold mining company, made a solid contribution to Fund gains as investors bid up the price of gold against a backdrop of heightened political and economic uncertainty. Investors also responded favorably to Barrick’s joint venture with Newmont Goldcorp to establish Nevada Gold Mines, a move that may potentially deliver synergies to both companies.
In the technology sector, MasterCard, Inc. was a standout performer. The company continued to accelerate across all metrics, beating earnings expectations as consumers continued to move away from cash and checks. Microsoft Corp. shares continued to rise as the company continued to transition from a sleepy software company to products and services that generate recurring revenue, including its cloud-based Azure and Office 365. Microsoft, which has a AAA rated balance sheet, exceeded revenue and earnings expectations and offered a solid outlook. Semiconductor equipment manufacturer NVIDIA Corp. delivered a solid gain, with notable strength in both its data center and gaming divisions.
The consumer discretionary and health care sectors delivered some major disappointments for the year. Within the consumer discretionary sector, specialty retailer Tapestry, Inc. lost ground as the company struggled with the integration of Kate Spade & Company. Tariff concerns also weighed on the company. Ultimately, we felt that the company’s execution differed from our
Columbia Select Large Cap Equity Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
original thesis for Tapestry and we sold the stock. Canada Goose Holdings, Inc., a top outerwear and leisurewear company, which had been a solid performer in 2018, missed on the market’s high expectations in 2019. Growth decelerated and we sold Canada Goose during the year.
In the health care sector, Pfizer, Inc., Johnson & Johnson and Biogen, Inc. detracted from results. Pfizer sold off after it announced its intention to merge its Upjohn division with Mylan N.V. While the intention to focus more on innovative pharma makes sense, we were not comfortable with the ensuing balance sheet and valuation of the remaining business and sold the stock. Johnson & Johnson was hurt by negative news flow surrounding its talc multidistrict litigation as well as possible opioid liability. Biogen sold off on poor results for its Alzheimer’s drug, a big blow for the company. We sold Johnson & Johnson and Biogen.
At period’s end
We expect market volatility to remain elevated with a presidential election near year end. Geopolitical uncertainty remains high with the spread of the coronavirus and its implications for economic dislocation. Against this backdrop, we continue to aim to deliver long-term capital growth by focusing mainly on individual stock selection. We emphasize companies that have strong free cash flow generation potential, improving revenue and earnings trends, high or rising returns on invested capital and sound or improving balance sheets. Especially during periods of volatility, we believe this combination of characteristics has the potential to serve our shareholders well.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Growth securities, at times, may not perform as well as value securities or the stock market in general and may be out of favor with investors. Value securities may be unprofitable if the market fails to recognize their intrinsic worth or the portfolio manager misgauged that worth. Foreign investments subject the Fund to risks, including political, economic, market, social and others within a particular country, as well as to currency instabilities and less stringent financial and accounting standards generally applicable to U.S. issuers. Investments in a limited number of companies or sectors subject the Fund to greater risk of loss. The Fund may invest significantly in issuers within a particular sector, which may be negatively affected by market, economic or other conditions, making the Fund more vulnerable to unfavorable developments in the sector. Investing in derivatives is a specialized activity that involves special risks, which may result in significant losses. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,030.00 1,020.89 4.04 4.02 0.80
Advisor Class 1,000.00 1,000.00 1,031.70 1,022.13 2.78 2.77 0.55
Class C 1,000.00 1,000.00 1,026.20 1,017.16 7.81 7.77 1.55
Institutional Class 1,000.00 1,000.00 1,031.60 1,022.13 2.78 2.77 0.55
Institutional 2 Class 1,000.00 1,000.00 1,031.20 1,022.58 2.32 2.31 0.46
Institutional 3 Class 1,000.00 1,000.00 1,032.40 1,022.77 2.12 2.11 0.42
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 99.0%
Issuer Shares Value ($)
Communication Services 12.8%
Entertainment 3.0%
Electronic Arts, Inc.(a) 81,636 8,275,441
Walt Disney Co. (The) 102,706 12,083,361
Total   20,358,802
Interactive Media & Services 4.7%
Alphabet, Inc., Class C(a) 23,821 31,904,180
Media 3.7%
Comcast Corp., Class A 334,416 13,520,439
Discovery, Inc., Class A(a) 314,654 8,086,608
DISH Network Corp., Class A(a) 105,883 3,549,198
Total   25,156,245
Wireless Telecommunication Services 1.4%
T-Mobile U.S.A., Inc.(a) 106,021 9,558,853
Total Communication Services 86,978,080
Consumer Discretionary 9.2%
Automobiles 1.2%
General Motors Co. 266,130 8,116,965
Internet & Direct Marketing Retail 4.5%
Amazon.com, Inc.(a) 16,364 30,825,685
Multiline Retail 1.3%
Target Corp. 84,993 8,754,279
Specialty Retail 2.2%
Home Depot, Inc. (The) 68,759 14,978,461
Total Consumer Discretionary 62,675,390
Consumer Staples 6.1%
Beverages 1.7%
PepsiCo, Inc. 90,301 11,922,441
Food Products 1.4%
Mondelez International, Inc., Class A 175,124 9,246,547
Household Products 1.3%
Kimberly-Clark Corp. 66,314 8,699,734
Tobacco 1.7%
Philip Morris International, Inc. 137,726 11,275,628
Total Consumer Staples 41,144,350
Common Stocks (continued)
Issuer Shares Value ($)
Energy 2.5%
Oil, Gas & Consumable Fuels 2.5%
Chevron Corp. 130,983 12,225,953
EOG Resources, Inc. 73,012 4,618,739
Total   16,844,692
Total Energy 16,844,692
Financials 10.7%
Banks 8.1%
Bank of America Corp. 493,144 14,054,604
Citigroup, Inc. 174,458 11,071,105
JPMorgan Chase & Co. 149,280 17,332,901
KeyCorp 477,993 7,815,185
Popular, Inc. 92,387 4,432,728
Total   54,706,523
Insurance 2.6%
Allstate Corp. (The) 99,967 10,521,527
Lincoln National Corp. 159,903 7,257,997
Total   17,779,524
Total Financials 72,486,047
Health Care 13.5%
Biotechnology 2.6%
Alexion Pharmaceuticals, Inc.(a) 41,095 3,864,163
BioMarin Pharmaceutical, Inc.(a) 53,460 4,831,180
Exact Sciences Corp.(a) 43,081 3,487,407
Vertex Pharmaceuticals, Inc.(a) 22,748 5,096,234
Total   17,278,984
Health Care Equipment & Supplies 6.4%
Abbott Laboratories 170,318 13,119,595
Baxter International, Inc. 128,295 10,708,784
Dentsply Sirona, Inc. 135,543 6,674,137
Medtronic PLC 130,416 13,128,979
Total   43,631,495
Health Care Providers & Services 1.6%
Cigna Corp. 60,983 11,156,230
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Pharmaceuticals 2.9%
Bristol-Myers Squibb Co. 121,758 7,191,028
Eli Lilly & Co. 97,317 12,274,593
Total   19,465,621
Total Health Care 91,532,330
Industrials 9.6%
Aerospace & Defense 2.7%
L3 Harris Technologies, Inc. 41,247 8,155,769
Northrop Grumman Corp. 31,838 10,469,608
Total   18,625,377
Building Products 1.3%
Masco Corp. 211,669 8,746,163
Machinery 2.9%
Stanley Black & Decker, Inc. 64,234 9,230,426
Trane Technologies PLC 79,200 10,219,968
Total   19,450,394
Road & Rail 2.7%
Norfolk Southern Corp. 46,176 8,420,193
Union Pacific Corp. 63,202 10,100,312
Total   18,520,505
Total Industrials 65,342,439
Information Technology 25.9%
Communications Equipment 1.9%
Cisco Systems, Inc. 327,995 13,096,840
IT Services 6.0%
Fidelity National Information Services, Inc. 84,479 11,803,406
International Business Machines Corp. 91,115 11,858,617
MasterCard, Inc., Class A 59,318 17,217,049
Total   40,879,072
Semiconductors & Semiconductor Equipment 5.1%
Broadcom, Inc. 46,599 12,703,819
NVIDIA Corp. 31,438 8,490,461
NXP Semiconductors NV 75,798 8,617,475
Qorvo, Inc.(a) 49,178 4,946,323
Total   34,758,078
Common Stocks (continued)
Issuer Shares Value ($)
Software 9.5%
Adobe, Inc.(a) 41,393 14,285,552
Microsoft Corp. 254,772 41,275,612
Symantec Corp. 445,527 8,478,379
Total   64,039,543
Technology Hardware, Storage & Peripherals 3.4%
Apple, Inc.(b) 82,727 22,614,253
Total Information Technology 175,387,786
Materials 1.2%
Metals & Mining 1.2%
Barrick Gold Corp. 419,545 7,988,137
Total Materials 7,988,137
Real Estate 3.5%
Equity Real Estate Investment Trusts (REITS) 3.5%
American Tower Corp. 41,079 9,316,717
Medical Properties Trust, Inc. 298,745 6,312,482
ProLogis, Inc. 98,713 8,319,532
Total   23,948,731
Total Real Estate 23,948,731
Utilities 4.0%
Electric Utilities 2.7%
American Electric Power Co., Inc. 107,892 9,630,440
Xcel Energy, Inc. 133,780 8,337,170
Total   17,967,610
Multi-Utilities 1.3%
Ameren Corp. 112,702 8,903,458
Total Utilities 26,871,068
Total Common Stocks
(Cost $501,390,143)
671,199,050
Money Market Funds 0.9%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(c),(d) 6,034,636 6,034,636
Total Money Market Funds
(Cost $6,034,053)
6,034,636
Total Investments in Securities
(Cost: $507,424,196)
677,233,686
Other Assets & Liabilities, Net   529,372
Net Assets 677,763,058
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
At February 29, 2020, securities and/or cash totaling $414,140 were pledged as collateral.
Investments in derivatives
Long futures contracts
Description Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
S&P 500 Index E-mini 37 03/2020 USD 5,459,535 (461,617)
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) This security or a portion of this security has been pledged as collateral in connection with derivative contracts.
(c) The rate shown is the seven-day current annualized yield at February 29, 2020.
(d) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  12,897,378 159,758,222 (166,620,964) 6,034,636 (756) 583 306,669 6,034,636
Currency Legend
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 86,978,080 86,978,080
Consumer Discretionary 62,675,390 62,675,390
Consumer Staples 41,144,350 41,144,350
Energy 16,844,692 16,844,692
Financials 72,486,047 72,486,047
Health Care 91,532,330 91,532,330
Industrials 65,342,439 65,342,439
Information Technology 175,387,786 175,387,786
Materials 7,988,137 7,988,137
Real Estate 23,948,731 23,948,731
Utilities 26,871,068 26,871,068
Total Common Stocks 671,199,050 671,199,050
Money Market Funds 6,034,636 6,034,636
Total Investments in Securities 677,233,686 677,233,686
Investments in Derivatives        
Liability        
Futures Contracts (461,617) (461,617)
Total 676,772,069 676,772,069
See the Portfolio of Investments for all investment classifications not indicated in the table.
Derivative instruments are valued at unrealized appreciation (depreciation).
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
11

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $501,390,143) $671,199,050
Affiliated issuers (cost $6,034,053) 6,034,636
Receivable for:  
Capital shares sold 296,762
Dividends 982,672
Foreign tax reclaims 2,937
Expense reimbursement due from Investment Manager 6,720
Prepaid expenses 2,067
Total assets 678,524,844
Liabilities  
Payable for:  
Capital shares purchased 507,641
Variation margin for futures contracts 10,730
Management services fees 14,126
Distribution and/or service fees 1,238
Transfer agent fees 36,602
Compensation of board members 148,549
Compensation of chief compliance officer 4
Other expenses 42,896
Total liabilities 761,786
Net assets applicable to outstanding capital stock $677,763,058
Represented by  
Paid in capital 481,673,204
Total distributable earnings (loss) 196,089,854
Total - representing net assets applicable to outstanding capital stock $677,763,058
Class A  
Net assets $155,698,675
Shares outstanding 10,952,584
Net asset value per share $14.22
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $15.09
Advisor Class  
Net assets $3,294,211
Shares outstanding 234,700
Net asset value per share $14.04
Class C  
Net assets $6,039,537
Shares outstanding 467,365
Net asset value per share $12.92
Institutional Class  
Net assets $125,623,297
Shares outstanding 8,911,773
Net asset value per share $14.10
Institutional 2 Class  
Net assets $22,675,742
Shares outstanding 1,558,146
Net asset value per share $14.55
Institutional 3 Class  
Net assets $364,431,596
Shares outstanding 26,262,407
Net asset value per share $13.88
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $17,151,738
Dividends — affiliated issuers 306,669
Interfund lending 13
Foreign taxes withheld (79,409)
Total income 17,379,011
Expenses:  
Management services fees 5,442,592
Distribution and/or service fees  
Class A 402,485
Class C 70,522
Transfer agent fees  
Class A 229,298
Advisor Class 5,492
Class C 10,042
Institutional Class 231,149
Institutional 2 Class 15,168
Institutional 3 Class 27,222
Compensation of board members 38,004
Custodian fees 9,907
Printing and postage fees 30,165
Registration fees 85,203
Audit fees 28,738
Legal fees 13,977
Compensation of chief compliance officer 152
Other 17,524
Total expenses 6,657,640
Fees waived or expenses reimbursed by Investment Manager and its affiliates (2,717,031)
Expense reduction (1,277)
Total net expenses 3,939,332
Net investment income 13,439,679
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 30,806,770
Investments — affiliated issuers (756)
Foreign currency translations 1,308
Futures contracts 3,285,339
Options purchased (144,155)
Net realized gain 33,948,506
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers 8,403,217
Investments — affiliated issuers 583
Futures contracts (1,550,089)
Net change in unrealized appreciation (depreciation) 6,853,711
Net realized and unrealized gain 40,802,217
Net increase in net assets resulting from operations $54,241,896
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
13

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $13,439,679 $8,768,891
Net realized gain 33,948,506 45,818,322
Net change in unrealized appreciation (depreciation) 6,853,711 (28,265,706)
Net increase in net assets resulting from operations 54,241,896 26,321,507
Distributions to shareholders    
Net investment income and net realized gains    
Class A (8,128,738) (13,958,703)
Advisor Class (211,295) (139,047)
Class C (331,874) (716,858)
Institutional Class (8,874,648) (15,805,690)
Institutional 2 Class (1,276,966) (421,522)
Institutional 3 Class (20,084,460) (32,264,321)
Class T (258)
Total distributions to shareholders (38,907,981) (63,306,399)
Increase (decrease) in net assets from capital stock activity (18,482,795) 48,484,123
Total increase (decrease) in net assets (3,148,880) 11,499,231
Net assets at beginning of year 680,911,938 669,412,707
Net assets at end of year $677,763,058 $680,911,938
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 1,117,225 16,161,538 1,722,849 24,297,972
Distributions reinvested 193,648 2,772,344 327,491 4,539,237
Redemptions (1,231,202) (18,070,781) (1,267,527) (18,043,220)
Net increase 79,671 863,101 782,813 10,793,989
Advisor Class        
Subscriptions 103,618 1,483,868 362,240 5,115,795
Distributions reinvested 14,912 211,152 10,342 138,788
Redemptions (111,845) (1,662,976) (160,927) (2,350,125)
Net increase 6,685 32,044 211,655 2,904,458
Class C        
Subscriptions 96,991 1,277,788 238,221 2,999,930
Distributions reinvested 22,225 288,516 50,872 648,448
Redemptions (262,590) (3,453,111) (279,518) (3,687,068)
Net increase (decrease) (143,374) (1,886,807) 9,575 (38,690)
Institutional Class        
Subscriptions 1,617,438 22,932,594 1,060,395 14,613,282
Distributions reinvested 449,621 6,390,254 751,916 10,340,006
Redemptions (4,574,789) (68,579,665) (1,977,365) (27,630,441)
Net decrease (2,507,730) (39,256,817) (165,054) (2,677,153)
Institutional 2 Class        
Subscriptions 505,441 7,507,267 1,215,011 16,522,712
Distributions reinvested 87,065 1,276,817 29,817 421,257
Redemptions (399,153) (5,986,153) (593,073) (8,837,909)
Net increase 193,353 2,797,931 651,755 8,106,060
Institutional 3 Class        
Subscriptions 4,413,726 64,981,120 5,053,174 72,022,667
Distributions reinvested 1,241,280 17,368,334 2,236,881 30,308,418
Redemptions (4,384,530) (63,381,701) (5,060,529) (72,933,175)
Net increase 1,270,476 18,967,753 2,229,526 29,397,910
Class T        
Redemptions (189) (2,451)
Net decrease (189) (2,451)
Total net increase (decrease) (1,100,919) (18,482,795) 3,720,081 48,484,123
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
15

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $13.95 0.24 0.77 1.01 (0.12) (0.62) (0.74)
Year Ended 2/28/2019 $14.82 0.16 0.33 0.49 (0.14) (1.22) (1.36)
Year Ended 2/28/2018 $13.16 0.09 2.36 2.45 (0.08) (0.71) (0.79)
Year Ended 2/28/2017 $10.85 0.12 2.43 2.55 (0.12) (0.12) (0.24)
Year Ended 2/29/2016 $12.86 0.05 (0.62) (0.57) (0.20) (1.24) (1.44)
Advisor Class
Year Ended 2/29/2020 $13.78 0.26 0.78 1.04 (0.16) (0.62) (0.78)
Year Ended 2/28/2019 $14.66 0.20 0.33 0.53 (0.19) (1.22) (1.41)
Year Ended 2/28/2018(f) $13.61 0.11 1.63 1.74 (0.10) (0.59) (0.69)
Class C
Year Ended 2/29/2020 $12.74 0.11 0.71 0.82 (0.02) (0.62) (0.64)
Year Ended 2/28/2019 $13.64 0.05 0.31 0.36 (0.04) (1.22) (1.26)
Year Ended 2/28/2018 $12.18 (0.02) 2.19 2.17 (0.71) (0.71)
Year Ended 2/28/2017 $10.07 0.03 2.24 2.27 (0.04) (0.12) (0.16)
Year Ended 2/29/2016 $12.04 (0.04) (0.57) (0.61) (0.12) (1.24) (1.36)
Institutional Class
Year Ended 2/29/2020 $13.84 0.26 0.78 1.04 (0.16) (0.62) (0.78)
Year Ended 2/28/2019 $14.71 0.19 0.34 0.53 (0.18) (1.22) (1.40)
Year Ended 2/28/2018 $13.06 0.12 2.35 2.47 (0.11) (0.71) (0.82)
Year Ended 2/28/2017 $10.78 0.15 2.40 2.55 (0.15) (0.12) (0.27)
Year Ended 2/29/2016 $12.78 0.07 (0.60) (0.53) (0.23) (1.24) (1.47)
Institutional 2 Class
Year Ended 2/29/2020 $14.26 0.29 0.79 1.08 (0.17) (0.62) (0.79)
Year Ended 2/28/2019 $15.11 0.22 0.34 0.56 (0.19) (1.22) (1.41)
Year Ended 2/28/2018 $13.41 0.13 2.40 2.53 (0.12) (0.71) (0.83)
Year Ended 2/28/2017 $11.05 0.15 2.49 2.64 (0.16) (0.12) (0.28)
Year Ended 2/29/2016 $13.07 0.06 (0.60) (0.54) (0.24) (1.24) (1.48)
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Financial Highlights  (continued)
  Proceeds from
regulatory
settlements
Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $14.22 7.30% 1.18% 0.80%(c) 1.63% 46% $155,699
Year Ended 2/28/2019 $13.95 3.61% 1.19% 0.80%(c) 1.10% 62% $151,703
Year Ended 2/28/2018 $14.82 18.87% 1.19% 1.13%(c) 0.61% 45% $149,489
Year Ended 2/28/2017 $13.16 23.66% 1.22% 1.17%(c) 0.98% 67% $136,584
Year Ended 2/29/2016 0.00(d) $10.85 (5.38%)(e) 1.25% 1.18%(c) 0.41% 102% $119,928
Advisor Class
Year Ended 2/29/2020 $14.04 7.58% 0.93% 0.55%(c) 1.81% 46% $3,294
Year Ended 2/28/2019 $13.78 3.88% 0.94% 0.55%(c) 1.45% 62% $3,143
Year Ended 2/28/2018(f) $14.66 12.96% 0.97%(g) 0.69%(c),(g) 1.17%(g) 45% $240
Class C
Year Ended 2/29/2020 $12.92 6.45% 1.93% 1.55%(c) 0.83% 46% $6,040
Year Ended 2/28/2019 $12.74 2.85% 1.94% 1.55%(c) 0.34% 62% $7,783
Year Ended 2/28/2018 $13.64 18.03% 1.94% 1.87%(c) (0.15%) 45% $8,199
Year Ended 2/28/2017 $12.18 22.66% 1.97% 1.92%(c) 0.23% 67% $5,692
Year Ended 2/29/2016 0.00(d) $10.07 (6.05%)(e) 2.00% 1.93%(c) (0.35%) 102% $4,739
Institutional Class
Year Ended 2/29/2020 $14.10 7.54% 0.93% 0.55%(c) 1.76% 46% $125,623
Year Ended 2/28/2019 $13.84 3.90% 0.94% 0.55%(c) 1.34% 62% $158,057
Year Ended 2/28/2018 $14.71 19.21% 0.94% 0.88%(c) 0.86% 45% $170,394
Year Ended 2/28/2017 $13.06 23.83% 0.97% 0.92%(c) 1.23% 67% $159,193
Year Ended 2/29/2016 0.00(d) $10.78 (5.09%)(e) 1.00% 0.93%(c) 0.55% 102% $149,765
Institutional 2 Class
Year Ended 2/29/2020 $14.55 7.61% 0.85% 0.46% 1.97% 46% $22,676
Year Ended 2/28/2019 $14.26 4.01% 0.84% 0.46% 1.53% 62% $19,466
Year Ended 2/28/2018 $15.11 19.15% 0.86% 0.80% 0.90% 45% $10,777
Year Ended 2/28/2017 $13.41 24.09% 0.86% 0.83% 1.21% 67% $269
Year Ended 2/29/2016 0.00(d) $11.05 (5.05%)(e) 0.86% 0.84% 0.47% 102% $153
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
17

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Institutional 3 Class
Year Ended 2/29/2020 $13.63 0.29 0.76 1.05 (0.18) (0.62) (0.80)
Year Ended 2/28/2019 $14.51 0.21 0.33 0.54 (0.20) (1.22) (1.42)
Year Ended 2/28/2018(h) $13.08 0.14 2.13 2.27 (0.13) (0.71) (0.84)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) The benefits derived from expense reductions had an impact of less than 0.01%.
(d) Rounds to zero.
(e) The Fund received proceeds from regulatory settlements. Had the Fund not received these proceeds, the total return would have been lower by 0.07%.
(f) Advisor Class shares commenced operations on July 5, 2017. Per share data and total return reflect activity from that date.
(g) Annualized.
(h) Institutional 3 Class shares commenced operations on March 1, 2017. Per share data and total return reflect activity from that date.
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Financial Highlights  (continued)
  Proceeds from
regulatory
settlements
Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Institutional 3 Class
Year Ended 2/29/2020 $13.88 7.72% 0.80% 0.42% 2.04% 46% $364,432
Year Ended 2/28/2019 $13.63 4.02% 0.80% 0.43% 1.48% 62% $340,760
Year Ended 2/28/2018(h) $14.51 17.63% 0.81% 0.76% 0.98% 45% $330,311
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
19

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Select Large Cap Equity Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
20 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of transactions, at the mean of the latest quoted bid and ask prices.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Foreign currency transactions and translations
The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.
For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
21

Notes to Financial Statements  (continued)
February 29, 2020
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Futures contracts
Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to maintain appropriate equity market exposure while keeping sufficient cash to accommodate daily redemptions. These instruments may be used for other purposes in future periods. Upon entering into futures contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.
Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.
22 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Options contracts
Options are contracts which entitle the holder to purchase or sell securities or other identified assets at a specified price, or in the case of index option contracts, to receive or pay the difference between the index value and the strike price of the index option contract. Option contracts can be either exchange-traded or over-the-counter. The Fund purchased option contracts to decrease the Fund’s exposure to equity market risk and to increase return on investments. These instruments may be used for other purposes in future periods. Completion of transactions for option contracts traded in the over-the-counter market depends upon the performance of the other party. Cash collateral may be collected or posted by the Fund to secure certain over-the-counter option contract trades. Cash collateral held or posted by the Fund for such option contract trades must be returned to the broker or the Fund upon closure, exercise or expiration of the contract.
Options contracts purchased are recorded as investments. When the Fund writes an options contract, the premium received is recorded as an asset and an amount equivalent to the premium is recorded as a liability in the Statement of Assets and Liabilities and is subsequently adjusted to reflect the current fair value of the option written. Changes in the fair value of the written option are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund will realize a gain or loss when the option contract is closed or expires. When option contracts are exercised, the proceeds on sales for a written call or purchased put option contract, or the purchase cost for a written put or purchased call option contract, is adjusted by the amount of premium received or paid.
For over-the-counter options purchased, the Fund bears the risk of loss of the amount of the premiums paid plus the positive change in market values net of any collateral held by the Fund should the counterparty fail to perform under the contracts. Option contracts written by the Fund do not typically give rise to significant counterparty credit risk, as options written generally obligate the Fund and not the counterparty to perform. The risk in writing a call option contract is that the Fund gives up the opportunity for profit if the market price of the security increases above the strike price and the option contract is exercised. The risk in writing a put option contract is that the Fund may incur a loss if the market price of the security decreases below the strike price and the option contract is exercised. Exercise of a written option could result in the Fund purchasing or selling a security or foreign currency when it otherwise would not, or at a price different from the current market value. In purchasing and writing options, the Fund bears the risk of an unfavorable change in the value of the underlying instrument or the risk that the Fund may not be able to enter into a closing transaction due to an illiquid market.
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Equity risk Component of total distributable earnings (loss) — unrealized depreciation on futures contracts 461,617*
    
* Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin is reported in receivables or payables in the Statement of Assets and Liabilities.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Options
contracts
purchased
($)
Total
($)
Equity risk 3,285,339 (144,155) 3,141,184
    
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk (1,550,089)
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average notional
amounts ($)*
Futures contracts — long 12,837,933
    
Derivative instrument Average
value ($)**
Options contracts — purchased 795
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
** Based on the ending daily outstanding amounts for the year ended February 29, 2020.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
24 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.77% to 0.57% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.76% of the Fund’s average daily net assets.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.14
Advisor Class 0.14
Class C 0.14
Institutional Class 0.14
Institutional 2 Class 0.06
Institutional 3 Class 0.01
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $1,277.
26 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rate of 0.75% of the average daily net assets attributable to Class C shares of the Fund.
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 65,256
Class C 1.00(b) 419
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 0.80% 0.80%
Advisor Class 0.55 0.55
Class C 1.55 1.55
Institutional Class 0.55 0.55
Institutional 2 Class 0.46 0.49
Institutional 3 Class 0.42 0.43
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, re-characterization of distributions for investments, and foreign currency transactions. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Undistributed net
investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
(6,063) 6,062 1
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
7,960,854 30,947,127 38,907,981 10,865,951 52,440,448 63,306,399
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
6,901,250 19,909,973 169,425,871
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
507,346,198 194,228,470 (24,802,599) 169,425,871
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $322,204,722 and $357,138,916, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
28 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Lender 200,000 2.29 1
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Information technology sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the information technology sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the information technology sectors are subject to certain risks, including the risk that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. Performance of such companies may be affected by factors including obtaining and protecting patents (or the failure to do so) and significant competitive pressures, including aggressive pricing of their products or services, new market entrants, competition for market share and short product cycles due to an accelerated rate of technological developments. Such competitive pressures may lead to limited earnings and/or falling profit
Columbia Select Large Cap Equity Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
margins. As a result, the value of their securities may fall or fail to rise. In addition, many information technology sector companies have limited operating histories and prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 28.0% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 47.0% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
30 Columbia Select Large Cap Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
31

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Select Large Cap Equity Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Select Large Cap Equity Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
32 Columbia Select Large Cap Equity Fund  | Annual Report 2020

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
100.00% 100.00% $30,301,764
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Columbia Select Large Cap Equity Fund  | Annual Report 2020
33

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
34 Columbia Select Large Cap Equity Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Select Large Cap Equity Fund  | Annual Report 2020
35

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
36 Columbia Select Large Cap Equity Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Select Large Cap Equity Fund  | Annual Report 2020
37

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Columbia Select Large Cap Equity Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN172_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Large Cap Index Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Large Cap Index Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Large Cap Index Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks total return before fees and expenses that corresponds to the total return of the Standard & Poor’s (S&P) 500 Index.
Portfolio management
Christopher Lo, CFA
Lead Portfolio Manager
Managed Fund since 2014
Vadim Shteyn
Portfolio Manager
Managed Fund since 2011
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A 10/10/95 7.70 8.74 12.16
Institutional Class 12/15/93 7.97 9.02 12.44
Institutional 2 Class* 11/08/12 7.97 9.02 12.44
Institutional 3 Class* 03/01/17 7.99 9.03 12.45
S&P 500 Index   8.19 9.23 12.65
All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The S&P 500 Index, an unmanaged index, measures the performance of 500 widely held, large-capitalization U.S. stocks and is frequently used as a general measure of market performance.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Large Cap Index Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Large Cap Index Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 99.0
Money Market Funds 1.0
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 10.7
Consumer Discretionary 9.9
Consumer Staples 7.2
Energy 3.6
Financials 12.2
Health Care 14.0
Industrials 8.9
Information Technology 24.4
Materials 2.5
Real Estate 3.1
Utilities 3.5
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Large Cap Index Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned 7.70%. The Fund closely tracked its benchmark, the unmanaged S&P 500 Index, which returned 8.19% for the same period. Mutual funds, unlike unmanaged indices, incur operating expenses.
U.S. equity markets posted divergent results amid extreme volatility
The 12 months that ended February 29, 2020 proved to be volatile for U.S. equities. The annual period began with mixed results, as large-cap stocks wobbled modestly higher, while mid-cap and small-cap companies posted negative absolute returns on fears that economic growth was potentially slowing and the impact of U.S.-China trade headlines might be greater than the U.S. Administration was stating. Through the second quarter of 2019, large-cap stocks continued to better weather the “risk off” sentiment, or heightened risk aversion, that dominated these months, as did growth stocks across the capitalization spectrum. Speculation around the market’s hoped-for interest rate cuts from the U.S. Federal Reserve (Fed) contributed to frequent swings in investor optimism.
Day-to-day sentiment about the state of U.S.-China trade relations remained a major factor influencing the U.S. equity markets going into the second half of 2019. Also adding to the list of worries were U.S. recession fears based on weak manufacturing data, uncertainties about global economic growth, several geopolitical hotspots, domestic political turmoil around the impeachment of the U.S. President and the then-diverse and differentiated Democratic presidential candidate campaigns. Toward the end of 2019, however, investor optimism soared. Hopeful expectations surrounding a “Phase 1” trade deal between the U.S. and China, an accommodative Fed and the seemingly persistent resilience of the American consumer led the S&P 500 Index to its best fourth quarter since 2013. Mid-cap and small-cap stocks lagged their large-cap counterparts but also posted a strong fourth calendar quarter.
The optimism seen at the end of the 2019 calendar year continued into the start of the new decade but was derailed quickly by the outbreak of the highly contagious and novel coronavirus first identified in Wuhan, Hubei province in China. As the impact of the virus became more pronounced and fears of a severe pandemic that could cause a global recession grew, markets around the world, including the U.S., sold off dramatically. The S&P 500 Index lost almost 11.5% in the last week of February 2020 alone, its biggest weekly decline since October 2008. Mid-cap and small-cap companies struggled similarly.
Still, even with the sharp decline in February 2020, the S&P 500 Index ended the annual period up 8.19%. However, amid heightened volatility and risk aversion, mid-cap and small-cap stocks significantly underperformed large-cap stocks, with the S&P Mid Cap 400 Index and the S&P Small Cap 600 Index posting returns of -3.39% and -7.68%, respectively, for the same annual period.
S&P 500 Index saw greatest gains in information technology sector
Eight of the eleven sectors of the S&P 500 Index posted a positive return during the 12 months that ended February 29, 2020. In terms of total return, information technology was the best relative performer by some distance, followed by the utilities and communication services sectors. On the basis of impact, which takes weighting and total returns into account, information technology, communication services and consumer staples were the best relative performers. The top performing industries for the annual period on the basis of total return were technology hardware, storage and peripherals; software; health care technology; water utilities; and semiconductors and semiconductor equipment.
Conversely, energy, materials and industrials were weakest from both a total return perspective and on the basis of impact. The worst performing industries for the annual period on the basis of total return were energy equipment and services; oil, gas and consumable fuels; leisure products; airlines; and automobiles.
Top individual contributors within the S&P 500 Index during the annual period included information technology giants Apple, Inc. and Microsoft Corp.; e-commerce retailing behemoth Amazon.com, Inc.; social media leader Facebook, Inc.; and semiconductor producer NVIDIA Corp. Top detractors were integrated oil companies Exxon Mobil Corp. and Chevron Corp.; aerospace and defense company Boeing Co.; pharmaceuticals company Pfizer, Inc.; and technology hardware company Cisco Systems, Inc.
Columbia Large Cap Index Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
Information technology was the largest sector by weighting in the S&P 500 Index as of February 29, 2020, with a weighting of 24.42%. As always, each sector and stock in the S&P 500 Index was represented in the Fund with approximately the same weighting as in the Index and therefore had a similar effect.
Index additions and deletions drove Fund portfolio changes
During the annual period, there were 28 additions and 28 deletions to the Index and the Fund’s portfolio. Among those stocks added to the Index and Fund were Fox Corp., Dow, Inc., MarketAxess Holdings, Inc., T-Mobile U.S.A., Inc., Las Vegas Sands Corp., ServiceNow, Inc., WR Berkley Corp., Old Dominion Freight Line, Inc., Live Nation Entertainment, Inc. and Zebra Technologies Corp. Deletions included Anadarko Petroleum Corp., Brighthouse Financial, Inc., Celgene Corp., Foot Locker, Inc., Fluor Corp., L3 Technologies, Inc., Mattel, Inc., Nektar Therapeutics, SunTrust Banks, Inc. and TripAdvisor, Inc.
We do not anticipate any changes in the portfolio beyond the customary quarterly rebalancings and stock substitutions we make to align the Fund with the S&P 500 Index.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Investing in derivatives is a specialized activity that involves special risks, which may result in significant losses. The Fund’s net value will generally decline when the performance of its targeted index declines. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Large Cap Index Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,016.90 1,022.63 2.26 2.26 0.45
Institutional Class 1,000.00 1,000.00 1,018.20 1,023.87 1.00 1.01 0.20
Institutional 2 Class 1,000.00 1,000.00 1,018.10 1,023.87 1.00 1.01 0.20
Institutional 3 Class 1,000.00 1,000.00 1,018.10 1,023.87 1.00 1.01 0.20
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Large Cap Index Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 99.2%
Issuer Shares Value ($)
Communication Services 10.6%
Diversified Telecommunication Services 2.0%
AT&T, Inc. 911,582 32,105,918
CenturyLink, Inc. 122,441 1,477,863
Verizon Communications, Inc. 516,093 27,951,597
Total   61,535,378
Entertainment 1.9%
Activision Blizzard, Inc. 95,870 5,572,923
Electronic Arts, Inc.(a) 36,432 3,693,112
Live Nation Entertainment, Inc.(a) 17,580 1,068,337
Netflix, Inc.(a) 54,687 20,181,144
Take-Two Interactive Software, Inc.(a) 14,122 1,517,832
Walt Disney Co. (The) 224,915 26,461,250
Total   58,494,598
Interactive Media & Services 5.2%
Alphabet, Inc., Class A(a) 37,387 50,070,540
Alphabet, Inc., Class C(a) 37,295 49,950,312
Facebook, Inc., Class A(a) 300,301 57,798,933
Twitter, Inc.(a) 96,879 3,216,383
Total   161,036,168
Media 1.4%
Charter Communications, Inc., Class A(a) 19,566 9,649,364
Comcast Corp., Class A 566,517 22,904,282
Discovery, Inc., Class A(a) 19,736 507,215
Discovery, Inc., Class C(a) 41,856 1,050,586
DISH Network Corp., Class A(a) 31,945 1,070,796
Fox Corp., Class A 44,234 1,359,753
Fox Corp., Class B 20,261 616,948
Interpublic Group of Companies, Inc. (The) 48,381 1,033,418
News Corp., Class A 48,488 585,493
News Corp., Class B 15,198 189,063
Omnicom Group, Inc. 27,170 1,882,338
ViacomCBS, Inc., Class B 67,438 1,659,649
Total   42,508,905
Common Stocks (continued)
Issuer Shares Value ($)
Wireless Telecommunication Services 0.1%
T-Mobile U.S.A., Inc.(a) 39,500 3,561,320
Total Communication Services 327,136,369
Consumer Discretionary 9.8%
Auto Components 0.1%
Aptiv PLC 31,858 2,488,429
BorgWarner, Inc. 25,772 814,395
Total   3,302,824
Automobiles 0.3%
Ford Motor Co. 485,927 3,382,052
General Motors Co. 156,900 4,785,450
Harley-Davidson, Inc. 19,251 586,578
Total   8,754,080
Distributors 0.1%
Genuine Parts Co. 18,128 1,581,487
LKQ Corp.(a) 38,245 1,131,287
Total   2,712,774
Diversified Consumer Services 0.0%
H&R Block, Inc. 24,368 503,687
Hotels, Restaurants & Leisure 1.8%
Carnival Corp. 49,981 1,672,364
Chipotle Mexican Grill, Inc.(a) 3,195 2,471,588
Darden Restaurants, Inc. 15,298 1,491,555
Hilton Worldwide Holdings, Inc. 35,214 3,422,801
Las Vegas Sands Corp. 42,170 2,458,933
Marriott International, Inc., Class A 33,859 4,198,516
McDonald’s Corp. 93,976 18,247,320
MGM Resorts International 64,267 1,578,397
Norwegian Cruise Line Holdings Ltd.(a) 26,553 989,365
Royal Caribbean Cruises Ltd. 21,447 1,724,553
Starbucks Corp. 147,373 11,558,464
Wynn Resorts Ltd. 12,059 1,302,131
Yum! Brands, Inc. 37,747 3,368,920
Total   54,484,907
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Large Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Household Durables 0.4%
D.R. Horton, Inc. 41,844 2,229,030
Garmin Ltd. 18,027 1,593,407
Leggett & Platt, Inc. 16,425 651,416
Lennar Corp., Class A 34,922 2,107,193
Mohawk Industries, Inc.(a) 7,423 899,296
Newell Brands, Inc. 47,552 733,727
NVR, Inc.(a) 430 1,576,887
PulteGroup, Inc. 31,791 1,277,998
Whirlpool Corp. 7,882 1,007,793
Total   12,076,747
Internet & Direct Marketing Retail 3.6%
Amazon.com, Inc.(a) 51,970 97,898,487
Booking Holdings, Inc.(a) 5,222 8,854,737
eBay, Inc. 95,429 3,305,661
Expedia Group, Inc. 17,439 1,719,834
Total   111,778,719
Leisure Products 0.0%
Hasbro, Inc. 15,882 1,226,884
Multiline Retail 0.5%
Dollar General Corp. 31,771 4,775,181
Dollar Tree, Inc.(a) 29,528 2,451,710
Kohl’s Corp. 19,539 764,952
Macy’s, Inc. 38,556 510,096
Nordstrom, Inc. 13,369 463,904
Target Corp. 63,234 6,513,102
Total   15,478,945
Specialty Retail 2.3%
Advance Auto Parts, Inc. 8,647 1,149,878
AutoZone, Inc.(a) 2,977 3,073,782
Best Buy Co., Inc. 28,422 2,150,124
CarMax, Inc.(a) 20,524 1,791,951
Gap, Inc. (The) 26,556 380,548
Home Depot, Inc. (The) 136,123 29,653,034
L Brands, Inc. 28,984 627,794
Lowe’s Companies, Inc. 95,647 10,193,101
O’Reilly Automotive, Inc.(a) 9,438 3,479,979
Ross Stores, Inc. 45,135 4,909,785
Common Stocks (continued)
Issuer Shares Value ($)
Tiffany & Co. 13,471 1,799,591
TJX Companies, Inc. (The) 151,322 9,049,056
Tractor Supply Co. 14,777 1,307,912
Ulta Beauty, Inc.(a) 7,135 1,834,337
Total   71,400,872
Textiles, Apparel & Luxury Goods 0.7%
Capri Holdings Ltd.(a) 18,919 488,489
Hanesbrands, Inc. 45,138 597,627
Nike, Inc., Class B 155,487 13,897,428
PVH Corp. 9,255 685,888
Ralph Lauren Corp. 6,211 655,323
Tapestry, Inc. 34,438 807,571
Under Armour, Inc., Class A(a) 23,485 333,252
Under Armour, Inc., Class C(a) 24,282 303,039
VF Corp. 40,870 2,942,640
Total   20,711,257
Total Consumer Discretionary 302,431,696
Consumer Staples 7.2%
Beverages 1.9%
Brown-Forman Corp., Class B 22,740 1,396,463
Coca-Cola Co. (The) 481,185 25,738,586
Constellation Brands, Inc., Class A 20,897 3,602,225
Molson Coors Beverage Co., Class B 23,439 1,162,809
Monster Beverage Corp.(a) 47,637 2,973,025
PepsiCo, Inc. 174,010 22,974,540
Total   57,847,648
Food & Staples Retailing 1.5%
Costco Wholesale Corp. 55,129 15,498,967
Kroger Co. (The) 100,079 2,815,222
Sysco Corp. 63,670 4,243,605
Walgreens Boots Alliance, Inc. 93,559 4,281,260
Walmart, Inc. 177,026 19,062,160
Total   45,901,214
Food Products 1.1%
Archer-Daniels-Midland Co. 69,471 2,615,583
Campbell Soup Co. 21,076 950,949
ConAgra Foods, Inc. 60,729 1,620,857
General Mills, Inc. 75,423 3,695,727
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Hershey Co. (The) 18,509 2,665,111
Hormel Foods Corp. 34,696 1,443,354
JM Smucker Co. (The) 14,236 1,466,166
Kellogg Co. 31,076 1,879,166
Kraft Heinz Co. (The) 77,719 1,925,100
Lamb Weston Holdings, Inc. 18,223 1,583,396
McCormick & Co., Inc. 15,423 2,254,688
Mondelez International, Inc., Class A 179,675 9,486,840
Tyson Foods, Inc., Class A 36,838 2,498,721
Total   34,085,658
Household Products 1.7%
Church & Dwight Co., Inc. 30,623 2,128,911
Clorox Co. (The) 15,658 2,496,198
Colgate-Palmolive Co. 106,951 7,226,679
Kimberly-Clark Corp. 42,776 5,611,784
Procter & Gamble Co. (The) 311,198 35,236,950
Total   52,700,522
Personal Products 0.2%
Coty, Inc., Class A 36,888 340,476
Estee Lauder Companies, Inc. (The), Class A 27,771 5,098,756
Total   5,439,232
Tobacco 0.8%
Altria Group, Inc. 233,123 9,411,176
Philip Morris International, Inc. 194,159 15,895,797
Total   25,306,973
Total Consumer Staples 221,281,247
Energy 3.5%
Energy Equipment & Services 0.3%
Baker Hughes Co. 81,093 1,304,786
Halliburton Co. 109,544 1,857,866
Helmerich & Payne, Inc. 13,532 499,196
National Oilwell Varco, Inc. 48,146 900,812
Schlumberger Ltd. 172,755 4,679,933
TechnipFMC PLC 52,437 778,165
Total   10,020,758
Common Stocks (continued)
Issuer Shares Value ($)
Oil, Gas & Consumable Fuels 3.2%
Apache Corp. 46,924 1,169,346
Cabot Oil & Gas Corp. 50,906 709,121
Chevron Corp. 235,958 22,024,320
Cimarex Energy Co. 12,709 420,032
Concho Resources, Inc. 25,082 1,706,078
ConocoPhillips Co. 136,925 6,629,908
Devon Energy Corp. 48,289 784,213
Diamondback Energy, Inc. 20,108 1,246,696
EOG Resources, Inc. 72,602 4,592,803
Exxon Mobil Corp.(b) 527,989 27,159,754
Hess Corp. 32,318 1,815,625
HollyFrontier Corp. 18,528 624,023
Kinder Morgan, Inc. 243,075 4,659,748
Marathon Oil Corp. 99,821 826,518
Marathon Petroleum Corp. 81,025 3,842,206
Noble Energy, Inc. 59,684 944,798
Occidental Petroleum Corp. 111,479 3,649,822
ONEOK, Inc. 51,552 3,439,549
Phillips 66 55,455 4,151,361
Pioneer Natural Resources Co. 20,673 2,538,231
Valero Energy Corp. 51,245 3,394,981
Williams Companies, Inc. (The) 151,254 2,881,389
Total   99,210,522
Total Energy 109,231,280
Financials 12.1%
Banks 4.9%
Bank of America Corp. 1,010,237 28,791,755
Citigroup, Inc. 272,433 17,288,598
Citizens Financial Group, Inc. 54,246 1,719,056
Comerica, Inc. 17,984 946,678
Fifth Third Bancorp 88,554 2,160,718
First Republic Bank 21,030 2,114,987
Huntington Bancshares, Inc. 128,875 1,581,296
JPMorgan Chase & Co. 391,400 45,445,454
KeyCorp 122,915 2,009,660
M&T Bank Corp. 16,467 2,311,637
People’s United Financial, Inc. 55,426 775,410
PNC Financial Services Group, Inc. (The) 54,683 6,911,931
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Large Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Regions Financial Corp. 120,378 1,627,511
SVB Financial Group(a) 6,439 1,340,342
Truist Financial Corp. 167,346 7,721,344
U.S. Bancorp 177,365 8,236,831
Wells Fargo & Co. 480,278 19,619,356
Zions Bancorp 21,267 849,617
Total   151,452,181
Capital Markets 2.7%
Ameriprise Financial, Inc.(c) 15,809 2,233,812
Bank of New York Mellon Corp. (The) 104,718 4,178,248
BlackRock, Inc. 14,715 6,813,192
Cboe Global Markets, Inc. 13,837 1,577,418
Charles Schwab Corp. (The) 142,664 5,813,558
CME Group, Inc. 44,723 8,891,827
E*TRADE Financial Corp. 28,190 1,290,538
Franklin Resources, Inc. 34,805 757,357
Goldman Sachs Group, Inc. (The) 39,772 7,985,024
Intercontinental Exchange, Inc. 69,485 6,199,452
Invesco Ltd. 46,448 668,851
MarketAxess Holdings, Inc. 4,730 1,534,081
Moody’s Corp. 20,258 4,862,528
Morgan Stanley 153,503 6,912,240
MSCI, Inc. 10,573 3,123,687
Nasdaq, Inc. 14,314 1,467,901
Northern Trust Corp. 26,441 2,320,462
Raymond James Financial, Inc. 15,410 1,288,738
S&P Global, Inc. 30,499 8,109,989
State Street Corp. 45,373 3,090,355
T. Rowe Price Group, Inc. 29,163 3,441,526
Total   82,560,784
Consumer Finance 0.6%
American Express Co. 83,733 9,204,769
Capital One Financial Corp. 58,121 5,129,759
Discover Financial Services 39,116 2,565,227
Synchrony Financial 70,430 2,049,513
Total   18,949,268
Diversified Financial Services 1.6%
Berkshire Hathaway, Inc., Class B(a) 244,088 50,365,118
Common Stocks (continued)
Issuer Shares Value ($)
Insurance 2.3%
Aflac, Inc. 91,600 3,925,060
Allstate Corp. (The) 40,423 4,254,521
American International Group, Inc. 108,558 4,576,805
Aon PLC 29,221 6,077,968
Arthur J Gallagher & Co. 23,272 2,268,787
Assurant, Inc. 7,564 912,143
Chubb Ltd. 56,551 8,201,592
Cincinnati Financial Corp. 18,962 1,768,017
Everest Re Group Ltd. 5,086 1,260,718
Globe Life, Inc. 12,428 1,151,579
Hartford Financial Services Group, Inc. (The) 44,974 2,246,451
Lincoln National Corp. 24,746 1,123,221
Loews Corp. 31,922 1,456,601
Marsh & McLennan Companies, Inc. 62,979 6,585,084
MetLife, Inc. 97,543 4,167,037
Principal Financial Group, Inc. 32,223 1,430,379
Progressive Corp. (The) 72,952 5,337,168
Prudential Financial, Inc. 50,163 3,784,798
Travelers Companies, Inc. (The) 32,205 3,858,481
Unum Group 25,742 600,046
Willis Towers Watson PLC 16,045 3,036,516
WR Berkley Corp. 18,110 1,215,905
Total   69,238,877
Total Financials 372,566,228
Health Care 13.9%
Biotechnology 2.1%
AbbVie, Inc. 184,542 15,817,095
Alexion Pharmaceuticals, Inc.(a) 27,612 2,596,356
Amgen, Inc. 74,149 14,809,780
Biogen, Inc.(a) 22,514 6,943,093
Gilead Sciences, Inc. 157,879 10,950,487
Incyte Corp.(a) 22,310 1,682,397
Regeneron Pharmaceuticals, Inc.(a) 9,972 4,433,252
Vertex Pharmaceuticals, Inc.(a) 32,094 7,190,019
Total   64,422,479
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
11

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Health Care Equipment & Supplies 3.5%
Abbott Laboratories 220,551 16,989,044
ABIOMED, Inc.(a) 5,632 846,264
Align Technology, Inc.(a) 8,952 1,954,669
Baxter International, Inc. 63,713 5,318,124
Becton Dickinson and Co. 33,752 8,026,901
Boston Scientific Corp.(a) 173,928 6,503,168
Cooper Companies, Inc. (The) 6,185 2,007,465
Danaher Corp. 79,776 11,534,014
Dentsply Sirona, Inc. 27,751 1,366,459
Edwards Lifesciences Corp.(a) 26,026 5,331,166
Hologic, Inc.(a) 33,460 1,576,635
IDEXX Laboratories, Inc.(a) 10,709 2,725,548
Intuitive Surgical, Inc.(a) 14,421 7,700,237
Medtronic PLC 167,266 16,838,668
ResMed, Inc. 17,942 2,852,060
STERIS PLC 10,580 1,678,200
Stryker Corp. 40,183 7,658,478
Teleflex, Inc. 5,780 1,936,416
Varian Medical Systems, Inc.(a) 11,347 1,395,341
Zimmer Biomet Holdings, Inc. 25,670 3,494,970
Total   107,733,827
Health Care Providers & Services 2.7%
AmerisourceBergen Corp. 18,759 1,581,759
Anthem, Inc. 31,638 8,133,814
Cardinal Health, Inc. 36,496 1,902,172
Centene Corp.(a) 72,855 3,862,772
Cigna Corp. 46,595 8,524,089
CVS Health Corp. 162,347 9,607,696
DaVita, Inc.(a) 11,187 868,335
HCA Healthcare, Inc. 33,009 4,192,473
Henry Schein, Inc.(a) 18,313 1,115,994
Humana, Inc. 16,530 5,284,310
Laboratory Corp. of America Holdings(a) 12,115 2,128,484
McKesson Corp. 22,486 3,144,892
Quest Diagnostics, Inc. 16,806 1,782,444
UnitedHealth Group, Inc. 118,226 30,142,901
Universal Health Services, Inc., Class B 10,025 1,240,494
Total   83,512,629
Common Stocks (continued)
Issuer Shares Value ($)
Health Care Technology 0.1%
Cerner Corp. 39,194 2,714,968
Life Sciences Tools & Services 1.0%
Agilent Technologies, Inc. 38,618 2,976,289
Illumina, Inc.(a) 18,343 4,873,185
IQVIA Holdings, Inc.(a) 22,515 3,140,617
Mettler-Toledo International, Inc.(a) 3,042 2,134,571
PerkinElmer, Inc. 13,865 1,198,491
Thermo Fisher Scientific, Inc. 50,040 14,551,632
Waters Corp.(a) 8,037 1,566,331
Total   30,441,116
Pharmaceuticals 4.5%
Allergan PLC 40,965 7,810,797
Bristol-Myers Squibb Co. 292,529 17,276,763
Eli Lilly & Co. 105,438 13,298,895
Johnson & Johnson 328,427 44,166,863
Merck & Co., Inc. 317,709 24,323,801
Mylan NV(a) 64,412 1,107,242
Perrigo Co. PLC 16,987 861,071
Pfizer, Inc. 690,593 23,079,618
Zoetis, Inc. 59,440 7,919,191
Total   139,844,241
Total Health Care 428,669,260
Industrials 8.8%
Aerospace & Defense 2.4%
Arconic, Inc. 48,335 1,418,632
Boeing Co. (The) 66,721 18,355,614
General Dynamics Corp. 29,240 4,669,336
Huntington Ingalls Industries, Inc. 5,105 1,049,231
L3 Harris Technologies, Inc. 27,582 5,453,789
Lockheed Martin Corp. 30,972 11,455,614
Northrop Grumman Corp. 19,557 6,431,124
Raytheon Co. 34,751 6,552,649
Textron, Inc. 28,482 1,156,369
TransDigm Group, Inc. 6,215 3,466,789
United Technologies Corp. 101,245 13,221,584
Total   73,230,731
 
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Large Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Air Freight & Logistics 0.5%
CH Robinson Worldwide, Inc. 16,877 1,162,825
Expeditors International of Washington, Inc. 21,256 1,496,848
FedEx Corp. 29,955 4,228,747
United Parcel Service, Inc., Class B 87,446 7,912,989
Total   14,801,409
Airlines 0.3%
Alaska Air Group, Inc. 15,369 775,520
American Airlines Group, Inc. 48,649 926,763
Delta Air Lines, Inc. 71,833 3,313,656
Southwest Airlines Co. 59,108 2,730,199
United Airlines Holdings, Inc.(a) 27,160 1,672,784
Total   9,418,922
Building Products 0.3%
Allegion PLC 11,596 1,333,424
AO Smith Corp. 17,106 676,542
Fortune Brands Home & Security, Inc. 17,361 1,072,042
Johnson Controls International PLC 96,263 3,520,338
Masco Corp. 35,457 1,465,083
Total   8,067,429
Commercial Services & Supplies 0.4%
Cintas Corp. 10,460 2,790,100
Copart, Inc.(a) 25,528 2,156,605
Republic Services, Inc. 26,283 2,372,304
Rollins, Inc. 17,566 657,671
Waste Management, Inc. 48,710 5,397,555
Total   13,374,235
Construction & Engineering 0.1%
Jacobs Engineering Group, Inc. 16,909 1,561,377
Quanta Services, Inc. 17,761 677,227
Total   2,238,604
Electrical Equipment 0.5%
AMETEK, Inc. 28,528 2,453,408
Eaton Corp. PLC 51,592 4,680,426
Emerson Electric Co. 76,013 4,873,194
Rockwell Automation, Inc. 14,424 2,646,804
Total   14,653,832
Common Stocks (continued)
Issuer Shares Value ($)
Industrial Conglomerates 1.3%
3M Co. 71,763 10,709,910
General Electric Co. 1,089,849 11,857,557
Honeywell International, Inc. 89,163 14,459,564
Roper Technologies, Inc. 12,987 4,567,528
Total   41,594,559
Machinery 1.5%
Caterpillar, Inc. 68,962 8,567,839
Cummins, Inc. 19,118 2,892,362
Deere & Co. 39,295 6,148,882
Dover Corp. 18,125 1,862,162
Flowserve Corp. 16,330 656,303
Fortive Corp. 36,880 2,550,621
IDEX Corp. 9,490 1,404,520
Illinois Tool Works, Inc. 36,501 6,124,138
PACCAR, Inc. 43,157 2,887,203
Parker-Hannifin Corp. 16,029 2,961,678
Pentair PLC 20,972 826,087
Snap-On, Inc. 6,847 991,103
Stanley Black & Decker, Inc. 18,970 2,725,989
Trane Technologies PLC 29,898 3,858,038
Westinghouse Air Brake Technologies Corp. 22,726 1,561,276
Xylem, Inc. 22,473 1,738,062
Total   47,756,263
Professional Services 0.3%
Equifax, Inc. 15,108 2,145,940
IHS Markit Ltd. 50,038 3,564,707
Nielsen Holdings PLC 44,403 808,579
Robert Half International, Inc. 14,670 739,515
Verisk Analytics, Inc. 20,454 3,172,620
Total   10,431,361
Road & Rail 1.0%
CSX Corp. 97,036 6,836,186
JB Hunt Transport Services, Inc. 10,642 1,026,314
Kansas City Southern 12,372 1,864,213
Norfolk Southern Corp. 32,543 5,934,216
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
13

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Old Dominion Freight Line, Inc. 7,970 1,544,586
Union Pacific Corp. 86,629 13,844,181
Total   31,049,696
Trading Companies & Distributors 0.2%
Fastenal Co. 71,572 2,449,194
United Rentals, Inc.(a) 9,374 1,241,868
W.W. Grainger, Inc. 5,447 1,511,760
Total   5,202,822
Total Industrials 271,819,863
Information Technology 24.2%
Communications Equipment 0.9%
Arista Networks, Inc.(a) 6,772 1,307,809
Cisco Systems, Inc. 529,384 21,138,303
F5 Networks, Inc.(a) 7,584 909,701
Juniper Networks, Inc. 41,767 886,296
Motorola Solutions, Inc. 21,383 3,542,735
Total   27,784,844
Electronic Equipment, Instruments & Components 0.5%
Amphenol Corp., Class A 36,994 3,391,610
CDW Corp. 17,930 2,047,965
Corning, Inc. 95,971 2,289,868
FLIR Systems, Inc. 16,741 710,990
IPG Photonics Corp.(a) 4,440 566,722
Keysight Technologies, Inc.(a) 23,407 2,218,047
TE Connectivity Ltd. 41,736 3,458,662
Zebra Technologies Corp., Class A(a) 6,730 1,419,828
Total   16,103,692
IT Services 5.6%
Accenture PLC, Class A 79,253 14,312,299
Akamai Technologies, Inc.(a) 20,166 1,744,561
Alliance Data Systems Corp. 5,118 439,534
Automatic Data Processing, Inc. 53,999 8,355,805
Broadridge Financial Solutions, Inc. 14,306 1,492,974
Cognizant Technology Solutions Corp., Class A 68,334 4,163,590
DXC Technology Co. 31,945 770,194
Fidelity National Information Services, Inc. 76,690 10,715,127
Fiserv, Inc.(a) 71,267 7,793,759
FleetCor Technologies, Inc.(a) 10,828 2,877,974
Common Stocks (continued)
Issuer Shares Value ($)
Gartner, Inc.(a) 11,164 1,444,510
Global Payments, Inc. 37,508 6,900,347
International Business Machines Corp. 110,518 14,383,918
Jack Henry & Associates, Inc. 9,605 1,457,463
Leidos Holdings, Inc. 16,610 1,705,016
MasterCard, Inc., Class A 110,774 32,152,153
Paychex, Inc. 39,758 3,080,450
PayPal Holdings, Inc.(a) 146,522 15,822,911
VeriSign, Inc.(a) 12,891 2,446,067
Visa, Inc., Class A 213,614 38,826,481
Western Union Co. (The) 52,315 1,171,333
Total   172,056,466
Semiconductors & Semiconductor Equipment 4.3%
Advanced Micro Devices, Inc.(a) 145,958 6,638,170
Analog Devices, Inc. 45,964 5,012,374
Applied Materials, Inc. 115,278 6,699,957
Broadcom, Inc. 49,498 13,494,145
Intel Corp. 542,827 30,137,755
KLA Corp. 19,686 3,025,935
Lam Research Corp. 18,106 5,312,844
Maxim Integrated Products, Inc. 33,766 1,878,065
Microchip Technology, Inc. 29,824 2,705,335
Micron Technology, Inc.(a) 138,146 7,260,954
NVIDIA Corp. 76,367 20,624,436
Qorvo, Inc.(a) 14,495 1,457,907
QUALCOMM, Inc. 142,492 11,157,124
Skyworks Solutions, Inc. 21,262 2,130,027
Texas Instruments, Inc. 116,647 13,314,088
Xilinx, Inc. 31,384 2,620,250
Total   133,469,366
Software 7.9%
Adobe, Inc.(a) 60,410 20,848,699
ANSYS, Inc.(a) 10,676 2,585,620
Autodesk, Inc.(a) 27,461 5,241,756
Cadence Design Systems, Inc.(a) 35,013 2,315,760
Citrix Systems, Inc. 14,353 1,483,957
Fortinet, Inc.(a) 17,712 1,807,687
Intuit, Inc. 32,479 8,634,542
Microsoft Corp. 951,989 154,231,738
 
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Large Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Oracle Corp. 270,346 13,371,313
Paycom Software, Inc.(a) 6,120 1,729,818
Salesforce.com, Inc.(a) 110,687 18,861,065
ServiceNow, Inc.(a) 23,540 7,676,158
Symantec Corp. 71,555 1,361,692
Synopsys, Inc.(a) 18,756 2,587,015
Total   242,736,820
Technology Hardware, Storage & Peripherals 5.0%
Apple, Inc. 521,202 142,475,779
Hewlett Packard Enterprise Co. 161,481 2,065,342
HP, Inc. 184,929 3,844,674
NetApp, Inc. 28,484 1,330,772
Seagate Technology PLC 28,852 1,383,453
Western Digital Corp. 37,114 2,062,054
Xerox Holdings Corp. 23,200 747,040
Total   153,909,114
Total Information Technology 746,060,302
Materials 2.5%
Chemicals 1.8%
Air Products & Chemicals, Inc. 27,508 6,041,032
Albemarle Corp. 13,235 1,083,285
Celanese Corp., Class A 15,086 1,414,162
CF Industries Holdings, Inc. 27,133 1,000,122
Corteva, Inc. 93,389 2,540,181
Dow, Inc. 92,533 3,739,259
DuPont de Nemours, Inc. 92,449 3,966,062
Eastman Chemical Co. 16,970 1,043,825
Ecolab, Inc. 31,296 5,647,363
FMC Corp. 16,179 1,506,265
International Flavors & Fragrances, Inc. 13,322 1,595,709
Linde PLC 67,031 12,803,591
LyondellBasell Industries NV, Class A 32,035 2,289,221
Mosaic Co. (The) 43,631 743,036
PPG Industries, Inc. 29,510 3,082,320
Sherwin-Williams Co. (The) 10,254 5,298,754
Total   53,794,187
Common Stocks (continued)
Issuer Shares Value ($)
Construction Materials 0.1%
Martin Marietta Materials, Inc. 7,800 1,774,734
Vulcan Materials Co. 16,515 1,986,094
Total   3,760,828
Containers & Packaging 0.3%
Amcor PLC 202,170 1,884,224
Avery Dennison Corp. 10,419 1,192,871
Ball Corp. 40,821 2,876,248
International Paper Co. 48,931 1,808,490
Packaging Corp. of America 11,814 1,070,585
Sealed Air Corp. 19,282 584,437
WestRock Co. 32,179 1,069,952
Total   10,486,807
Metals & Mining 0.3%
Freeport-McMoRan, Inc. 181,059 1,803,347
Newmont Corp. 102,306 4,565,917
Nucor Corp. 37,837 1,564,560
Total   7,933,824
Total Materials 75,975,646
Real Estate 3.1%
Equity Real Estate Investment Trusts (REITS) 3.0%
Alexandria Real Estate Equities, Inc. 15,300 2,323,764
American Tower Corp. 55,274 12,536,143
Apartment Investment & Management Co., Class A 18,584 889,059
AvalonBay Communities, Inc. 17,433 3,496,885
Boston Properties, Inc. 17,947 2,314,086
Crown Castle International Corp. 51,885 7,434,602
Digital Realty Trust, Inc. 26,049 3,128,745
Duke Realty Corp. 45,873 1,489,496
Equinix, Inc. 10,640 6,094,592
Equity Residential 43,561 3,271,431
Essex Property Trust, Inc. 8,243 2,335,736
Extra Space Storage, Inc. 16,161 1,621,918
Federal Realty Investment Trust 8,760 1,019,138
Healthpeak Properties, Inc. 61,764 1,954,213
Host Hotels & Resorts, Inc. 89,494 1,295,873
Iron Mountain, Inc. 35,832 1,089,651
Kimco Realty Corp. 52,686 914,102
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
15

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Mid-America Apartment Communities, Inc. 14,237 1,840,275
ProLogis, Inc. 92,129 7,764,632
Public Storage 18,747 3,920,373
Realty Income Corp. 40,670 2,944,101
Regency Centers Corp. 20,913 1,201,243
SBA Communications Corp. 14,051 3,724,780
Simon Property Group, Inc. 38,295 4,713,349
SL Green Realty Corp. 10,177 798,284
UDR, Inc. 36,573 1,645,054
Ventas, Inc. 46,511 2,500,896
Vornado Realty Trust 19,769 1,059,223
Welltower, Inc. 50,630 3,788,137
Weyerhaeuser Co. 92,984 2,415,724
Total   91,525,505
Real Estate Management & Development 0.1%
CBRE Group, Inc., Class A(a) 41,771 2,345,024
Total Real Estate 93,870,529
Utilities 3.5%
Electric Utilities 2.2%
Alliant Energy Corp. 29,989 1,563,027
American Electric Power Co., Inc. 61,641 5,502,076
Duke Energy Corp. 90,973 8,342,224
Edison International 44,753 3,006,954
Entergy Corp. 24,843 2,904,395
Evergy, Inc. 28,435 1,858,227
Eversource Energy 40,401 3,493,070
Exelon Corp. 121,308 5,229,588
FirstEnergy Corp. 67,427 3,002,524
NextEra Energy, Inc. 60,991 15,416,085
NRG Energy, Inc. 31,398 1,042,728
Pinnacle West Capital Corp. 14,029 1,255,455
PPL Corp. 95,820 2,875,558
Southern Co. (The) 130,866 7,899,072
Xcel Energy, Inc. 65,436 4,077,972
Total   67,468,955
Common Stocks (continued)
Issuer Shares Value ($)
Gas Utilities 0.1%
Atmos Energy Corp. 14,890 1,537,392
Independent Power and Renewable Electricity Producers 0.0%
AES Corp. (The) 82,846 1,386,014
Multi-Utilities 1.1%
Ameren Corp. 30,698 2,425,142
CenterPoint Energy, Inc. 62,669 1,442,640
CMS Energy Corp. 35,418 2,139,956
Consolidated Edison, Inc. 41,486 3,269,927
Dominion Energy, Inc. 102,708 8,029,711
DTE Energy Co. 23,968 2,676,507
NiSource, Inc. 46,614 1,259,510
Public Service Enterprise Group, Inc. 63,105 3,237,918
Sempra Energy 35,176 4,916,901
WEC Energy Group, Inc. 39,361 3,634,201
Total   33,032,413
Water Utilities 0.1%
American Water Works Co., Inc. 22,563 2,790,140
Total Utilities 106,214,914
Total Common Stocks
(Cost $1,173,072,098)
3,055,257,334
Money Market Funds 1.0%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(c),(d) 31,165,087 31,165,087
Total Money Market Funds
(Cost $31,164,225)
31,165,087
Total Investments in Securities
(Cost: $1,204,236,323)
3,086,422,421
Other Assets & Liabilities, Net   (6,868,438)
Net Assets 3,079,553,983
 
At February 29, 2020, securities and/or cash totaling $2,443,400 were pledged as collateral.
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Large Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Investments in derivatives
Long futures contracts
Description Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
S&P 500 Index E-mini 205 03/2020 USD 30,248,775 (2,846,370)
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) This security or a portion of this security has been pledged as collateral in connection with derivative contracts.
(c) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Ameriprise Financial, Inc.
  19,049 560 (3,800) 15,809 417,086 (194,795) 67,431 2,233,812
Columbia Short-Term Cash Fund, 1.641%
  37,569,669 656,778,984 (663,183,566) 31,165,087 2,085 862 823,339 31,165,087
Total         419,171 (193,933) 890,770 33,398,899
    
(d) The rate shown is the seven-day current annualized yield at February 29, 2020.
Currency Legend
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
17

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 327,136,369 327,136,369
Consumer Discretionary 302,431,696 302,431,696
Consumer Staples 221,281,247 221,281,247
Energy 109,231,280 109,231,280
Financials 372,566,228 372,566,228
Health Care 428,669,260 428,669,260
Industrials 271,819,863 271,819,863
Information Technology 746,060,302 746,060,302
Materials 75,975,646 75,975,646
Real Estate 93,870,529 93,870,529
Utilities 106,214,914 106,214,914
Total Common Stocks 3,055,257,334 3,055,257,334
Money Market Funds 31,165,087 31,165,087
Total Investments in Securities 3,086,422,421 3,086,422,421
Investments in Derivatives        
Liability        
Futures Contracts (2,846,370) (2,846,370)
Total 3,083,576,051 3,083,576,051
See the Portfolio of Investments for all investment classifications not indicated in the table.
Derivative instruments are valued at unrealized appreciation (depreciation).
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Large Cap Index Fund  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $1,172,735,139) $3,053,023,522
Affiliated issuers (cost $31,501,184) 33,398,899
Receivable for:  
Investments sold 204,529
Capital shares sold 3,792,859
Dividends 6,156,195
Foreign tax reclaims 9,596
Variation margin for futures contracts 24,381
Expense reimbursement due from Investment Manager 94
Total assets 3,096,610,075
Liabilities  
Payable for:  
Investments purchased 167,756
Capital shares purchased 16,546,420
Variation margin for futures contracts 72,790
Management services fees 17,046
Distribution and/or service fees 3,994
Compensation of board members 248,086
Total liabilities 17,056,092
Net assets applicable to outstanding capital stock $3,079,553,983
Represented by  
Paid in capital 1,100,993,429
Total distributable earnings (loss) 1,978,560,554
Total - representing net assets applicable to outstanding capital stock $3,079,553,983
Class A  
Net assets $579,726,406
Shares outstanding 12,297,055
Net asset value per share $47.14
Institutional Class  
Net assets $2,136,889,875
Shares outstanding 45,040,317
Net asset value per share $47.44
Institutional 2 Class  
Net assets $311,673,579
Shares outstanding 6,461,601
Net asset value per share $48.23
Institutional 3 Class  
Net assets $51,264,123
Shares outstanding 1,099,285
Net asset value per share $46.63
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
19

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $70,984,615
Dividends — affiliated issuers 890,770
Total income 71,875,385
Expenses:  
Management services fees 6,735,646
Distribution and/or service fees  
Class A 1,723,420
Compensation of board members 80,334
Other 17,227
Total expenses 8,556,627
Fees waived or expenses reimbursed by Investment Manager and its affiliates (116,212)
Expense reduction (2,720)
Total net expenses 8,437,695
Net investment income 63,437,690
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 216,724,228
Investments — affiliated issuers 419,171
Futures contracts 5,828,555
Net realized gain 222,971,954
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (10,058,912)
Investments — affiliated issuers (193,933)
Futures contracts (4,857,315)
Net change in unrealized appreciation (depreciation) (15,110,160)
Net realized and unrealized gain 207,861,794
Net increase in net assets resulting from operations $271,299,484
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Large Cap Index Fund  | Annual Report 2020

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $63,437,690 $65,669,245
Net realized gain 222,971,954 292,517,545
Net change in unrealized appreciation (depreciation) (15,110,160) (208,454,663)
Net increase in net assets resulting from operations 271,299,484 149,732,127
Distributions to shareholders    
Net investment income and net realized gains    
Class A (66,153,830) (72,003,666)
Institutional Class (219,833,585) (191,279,357)
Institutional 2 Class (33,886,772) (28,460,122)
Institutional 3 Class (10,828,920) (3,603,049)
Total distributions to shareholders (330,703,107) (295,346,194)
Decrease in net assets from capital stock activity (103,762,339) (329,802,578)
Total decrease in net assets (163,165,962) (475,416,645)
Net assets at beginning of year 3,242,719,945 3,718,136,590
Net assets at end of year $3,079,553,983 $3,242,719,945
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
21

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 2,673,174 133,945,597 3,602,972 176,634,521
Distributions reinvested 1,227,614 60,363,226 1,393,705 66,633,359
Redemptions (6,644,814) (333,488,086) (8,888,336) (426,451,981)
Net decrease (2,744,026) (139,179,263) (3,891,659) (183,184,101)
Institutional Class        
Subscriptions 7,474,928 374,259,348 9,361,576 460,787,545
Distributions reinvested 3,690,482 182,829,027 3,272,218 157,231,884
Redemptions (10,074,191) (505,004,711) (15,856,072) (781,638,149)
Net increase (decrease) 1,091,219 52,083,664 (3,222,278) (163,618,720)
Institutional 2 Class        
Subscriptions 1,465,664 75,091,232 1,745,397 86,867,384
Distributions reinvested 670,343 33,706,797 583,231 28,449,210
Redemptions (2,495,254) (127,811,335) (2,755,072) (139,570,550)
Net decrease (359,247) (19,013,306) (426,444) (24,253,956)
Institutional 3 Class        
Subscriptions 3,171,942 154,038,825 4,123,039 197,786,960
Distributions reinvested 223,497 10,825,775 76,120 3,602,817
Redemptions (3,247,613) (162,518,034) (3,258,741) (160,135,578)
Net increase 147,826 2,346,566 940,418 41,254,199
Total net decrease (1,864,228) (103,762,339) (6,599,963) (329,802,578)
The accompanying Notes to Financial Statements are an integral part of this statement.
22 Columbia Large Cap Index Fund  | Annual Report 2020

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Columbia Large Cap Index Fund  | Annual Report 2020
23

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $48.30 0.84 2.97 3.81 (0.88) (4.09) (4.97)
Year Ended 2/28/2019 $50.42 0.81 1.18 1.99 (0.83) (3.28) (4.11)
Year Ended 2/28/2018 $45.16 0.73 6.65 7.38 (0.77) (1.35) (2.12)
Year Ended 2/28/2017 $37.05 0.73 8.24 8.97 (0.73) (0.13) (0.86)
Year Ended 2/29/2016 $40.60 0.64 (3.24) (2.60) (0.85) (0.10) (0.95)
Institutional Class
Year Ended 2/29/2020 $48.57 0.98 2.98 3.96 (1.00) (4.09) (5.09)
Year Ended 2/28/2019 $50.68 0.94 1.18 2.12 (0.95) (3.28) (4.23)
Year Ended 2/28/2018 $45.38 0.85 6.69 7.54 (0.89) (1.35) (2.24)
Year Ended 2/28/2017 $37.22 0.84 8.28 9.12 (0.83) (0.13) (0.96)
Year Ended 2/29/2016 $40.78 0.75 (3.26) (2.51) (0.95) (0.10) (1.05)
Institutional 2 Class
Year Ended 2/29/2020 $49.30 0.99 3.03 4.02 (1.00) (4.09) (5.09)
Year Ended 2/28/2019 $51.38 0.95 1.20 2.15 (0.95) (3.28) (4.23)
Year Ended 2/28/2018 $45.98 0.87 6.77 7.64 (0.89) (1.35) (2.24)
Year Ended 2/28/2017 $37.70 0.85 8.39 9.24 (0.83) (0.13) (0.96)
Year Ended 2/29/2016 $41.29 0.84 (3.38) (2.54) (0.95) (0.10) (1.05)
Institutional 3 Class
Year Ended 2/29/2020 $47.81 0.98 2.93 3.91 (1.00) (4.09) (5.09)
Year Ended 2/28/2019 $49.95 0.92 1.17 2.09 (0.95) (3.28) (4.23)
Year Ended 2/28/2018(f) $45.37 0.98 5.84 6.82 (0.89) (1.35) (2.24)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) The benefits derived from expense reductions had an impact of less than 0.01%.
(d) Ratios include interfund lending expense which is less than 0.01%.
(e) Ratios include line of credit interest expense which is less than 0.01%.
(f) Institutional 3 Class shares commenced operations on March 1, 2017. Per share data and total return reflect activity from that date.
The accompanying Notes to Financial Statements are an integral part of this statement.
24 Columbia Large Cap Index Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $47.14 7.70% 0.45% 0.45%(c) 1.68% 7% $579,726
Year Ended 2/28/2019 $48.30 4.19% 0.45%(d) 0.45%(c),(d) 1.64% 6% $726,445
Year Ended 2/28/2018 $50.42 16.59% 0.45% 0.45%(c) 1.53% 2% $954,529
Year Ended 2/28/2017 $45.16 24.40% 0.45%(e) 0.45%(c),(e) 1.77% 4% $1,071,791
Year Ended 2/29/2016 $37.05 (6.57%) 0.45% 0.45%(c) 1.63% 11% $993,376
Institutional Class
Year Ended 2/29/2020 $47.44 7.97% 0.20% 0.20%(c) 1.94% 7% $2,136,890
Year Ended 2/28/2019 $48.57 4.46% 0.20%(d) 0.20%(c),(d) 1.89% 6% $2,134,512
Year Ended 2/28/2018 $50.68 16.88% 0.20% 0.20%(c) 1.78% 2% $2,390,677
Year Ended 2/28/2017 $45.38 24.72% 0.20%(e) 0.20%(c),(e) 2.02% 4% $2,259,128
Year Ended 2/29/2016 $37.22 (6.34%) 0.20% 0.20%(c) 1.88% 11% $1,975,099
Institutional 2 Class
Year Ended 2/29/2020 $48.23 7.97% 0.20% 0.20% 1.93% 7% $311,674
Year Ended 2/28/2019 $49.30 4.45% 0.20%(d) 0.20%(d) 1.89% 6% $336,271
Year Ended 2/28/2018 $51.38 16.87% 0.20% 0.20% 1.78% 2% $372,379
Year Ended 2/28/2017 $45.98 24.73% 0.20%(e) 0.20%(e) 2.02% 4% $361,419
Year Ended 2/29/2016 $37.70 (6.33%) 0.20% 0.20% 2.12% 11% $273,170
Institutional 3 Class
Year Ended 2/29/2020 $46.63 7.99% 0.20% 0.20% 1.98% 7% $51,264
Year Ended 2/28/2019 $47.81 4.46% 0.20%(d) 0.20%(d) 1.91% 6% $45,493
Year Ended 2/28/2018(f) $49.95 15.29% 0.21% 0.20% 2.01% 2% $552
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Index Fund  | Annual Report 2020
25

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Large Cap Index Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
26 Columbia Large Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of transactions, at the mean of the latest quoted bid and ask prices.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
Columbia Large Cap Index Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Futures contracts
Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to maintain appropriate equity market exposure while keeping sufficient cash to accommodate daily redemptions. These instruments may be used for other purposes in future periods. Upon entering into futures contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.
Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
28 Columbia Large Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Equity risk Component of total distributable earnings (loss) — unrealized depreciation on futures contracts 2,846,370*
    
* Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin is reported in receivables or payables in the Statement of Assets and Liabilities.
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk 5,828,555
 
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk (4,857,315)
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average notional
amounts ($)*
Futures contracts — long 40,940,615
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Columbia Large Cap Index Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to 0.20% of the Fund’s daily net assets.
30 Columbia Large Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The Investment Manager, from the management services fee it receives from the Fund, pays all operating expenses of the Fund, with the exception of brokerage fees and commissions, taxes, interest, fees and expenses of Board of Trustees who are not officers, directors or employees of the Investment Manager or its affiliates, distribution and/or shareholder servicing and any extraordinary non-recurring expenses that may arise, including litigation fees.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. A portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets. The expenses of the Chief Compliance Officer allocated to the Fund are payable by the Investment Manager.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent.
The transfer agency fees are payable by the Investment Manager. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund. The Transfer Agent also receives compensation from the Investment Manager for various shareholder services and reimbursements for certain out-of-pocket expenses.
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $2,720.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund.
Columbia Large Cap Index Fund  | Annual Report 2020
31

Notes to Financial Statements  (continued)
February 29, 2020
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  Fee rate(s) contractual
through
June 30, 2020
Class A 0.45%
Institutional Class 0.20
Institutional 2 Class 0.20
Institutional 3 Class 0.20
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, re-characterization of distributions for investments, and corporate action. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Undistributed net
investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
(415,107) 415,107
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
63,027,455 267,675,652 330,703,107 65,174,131 230,172,063 295,346,194
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
32 Columbia Large Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
9,653,981 110,390,296 1,858,760,612
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
1,224,815,439 1,933,230,469 (74,469,857) 1,858,760,612
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $214,718,334 and $562,722,054, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund did not borrow or lend money under the Interfund Program during the year ended February 29, 2020.
Columbia Large Cap Index Fund  | Annual Report 2020
33

Notes to Financial Statements  (continued)
February 29, 2020
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Information technology sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the information technology sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the information technology sectors are subject to certain risks, including the risk that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. Performance of such companies may be affected by factors including obtaining and protecting patents (or the failure to do so) and significant competitive pressures, including aggressive pricing of their products or services, new market entrants, competition for market share and short product cycles due to an accelerated rate of technological developments. Such competitive pressures may lead to limited earnings and/or falling profit margins. As a result, the value of their securities may fall or fail to rise. In addition, many information technology sector companies have limited operating histories and prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems,
34 Columbia Large Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Passive investment risk
The Fund is not “actively” managed and may be affected by a general decline in market segments related to its underlying index. The Fund invests in securities or instruments included in, or believed by the Investment Manager to be representative of, its underlying index, regardless of their investment merits. The Fund does not seek temporary defensive positions when markets decline or appear overvalued. The decision of whether to remove a security from an index is made by an independent index provider who is not affiliated with the Fund or the Investment Manager.
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 10.3% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 25.4% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to
Columbia Large Cap Index Fund  | Annual Report 2020
35

Notes to Financial Statements  (continued)
February 29, 2020
estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
36 Columbia Large Cap Index Fund  | Annual Report 2020

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Large Cap Index Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Large Cap Index Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
Columbia Large Cap Index Fund  | Annual Report 2020
37

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
100.00% 100.00% $223,118,482
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
38 Columbia Large Cap Index Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
Columbia Large Cap Index Fund  | Annual Report 2020
39

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
40 Columbia Large Cap Index Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name, address, year of birth Position held with the Trust and length of service Principal occupation(s) during the past five years and other relevant professional experience Number of Funds in the Columbia Funds Complex overseen Other directorships held by Trustee during the past five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Boston, MA 02110
1960
Trustee
2012
Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Columbia Large Cap Index Fund  | Annual Report 2020
41

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
42 Columbia Large Cap Index Fund  | Annual Report 2020

[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Large Cap Index Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN175_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Large Cap Growth Opportunity Fund
(formerly, Columbia Large Cap Growth Fund III)
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Large Cap Growth Opportunity Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Large Cap Growth Opportunity Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks long-term growth of capital.
Portfolio management
Nadia Grant, CFA
Co-Portfolio Manager
Managed Fund since November 2019
Tchintcia Barros, CFA
Co-Portfolio Manager
Managed Fund since 2015
Effective November 2019, John Wilson no longer serves as a Portfolio Manager of the Fund.
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 12/31/97 13.54 9.47 12.62
  Including sales charges   7.00 8.18 11.96
Advisor Class* 11/08/12 13.75 9.73 12.82
Class C Excluding sales charges 12/31/97 12.66 8.66 11.79
  Including sales charges   11.69 8.66 11.79
Institutional Class 12/31/97 13.76 9.74 12.90
Institutional 2 Class* 12/11/13 13.81 9.83 12.87
Institutional 3 Class* 03/01/17 13.91 9.71 12.75
Class R* 10/26/16 13.20 9.19 12.34
Russell 1000 Growth Index   15.11 12.41 14.79
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
The Fund’s performance prior to November 2015, when the Investment Manager assumed day-to-day portfolio management responsibilities over the Fund, reflects returns achieved by a subadviser that managed the Fund according to different principal investment strategies. If the Fund’s current strategies had been in place for the prior periods, results shown may have been different.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. Since the Fund launched more than one class of shares at its inception, Class A shares were used. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The Russell 1000 Growth Index, an unmanaged index, measures the performance of those Russell 1000 Index companies with higher price-to-book ratios and higher forecasted growth values.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Large Cap Growth Opportunity Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 99.7
Money Market Funds 0.3
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 14.0
Consumer Discretionary 13.2
Consumer Staples 2.4
Financials 2.1
Health Care 14.9
Industrials 8.2
Information Technology 43.5
Real Estate 1.7
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned 13.54% excluding sales charges, underperforming the Fund’s benchmark, the Russell 1000 Growth Index, which returned 15.11% for the same period. For the annual period, sector allocation contributed slightly to relative performance while stock selection had a modest negative impact.
Stocks posted strong gains despite late dip on coronavirus concerns
As the period opened, investor sentiment was supported by the market’s expectation that the Federal Reserve (Fed) was on hold with respect to its benchmark rate. Stocks declined in May of 2019 on signs of slower economic growth and President Trump’s announcement of plans to impose 25% tariffs on $200 billion in imports from China. Concerns were exacerbated by an inversion of the Treasury yield curve, something which has often foreshadowed recession.
However, the stock market would soon rebound as the Fed signaled that it was prepared to cut rates one or more times before the end of 2019. Together with a firming in corporate earnings expectations, the increasingly accommodative Fed policy outlook counterbalanced anxieties around growth and trade.
U.S. equities essentially traded within a range during the third quarter of 2019, with moves in either direction mostly driven by macro headlines. As it had signaled, the Fed implemented quarter-point interest rate cuts in August and September, while corporate earnings generally came in above their previously lowered forecasts. The large-cap S&P 500 Index reached a record high on July 26, before an escalation in the U.S.-China trade war led stocks lower. While the market regained its footing as trade tensions eased, stocks were pressured as the quarter drew to a close by growing signs of global manufacturing weakness.
U.S. equities moved higher over the fourth quarter of 2019 as investors were encouraged by data suggesting improving economic growth globally. The U.S. economy continued to be bolstered by consumers amid historically low unemployment. In addition, December saw the U.S. and China reach a much-anticipated “phase one” agreement on trade under which the U.S agreed to eliminate some existing tariffs and China agreed to increase purchases of U.S. agricultural products. The House of Representative’s approval of the Trump administration’s deal with Canada and Mexico further reduced uncertainty around trade.
Market sentiment remained well-supported into February of 2020. However, as the period drew to a close, concerns emanating from China over the rapid spread of a new and highly contagious coronavirus drove stock prices sharply lower.
Contributors and detractors
For the 12 months, the Fund’s underweight allocation to industrials added to performance relative to the benchmark while an overweight to health care detracted. Stock selection within industrials, health care and information technology contributed positively while selection within materials and communications services constrained return.
In terms of individual positions, positive contributions to relative performance were led by a lack of exposure to Boeing within industrials, as the well-publicized issues with the 737 Max airplane weighed heavily on the stock. Within information technology, contributions were led by a lack of exposure to networking firm Cisco Systems Inc. and overweights to semiconductor processing equipment firm Lam Research Corp. and processing unit manufacturer NVIDIA Corp. Shares of Lam rebounded as demand from chipmakers recovered and the company came out of an earnings trough. NVIDIA has seen demand for its products benefit from the increasing adoption of technologies such as artificial intelligence and cloud computing across a range of industries.
On the downside, within information technology an overweight to enterprise software company VMware, Inc. and an underweight to consumer electronics firm Apple, Inc. weighed most notably on performance. VMware shares lagged on concerns over increased competition driven by the move to cloud computing. The Fund’s modestly below-benchmark exposure to Apple constrained performance as the company reported better than expected revenue and profits driven by strong iPhone sales. Elsewhere, within consumer discretionary an overweight to beauty store chain Ulta Beauty, Inc. detracted. A slowdown in the U.S. cosmetics industry led Ulta to lower guidance relative to expectations for above-market growth.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
Fund positioning
The Fund continues to seek long-term growth of capital by investing in large-cap stocks. During the annual period, the Fund took steps to reduce the number of holdings and thereby hold a more concentrated portfolio featuring greater active weighting of individual stocks. In doing so we focused on holding or avoiding individual stocks which we believed were priced inefficiently based on investor behavioral biases such as overconfidence, loss aversion and inertia. At the same time, we have sought to avoid undue exposure to any individual macro risk at the portfolio level.
As a result of our stock selection process, the Fund moved from a slight underweight to an overweight in technology stocks. We retained overweight exposure to the health care and communication services sectors, along with underweights to consumer staples, materials and financials.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Growth securities, at times, may not perform as well as value securities or the stock market in general and may be out of favor with investors. Foreign investments subject the Fund to risks, including political, economic, market, social and others within a particular country, as well as to currency instabilities and less stringent financial and accounting standards generally applicable to U.S. issuers. The Fund may invest significantly in issuers within a particular sector, which may be negatively affected by market, economic or other conditions, making the Fund more vulnerable to unfavorable developments in the sector. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,061.90 1,019.69 5.33 5.22 1.04
Advisor Class 1,000.00 1,000.00 1,063.00 1,020.93 4.05 3.97 0.79
Class C 1,000.00 1,000.00 1,058.00 1,015.96 9.16 8.97 1.79
Institutional Class 1,000.00 1,000.00 1,063.00 1,020.93 4.05 3.97 0.79
Institutional 2 Class 1,000.00 1,000.00 1,063.30 1,021.23 3.74 3.67 0.73
Institutional 3 Class 1,000.00 1,000.00 1,063.70 1,021.43 3.54 3.47 0.69
Class R 1,000.00 1,000.00 1,060.40 1,018.45 6.61 6.47 1.29
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 100.4%
Issuer Shares Value ($)
Communication Services 14.1%
Entertainment 1.4%
Electronic Arts, Inc.(a) 200,366 20,311,102
Interactive Media & Services 10.6%
Alphabet, Inc., Class A(a) 60,637 81,208,102
Alphabet, Inc., Class C(a) 6,244 8,362,777
Facebook, Inc., Class A(a) 312,220 60,092,983
Total   149,663,862
Media 2.1%
Comcast Corp., Class A 746,911 30,197,612
Total Communication Services 200,172,576
Consumer Discretionary 13.3%
Internet & Direct Marketing Retail 8.8%
Alibaba Group Holding Ltd., ADR(a) 75,846 15,775,968
Amazon.com, Inc.(a) 47,250 89,007,187
Booking Holdings, Inc.(a) 12,148 20,598,878
Total   125,382,033
Multiline Retail 1.3%
Target Corp. 180,322 18,573,166
Specialty Retail 2.2%
Home Depot, Inc. (The) 141,268 30,773,821
Textiles, Apparel & Luxury Goods 1.0%
VF Corp. 198,486 14,290,992
Total Consumer Discretionary 189,020,012
Consumer Staples 2.4%
Food & Staples Retailing 2.4%
Costco Wholesale Corp. 120,072 33,757,042
Total Consumer Staples 33,757,042
Financials 2.1%
Banks 1.0%
Citigroup, Inc. 229,980 14,594,531
Insurance 1.1%
Allstate Corp. (The) 152,344 16,034,206
Total Financials 30,628,737
Common Stocks (continued)
Issuer Shares Value ($)
Health Care 14.9%
Biotechnology 3.6%
Alexion Pharmaceuticals, Inc.(a) 132,870 12,493,766
BioMarin Pharmaceutical, Inc.(a) 154,875 13,996,054
Exact Sciences Corp.(a) 78,770 6,376,432
Vertex Pharmaceuticals, Inc.(a) 84,368 18,900,963
Total   51,767,215
Health Care Equipment & Supplies 4.6%
Abbott Laboratories 317,988 24,494,616
Baxter International, Inc. 261,562 21,832,580
Danaher Corp. 137,014 19,809,484
Total   66,136,680
Health Care Providers & Services 2.0%
Guardant Health, Inc.(a) 77,429 6,733,226
Humana, Inc. 66,865 21,375,403
Total   28,108,629
Life Sciences Tools & Services 0.7%
Bio-Techne Corp. 50,733 9,582,956
Pharmaceuticals 4.0%
Bristol-Myers Squibb Co. 453,078 26,758,787
Eli Lilly & Co. 235,096 29,652,658
Total   56,411,445
Total Health Care 212,006,925
Industrials 8.3%
Aerospace & Defense 2.5%
L3 Harris Technologies, Inc. 136,653 27,020,398
Spirit AeroSystems Holdings, Inc., Class A 151,698 8,015,722
Total   35,036,120
Electrical Equipment 1.1%
AMETEK, Inc. 177,584 15,272,224
Industrial Conglomerates 1.2%
Honeywell International, Inc. 105,738 17,147,531
Machinery 1.3%
Trane Technologies PLC 146,438 18,896,360
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Road & Rail 2.2%
Norfolk Southern Corp. 114,723 20,919,739
Uber Technologies, Inc.(a) 304,102 10,299,935
Total   31,219,674
Total Industrials 117,571,909
Information Technology 43.6%
IT Services 12.4%
Fidelity National Information Services, Inc. 248,387 34,704,632
MasterCard, Inc., Class A 150,850 43,784,212
PayPal Holdings, Inc.(a) 403,735 43,599,343
Visa, Inc., Class A 301,215 54,748,838
Total   176,837,025
Semiconductors & Semiconductor Equipment 8.3%
Broadcom, Inc. 99,635 27,162,494
Lam Research Corp. 69,023 20,253,419
NVIDIA Corp. 141,650 38,255,415
NXP Semiconductors NV 153,529 17,454,712
Qorvo, Inc.(a) 143,578 14,441,075
Total   117,567,115
Software 17.1%
Adobe, Inc.(a) 149,391 51,557,822
Microsoft Corp. 674,617 109,294,700
Salesforce.com, Inc.(a) 150,597 25,661,729
ServiceNow, Inc.(a) 103,447 33,733,032
VMware, Inc., Class A(a) 195,252 23,531,771
Total   243,779,054
Common Stocks (continued)
Issuer Shares Value ($)
Technology Hardware, Storage & Peripherals 5.8%
Apple, Inc. 299,393 81,842,071
Total Information Technology 620,025,265
Real Estate 1.7%
Equity Real Estate Investment Trusts (REITS) 1.7%
Equinix, Inc. 41,514 23,779,219
Total Real Estate 23,779,219
Total Common Stocks
(Cost $959,994,285)
1,426,961,685
Money Market Funds 0.4%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(b),(c) 5,011,288 5,011,288
Total Money Market Funds
(Cost $5,011,247)
5,011,288
Total Investments in Securities
(Cost: $965,005,532)
1,431,972,973
Other Assets & Liabilities, Net   (11,420,399)
Net Assets 1,420,552,574
 
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) The rate shown is the seven-day current annualized yield at February 29, 2020.
(c) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  16,199,955 300,502,750 (311,691,417) 5,011,288 3,591 41 333,189 5,011,288
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Abbreviation Legend
ADR American Depositary Receipt
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 200,172,576 200,172,576
Consumer Discretionary 189,020,012 189,020,012
Consumer Staples 33,757,042 33,757,042
Financials 30,628,737 30,628,737
Health Care 212,006,925 212,006,925
Industrials 117,571,909 117,571,909
Information Technology 620,025,265 620,025,265
Real Estate 23,779,219 23,779,219
Total Common Stocks 1,426,961,685 1,426,961,685
Money Market Funds 5,011,288 5,011,288
Total Investments in Securities 1,431,972,973 1,431,972,973
See the Portfolio of Investments for all investment classifications not indicated in the table.
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $959,994,285) $1,426,961,685
Affiliated issuers (cost $5,011,247) 5,011,288
Receivable for:  
Capital shares sold 261,065
Dividends 1,219,017
Expense reimbursement due from Investment Manager 2,508
Prepaid expenses 3,180
Total assets 1,433,458,743
Liabilities  
Payable for:  
Capital shares purchased 12,138,336
Management services fees 28,267
Distribution and/or service fees 7,552
Transfer agent fees 150,198
Compensation of board members 507,471
Compensation of chief compliance officer 16
Other expenses 74,329
Total liabilities 12,906,169
Net assets applicable to outstanding capital stock $1,420,552,574
Represented by  
Paid in capital 856,227,184
Total distributable earnings (loss) 564,325,390
Total - representing net assets applicable to outstanding capital stock $1,420,552,574
Class A  
Net assets $913,904,820
Shares outstanding 51,731,338
Net asset value per share $17.67
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $18.75
Advisor Class  
Net assets $17,808,847
Shares outstanding 887,218
Net asset value per share $20.07
Class C  
Net assets $37,004,319
Shares outstanding 3,261,281
Net asset value per share $11.35
Institutional Class  
Net assets $410,155,790
Shares outstanding 21,148,809
Net asset value per share $19.39
Institutional 2 Class  
Net assets $19,798,367
Shares outstanding 974,758
Net asset value per share $20.31
Institutional 3 Class  
Net assets $874,737
Shares outstanding 44,816
Net asset value per share $19.52
Class R  
Net assets $21,005,694
Shares outstanding 1,183,467
Net asset value per share $17.75
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
11

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $13,257,826
Dividends — affiliated issuers 333,189
Foreign taxes withheld (34,678)
Total income 13,556,337
Expenses:  
Management services fees 10,978,248
Distribution and/or service fees  
Class A 2,393,707
Class C 463,031
Class R 117,995
Transfer agent fees  
Class A 1,183,919
Advisor Class 34,030
Class C 57,596
Institutional Class 567,182
Institutional 2 Class 9,573
Institutional 3 Class 160
Class R 29,248
Compensation of board members 96,157
Custodian fees 14,975
Printing and postage fees 106,538
Registration fees 102,779
Audit fees 25,950
Legal fees 21,447
Compensation of chief compliance officer 322
Other 32,582
Total expenses 16,235,439
Fees waived or expenses reimbursed by Investment Manager and its affiliates (1,155,543)
Expense reduction (1,422)
Total net expenses 15,078,474
Net investment loss (1,522,137)
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 218,109,115
Investments — affiliated issuers 3,591
Net realized gain 218,112,706
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (18,779,755)
Investments — affiliated issuers 41
Net change in unrealized appreciation (depreciation) (18,779,714)
Net realized and unrealized gain 199,332,992
Net increase in net assets resulting from operations $197,810,855
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment loss $(1,522,137) $(2,510,193)
Net realized gain 218,112,706 121,415,653
Net change in unrealized appreciation (depreciation) (18,779,714) (53,833,080)
Net increase in net assets resulting from operations 197,810,855 65,072,380
Distributions to shareholders    
Net investment income and net realized gains    
Class A (91,976,806) (92,700,334)
Advisor Class (2,372,940) (2,500,640)
Class C (6,218,009) (21,242,037)
Institutional Class (39,564,337) (48,574,637)
Institutional 2 Class (1,589,099) (926,044)
Institutional 3 Class (73,495) (39,559)
Class R (2,241,486) (2,480,069)
Class T (432)
Total distributions to shareholders (144,036,172) (168,463,752)
Decrease in net assets from capital stock activity (157,007,442) (113,505,925)
Total decrease in net assets (103,232,759) (216,897,297)
Net assets at beginning of year 1,523,785,333 1,740,682,630
Net assets at end of year $1,420,552,574 $1,523,785,333
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
13

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 2,942,055 53,053,134 13,931,715 255,985,558
Distributions reinvested 3,565,912 63,599,348 3,648,728 62,240,447
Redemptions (8,884,378) (162,380,630) (9,878,792) (175,241,781)
Net increase (decrease) (2,376,411) (45,728,148) 7,701,651 142,984,224
Advisor Class        
Subscriptions 152,256 3,126,971 215,699 4,244,833
Distributions reinvested 117,417 2,371,747 130,158 2,500,242
Redemptions (747,396) (15,204,476) (351,883) (6,956,623)
Net decrease (477,723) (9,705,758) (6,026) (211,548)
Class C        
Subscriptions 180,883 2,159,733 320,078 3,907,106
Distributions reinvested 432,903 5,020,316 1,535,594 19,223,307
Redemptions (2,251,655) (27,388,520) (19,119,904) (248,986,743)
Net decrease (1,637,869) (20,208,471) (17,264,232) (225,856,330)
Institutional Class        
Subscriptions 1,372,045 27,161,104 2,885,192 56,261,008
Distributions reinvested 1,670,174 32,614,073 2,150,109 40,009,637
Redemptions (7,235,914) (144,163,493) (6,961,211) (132,258,738)
Net decrease (4,193,695) (84,388,316) (1,925,910) (35,988,093)
Institutional 2 Class        
Subscriptions 463,220 9,736,148 316,668 6,320,603
Distributions reinvested 77,701 1,588,715 47,893 925,648
Redemptions (200,912) (4,228,728) (185,086) (3,628,917)
Net increase 340,009 7,096,135 179,475 3,617,334
Institutional 3 Class        
Subscriptions 20,334 415,755 30,754 592,956
Distributions reinvested 3,428 67,329 2,123 38,955
Redemptions (20,523) (411,573) (4,535) (87,404)
Net increase 3,239 71,511 28,342 544,507
Class R        
Subscriptions 162,535 3,008,794 240,337 4,380,576
Distributions reinvested 122,734 2,200,623 135,316 2,340,222
Redemptions (507,884) (9,353,812) (293,297) (5,313,149)
Net increase (decrease) (222,615) (4,144,395) 82,356 1,407,649
Class T        
Redemptions (231) (3,668)
Net decrease (231) (3,668)
Total net decrease (8,565,065) (157,007,442) (11,204,575) (113,505,925)
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

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Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
15

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $17.18 (0.03) 2.34 2.31 (1.82) (1.82)
Year Ended 2/28/2019 $18.33 (0.03) 0.75 0.72 (1.87) (1.87)
Year Ended 2/28/2018 $15.74 (0.01) 3.66 3.65 (1.06) (1.06)
Year Ended 2/28/2017 $14.87 0.02 2.84 2.86 (1.99) (1.99)
Year Ended 2/29/2016 $20.50 (0.09) (1.73) (1.82) (3.81) (3.81)
Advisor Class
Year Ended 2/29/2020 $19.26 0.02 2.61 2.63 (1.82) (1.82)
Year Ended 2/28/2019 $20.27 0.02 0.85 0.87 (1.88) (1.88)
Year Ended 2/28/2018 $17.30 0.03 4.03 4.06 (1.09) (1.09)
Year Ended 2/28/2017 $16.13 0.06 3.10 3.16 (1.99) (1.99)
Year Ended 2/29/2016 $21.88 (0.05) (1.89) (1.94) (3.81) (3.81)
Class C
Year Ended 2/29/2020 $11.70 (0.11) 1.58 1.47 (1.82) (1.82)
Year Ended 2/28/2019 $13.14 (0.12) 0.53 0.41 (1.85) (1.85)
Year Ended 2/28/2018 $11.58 (0.10) 2.66 2.56 (1.00) (1.00)
Year Ended 2/28/2017 $11.51 (0.07) 2.13 2.06 (1.99) (1.99)
Year Ended 2/29/2016 $16.81 (0.18) (1.34) (1.52) (3.78) (3.78)
Institutional Class
Year Ended 2/29/2020 $18.66 0.02 2.53 2.55 (1.82) (1.82)
Year Ended 2/28/2019 $19.70 0.02 0.82 0.84 (1.88) (1.88)
Year Ended 2/28/2018 $16.84 0.03 3.92 3.95 (1.09) (1.09)
Year Ended 2/28/2017 $15.74 0.06 3.03 3.09 (1.99) (1.99)
Year Ended 2/29/2016 $21.44 (0.04) (1.85) (1.89) (3.81) (3.81)
Institutional 2 Class
Year Ended 2/29/2020 $19.46 0.03 2.64 2.67 (1.82) (1.82)
Year Ended 2/28/2019 $20.45 0.03 0.86 0.89 (1.88) (1.88)
Year Ended 2/28/2018 $17.44 0.05 4.06 4.11 (1.10) (1.10)
Year Ended 2/28/2017 $16.23 0.08 3.12 3.20 (1.99) (1.99)
Year Ended 2/29/2016 $21.96 (0.01) (1.90) (1.91) (3.82) (3.82)
Institutional 3 Class
Year Ended 2/29/2020 $18.75 0.04 2.55 2.59 (1.82) (1.82)
Year Ended 2/28/2019 $19.77 0.04 0.82 0.86 (1.88) (1.88)
Year Ended 2/28/2018(f) $17.10 0.04 3.74 3.78 (1.11) (1.11)
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $17.67 13.54% 1.12% 1.04%(c) (0.16%) 42% $913,905
Year Ended 2/28/2019 $17.18 4.19% 1.12% 1.08%(c) (0.16%) 23% $929,808
Year Ended 2/28/2018 $18.33 23.65% 1.12% 1.12%(c) (0.07%) 37% $850,411
Year Ended 2/28/2017 $15.74 20.85% 1.18%(d) 1.17%(c),(d) 0.11% 29% $840,034
Year Ended 2/29/2016 $14.87 (11.07%) 1.24%(e) 1.22%(c),(e) (0.46%) 102% $356,035
Advisor Class
Year Ended 2/29/2020 $20.07 13.75% 0.87% 0.79%(c) 0.09% 42% $17,809
Year Ended 2/28/2019 $19.26 4.53% 0.87% 0.83%(c) 0.09% 23% $26,286
Year Ended 2/28/2018 $20.27 23.93% 0.87% 0.87%(c) 0.18% 37% $27,793
Year Ended 2/28/2017 $17.30 21.11% 0.92%(d) 0.92%(c),(d) 0.32% 29% $24,411
Year Ended 2/29/2016 $16.13 (10.88%) 0.98%(e) 0.97%(c),(e) (0.23%) 102% $3,401
Class C
Year Ended 2/29/2020 $11.35 12.66% 1.87% 1.80%(c) (0.91%) 42% $37,004
Year Ended 2/28/2019 $11.70 3.46% 1.86% 1.84%(c) (0.96%) 23% $57,316
Year Ended 2/28/2018 $13.14 22.74% 1.87% 1.87%(c) (0.79%) 37% $291,221
Year Ended 2/28/2017 $11.58 19.89% 1.91%(d) 1.91%(c),(d) (0.63%) 29% $426,640
Year Ended 2/29/2016 $11.51 (11.70%) 1.99%(e) 1.97%(c),(e) (1.21%) 102% $148,420
Institutional Class
Year Ended 2/29/2020 $19.39 13.76% 0.87% 0.79%(c) 0.09% 42% $410,156
Year Ended 2/28/2019 $18.66 4.51% 0.87% 0.83%(c) 0.09% 23% $472,922
Year Ended 2/28/2018 $19.70 23.93% 0.87% 0.87%(c) 0.19% 37% $537,229
Year Ended 2/28/2017 $16.84 21.19% 0.90%(d) 0.90%(c),(d) 0.37% 29% $450,897
Year Ended 2/29/2016 $15.74 (10.87%) 0.98%(e) 0.97%(c),(e) (0.22%) 102% $129,655
Institutional 2 Class
Year Ended 2/29/2020 $20.31 13.81% 0.80% 0.73% 0.16% 42% $19,798
Year Ended 2/28/2019 $19.46 4.60% 0.80% 0.76% 0.17% 23% $12,349
Year Ended 2/28/2018 $20.45 24.04% 0.80% 0.80% 0.26% 37% $9,310
Year Ended 2/28/2017 $17.44 21.23% 0.83%(d) 0.83%(d) 0.46% 29% $8,530
Year Ended 2/29/2016 $16.23 (10.72%) 0.83%(e) 0.83%(e) (0.07%) 102% $4,934
Institutional 3 Class
Year Ended 2/29/2020 $19.52 13.91% 0.76% 0.69% 0.20% 42% $875
Year Ended 2/28/2019 $18.75 4.61% 0.77% 0.71% 0.24% 23% $780
Year Ended 2/28/2018(f) $19.77 22.55% 0.76% 0.76% 0.19% 37% $262
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
17

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class R
Year Ended 2/29/2020 $17.30 (0.07) 2.34 2.27 (1.82) (1.82)
Year Ended 2/28/2019 $18.47 (0.07) 0.76 0.69 (1.86) (1.86)
Year Ended 2/28/2018 $15.87 (0.05) 3.67 3.62 (1.02) (1.02)
Year Ended 2/28/2017(g) $14.69 (0.01) 1.30 1.29 (0.11) (0.11)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) The benefits derived from expense reductions had an impact of less than 0.01%.
(d) Expenses have been reduced due to a reimbursement of expenses overbilled by a third party. If the reimbursement had been excluded, the expense ratios would have been higher by the percentages shown for each class in the table below. All fee waivers and expense reimbursements by the Investment Manager and its affiliates were applied before giving effect to this third party reimbursement.
    
Year Ended Class A Advisor
Class
Class C Institutional
Class
Institutional 2
Class
02/28/2017 0.01% 0.01% 0.01% 0.01% 0.01%
    
(e) Ratios include line of credit interest expense which is less than 0.01%.
(f) Institutional 3 Class shares commenced operations on March 1, 2017. Per share data and total return reflect activity from that date.
(g) Class R shares commenced operations on October 26, 2016. Per share data and total return reflect activity from that date.
(h) Annualized.
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class R
Year Ended 2/29/2020 $17.75 13.20% 1.37% 1.30%(c) (0.41%) 42% $21,006
Year Ended 2/28/2019 $17.30 4.00% 1.37% 1.33%(c) (0.41%) 23% $24,324
Year Ended 2/28/2018 $18.47 23.28% 1.37% 1.37%(c) (0.31%) 37% $24,453
Year Ended 2/28/2017(g) $15.87 8.81% 1.35%(h) 1.35%(c),(h) (0.14%)(h) 29% $26,278
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
19

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Large Cap Growth Opportunity Fund (formerly known as Columbia Large Cap Growth Fund III) (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Effective January 10, 2020, Columbia Large Cap Growth Fund III was renamed Columbia Large Cap Growth Opportunity Fund.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
20 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
21

Notes to Financial Statements  (continued)
February 29, 2020
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.77% to 0.57% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.72% of the Fund’s average daily net assets.
Participating Affiliates
The Investment Manager and its investment advisory affiliates (Participating Affiliates) around the world may coordinate in providing services to their clients. From time to time the Investment Manager (or any affiliated investment subadviser to the Fund, as the case may be) may engage its Participating Affiliates to provide a variety of services such as investment research, investment monitoring, trading and discretionary investment management (including portfolio management) to certain accounts managed by the Investment Manager, including the Fund. These Participating Affiliates provide services to the Investment Manager (or any affiliated investment subadviser to the Fund as the case may be) either pursuant to subadvisory agreements, personnel-sharing agreements or similar inter-company arrangements and the Fund pays no additional fees and expenses as a result of any such arrangements.
These Participating Affiliates, like the Investment Manager, are direct or indirect subsidiaries of Ameriprise Financial and are registered, as appropriate, with respective regulators in their home jurisdictions and, where required, the Securities and Exchange Commission and the Commodity Futures Trading Commission in the United States.
22 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Pursuant to some of these arrangements, certain employees of these Participating Affiliates may serve as "associated persons" of the Investment Manager and, in this capacity, subject to the oversight and supervision of the Investment Manager and consistent with the investment objectives, policies and limitations set forth in the Fund’s prospectus and Statement of Additional Information (SAI), may provide such services to the Fund on behalf of the Investment Manager.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.12
Advisor Class 0.12
Class C 0.12
Institutional Class 0.12
Institutional 2 Class 0.06
Institutional 3 Class 0.02
Class R 0.12
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $1,422.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 111,245
Class C 1.00(b) 1,364
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  Fee rate(s) contractual
through
June 30, 2020
Class A 1.05%
Advisor Class 0.80
Class C 1.80
Institutional Class 0.80
Institutional 2 Class 0.73
Institutional 3 Class 0.69
Class R 1.30
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated
24 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. In addition to the contractual agreement, the Investment Manager and certain of its affiliates have voluntarily agreed to waive fees and/or reimburse Fund expenses (excluding certain fees and expenses described above) so that Fund level expenses (expenses directly attributable to the Fund and not to a specific share class) are waived proportionately across all share classes, but the Fund’s net operating expenses shall not exceed the contractual annual rates listed in the table above. This arrangement may be revised or discontinued at any time. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, late-year ordinary losses and net operating loss reclassification. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Excess of distributions
over net investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
1,215,444 (1,215,444)
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
144,036,172 144,036,172 1,490,192 166,973,560 168,463,752
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
99,719,739 465,639,507
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
966,333,466 512,790,228 (47,150,721) 465,639,507
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Under current tax rules, regulated investment companies can elect to treat certain late-year ordinary losses incurred and post-October capital losses (capital losses realized after October 31) as arising on the first day of the following taxable year. As of February 29, 2020, the Fund will elect to treat the following late-year ordinary losses and post-October capital losses as arising on March 1, 2020.
Late year
ordinary losses ($)
Post-October
capital losses ($)
528,411
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $629,537,481 and $913,155,702, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund did not borrow or lend money under the Interfund Program during the year ended February 29, 2020.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in
26 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Information technology sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the information technology sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the information technology sectors are subject to certain risks, including the risk that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. Performance of such companies may be affected by factors including obtaining and protecting patents (or the failure to do so) and significant competitive pressures, including aggressive pricing of their products or services, new market entrants, competition for market share and short product cycles due to an accelerated rate of technological developments. Such competitive pressures may lead to limited earnings and/or falling profit margins. As a result, the value of their securities may fall or fail to rise. In addition, many information technology sector companies have limited operating histories and prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 25.2% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
28 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Large Cap Growth Opportunity Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Large Cap Growth Opportunity Fund (formerly known as Columbia Large Cap Growth Fund III) (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian and transfer agent. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
29

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Capital
gain
dividend
 
$220,423,199  
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
30 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
31

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
32 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020
33

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
34 Columbia Large Cap Growth Opportunity Fund  | Annual Report 2020

[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Large Cap Growth Opportunity Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN186_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Mid Cap Index Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Mid Cap Index Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Mid Cap Index Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks total return before fees and expenses that corresponds to the total return of the Standard & Poor’s (S&P) MidCap 400® Index.
Portfolio management
Christopher Lo, CFA
Lead Portfolio Manager
Managed Fund since 2014
Vadim Shteyn
Portfolio Manager
Managed Fund since 2011
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A 05/31/00 -3.88 5.00 10.59
Institutional Class 03/31/00 -3.59 5.25 10.87
Institutional 2 Class* 11/08/12 -3.65 5.25 10.88
Institutional 3 Class* 03/01/17 -3.59 5.25 10.87
S&P MidCap 400 Index   -3.39 5.49 11.11
All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The S&P MidCap 400 Index is a market-value weighted index that tracks the performance of 400 mid-cap U.S. companies.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Mid Cap Index Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Mid Cap Index Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 99.4
Money Market Funds 0.6
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 2.0
Consumer Discretionary 13.9
Consumer Staples 3.2
Energy 1.4
Financials 16.5
Health Care 10.3
Industrials 15.9
Information Technology 15.8
Materials 5.7
Real Estate 10.8
Utilities 4.5
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Mid Cap Index Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned -3.88%. The Fund closely tracked its benchmark, the unmanaged S&P Mid Cap 400 Index, which returned -3.39% for the same period. Mutual funds, unlike unmanaged indices, incur operating expenses.
U.S. equity markets posted divergent results amid extreme volatility
The 12 months ended February 29, 2020 proved to be volatile for U.S. equities. The annual period began with mixed results, as large cap stocks wobbled modestly higher, while mid-cap and small-cap companies posted negative absolute returns on fears that economic growth was potentially slowing and the impact of U.S.-China trade headlines might be greater than the U.S. Administration was stating. Through the second quarter of 2019, large-cap stocks continued to better weather the “risk off” sentiment, or heightened risk aversion, that dominated these months, as did growth stocks across the capitalization spectrum. Speculation around the market’s hoped-for interest rate cuts from the U.S. Federal Reserve (Fed) contributed to frequent swings in investor optimism.
Day-to-day sentiment about the state of U.S.-China trade relations remained a major factor influencing the U.S. equity markets going into the second half of 2019. Also adding to the list of worries were U.S. recession fears based on weak manufacturing data, uncertainties about global economic growth, several geopolitical hotspots, domestic political turmoil around the impeachment of the U.S. President and the then-diverse and differentiated Democratic presidential candidate campaigns. Toward the end of 2019, however, investor optimism soared. Hopeful expectations surrounding a “Phase 1” trade deal between the U.S. and China, an accommodative Fed and the seemingly persistent resilience of the American consumer led the S&P 500 Index to its best fourth quarter since 2013. Mid-cap and small-cap stocks lagged their large-cap counterparts but also posted a strong fourth calendar quarter.
The optimism seen at the end of the 2019 calendar year continued into the start of the new decade but was derailed quickly by the outbreak of the highly contagious and novel coronavirus first identified in Wuhan, Hubei province in China. As the impact of the coronavirus became more pronounced and fears of a severe pandemic that could cause a global recession grew, markets around the world, including the U.S., sold off dramatically. The S&P 500 Index lost almost 11.5% in the last week of February 2020 alone, its biggest weekly decline since October 2008. Mid-cap and small-cap companies struggled similarly.
Still, even with the sharp decline in February 2020, the S&P 500 Index ended the annual period up 8.19%. However, amid heightened volatility and risk aversion, mid-cap and small-cap stocks significantly underperformed large-cap stocks, with the S&P Mid Cap 400 Index and the S&P Small Cap 600 Index posting returns of -3.39% and -7.68%, respectively, for the same annual period.
S&P Mid Cap 400 Index returns hampered most by energy sector
Only two of the eleven sectors of the S&P Mid Cap 400 Index posted a positive return during the 12 months that ended February 29, 2020. In terms of total return, information technology and real estate were the best relative performers, followed by consumer discretionary, which posted a modest negative absolute return. On the basis of impact, which takes weighting and total returns into account, information technology and real estate were again the best relative performers, followed by industrials, which posted a modest negative absolute return. The top performing industries on the basis of total return were air freight and logistics; distributors; aerospace and defense; household durables; and water utilities, each of which posted a positive double-digit return during the annual period.
Conversely, energy was by far the weakest sector from both a total return perspective and on the basis of impact. Materials and communication services also posted weak total returns. Financials and materials were the next weakest sectors on the basis of impact. The worst performing industries for the annual period on the basis of total return were energy equipment and services; oil, gas and consumable fuels; personal products; interactive media and services; and multiline retail.
Top individual contributors within the S&P Mid Cap 400 Index during the annual period included local government-focused software provider Tyler Technologies, Inc.; aerospace and defense company Teledyne Technologies, Inc.; technology services provider Fair Isaac Corp.; quick-service restaurant owner and franchiser Domino’s Pizza, Inc.; and homebuilder and
Columbia Mid Cap Index Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
mortgage-related services provider NVR, Inc.. Top detractors were chemicals manufacturer Chemours Co. LLC; utilities company UGI Corp.; integrated natural gas company EQT Corp.; database management company Teradata Corp.; and oil and gas exploration and production company Chesapeake Energy Corp.
Financials was the largest sector by weighting in the S&P Mid Cap 400 Index, with a weighting of 16.45% as of February 29, 2020. As always, each sector and stock in the S&P Mid Cap 400 Index was represented in the Fund with approximately the same weighting as in the Index and therefore had a similar effect.
Index additions and deletions drove Fund portfolio changes
During the annual period, there were 52 additions and 52 deletions to the Index and the Fund’s portfolio. Among those stocks added to the Index and Fund were XPO Logistics, Inc., Trex Company, Inc., Brighthouse Financial Inc., PS Business Parks, Inc., Fluor Corp., Mattel, Inc., Foot Locker, Inc., GrubHub, Inc., Park Hotels & Resorts, Inc., Etsy, Inc., Owens Corning, Pilgrim’s Pride Corp., Repligen Corp., Nektar Therapeutics, SolarEdge Technologies, Inc., BJ’s Wholesale Club Holdings, Inc., Choice Hotels International, Inc., Columbia Sportswear Co., TripAdvisor, Inc., CIT Group, Inc, and Generac Holdings, Inc. Deletions included Sotheby’s, Big Lots, Inc., Cars.com Inc, Diamond Offshore Drilling, Inc., Esterline Technologies Corp., IDEX Corp., Inogen, Inc., International Speedway Corp., Live Nation Entertainment, Inc., Medidata Solutions, Inc., Mallinckrodt PLC, NVR, Old Dominion Freight Line, Inc., Pitney Bowes, Inc., Realogy Holdings Corp., Range Resources Corp., Signet Jewelers Ltd., Tanger Factory Outlet Centers, Inc., Tupperware Brands Corp., WR Berkley Corp. and Zebra Technologies Corp.
We do not anticipate any changes in the portfolio beyond the customary quarterly rebalancings and stock substitutions we make to align the Fund with the S&P Mid Cap 400 Index.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Investments in mid-cap companies involve risks and volatility greater than investments in larger, more established companies. The Fund’s net value will generally decline when the performance of its targeted index declines. Investing in derivatives is a specialized activity that involves special risks, which may result in significant losses. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Mid Cap Index Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 970.00 1,022.63 2.20 2.26 0.45
Institutional Class 1,000.00 1,000.00 971.30 1,023.87 0.98 1.01 0.20
Institutional 2 Class 1,000.00 1,000.00 971.20 1,023.87 0.98 1.01 0.20
Institutional 3 Class 1,000.00 1,000.00 971.40 1,023.87 0.98 1.01 0.20
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Mid Cap Index Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 99.4%
Issuer Shares Value ($)
Communication Services 2.0%
Entertainment 0.3%
Cinemark Holdings, Inc. 215,063 5,583,035
World Wrestling Entertainment, Inc., Class A 95,740 4,477,760
Total   10,060,795
Interactive Media & Services 0.3%
TripAdvisor, Inc. 211,960 4,970,462
Yelp, Inc.(a) 128,880 4,030,078
Total   9,000,540
Media 1.3%
AMC Networks, Inc., Class A(a) 88,914 2,756,334
Cable One, Inc. 10,134 15,940,985
John Wiley & Sons, Inc., Class A 88,254 3,282,166
Meredith Corp. 81,098 2,136,932
New York Times Co. (The), Class A 289,999 10,863,363
TEGNA, Inc. 437,570 6,266,002
Total   41,245,782
Wireless Telecommunication Services 0.1%
Telephone & Data Systems, Inc. 197,305 3,973,723
Total Communication Services 64,280,840
Consumer Discretionary 13.8%
Auto Components 1.4%
Adient PLC(a) 175,610 4,202,347
Dana, Inc. 290,350 4,175,233
Delphi Technologies PLC(a) 173,640 2,451,797
Gentex Corp. 510,326 13,625,704
Goodyear Tire & Rubber Co. (The) 469,160 4,543,815
Lear Corp. 111,010 12,344,312
Visteon Corp.(a) 56,410 3,668,906
Total   45,012,114
Automobiles 0.3%
Thor Industries, Inc. 111,354 8,397,205
Distributors 0.5%
Pool Corp. 80,770 17,039,239
Common Stocks (continued)
Issuer Shares Value ($)
Diversified Consumer Services 1.1%
Adtalem Global Education, Inc.(a) 108,928 3,362,607
Graham Holdings Co., Class B 8,772 4,411,263
Grand Canyon Education, Inc.(a) 97,290 7,849,357
Service Corp. International 368,731 17,621,655
WW International, Inc.(a) 93,710 2,811,300
Total   36,056,182
Hotels, Restaurants & Leisure 4.5%
Boyd Gaming Corp. 161,470 4,312,864
Brinker International, Inc. 75,389 2,589,612
Caesars Entertainment Corp.(a) 1,125,950 14,310,825
Cheesecake Factory, Inc. (The) 82,835 2,951,411
Choice Hotels International, Inc. 64,080 5,849,222
Churchill Downs, Inc. 71,520 8,985,773
Cracker Barrel Old Country Store, Inc. 48,540 6,957,238
Domino’s Pizza, Inc. 78,040 26,491,459
Dunkin’ Brands Group, Inc. 167,120 11,116,822
Eldorado Resorts, Inc.(a) 131,790 6,613,222
Jack in the Box, Inc. 47,710 3,285,311
Marriott Vacations Worldwide Corp. 75,479 7,304,858
Papa John’s International, Inc. 44,470 2,561,917
Penn National Gaming, Inc.(a) 219,810 6,499,782
Scientific Games Corp., Class A(a) 109,110 1,990,166
Six Flags Entertainment Corp. 158,580 4,008,902
Texas Roadhouse, Inc. 131,620 7,399,676
Wendy’s Co. (The) 371,268 7,009,540
Wyndham Destinations, Inc. 182,980 7,300,902
Wyndham Hotels & Resorts, Inc. 191,980 9,781,381
Total   147,320,883
Household Durables 1.2%
Helen of Troy Ltd.(a) 50,760 8,355,096
KB Home 172,826 5,632,399
Taylor Morrison Home Corp., Class A(a) 266,820 6,008,786
Tempur Sealy International, Inc.(a) 91,664 6,851,884
Toll Brothers, Inc. 243,516 9,017,398
TRI Pointe Group, Inc.(a) 280,890 4,306,044
Total   40,171,607
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Mid Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Internet & Direct Marketing Retail 0.7%
Etsy, Inc.(a) 239,030 13,818,324
GrubHub, Inc.(a) 184,480 8,875,333
Total   22,693,657
Leisure Products 0.8%
Brunswick Corp. 164,560 8,754,592
Mattel, Inc.(a) 699,440 8,246,398
Polaris, Inc. 116,004 9,573,810
Total   26,574,800
Multiline Retail 0.2%
Dillard’s, Inc., Class A 19,890 1,119,608
Ollie’s Bargain Outlet Holdings, Inc.(a) 110,320 5,611,979
Total   6,731,587
Specialty Retail 2.1%
Aaron’s, Inc. 135,469 5,327,996
American Eagle Outfitters, Inc. 320,404 4,126,804
AutoNation, Inc.(a) 118,780 5,075,469
Bed Bath & Beyond, Inc. 255,330 2,760,117
Dick’s Sporting Goods, Inc. 128,290 4,671,039
Five Below, Inc.(a) 112,310 10,888,454
Foot Locker, Inc. 215,930 7,827,462
Murphy U.S.A., Inc.(a) 58,330 5,687,175
Restoration Hardware Holdings, Inc.(a) 32,960 5,978,944
Sally Beauty Holdings, Inc.(a) 234,670 2,919,295
Urban Outfitters, Inc.(a) 142,310 3,345,708
Williams-Sonoma, Inc. 156,568 9,768,278
Total   68,376,741
Textiles, Apparel & Luxury Goods 1.0%
Carter’s, Inc. 89,062 8,146,501
Columbia Sportswear Co. 58,580 4,762,554
Deckers Outdoor Corp.(a) 56,442 9,809,620
Skechers U.S.A., Inc., Class A(a) 270,150 8,936,562
Total   31,655,237
Total Consumer Discretionary 450,029,252
Consumer Staples 3.1%
Beverages 0.2%
Boston Beer Co., Inc. (The), Class A(a) 18,590 6,892,986
Common Stocks (continued)
Issuer Shares Value ($)
Food & Staples Retailing 0.6%
BJ’s Wholesale Club Holdings, Inc.(a) 246,450 4,746,627
Casey’s General Stores, Inc. 74,200 12,096,084
Sprouts Farmers Market, Inc.(a) 238,330 3,808,514
Total   20,651,225
Food Products 1.9%
Darling Ingredients, Inc.(a) 330,260 8,487,682
Flowers Foods, Inc. 388,291 8,359,905
Hain Celestial Group, Inc. (The)(a) 162,070 3,845,921
Ingredion, Inc. 134,686 11,219,344
Lancaster Colony Corp. 39,925 5,767,166
Pilgrim’s Pride Corp.(a) 105,730 2,237,247
Post Holdings, Inc.(a) 134,081 13,577,042
Sanderson Farms, Inc. 39,770 4,913,981
Tootsie Roll Industries, Inc. 33,849 1,085,876
TreeHouse Foods, Inc.(a) 113,400 4,321,674
Total   63,815,838
Household Products 0.2%
Energizer Holdings, Inc. 129,783 5,579,371
Personal Products 0.2%
Edgewell Personal Care Co.(a) 109,353 3,319,957
Nu Skin Enterprises, Inc., Class A 112,060 2,747,711
Total   6,067,668
Total Consumer Staples 103,007,088
Energy 1.4%
Energy Equipment & Services 0.3%
Apergy Corp.(a) 156,260 2,906,436
Core Laboratories NV 89,520 2,402,717
Patterson-UTI Energy, Inc. 392,453 2,248,756
Transocean Ltd.(a) 1,160,270 3,886,904
Total   11,444,813
Oil, Gas & Consumable Fuels 1.1%
Antero Midstream Corp. 599,180 2,612,425
Chesapeake Energy Corp.(a) 2,365,320 650,463
CNX Resources Corp.(a) 376,410 1,998,737
EQT Corp. 515,720 3,027,276
Equitrans Midstream Corp. 411,120 2,902,507
Matador Resources Co.(a) 221,190 2,132,272
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Murphy Oil Corp. 301,330 5,680,070
PBF Energy, Inc., Class A 205,500 4,601,145
World Fuel Services Corp. 131,920 3,730,698
WPX Energy, Inc.(a) 840,710 7,843,824
Total   35,179,417
Total Energy 46,624,230
Financials 16.4%
Banks 6.9%
Associated Banc-Corp. 321,449 5,442,132
BancorpSouth Bank 193,570 4,736,658
Bank of Hawaii Corp. 81,246 6,046,327
Bank OZK 243,870 6,191,859
Cathay General Bancorp 152,755 4,701,799
CIT Group, Inc. 191,090 7,588,184
Commerce Bancshares, Inc. 209,216 12,770,545
Cullen/Frost Bankers, Inc. 114,859 9,003,797
East West Bancorp, Inc. 293,777 11,380,921
First Financial Bankshares, Inc. 274,050 7,876,197
First Horizon National Corp. 627,750 8,367,907
FNB Corp. 655,480 6,613,793
Fulton Financial Corp. 331,085 4,784,178
Hancock Whitney Corp. 175,941 5,894,023
Home Bancshares, Inc. 313,010 5,246,048
International Bancshares Corp. 115,742 3,946,802
PacWest Bancorp 241,740 7,648,654
Pinnacle Financial Partners, Inc. 145,190 7,642,802
Prosperity Bancshares, Inc. 190,445 12,302,747
Signature Bank 108,911 13,624,766
Sterling Bancorp 407,590 6,757,842
Synovus Financial Corp. 295,635 8,579,328
TCF Financial Corp. 309,474 11,277,233
Texas Capital Bancshares, Inc.(a) 101,510 4,779,091
Trustmark Corp. 129,630 3,487,047
UMB Financial Corp. 87,150 5,067,773
Umpqua Holdings Corp. 444,250 6,837,007
United Bankshares, Inc. 204,820 5,915,202
Valley National Bancorp 790,161 7,348,497
Common Stocks (continued)
Issuer Shares Value ($)
Webster Financial Corp. 185,655 7,049,320
Wintrust Financial Corp. 115,130 6,149,093
Total   225,057,572
Capital Markets 2.8%
Affiliated Managers Group, Inc. 99,400 7,476,868
Eaton Vance Corp. 228,252 9,417,678
Evercore, Inc., Class A 78,850 5,252,987
Factset Research Systems, Inc. 76,544 20,359,939
Federated Hermes, Inc., Class B 193,810 5,591,418
Interactive Brokers Group, Inc., Class A 154,830 7,911,813
Janus Henderson Group PLC 313,927 6,655,252
Legg Mason, Inc. 164,600 8,200,372
SEI Investments Co. 254,615 13,929,987
Stifel Financial Corp. 137,930 7,508,909
Total   92,305,223
Consumer Finance 0.7%
FirstCash, Inc. 86,100 6,622,812
LendingTree, Inc.(a) 15,470 4,266,936
Navient Corp. 392,400 4,406,652
SLM Corp. 851,660 8,831,714
Total   24,128,114
Diversified Financial Services 0.3%
Jefferies Financial Group, Inc. 482,550 9,511,060
Insurance 5.2%
Alleghany Corp.(a) 29,038 19,520,795
American Financial Group, Inc. 150,987 13,954,219
Brighthouse Financial, Inc.(a) 220,420 7,899,853
Brown & Brown, Inc. 471,756 20,290,226
CNO Financial Group, Inc. 304,900 4,884,498
First American Financial Corp. 226,615 12,939,716
Genworth Financial, Inc., Class A(a) 1,015,350 3,959,865
Hanover Insurance Group, Inc. (The) 79,470 9,420,374
Kemper Corp. 126,381 8,700,068
Mercury General Corp. 54,721 2,369,967
Old Republic International Corp. 575,656 11,351,936
Primerica, Inc. 83,435 9,289,653
Reinsurance Group of America, Inc. 126,309 15,413,487
RenaissanceRe Holdings Ltd. 89,090 15,180,936
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Mid Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
RLI Corp. 80,500 6,470,590
Selective Insurance Group, Inc. 119,830 6,684,117
Total   168,330,300
Thrifts & Mortgage Finance 0.5%
New York Community Bancorp, Inc. 942,804 10,191,711
Washington Federal, Inc. 158,049 4,739,890
Total   14,931,601
Total Financials 534,263,870
Health Care 10.2%
Biotechnology 1.0%
Arrowhead Pharmaceuticals, Inc.(a) 201,950 7,140,952
Exelixis, Inc.(a) 612,960 11,394,927
Ligand Pharmaceuticals, Inc.(a) 35,430 3,316,248
United Therapeutics Corp.(a) 88,518 9,113,813
Total   30,965,940
Health Care Equipment & Supplies 3.6%
Avanos Medical, Inc.(a) 96,690 3,133,723
Cantel Medical Corp. 75,590 4,769,729
Globus Medical, Inc., Class A(a) 155,280 7,023,314
Haemonetics Corp.(a) 102,240 11,075,659
Hill-Rom Holdings, Inc. 134,684 12,936,398
ICU Medical, Inc.(a) 38,790 7,595,470
Integra LifeSciences Holdings Corp.(a) 143,770 7,490,417
LivaNova PLC(a) 97,640 6,807,461
Masimo Corp.(a) 98,970 16,164,770
NuVasive, Inc.(a) 105,050 6,913,341
Penumbra, Inc.(a) 64,800 10,747,728
West Pharmaceutical Services, Inc. 149,260 22,472,586
Total   117,130,596
Health Care Providers & Services 2.5%
Acadia Healthcare Co., Inc.(a) 178,680 5,288,928
Amedisys, Inc.(a) 65,070 11,322,831
Chemed Corp. 32,300 13,489,126
Encompass Health Corp. 198,910 14,886,424
HealthEquity, Inc.(a) 142,990 10,150,860
Mednax, Inc.(a) 170,062 2,906,360
Molina Healthcare, Inc.(a) 126,490 15,501,349
Common Stocks (continued)
Issuer Shares Value ($)
Patterson Companies, Inc. 173,790 4,134,464
Tenet Healthcare Corp.(a) 209,590 5,508,025
Total   83,188,367
Health Care Technology 0.1%
Allscripts Healthcare Solutions, Inc.(a) 327,543 2,469,674
Life Sciences Tools & Services 2.2%
Bio-Rad Laboratories, Inc., Class A(a) 43,591 15,344,904
Bio-Techne Corp. 76,881 14,522,052
Charles River Laboratories International, Inc.(a) 98,528 15,328,001
Pra Health Sciences, Inc.(a) 127,590 12,018,978
Repligen Corp.(a) 94,520 8,090,912
Syneos Health, Inc.(a) 125,630 7,958,660
Total   73,263,507
Pharmaceuticals 0.8%
Catalent, Inc.(a) 312,190 16,087,151
Nektar Therapeutics(a) 354,890 7,385,261
Prestige Consumer Healthcare, Inc.(a) 101,340 3,786,062
Total   27,258,474
Total Health Care 334,276,558
Industrials 15.8%
Aerospace & Defense 1.6%
Axon Enterprise, Inc.(a) 119,710 9,261,963
Curtiss-Wright Corp. 86,120 10,329,233
Mercury Systems, Inc.(a) 112,040 8,230,458
Teledyne Technologies, Inc.(a) 73,570 24,816,632
Total   52,638,286
Air Freight & Logistics 0.4%
XPO Logistics, Inc.(a) 186,200 13,773,214
Airlines 0.3%
JetBlue Airways Corp.(a) 582,396 9,190,209
Building Products 1.3%
Lennox International, Inc. 70,732 16,136,091
Owens Corning 219,460 12,397,295
Resideo Technologies, Inc.(a) 247,770 2,663,528
Trex Company, Inc.(a) 117,690 11,257,049
Total   42,453,963
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
11

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Commercial Services & Supplies 1.9%
Brink’s Co. (The) 100,920 7,901,027
Clean Harbors, Inc.(a) 103,580 7,200,882
Deluxe Corp. 84,932 2,828,236
Healthcare Services Group, Inc. 149,520 4,117,781
Herman Miller, Inc. 119,139 4,079,319
HNI Corp. 86,395 2,836,348
KAR Auction Services, Inc. 259,780 5,000,765
MSA Safety, Inc. 71,896 8,747,586
Stericycle, Inc.(a) 183,840 10,557,931
Tetra Tech, Inc. 110,120 8,905,404
Total   62,175,279
Construction & Engineering 1.2%
AECOM(a) 316,895 14,241,261
Dycom Industries, Inc.(a) 63,590 1,879,720
EMCOR Group, Inc. 113,280 8,713,498
Fluor Corp. 282,780 2,635,510
MasTec, Inc.(a) 121,650 5,970,582
Valmont Industries, Inc. 43,421 5,046,389
Total   38,486,960
Electrical Equipment 1.7%
Acuity Brands, Inc. 79,930 8,221,600
EnerSys 85,310 5,253,390
Generac Holdings, Inc.(a) 126,170 12,994,248
Hubbell, Inc. 109,715 14,618,427
nVent Electric PLC 313,930 7,537,459
Regal Beloit Corp. 82,594 6,412,598
Total   55,037,722
Industrial Conglomerates 0.5%
Carlisle Companies, Inc. 114,324 16,610,134
Machinery 4.3%
AGCO Corp. 126,451 7,641,434
Colfax Corp.(a) 168,660 5,645,050
Crane Co. 102,845 6,988,318
Donaldson Co., Inc. 255,315 11,509,600
Graco, Inc. 336,456 16,594,010
ITT, Inc. 176,922 10,641,858
Kennametal, Inc. 167,146 4,646,659
Common Stocks (continued)
Issuer Shares Value ($)
Lincoln Electric Holdings, Inc. 123,355 10,101,541
Nordson Corp. 103,216 14,997,285
Oshkosh Corp. 137,290 9,905,474
Terex Corp. 132,325 2,912,473
Timken Co. (The) 136,755 6,132,094
Toro Co. (The) 215,050 15,361,021
Trinity Industries, Inc. 197,996 4,029,219
Woodward, Inc. 113,757 11,739,722
Total   138,845,758
Marine 0.2%
Kirby Corp.(a) 120,938 7,709,797
Professional Services 0.9%
ASGN, Inc.(a) 106,520 5,401,629
FTI Consulting, Inc.(a) 75,910 8,546,707
Insperity, Inc. 75,850 5,102,430
ManpowerGroup, Inc. 118,947 9,032,835
Total   28,083,601
Road & Rail 0.8%
Avis Budget Group, Inc.(a) 114,680 3,712,765
Knight-Swift Transportation Holdings, Inc. 247,860 7,916,649
Landstar System, Inc. 79,608 8,038,020
Ryder System, Inc. 107,510 4,089,680
Werner Enterprises, Inc. 89,354 3,002,294
Total   26,759,408
Trading Companies & Distributors 0.7%
GATX Corp. 70,808 5,064,896
MSC Industrial Direct Co., Inc., Class A 90,870 5,617,583
NOW, Inc.(a) 219,490 1,938,097
Watsco, Inc. 65,863 10,339,174
Total   22,959,750
Total Industrials 514,724,081
 
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Mid Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Information Technology 15.7%
Communications Equipment 1.2%
Ciena Corp.(a) 312,072 11,999,168
InterDigital, Inc. 62,804 3,321,704
Lumentum Holdings, Inc.(a) 155,740 12,119,687
Netscout Systems, Inc.(a) 132,860 3,414,502
Viasat, Inc.(a) 116,340 6,689,550
Total   37,544,611
Electronic Equipment, Instruments & Components 3.6%
Arrow Electronics, Inc.(a) 164,306 11,018,360
Avnet, Inc. 203,670 6,248,596
Belden, Inc. 77,950 3,112,543
Cognex Corp. 344,760 15,355,610
Coherent, Inc.(a) 48,720 6,270,751
II-VI, Inc.(a) 175,940 5,223,659
Jabil, Inc. 280,240 8,981,692
Littelfuse, Inc. 49,140 7,846,675
National Instruments Corp. 237,956 9,584,868
SYNNEX Corp. 82,430 10,306,223
Tech Data Corp.(a) 71,464 10,175,759
Trimble Navigation Ltd.(a) 502,588 19,842,174
Vishay Intertechnology, Inc. 266,988 4,992,676
Total   118,959,586
IT Services 2.4%
CACI International, Inc., Class A(a) 50,520 12,378,410
CoreLogic, Inc. 160,417 7,278,119
KBR, Inc. 285,887 7,421,627
LiveRamp Holdings, Inc.(a) 136,563 4,839,793
MAXIMUS, Inc. 129,070 8,133,991
Perspecta, Inc. 277,400 6,926,678
Sabre Corp. 552,520 7,522,560
Science Applications International Corp. 98,984 7,931,588
WEX, Inc.(a) 87,327 16,351,108
Total   78,783,874
Common Stocks (continued)
Issuer Shares Value ($)
Semiconductors & Semiconductor Equipment 4.2%
Cabot Microelectronics Corp. 58,710 8,177,129
Cirrus Logic, Inc.(a) 116,600 8,003,424
Cree, Inc.(a) 217,288 9,719,292
Cypress Semiconductor Corp. 745,032 17,202,789
First Solar, Inc.(a) 153,100 7,007,387
MKS Instruments, Inc. 109,970 11,017,894
Monolithic Power Systems, Inc. 81,500 12,929,160
Semtech Corp.(a) 133,640 5,277,444
Silicon Laboratories, Inc.(a) 87,502 7,759,677
SolarEdge Technologies, Inc.(a) 98,060 12,230,043
Synaptics, Inc.(a) 67,510 4,459,035
Teradyne, Inc. 338,060 19,864,406
Universal Display Corp. 85,530 13,581,309
Total   137,228,989
Software 4.1%
ACI Worldwide, Inc.(a) 233,198 6,499,228
Blackbaud, Inc. 99,220 6,727,116
CDK Global, Inc. 244,900 11,270,298
Ceridian HCM Holding, Inc.(a) 203,320 14,380,824
CommVault Systems, Inc.(a) 84,835 3,537,619
Fair Isaac Corp.(a) 58,422 21,968,425
j2 Global, Inc. 93,390 8,155,749
LogMeIn, Inc. 98,480 8,393,943
Manhattan Associates, Inc.(a) 128,910 8,683,378
PTC, Inc.(a) 209,690 15,842,079
Teradata Corp.(a) 226,950 4,525,383
Tyler Technologies, Inc.(a) 78,650 24,644,977
Total   134,629,019
Technology Hardware, Storage & Peripherals 0.2%
NCR Corp.(a) 257,410 6,486,732
Total Information Technology 513,632,811
Materials 5.7%
Chemicals 2.4%
Ashland Global Holdings, Inc. 121,500 8,692,110
Cabot Corp. 114,939 4,296,420
Chemours Co. LLC (The) 329,840 4,901,422
Ingevity Corp.(a) 84,370 3,800,025
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
13

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Minerals Technologies, Inc. 70,315 3,155,034
NewMarket Corp. 14,893 5,787,271
Olin Corp. 322,113 5,215,009
PolyOne Corp. 182,060 4,507,806
RPM International, Inc. 261,611 16,771,881
Scotts Miracle-Gro Co. (The), Class A 79,927 8,471,463
Sensient Technologies Corp. 85,370 4,198,497
Valvoline, Inc. 380,057 7,411,111
Total   77,208,049
Construction Materials 0.2%
Eagle Materials, Inc. 83,980 6,628,542
Containers & Packaging 1.0%
AptarGroup, Inc. 128,962 13,034,189
Greif, Inc., Class A 52,973 1,872,066
O-I Glass, Inc. 313,960 3,390,768
Silgan Holdings, Inc. 156,420 4,478,305
Sonoco Products Co. 201,936 9,735,334
Total   32,510,662
Metals & Mining 1.8%
Allegheny Technologies, Inc.(a) 254,360 4,347,012
Carpenter Technology Corp. 96,272 3,537,996
Commercial Metals Co. 239,352 4,370,567
Compass Minerals International, Inc. 68,354 3,728,711
Reliance Steel & Aluminum Co. 134,471 13,755,039
Royal Gold, Inc. 132,325 12,765,393
Steel Dynamics, Inc. 434,639 11,574,437
United States Steel Corp. 343,020 2,751,020
Worthington Industries, Inc. 74,460 2,367,828
Total   59,198,003
Paper & Forest Products 0.3%
Domtar Corp. 115,536 3,323,971
Louisiana-Pacific Corp. 236,947 6,741,142
Total   10,065,113
Total Materials 185,610,369
Common Stocks (continued)
Issuer Shares Value ($)
Real Estate 10.8%
Equity Real Estate Investment Trusts (REITS) 10.3%
American Campus Communities, Inc. 277,193 12,041,264
Brixmor Property Group, Inc. 600,860 10,941,661
Camden Property Trust 195,347 20,702,875
CoreCivic, Inc. 240,255 3,558,177
Coresite Realty Corp. 76,030 7,886,592
Corporate Office Properties Trust 226,061 5,728,386
Cousins Properties, Inc. 296,065 10,566,560
CyrusOne, Inc. 228,360 13,834,049
Diversified Healthcare Trust 479,925 3,018,728
Douglas Emmett, Inc. 332,510 12,695,232
EastGroup Properties, Inc. 77,490 9,742,818
EPR Properties 158,280 9,376,507
First Industrial Realty Trust, Inc. 256,100 9,859,850
GEO Group, Inc. (The) 244,655 3,581,749
Healthcare Realty Trust, Inc. 269,790 9,253,797
Highwoods Properties, Inc. 209,284 9,392,666
JBG SMITH Properties 238,110 8,733,875
Kilroy Realty Corp. 196,755 14,302,121
Lamar Advertising Co., Class A 173,509 14,529,644
Life Storage, Inc. 94,110 10,155,410
Macerich Co. (The) 222,280 4,538,958
Mack-Cali Realty Corp. 182,678 3,467,228
Medical Properties Trust, Inc. 1,043,850 22,056,550
National Retail Properties, Inc. 346,248 17,606,711
Omega Healthcare Investors, Inc. 440,790 17,455,284
Park Hotels & Resorts, Inc. 482,920 8,818,119
Pebblebrook Hotel Trust 263,533 5,326,002
PotlatchDeltic Corp. 135,605 4,982,128
PS Business Parks, Inc. 40,410 6,002,905
Rayonier, Inc. 260,865 6,920,748
Sabra Health Care REIT, Inc. 390,759 7,639,338
Service Properties Trust 331,983 6,002,253
Spirit Realty Capital, Inc. 201,190 9,154,145
Taubman Centers, Inc. 123,499 6,429,358
Urban Edge Properties 232,320 3,763,584
Weingarten Realty Investors 244,007 6,571,108
Total   336,636,380
 
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Mid Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Real Estate Management & Development 0.5%
Jones Lang LaSalle, Inc. 103,968 15,363,351
Total Real Estate 351,999,731
Utilities 4.5%
Electric Utilities 1.5%
Allete, Inc. 104,230 7,190,828
Hawaiian Electric Industries, Inc. 219,836 9,417,774
IDACORP, Inc. 101,669 9,825,292
OGE Energy Corp. 403,818 15,385,466
PNM Resources, Inc. 160,690 7,565,285
Total   49,384,645
Gas Utilities 1.6%
National Fuel Gas Co. 174,145 6,375,448
New Jersey Resources Corp. 192,660 6,802,825
ONE Gas, Inc. 106,390 8,738,874
Southwest Gas Holdings, Inc. 110,200 7,127,736
Spire, Inc. 102,840 7,718,142
UGI Corp. 421,641 15,195,942
Total   51,958,967
Common Stocks (continued)
Issuer Shares Value ($)
Multi-Utilities 0.8%
Black Hills Corp. 123,972 8,950,778
MDU Resources Group, Inc. 404,246 11,209,742
NorthWestern Corp. 101,770 7,158,502
Total   27,319,022
Water Utilities 0.6%
Essential Utilities, Inc. 435,428 18,727,758
Total Utilities 147,390,392
Total Common Stocks
(Cost $2,440,660,139)
3,245,839,222
Money Market Funds 0.6%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(b),(c) 20,517,021 20,517,021
Total Money Market Funds
(Cost $20,516,327)
20,517,021
Total Investments in Securities
(Cost: $2,461,176,466)
3,266,356,243
Other Assets & Liabilities, Net   718,236
Net Assets 3,267,074,479
 
At February 29, 2020, securities and/or cash totaling $1,587,900 were pledged as collateral.
Investments in derivatives
Long futures contracts
Description Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
S&P Mid 400 Index E-mini 141 03/2020 USD 25,552,020 (3,502,244)
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) The rate shown is the seven-day current annualized yield at February 29, 2020.
(c) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  53,663,946 770,651,955 (803,798,880) 20,517,021 8,783 694 832,287 20,517,021
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
15

Portfolio of Investments  (continued)
February 29, 2020
Currency Legend
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 64,280,840 64,280,840
Consumer Discretionary 450,029,252 450,029,252
Consumer Staples 103,007,088 103,007,088
Energy 46,624,230 46,624,230
Financials 534,263,870 534,263,870
Health Care 334,276,558 334,276,558
Industrials 514,724,081 514,724,081
Information Technology 513,632,811 513,632,811
Materials 185,610,369 185,610,369
Real Estate 351,999,731 351,999,731
Utilities 147,390,392 147,390,392
Total Common Stocks 3,245,839,222 3,245,839,222
Money Market Funds 20,517,021 20,517,021
Total Investments in Securities 3,266,356,243 3,266,356,243
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Mid Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Derivatives        
Liability        
Futures Contracts (3,502,244) (3,502,244)
Total 3,262,853,999 3,262,853,999
See the Portfolio of Investments for all investment classifications not indicated in the table.
Derivative instruments are valued at unrealized appreciation (depreciation).
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
17

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $2,440,660,139) $3,245,839,222
Affiliated issuers (cost $20,516,327) 20,517,021
Margin deposits on:  
Futures contracts 1,587,900
Receivable for:  
Investments sold 1,517,353
Capital shares sold 8,204,946
Dividends 3,855,098
Expense reimbursement due from Investment Manager 9,661
Prepaid expenses 6,612
Total assets 3,281,537,813
Liabilities  
Payable for:  
Capital shares purchased 12,732,417
Variation margin for futures contracts 935,759
Management services fees 18,309
Distribution and/or service fees 6,883
Transfer agent fees 416,542
Compensation of board members 236,935
Other expenses 116,489
Total liabilities 14,463,334
Net assets applicable to outstanding capital stock $3,267,074,479
Represented by  
Paid in capital 2,344,012,668
Total distributable earnings (loss) 923,061,811
Total - representing net assets applicable to outstanding capital stock $3,267,074,479
Class A  
Net assets $986,054,574
Shares outstanding 70,060,301
Net asset value per share $14.07
Institutional Class  
Net assets $1,579,863,108
Shares outstanding 112,835,349
Net asset value per share $14.00
Institutional 2 Class  
Net assets $663,450,703
Shares outstanding 46,315,319
Net asset value per share $14.32
Institutional 3 Class  
Net assets $37,706,094
Shares outstanding 2,745,976
Net asset value per share $13.73
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Mid Cap Index Fund  | Annual Report 2020

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $62,624,523
Dividends — affiliated issuers 832,287
Foreign taxes withheld (29,029)
Total income 63,427,781
Expenses:  
Management services fees 7,922,667
Distribution and/or service fees  
Class A 3,134,929
Transfer agent fees  
Class A 1,459,899
Institutional Class 2,205,812
Institutional 2 Class 476,891
Institutional 3 Class 4,186
Compensation of board members 90,086
Custodian fees 44,824
Printing and postage fees 132,856
Registration fees 103,161
Licensing fees and expenses 37,202
Audit fees 32,738
Legal fees 44,221
Interest on interfund lending 3,535
Compensation of chief compliance officer 757
Other 64,923
Total expenses 15,758,687
Fees waived or expenses reimbursed by Investment Manager and its affiliates (4,723,607)
Expense reduction (90)
Total net expenses 11,034,990
Net investment income 52,392,791
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 261,816,650
Investments — affiliated issuers 8,783
Futures contracts 2,753,101
Net realized gain 264,578,534
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (402,641,260)
Investments — affiliated issuers 694
Futures contracts (7,725,697)
Net change in unrealized appreciation (depreciation) (410,366,263)
Net realized and unrealized loss (145,787,729)
Net decrease in net assets resulting from operations $(93,394,938)
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
19

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $52,392,791 $57,223,936
Net realized gain 264,578,534 374,130,650
Net change in unrealized appreciation (depreciation) (410,366,263) (281,069,075)
Net increase (decrease) in net assets resulting from operations (93,394,938) 150,285,511
Distributions to shareholders    
Net investment income and net realized gains    
Class A (67,586,479) (112,473,667)
Institutional Class (107,030,985) (171,180,770)
Institutional 2 Class (42,569,287) (74,829,346)
Institutional 3 Class (1,743,771) (1,466,207)
Total distributions to shareholders (218,930,522) (359,949,990)
Decrease in net assets from capital stock activity (574,554,776) (310,371,005)
Total decrease in net assets (886,880,236) (520,035,484)
Net assets at beginning of year 4,153,954,715 4,673,990,199
Net assets at end of year $3,267,074,479 $4,153,954,715
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Mid Cap Index Fund  | Annual Report 2020

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 15,831,966 244,750,699 24,120,775 384,645,440
Distributions reinvested 3,570,527 55,075,275 6,162,434 91,963,935
Redemptions (36,684,751) (571,517,309) (37,890,405) (608,338,512)
Net decrease (17,282,258) (271,691,335) (7,607,196) (131,729,137)
Institutional Class        
Subscriptions 19,312,783 297,752,749 27,366,724 432,869,133
Distributions reinvested 4,880,426 74,874,392 7,916,559 117,549,063
Redemptions (39,946,568) (620,682,586) (44,471,861) (707,216,715)
Net decrease (15,753,359) (248,055,445) (9,188,578) (156,798,519)
Institutional 2 Class        
Subscriptions 15,811,518 250,291,819 18,580,954 306,142,993
Distributions reinvested 2,198,835 34,502,941 4,279,226 64,820,342
Redemptions (22,457,159) (356,427,513) (26,235,382) (410,732,294)
Net decrease (4,446,806) (71,632,753) (3,375,202) (39,768,959)
Institutional 3 Class        
Subscriptions 1,603,685 24,643,173 1,296,683 20,300,162
Distributions reinvested 107,820 1,623,506 95,922 1,387,369
Redemptions (624,153) (9,441,922) (242,668) (3,761,921)
Net increase 1,087,352 16,824,757 1,149,937 17,925,610
Total net decrease (36,395,071) (574,554,776) (19,021,039) (310,371,005)
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
21

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $15.47 0.18 (0.71) (0.53) (0.19) (0.68) (0.87)
Year Ended 2/28/2019 $16.25 0.18 0.36 0.54 (0.17) (1.15) (1.32)
Year Ended 2/28/2018 $16.05 0.17 1.26 1.43 (0.16) (1.07) (1.23)
Year Ended 2/28/2017 $13.23 0.16 3.87 4.03 (0.17) (1.04) (1.21)
Year Ended 2/29/2016 $16.14 0.16 (1.71) (1.55) (0.16) (1.20) (1.36)
Institutional Class
Year Ended 2/29/2020 $15.39 0.22 (0.70) (0.48) (0.23) (0.68) (0.91)
Year Ended 2/28/2019 $16.18 0.22 0.35 0.57 (0.21) (1.15) (1.36)
Year Ended 2/28/2018 $15.99 0.21 1.25 1.46 (0.20) (1.07) (1.27)
Year Ended 2/28/2017 $13.18 0.20 3.85 4.05 (0.20) (1.04) (1.24)
Year Ended 2/29/2016 $16.09 0.20 (1.71) (1.51) (0.20) (1.20) (1.40)
Institutional 2 Class
Year Ended 2/29/2020 $15.73 0.22 (0.72) (0.50) (0.23) (0.68) (0.91)
Year Ended 2/28/2019 $16.50 0.22 0.37 0.59 (0.21) (1.15) (1.36)
Year Ended 2/28/2018 $16.28 0.22 1.27 1.49 (0.20) (1.07) (1.27)
Year Ended 2/28/2017 $13.41 0.20 3.91 4.11 (0.20) (1.04) (1.24)
Year Ended 2/29/2016 $16.34 0.20 (1.73) (1.53) (0.20) (1.20) (1.40)
Institutional 3 Class
Year Ended 2/29/2020 $15.11 0.21 (0.68) (0.47) (0.23) (0.68) (0.91)
Year Ended 2/28/2019 $15.91 0.22 0.34 0.56 (0.21) (1.15) (1.36)
Year Ended 2/28/2018(e) $16.00 0.21 0.97 1.18 (0.20) (1.07) (1.27)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) Ratios include interfund lending expense which is less than 0.01%.
(d) The benefits derived from expense reductions had an impact of less than 0.01%.
(e) Institutional 3 Class shares commenced operations on March 1, 2017. Per share data and total return reflect activity from that date.
The accompanying Notes to Financial Statements are an integral part of this statement.
22 Columbia Mid Cap Index Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $14.07 (3.88%) 0.58%(c) 0.45%(c),(d) 1.16% 14% $986,055
Year Ended 2/28/2019 $15.47 3.66% 0.58% 0.45%(d) 1.08% 17% $1,351,153
Year Ended 2/28/2018 $16.25 8.99% 0.58% 0.45%(d) 1.05% 23% $1,543,057
Year Ended 2/28/2017 $16.05 31.10% 0.61% 0.45%(d) 1.07% 18% $1,602,086
Year Ended 2/29/2016 $13.23 (10.37%) 0.66% 0.45%(d) 1.05% 20% $1,044,589
Institutional Class
Year Ended 2/29/2020 $14.00 (3.59%) 0.33%(c) 0.20%(c),(d) 1.40% 14% $1,579,863
Year Ended 2/28/2019 $15.39 3.89% 0.33% 0.20%(d) 1.33% 17% $1,979,350
Year Ended 2/28/2018 $16.18 9.22% 0.33% 0.20%(d) 1.30% 23% $2,229,366
Year Ended 2/28/2017 $15.99 31.45% 0.37% 0.20%(d) 1.32% 18% $2,108,834
Year Ended 2/29/2016 $13.18 (10.18%) 0.41% 0.20%(d) 1.29% 20% $1,736,596
Institutional 2 Class
Year Ended 2/29/2020 $14.32 (3.65%) 0.28%(c) 0.20%(c) 1.40% 14% $663,451
Year Ended 2/28/2019 $15.73 3.94% 0.27% 0.20% 1.33% 17% $798,386
Year Ended 2/28/2018 $16.50 9.24% 0.28% 0.20% 1.30% 23% $893,473
Year Ended 2/28/2017 $16.28 31.35% 0.27% 0.20% 1.32% 18% $747,812
Year Ended 2/29/2016 $13.41 (10.14%) 0.26% 0.20% 1.29% 20% $506,524
Institutional 3 Class
Year Ended 2/29/2020 $13.73 (3.59%) 0.23%(c) 0.20%(c) 1.41% 14% $37,706
Year Ended 2/28/2019 $15.11 3.89% 0.23% 0.20% 1.38% 17% $25,066
Year Ended 2/28/2018(e) $15.91 7.47% 0.22% 0.20% 1.33% 23% $8,094
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Mid Cap Index Fund  | Annual Report 2020
23

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Mid Cap Index Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
24 Columbia Mid Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of transactions, at the mean of the latest quoted bid and ask prices.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
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25

Notes to Financial Statements  (continued)
February 29, 2020
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Futures contracts
Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to maintain appropriate equity market exposure while keeping sufficient cash to accommodate daily redemptions. These instruments may be used for other purposes in future periods. Upon entering into futures contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.
Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
26 Columbia Mid Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Equity risk Component of total distributable earnings (loss) — unrealized depreciation on futures contracts 3,502,244*
    
* Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin is reported in receivables or payables in the Statement of Assets and Liabilities.
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk 2,753,101
 
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk (7,725,697)
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average notional
amounts ($)*
Futures contracts — long 37,756,015
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
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27

Notes to Financial Statements  (continued)
February 29, 2020
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to 0.20% of the Fund’s daily net assets.
28 Columbia Mid Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.12
Institutional Class 0.12
Institutional 2 Class 0.06
Institutional 3 Class 0.01
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $90.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the
Columbia Mid Cap Index Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  Fee rate(s) contractual
through
June 30, 2020
Class A 0.45%
Institutional Class 0.20
Institutional 2 Class 0.20
Institutional 3 Class 0.20
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, and earnings and profits distributed to shareholders on the redemption of shares. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Undistributed net
investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
(890,277) (20,895,815) 21,786,092
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
30 Columbia Mid Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
51,928,314 167,002,208 218,930,522 65,783,290 294,166,700 359,949,990
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
5,240,513 123,000,726 795,053,394
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
2,467,800,605 1,133,259,113 (338,205,719) 795,053,394
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $529,932,082 and $1,232,436,608, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Columbia Mid Cap Index Fund  | Annual Report 2020
31

Notes to Financial Statements  (continued)
February 29, 2020
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Borrower 29,500,000 2.15 2
Interest expense incurred by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at February 29, 2020.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems,
32 Columbia Mid Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Passive investment risk
The Fund is not “actively” managed and may be affected by a general decline in market segments related to its underlying index. The Fund invests in securities or instruments included in, or believed by the Investment Manager to be representative of, its underlying index, regardless of their investment merits. The Fund does not seek temporary defensive positions when markets decline or appear overvalued. The decision of whether to remove a security from an index is made by an independent index provider who is not affiliated with the Fund or the Investment Manager.
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 22.9% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 11.1% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Small- and mid-cap company risk
Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies. Securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates
Columbia Mid Cap Index Fund  | Annual Report 2020
33

Notes to Financial Statements  (continued)
February 29, 2020
to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
34 Columbia Mid Cap Index Fund  | Annual Report 2020

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Mid Cap Index Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Mid Cap Index Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
Columbia Mid Cap Index Fund  | Annual Report 2020
35

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
93.65% 92.19% $246,237,840
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
36 Columbia Mid Cap Index Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
Columbia Mid Cap Index Fund  | Annual Report 2020
37

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
38 Columbia Mid Cap Index Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
Columbia Mid Cap Index Fund  | Annual Report 2020
39

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
40 Columbia Mid Cap Index Fund  | Annual Report 2020

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Columbia Mid Cap Index Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN196_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Select Mid Cap Value Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Select Mid Cap Value Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Select Mid Cap Value Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks long-term capital appreciation.
Portfolio management
Kari Montanus
Lead Portfolio Manager
Managed Fund since 2018
Jonas Patrikson, CFA
Portfolio Manager
Managed Fund since 2014
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 11/20/01 -2.47 3.53 9.45
  Including sales charges   -8.07 2.31 8.81
Advisor Class* 11/08/12 -2.14 3.80 9.66
Class C Excluding sales charges 11/20/01 -3.11 2.76 8.63
  Including sales charges   -4.06 2.76 8.63
Institutional Class 11/20/01 -2.22 3.80 9.72
Institutional 2 Class* 11/08/12 -2.12 3.92 9.76
Institutional 3 Class 07/15/09 -2.07 3.97 9.89
Class R 01/23/06 -2.72 3.28 9.17
Russell Midcap Value Index   -1.36 4.44 10.79
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. Since the Fund launched more than one share class at its inception, Class A shares were used. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The Russell Midcap Value Index, an unmanaged index, measures the performance of those Russell Midcap Index companies with lower price-to-book ratios and forecasted growth values.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Select Mid Cap Value Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 98.5
Money Market Funds 1.5
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Consumer Discretionary 8.0
Consumer Staples 6.8
Energy 5.2
Financials 17.3
Health Care 8.7
Industrials 12.3
Information Technology 9.2
Materials 6.5
Real Estate 11.3
Utilities 14.7
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned -2.47% excluding sales charges. The Fund lagged the -1.36% return of its benchmark, the Russell Midcap Value Index. In a difficult period for mid-cap stocks, security selection within the financials and consumer discretionary sectors detracted from relative results.
Global uncertainty curbed stock market gains, boosted bonds
Optimism prevailed early in 2019, buoyed by solid economic growth and a recovery from meaningful stock market losses in 2018. Strong job gains drove the unemployment rate down to 3.5%, annualized. Consumer spending and export trade supported U.S. economic growth. However, the pace of growth slowed to an estimated 2.1% for the year. In Europe, economic growth slowed as trade tensions and uncertainty mounted regarding Brexit (the U.K.’s departure from the European Union), which was finally resolved late in the year. At the same time, emerging markets came under pressure, driven by trade and tariff concerns. China’s economic conditions weakened and the spread of the coronavirus introduced enough global uncertainty to drive stock markets around the world down sharply in the final week of the period, raising concerns about the impact on global economic growth going forward.
Shares of large companies and growth-oriented companies weathered the year-end volatility better than small- and mid-cap value stocks. The S&P 500 Index returned 8.19% for the 12-month period, giving up substantial gains during the last few trading days of February. The Bloomberg Barclays U.S. Aggregate Bond Index gained 11.68%, as the yield on the 10-year U.S. Treasury fell to 1.10%. (Bond yields and prices move in opposite directions.)
Contributors and detractors
Solid stock selection within the industrials, energy, health care and materials sectors aided relative results as did a modest overweight in utilities, the best performing sector in the benchmark, valued by investors for its defensive qualities.
Top contributors to relative performance included Teradyne, Inc., FMC Corp. and Ingersoll-Rand PLC. Shares in semiconductor company Teradyne climbed higher due to the company’s solid earnings reports and an expected increase in demand for equipment for “5G” infrastructure. (5G is the fifth generation of wireless technology for digital cellular networks, which began wide deployment in 2019.) Agricultural chemical maker FMC reported strong earnings and execution, with especially noteworthy results in Latin America. Shares in diversified industrials manufacturer Ingersoll-Rand climbed early in the period due to strong quarterly earnings and increased forward earnings guidance. The company’s announcement that it would merge its industrials business with Gardner Denver Holdings Inc. was well received by investors. The Fund continued to own Teradyne and FMC at period end, but had sold Ingersoll-Rand, taking profits.
Stock selection within the financials and consumer discretionary sectors, an underweight in real estate and a modest overweight in energy detracted from relative results. Sector weights are primarily a function of our bottom up stock selection process. DXC Technology Co., Lincoln National Corp. and Royal Caribbean Cruises Ltd. were notable detractors from relative returns for the period. Shares in the IT services and consulting company DXC dropped after the company reported mostly in-line quarterly results but lowered forward earnings guidance because of delays in certain deals, foreign exchange headwinds and higher-than-expected pressures on its core outsourcing business. Shares of insurance company Lincoln National declined as low interest rates weighed on investor sentiment even though the company’s earnings remained in line with expectations. Cruise line operator Royal Caribbean sold off sharply with the outbreak of the coronavirus, as fears of a pandemic ravaged the cruise line industry. Despite these disappointments, we continued to own all three stocks.
At period’s end
At the end of the period, the Fund was overweight in the utilities, consumer staples and information technology sectors and meaningfully underweight in communication services and real estate. These weights, relative to the benchmark, were byproducts of our bottom-up stock selection process. Most important, we continue to look for companies that are trading at attractive valuations and that have identifiable catalysts with the potential to accelerate earnings and change investor perception. In doing so, we believe we have the potential to generate attractive returns for our shareholders.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Foreign investments subject the Fund to risks, including political, economic, market, social and others within a particular country, as well as to currency instabilities and less stringent financial and accounting standards generally applicable to U.S. issuers. Investments in mid-cap companies involve risks and volatility greater than investments in larger, more
Columbia Select Mid Cap Value Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
established companies. Value securities may be unprofitable if the market fails to recognize their intrinsic worth or the portfolio manager misgauged that worth. The Fund may invest significantly in issuers within a particular sector, which may be negatively affected by market, economic or other conditions, making the fund more vulnerable to unfavorable developments in the sector. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 953.10 1,019.10 5.63 5.82 1.16
Advisor Class 1,000.00 1,000.00 955.10 1,020.34 4.42 4.57 0.91
Class C 1,000.00 1,000.00 950.20 1,015.37 9.26 9.57 1.91
Institutional Class 1,000.00 1,000.00 954.50 1,020.34 4.42 4.57 0.91
Institutional 2 Class 1,000.00 1,000.00 954.80 1,020.89 3.89 4.02 0.80
Institutional 3 Class 1,000.00 1,000.00 955.10 1,021.08 3.69 3.82 0.76
Class R 1,000.00 1,000.00 952.60 1,017.85 6.85 7.07 1.41
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 98.6%
Issuer Shares Value ($)
Consumer Discretionary 7.9%
Hotels, Restaurants & Leisure 2.0%
Royal Caribbean Cruises Ltd. 329,870 26,524,847
Internet & Direct Marketing Retail 1.2%
Expedia Group, Inc. 166,031 16,373,977
Multiline Retail 2.7%
Dollar Tree, Inc.(a) 439,325 36,477,155
Textiles, Apparel & Luxury Goods 2.0%
Ralph Lauren Corp. 253,316 26,727,371
Total Consumer Discretionary 106,103,350
Consumer Staples 6.7%
Food & Staples Retailing 4.3%
Kroger Co. (The) 1,217,285 34,242,227
U.S. Foods Holding Corp.(a) 706,815 23,777,256
Total   58,019,483
Food Products 2.4%
Tyson Foods, Inc., Class A 476,525 32,322,691
Total Consumer Staples 90,342,174
Energy 5.2%
Energy Equipment & Services 1.1%
TechnipFMC PLC 946,005 14,038,714
Oil, Gas & Consumable Fuels 4.1%
Marathon Petroleum Corp. 416,075 19,730,277
Noble Energy, Inc. 1,124,265 17,797,115
WPX Energy, Inc.(a) 1,886,285 17,599,039
Total   55,126,431
Total Energy 69,165,145
Financials 17.0%
Banks 6.1%
Popular, Inc. 619,310 29,714,494
Regions Financial Corp. 2,349,515 31,765,442
SVB Financial Group(a) 100,375 20,894,060
Total   82,373,996
Capital Markets 2.1%
Northern Trust Corp. 320,300 28,109,528
Common Stocks (continued)
Issuer Shares Value ($)
Diversified Financial Services 2.6%
Voya Financial, Inc. 668,625 35,196,420
Insurance 6.2%
Hanover Insurance Group, Inc. (The) 235,000 27,856,900
Lincoln National Corp. 636,715 28,900,494
Reinsurance Group of America, Inc. 215,000 26,236,450
Total   82,993,844
Total Financials 228,673,788
Health Care 8.6%
Health Care Equipment & Supplies 2.8%
Zimmer Biomet Holdings, Inc. 276,665 37,667,940
Health Care Providers & Services 3.7%
Centene Corp.(a) 403,845 21,411,862
Quest Diagnostics, Inc. 262,160 27,804,689
Total   49,216,551
Life Sciences Tools & Services 2.1%
Agilent Technologies, Inc. 374,885 28,892,387
Total Health Care 115,776,878
Industrials 12.1%
Aerospace & Defense 3.0%
L3 Harris Technologies, Inc. 200,778 39,699,834
Electrical Equipment 2.7%
AMETEK, Inc. 420,655 36,176,330
Machinery 2.9%
Trane Technologies PLC 302,208 38,996,921
Road & Rail 2.5%
Norfolk Southern Corp. 187,795 34,244,418
Trading Companies & Distributors 1.0%
United Rentals, Inc.(a) 105,000 13,910,400
Total Industrials 163,027,903
Information Technology 9.1%
Communications Equipment 2.4%
Motorola Solutions, Inc. 192,335 31,866,063
Electronic Equipment, Instruments & Components 1.7%
Corning, Inc. 952,000 22,714,720
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
IT Services 0.6%
DXC Technology Co. 343,165 8,273,708
Semiconductors & Semiconductor Equipment 4.4%
Marvell Technology Group Ltd. 992,100 21,131,730
ON Semiconductor Corp.(a) 960,000 17,913,600
Teradyne, Inc. 346,675 20,370,623
Total   59,415,953
Total Information Technology 122,270,444
Materials 6.4%
Chemicals 4.6%
Eastman Chemical Co. 339,975 20,911,862
FMC Corp. 443,230 41,264,713
Total   62,176,575
Metals & Mining 1.8%
Freeport-McMoRan, Inc. 2,391,295 23,817,298
Total Materials 85,993,873
Real Estate 11.1%
Equity Real Estate Investment Trusts (REITS) 11.1%
First Industrial Realty Trust, Inc. 950,000 36,575,000
Gaming and Leisure Properties, Inc. 953,775 42,605,129
SL Green Realty Corp. 397,875 31,209,315
Welltower, Inc. 520,190 38,920,616
Total   149,310,060
Total Real Estate 149,310,060
Common Stocks (continued)
Issuer Shares Value ($)
Utilities 14.5%
Electric Utilities 5.3%
Edison International 521,315 35,027,155
Pinnacle West Capital Corp. 412,600 36,923,574
Total   71,950,729
Independent Power and Renewable Electricity Producers 2.8%
AES Corp. (The) 2,260,350 37,815,656
Multi-Utilities 6.4%
Ameren Corp. 512,550 40,491,450
CMS Energy Corp. 745,275 45,029,515
Total   85,520,965
Total Utilities 195,287,350
Total Common Stocks
(Cost $1,260,860,185)
1,325,950,965
Money Market Funds 1.5%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(b),(c) 20,794,404 20,794,404
Total Money Market Funds
(Cost $20,793,806)
20,794,404
Total Investments in Securities
(Cost: $1,281,653,991)
1,346,745,369
Other Assets & Liabilities, Net   (1,496,648)
Net Assets 1,345,248,721
 
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) The rate shown is the seven-day current annualized yield at February 29, 2020.
(c) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  28,820,048 197,234,536 (205,260,180) 20,794,404 2,151 598 390,117 20,794,404
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Consumer Discretionary 106,103,350 106,103,350
Consumer Staples 90,342,174 90,342,174
Energy 69,165,145 69,165,145
Financials 228,673,788 228,673,788
Health Care 115,776,878 115,776,878
Industrials 163,027,903 163,027,903
Information Technology 122,270,444 122,270,444
Materials 85,993,873 85,993,873
Real Estate 149,310,060 149,310,060
Utilities 195,287,350 195,287,350
Total Common Stocks 1,325,950,965 1,325,950,965
Money Market Funds 20,794,404 20,794,404
Total Investments in Securities 1,346,745,369 1,346,745,369
See the Portfolio of Investments for all investment classifications not indicated in the table.
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $1,260,860,185) $1,325,950,965
Affiliated issuers (cost $20,793,806) 20,794,404
Receivable for:  
Capital shares sold 737,954
Dividends 1,515,046
Expense reimbursement due from Investment Manager 1,062
Prepaid expenses 3,199
Total assets 1,349,002,630
Liabilities  
Payable for:  
Capital shares purchased 3,173,293
Management services fees 29,041
Distribution and/or service fees 4,031
Transfer agent fees 254,230
Compensation of board members 220,307
Compensation of chief compliance officer 12
Other expenses 72,995
Total liabilities 3,753,909
Net assets applicable to outstanding capital stock $1,345,248,721
Represented by  
Paid in capital 1,243,054,490
Total distributable earnings (loss) 102,194,231
Total - representing net assets applicable to outstanding capital stock $1,345,248,721
Class A  
Net assets $479,921,168
Shares outstanding 49,155,941
Net asset value per share $9.76
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $10.36
Advisor Class  
Net assets $20,432,596
Shares outstanding 2,009,312
Net asset value per share $10.17
Class C  
Net assets $12,726,178
Shares outstanding 1,453,044
Net asset value per share $8.76
Institutional Class  
Net assets $605,614,236
Shares outstanding 61,795,459
Net asset value per share $9.80
Institutional 2 Class  
Net assets $62,808,064
Shares outstanding 6,174,154
Net asset value per share $10.17
Institutional 3 Class  
Net assets $140,100,297
Shares outstanding 14,352,356
Net asset value per share $9.76
Class R  
Net assets $23,646,182
Shares outstanding 2,435,323
Net asset value per share $9.71
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
11

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $31,725,701
Dividends — affiliated issuers 390,117
Foreign taxes withheld (71,349)
Total income 32,044,469
Expenses:  
Management services fees 11,879,635
Distribution and/or service fees  
Class A 1,405,090
Class C 171,253
Class R 148,093
Transfer agent fees  
Class A 931,957
Advisor Class 39,605
Class C 28,501
Institutional Class 1,148,737
Institutional 2 Class 41,401
Institutional 3 Class 12,719
Class R 49,143
Compensation of board members 58,215
Custodian fees 11,143
Printing and postage fees 111,879
Registration fees 95,950
Audit fees 25,950
Legal fees 21,760
Compensation of chief compliance officer 333
Other 30,783
Total expenses 16,212,147
Fees waived or expenses reimbursed by Investment Manager and its affiliates (696,721)
Fees waived by transfer agent  
Institutional 2 Class (3,088)
Expense reduction (4,007)
Total net expenses 15,508,331
Net investment income 16,536,138
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 85,768,008
Investments — affiliated issuers 2,151
Net realized gain 85,770,159
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (123,239,208)
Investments — affiliated issuers 598
Net change in unrealized appreciation (depreciation) (123,238,610)
Net realized and unrealized loss (37,468,451)
Net decrease in net assets resulting from operations $(20,932,313)
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $16,536,138 $12,979,444
Net realized gain 85,770,159 293,473,612
Net change in unrealized appreciation (depreciation) (123,238,610) (249,287,067)
Net increase (decrease) in net assets resulting from operations (20,932,313) 57,165,989
Distributions to shareholders    
Net investment income and net realized gains    
Class A (18,193,680) (154,997,509)
Advisor Class (835,092) (9,252,914)
Class C (449,205) (8,753,910)
Institutional Class (24,467,859) (186,659,217)
Institutional 2 Class (2,396,789) (13,122,849)
Institutional 3 Class (5,612,786) (48,940,519)
Class R (881,879) (8,636,973)
Class T (41,228)
Total distributions to shareholders (52,837,290) (430,405,119)
Decrease in net assets from capital stock activity (149,323,097) (90,838,369)
Total decrease in net assets (223,092,700) (464,077,499)
Net assets at beginning of year 1,568,341,421 2,032,418,920
Net assets at end of year $1,345,248,721 $1,568,341,421
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
13

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 3,720,206 39,978,178 6,845,468 82,321,052
Distributions reinvested 1,549,857 16,747,145 14,110,115 143,170,441
Redemptions (11,806,729) (126,986,064) (17,454,758) (205,393,415)
Net increase (decrease) (6,536,666) (70,260,741) 3,500,825 20,098,078
Advisor Class        
Subscriptions 768,934 8,564,800 1,063,773 13,560,981
Distributions reinvested 70,554 793,026 820,904 9,120,135
Redemptions (862,542) (9,750,853) (4,944,600) (61,448,614)
Net decrease (23,054) (393,027) (3,059,923) (38,767,498)
Class C        
Subscriptions 99,155 956,282 196,327 2,057,701
Distributions reinvested 42,422 413,178 839,232 8,239,279
Redemptions (920,275) (8,838,996) (4,470,813) (52,052,375)
Net decrease (778,698) (7,469,536) (3,435,254) (41,755,395)
Institutional Class        
Subscriptions 6,609,536 71,587,344 5,320,887 63,037,043
Distributions reinvested 2,108,240 22,834,881 16,850,564 172,232,428
Redemptions (13,887,409) (150,522,554) (18,143,253) (216,878,671)
Net increase (decrease) (5,169,633) (56,100,329) 4,028,198 18,390,800
Institutional 2 Class        
Subscriptions 1,675,027 18,814,543 3,890,214 41,231,272
Distributions reinvested 213,491 2,396,789 1,216,107 13,115,217
Redemptions (2,256,270) (25,034,276) (4,573,681) (58,493,418)
Net increase (decrease) (367,752) (3,822,944) 532,640 (4,146,929)
Institutional 3 Class        
Subscriptions 3,349,292 36,095,945 3,232,831 39,389,706
Distributions reinvested 391,920 4,224,192 2,758,688 28,294,838
Redemptions (4,230,934) (45,292,288) (9,172,108) (109,531,841)
Net decrease (489,722) (4,972,151) (3,180,589) (41,847,297)
Class K        
Redemptions (456) (6,275)
Net decrease (456) (6,275)
Class R        
Subscriptions 504,029 5,369,854 555,228 6,591,157
Distributions reinvested 79,460 854,855 807,129 8,188,648
Redemptions (1,171,497) (12,529,078) (1,462,863) (17,412,415)
Net decrease (588,008) (6,304,369) (100,506) (2,632,610)
Class T        
Distributions reinvested 4,003 40,739
Redemptions (20,899) (211,982)
Net decrease (16,896) (171,243)
Total net decrease (13,953,533) (149,323,097) (1,731,961) (90,838,369)
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Select Mid Cap Value Fund  | Annual Report 2020

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Columbia Select Mid Cap Value Fund  | Annual Report 2020
15

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $10.34 0.10 (0.32) (0.22) (0.10) (0.26) (0.36)
Year Ended 2/28/2019 $13.27 0.07 0.18 0.25 (0.07) (3.11) (3.18)
Year Ended 2/28/2018 $15.19 0.13 0.80 0.93 (0.14) (2.71) (2.85)
Year Ended 2/28/2017 $12.88 0.11 3.35 3.46 (0.11) (1.04) (1.15)
Year Ended 2/29/2016 $17.18 0.06 (2.03) (1.97) (0.05) (2.28) (2.33)
Advisor Class
Year Ended 2/29/2020 $10.75 0.13 (0.33) (0.20) (0.12) (0.26) (0.38)
Year Ended 2/28/2019 $13.67 0.10 0.19 0.29 (0.10) (3.11) (3.21)
Year Ended 2/28/2018 $15.57 0.17 0.82 0.99 (0.18) (2.71) (2.89)
Year Ended 2/28/2017 $13.18 0.15 3.42 3.57 (0.14) (1.04) (1.18)
Year Ended 2/29/2016 $17.52 0.10 (2.07) (1.97) (0.09) (2.28) (2.37)
Class C
Year Ended 2/29/2020 $9.30 0.02 (0.28) (0.26) (0.02) (0.26) (0.28)
Year Ended 2/28/2019 $12.29 (0.02) 0.14 0.12 (3.11) (3.11)
Year Ended 2/28/2018 $14.29 0.01 0.75 0.76 (0.05) (2.71) (2.76)
Year Ended 2/28/2017 $12.20 0.00(d) 3.17 3.17 (0.04) (1.04) (1.08)
Year Ended 2/29/2016 $16.47 (0.06) (1.93) (1.99) (2.28) (2.28)
Institutional Class
Year Ended 2/29/2020 $10.38 0.13 (0.33) (0.20) (0.12) (0.26) (0.38)
Year Ended 2/28/2019 $13.31 0.10 0.18 0.28 (0.10) (3.11) (3.21)
Year Ended 2/28/2018 $15.23 0.18 0.79 0.97 (0.18) (2.71) (2.89)
Year Ended 2/28/2017 $12.91 0.15 3.35 3.50 (0.14) (1.04) (1.18)
Year Ended 2/29/2016 $17.21 0.10 (2.03) (1.93) (0.09) (2.28) (2.37)
Institutional 2 Class
Year Ended 2/29/2020 $10.76 0.14 (0.33) (0.19) (0.14) (0.26) (0.40)
Year Ended 2/28/2019 $13.67 0.11 0.20 0.31 (0.11) (3.11) (3.22)
Year Ended 2/28/2018 $15.57 0.18 0.83 1.01 (0.20) (2.71) (2.91)
Year Ended 2/28/2017 $13.18 0.17 3.42 3.59 (0.16) (1.04) (1.20)
Year Ended 2/29/2016 $17.52 0.12 (2.07) (1.95) (0.11) (2.28) (2.39)
Institutional 3 Class
Year Ended 2/29/2020 $10.34 0.14 (0.32) (0.18) (0.14) (0.26) (0.40)
Year Ended 2/28/2019 $13.27 0.12 0.18 0.30 (0.12) (3.11) (3.23)
Year Ended 2/28/2018 $15.20 0.14 0.84 0.98 (0.20) (2.71) (2.91)
Year Ended 2/28/2017 $12.89 0.17 3.35 3.52 (0.17) (1.04) (1.21)
Year Ended 2/29/2016 $17.19 0.13 (2.03) (1.90) (0.12) (2.28) (2.40)
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $9.76 (2.47%) 1.21% 1.16%(c) 0.91% 28% $479,921
Year Ended 2/28/2019 $10.34 3.57% 1.20% 1.17%(c) 0.57% 79% $575,861
Year Ended 2/28/2018 $13.27 5.96% 1.18% 1.18%(c) 0.86% 59% $692,641
Year Ended 2/28/2017 $15.19 27.41% 1.17% 1.17%(c) 0.78% 33% $886,910
Year Ended 2/29/2016 $12.88 (12.77%) 1.18% 1.18%(c) 0.37% 47% $837,676
Advisor Class
Year Ended 2/29/2020 $10.17 (2.14%) 0.96% 0.91%(c) 1.16% 28% $20,433
Year Ended 2/28/2019 $10.75 3.79% 0.95% 0.92%(c) 0.78% 79% $21,857
Year Ended 2/28/2018 $13.67 6.20% 0.93% 0.92%(c) 1.10% 59% $69,624
Year Ended 2/28/2017 $15.57 27.70% 0.93% 0.93%(c) 1.02% 33% $105,459
Year Ended 2/29/2016 $13.18 (12.53%) 0.94% 0.94%(c) 0.64% 47% $63,910
Class C
Year Ended 2/29/2020 $8.76 (3.11%) 1.96% 1.92%(c) 0.17% 28% $12,726
Year Ended 2/28/2019 $9.30 2.78% 1.95% 1.92%(c) (0.20%) 79% $20,763
Year Ended 2/28/2018 $12.29 5.09% 1.93% 1.92%(c) 0.10% 59% $69,670
Year Ended 2/28/2017 $14.29 26.48% 1.92% 1.92%(c) 0.03% 33% $99,413
Year Ended 2/29/2016 $12.20 (13.42%) 1.93% 1.93%(c) (0.38%) 47% $99,372
Institutional Class
Year Ended 2/29/2020 $9.80 (2.22%) 0.96% 0.91%(c) 1.16% 28% $605,614
Year Ended 2/28/2019 $10.38 3.84% 0.95% 0.92%(c) 0.82% 79% $694,941
Year Ended 2/28/2018 $13.31 6.21% 0.93% 0.93%(c) 1.20% 59% $837,610
Year Ended 2/28/2017 $15.23 27.74% 0.93% 0.93%(c) 1.02% 33% $1,421,365
Year Ended 2/29/2016 $12.91 (12.51%) 0.93% 0.93%(c) 0.61% 47% $1,450,834
Institutional 2 Class
Year Ended 2/29/2020 $10.17 (2.12%) 0.85% 0.80% 1.27% 28% $62,808
Year Ended 2/28/2019 $10.76 3.99% 0.83% 0.80% 0.89% 79% $70,379
Year Ended 2/28/2018 $13.67 6.33% 0.82% 0.82% 1.17% 59% $82,174
Year Ended 2/28/2017 $15.57 27.86% 0.80% 0.80% 1.15% 33% $88,789
Year Ended 2/29/2016 $13.18 (12.40%) 0.79% 0.79% 0.76% 47% $58,924
Institutional 3 Class
Year Ended 2/29/2020 $9.76 (2.07%) 0.80% 0.75% 1.32% 28% $140,100
Year Ended 2/28/2019 $10.34 4.02% 0.78% 0.76% 0.97% 79% $153,442
Year Ended 2/28/2018 $13.27 6.34% 0.77% 0.77% 0.98% 59% $239,180
Year Ended 2/28/2017 $15.20 27.94% 0.75% 0.75% 1.19% 33% $78,828
Year Ended 2/29/2016 $12.89 (12.35%) 0.74% 0.74% 0.81% 47% $44,147
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
17

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class R
Year Ended 2/29/2020 $10.29 0.07 (0.32) (0.25) (0.07) (0.26) (0.33)
Year Ended 2/28/2019 $13.22 0.04 0.18 0.22 (0.04) (3.11) (3.15)
Year Ended 2/28/2018 $15.14 0.09 0.80 0.89 (0.10) (2.71) (2.81)
Year Ended 2/28/2017 $12.84 0.08 3.33 3.41 (0.07) (1.04) (1.11)
Year Ended 2/29/2016 $17.14 0.02 (2.03) (2.01) (0.01) (2.28) (2.29)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) The benefits derived from expense reductions had an impact of less than 0.01%.
(d) Rounds to zero.
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class R
Year Ended 2/29/2020 $9.71 (2.72%) 1.46% 1.41%(c) 0.66% 28% $23,646
Year Ended 2/28/2019 $10.29 3.34% 1.45% 1.42%(c) 0.32% 79% $31,097
Year Ended 2/28/2018 $13.22 5.71% 1.43% 1.42%(c) 0.61% 59% $41,290
Year Ended 2/28/2017 $15.14 27.10% 1.42% 1.42%(c) 0.54% 33% $53,457
Year Ended 2/29/2016 $12.84 (13.02%) 1.43% 1.43%(c) 0.11% 47% $52,550
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
19

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Select Mid Cap Value Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
20 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
21

Notes to Financial Statements  (continued)
February 29, 2020
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid each calendar quarter. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.82% to 0.65% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.77% of the Fund’s average daily net assets.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transactions with affiliates
For the year ended February 29, 2020, the Fund engaged in purchase and/or sale transactions with affiliates and/or accounts that have a common investment manager (or affiliated investment managers), common directors/trustees, and/or common officers. Those purchase and sale transactions complied with provisions of Rule 17a-7 under the 1940 Act and were $7,286,207 and $0, respectively.
22 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class. In addition, effective July 1, 2019 through June 30, 2020, Institutional 2 Class shares are subject to a contractual transfer agency fee annual limitation of not more than 0.05% of the average daily net assets attributable to Institutional 2 Class shares.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.17
Advisor Class 0.17
Class C 0.17
Institutional Class 0.17
Institutional 2 Class 0.05
Institutional 3 Class 0.01
Class R 0.17
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $4,007.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 102,985
Class C 1.00(b) 710
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 1.17% 1.17%
Advisor Class 0.92 0.92
Class C 1.92 1.92
Institutional Class 0.92 0.92
Institutional 2 Class 0.80 0.79
Institutional 3 Class 0.76 0.75
Class R 1.42 1.42
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. In addition to the contractual agreement, the Investment Manager and certain of its affiliates have voluntarily agreed to waive fees and/or reimburse Fund expenses (excluding certain fees and expenses described above) so that Fund level expenses (expenses directly attributable to the Fund and not to a specific share class) are waived proportionately across all share classes, but the Fund’s net operating expenses shall not exceed the contractual annual rates listed in the table above. This arrangement may be revised or discontinued at any time. Reflected in the contractual cap commitment, effective July 1, 2019 through June 30, 2020, is the Transfer Agent’s contractual agreement to limit total transfer agency fees to an annual rate of not more than 0.05% for Institutional 2 Class of the average daily net assets attributable to Institutional 2 Class, unless sooner terminated at the sole discretion of the Board of Trustees. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
24 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses and trustees’ deferred compensation. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The Fund did not have any permanent differences; therefore, no reclassifications were made.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
16,762,090 36,075,200 52,837,290 51,537,238 378,867,881 430,405,119
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
1,921,839 38,432,001 62,058,629
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
1,284,686,740 183,674,101 (121,615,472) 62,058,629
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $425,055,328 and $600,392,044, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund did not borrow or lend money under the Interfund Program during the year ended February 29, 2020.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks
26 Columbia Select Mid Cap Value Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Small- and mid-cap company risk
Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies. Securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
27

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Select Mid Cap Value Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Select Mid Cap Value Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the five years in the period ended February 29, 2020 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the five years in the period ended February 29, 2020 in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian and transfer agent. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
28 Columbia Select Mid Cap Value Fund  | Annual Report 2020

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
94.81% 94.26% $75,218,564
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Columbia Select Mid Cap Value Fund  | Annual Report 2020
29

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
30 Columbia Select Mid Cap Value Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Select Mid Cap Value Fund  | Annual Report 2020
31

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
32 Columbia Select Mid Cap Value Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Select Mid Cap Value Fund  | Annual Report 2020
33

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Columbia Select Mid Cap Value Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN197_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Small Cap Index Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Small Cap Index Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Small Cap Index Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks total return before fees and expenses that corresponds to the total return of the Standard & Poor’s (S&P) SmallCap 600® Index.
Portfolio management
Christopher Lo, CFA
Lead Portfolio Manager
Managed Fund since 2014
Vadim Shteyn
Portfolio Manager
Managed Fund since 2011
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A 10/15/96 -8.08 5.52 11.17
Institutional Class 10/15/96 -7.85 5.78 11.44
Institutional 2 Class* 11/08/12 -7.87 5.78 11.38
Institutional 3 Class* 03/01/17 -7.84 5.69 11.26
S&P SmallCap 600 Index   -7.68 6.01 11.67
All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. Since the Fund launched more than one share class at its inception, Class A shares were used. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The S&P SmallCap 600 Index tracks the performance of 600 domestic companies traded on major stock exchanges. The S&P SmallCap 600 Index is heavily weighted with the stocks of companies with small market capitalizations.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Small Cap Index Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Small Cap Index Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 99.6
Exchange-Traded Equity Funds 0.3
Money Market Funds 0.1
Rights 0.0(a)
Total 100.0
    
(a) Rounds to zero.
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 2.4
Consumer Discretionary 13.5
Consumer Staples 3.2
Energy 3.1
Financials 17.9
Health Care 12.3
Industrials 18.0
Information Technology 14.1
Materials 4.5
Real Estate 8.7
Utilities 2.3
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Small Cap Index Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned -8.08%. The Fund closely tracked its benchmark, the unmanaged S&P Small Cap 600 Index, which returned -7.68% for the same period. Mutual funds, unlike unmanaged indices, incur operating expenses.
U.S. equity markets posted divergent results amid extreme volatility
The 12 months ended February 29, 2020 proved to be volatile for U.S. equities. The annual period began with mixed results, as large-cap stocks wobbled modestly higher, while mid-cap and small-cap companies posted negative absolute returns on fears that economic growth was potentially slowing and the impact of U.S.-China trade headlines might be greater than the U.S. Administration was stating. Through the second quarter of 2019, large-cap stocks continued to better weather the “risk off” sentiment, or heightened risk aversion, that dominated these months, as did growth stocks across the capitalization spectrum. Speculation around the market’s hoped-for interest rate cuts from the U.S. Federal Reserve (Fed) contributed to frequent swings in investor optimism.
Day-to-day sentiment about the state of U.S.-China trade relations remained a major factor influencing the U.S. equity markets going into the second half of 2019. Also adding to the list of worries were U.S. recession fears based on weak manufacturing data, uncertainties about global economic growth, several geopolitical hotspots, domestic political turmoil around the impeachment of the U.S. President and the then-diverse and differentiated Democratic presidential candidate campaigns. Toward the end of 2019, however, investor optimism soared. Hopeful expectations surrounding a “Phase 1” trade deal between the U.S. and China, an accommodative Fed and the seemingly persistent resilience of the American consumer led the S&P 500 Index to its best fourth quarter since 2013. Mid-cap and small-cap stocks lagged their large-cap counterparts but also posted a strong fourth calendar quarter.
The optimism seen at the end of the 2019 calendar year continued into the start of the new decade but was derailed quickly by the outbreak of the highly contagious and novel coronavirus first identified in Wuhan, Hubei province in China. As the impact of the coronavirus became more pronounced and fears of a severe pandemic that could cause a global recession grew, markets around the world, including the U.S., sold off dramatically. The S&P 500 Index lost almost 11.5% in the last week of February 2020 alone, its biggest weekly decline since October 2008. Mid-cap and small-cap companies struggled similarly.
Still, even with the sharp decline in February 2020, the S&P 500 Index ended the annual period up 8.19%. However, amid heightened volatility and risk aversion, mid-cap and small-cap stocks significantly underperformed large-cap stocks, with the S&P Mid Cap 400 Index and the S&P Small Cap 600 Index posting returns of -3.39% and -7.68%, respectively, for the same annual period.
S&P Small Cap 600 Index returns hampered most by energy sector
Only three of the eleven sectors of the S&P Small Cap 600 Index posted a positive return during the 12 months ended February 29, 2020. In terms of total return, utilities, real estate and information technology were the best relative performers. On the basis of impact, which takes weightings and total returns into account, the same three sectors, led by information technology and then utilities and real estate, were the biggest contributors to the Index’s return. The top performing industries for the annual period on the basis of total return were automobiles; life sciences tools and services; Internet and direct marketing retail; diversified financial services; and multi-utilities.
Conversely, energy was by far the weakest sector from both a total return perspective and on the basis of impact. Materials and consumer staples also posted weak total returns. Financials and consumer discretionary were the next weakest sectors on the basis of impact. The worst performing industries for the annual period on the basis of total return were energy equipment and services; oil, gas and consumable fuels; multiline retail; food and staples retailing; and beverages.
Top individual contributors within the S&P Small Cap 600 Index during the annual period included pharmaceuticals company Medicines Co.; biotechnology company Arrowhead Pharmaceuticals, Inc.; renewable energy company SolarEdge Technologies, Inc.; biopharmaceutical company Momenta Pharmaceuticals, Inc.; and insulation installation services provider TopBuild Corp. Top detractors were robot manufacturer iRobot Corp.; oil and gas exploration and production company Whiting Petroleum Corp.; oil and gas producer and distributor PDC Energy, Inc.; machinery manufacturer Hillenbrand, Inc.; and medical equipment manufacturer Merit Medical Systems, Inc.
Columbia Small Cap Index Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
Industrials remained the largest sector by weighting in the S&P Small Cap 600 Index as of February 29, 2020, with a weighting of 18.03%. As always, each sector and stock in the S&P Small Cap 600 Index was represented in the Fund with approximately the same weighting as in the Index and therefore had a similar effect.
Index additions and deletions drove Fund portfolio changes
During the annual period, there were 90 additions and 90 deletions to the Index and the Fund’s portfolio. Among those stocks added to the Index and Fund were Big Lots, Inc., Diamond Offshore Drilling, Inc., Livent Corp., Whiting Petroleum, Pitney Bowes, Arrowhead Pharmaceuticals, Realogy Holdings Corp., Genomic Health, Inc. Inogen, Inc., QEP Resources, Inc., Signet Jewelers Ltd., Tupperware Brands Corp., Fresh Del Monte Produce, Inc., Oceaneering International, Inc., Granite Construction, Inc. and Tanger Factory Outlet Centers, Inc. Deletions included Gannett Co., Ambac Financial Group, Inc., Avon Products, Inc., Barnes & Noble Education, Inc., CARBO Ceramics, Inc., Finisar Corp., Kirkland’s, Inc., LSC Communications, Inc., Medicines Co., PS Business Parks, Inc., Repligen Corp., SolarEdge Technologies, Trex Co., Inc., Vitamin Shoppe, Inc., Wageworks, Inc. and Nutrisystem, Inc..
We do not anticipate any changes in the portfolio beyond the customary quarterly rebalancings and stock substitutions we make to align the Fund with the S&P Small Cap 600 Index.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Investments in small-cap companies involve risks and volatility greater than investments in larger, more established companies. The Fund’s net value will generally decline when the performance of its targeted index declines. Investing in derivatives is a specialized activity that involves special risks, which may result in significant losses. The Fund may invest significantly in issuers within a particular sector, which may be negatively affected by market, economic or other conditions, making the Fund more vulnerable to unfavorable developments in the sector. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Small Cap Index Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 968.50 1,022.63 2.20 2.26 0.45
Institutional Class 1,000.00 1,000.00 969.70 1,023.87 0.98 1.01 0.20
Institutional 2 Class 1,000.00 1,000.00 969.60 1,023.87 0.98 1.01 0.20
Institutional 3 Class 1,000.00 1,000.00 969.90 1,023.87 0.98 1.01 0.20
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Small Cap Index Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 99.8%
Issuer Shares Value ($)
Communication Services 2.4%
Diversified Telecommunication Services 1.4%
ATN International, Inc. 54,034 2,912,433
Cincinnati Bell, Inc.(a) 250,452 3,268,399
Cogent Communications Holdings, Inc. 207,040 15,115,990
Consolidated Communications Holdings, Inc. 358,010 2,226,822
Iridium Communications, Inc.(a) 481,870 13,044,221
Vonage Holdings Corp.(a) 1,132,880 10,150,605
Total   46,718,470
Entertainment 0.2%
Glu Mobile, Inc.(a) 572,080 4,073,209
Marcus Corp. (The) 114,183 3,050,970
Total   7,124,179
Interactive Media & Services 0.1%
QuinStreet, Inc.(a) 228,999 2,949,507
Media 0.4%
EW Scripps Co. (The), Class A 270,694 3,221,259
Gannett Co, Inc. 610,382 2,563,604
Scholastic Corp. 152,690 4,899,822
TechTarget, Inc.(a) 114,000 2,636,820
Total   13,321,505
Wireless Telecommunication Services 0.3%
Shenandoah Telecommunications Co. 232,790 10,342,860
Spok Holdings, Inc. 87,099 867,506
Total   11,210,366
Total Communication Services 81,324,027
Consumer Discretionary 13.5%
Auto Components 1.8%
American Axle & Manufacturing Holdings, Inc.(a) 558,700 3,536,571
Cooper Tire & Rubber Co. 249,280 6,354,147
Cooper-Standard Holding, Inc.(a) 83,640 1,445,299
Dorman Products, Inc.(a) 144,915 8,787,646
Fox Factory Holding Corp.(a) 191,360 12,132,224
Garrett Motion, Inc.(a) 371,680 2,579,459
Gentherm, Inc.(a) 162,640 6,632,459
LCI Industries 124,317 12,002,806
Common Stocks (continued)
Issuer Shares Value ($)
Motorcar Parts of America, Inc.(a) 94,170 1,576,406
Standard Motor Products, Inc. 100,389 4,417,116
Total   59,464,133
Automobiles 0.3%
Winnebago Industries, Inc. 167,320 8,682,235
Distributors 0.2%
Core-Mark Holding Co., Inc. 226,340 5,208,083
Diversified Consumer Services 0.7%
American Public Education, Inc.(a) 76,484 1,702,534
Perdoceo Education Corp.(a) 349,578 5,219,200
Regis Corp.(a) 120,070 1,532,093
Strategic Education, Inc. 109,106 16,080,042
Total   24,533,869
Hotels, Restaurants & Leisure 1.7%
BJ’s Restaurants, Inc. 95,192 3,136,576
Bloomin’ Brands, Inc. 431,480 7,762,325
Chuy’s Holdings, Inc.(a) 82,530 1,769,443
Dave & Buster’s Entertainment, Inc. 153,150 5,055,482
Dine Brands Global, Inc. 83,411 6,827,190
El Pollo Loco Holdings, Inc.(a) 97,030 1,251,687
Fiesta Restaurant Group, Inc.(a) 106,450 1,028,307
Monarch Casino & Resort, Inc.(a) 59,275 2,802,522
Red Robin Gourmet Burgers, Inc.(a) 64,274 1,767,535
Ruth’s Hospitality Group, Inc. 134,818 2,579,068
Shake Shack, Inc., Class A(a) 154,240 9,168,026
Wingstop, Inc. 146,300 12,355,035
Total   55,503,196
Household Durables 2.7%
Cavco Industries, Inc.(a) 42,650 8,603,358
Century Communities, Inc.(a) 141,260 4,708,196
Ethan Allen Interiors, Inc. 121,512 1,603,958
Installed Building Products, Inc.(a) 105,860 6,992,053
iRobot Corp.(a) 140,425 6,738,996
La-Z-Boy, Inc. 230,397 6,600,874
LGI Homes, Inc.(a) 99,180 7,473,213
M/I Homes, Inc.(a) 139,793 5,204,493
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Small Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
MDC Holdings, Inc. 248,759 9,786,179
Meritage Homes Corp.(a) 178,831 11,348,615
TopBuild Corp.(a) 168,630 17,031,630
Tupperware Brands Corp. 242,890 692,237
Universal Electronics, Inc.(a) 69,189 2,921,160
Total   89,704,962
Internet & Direct Marketing Retail 0.5%
Liquidity Services, Inc.(a) 133,720 524,182
PetMed Express, Inc. 100,218 2,645,755
Shutterstock, Inc.(a) 95,110 3,665,540
Stamps.com, Inc.(a) 80,570 11,369,233
Total   18,204,710
Leisure Products 0.4%
Callaway Golf Co. 467,455 7,937,386
Sturm Ruger & Co., Inc. 82,510 3,963,780
Vista Outdoor, Inc.(a) 287,240 2,111,214
Total   14,012,380
Multiline Retail 0.1%
Big Lots, Inc. 193,800 3,063,978
JCPenney Co., Inc.(a) 1,494,130 1,030,950
Total   4,094,928
Specialty Retail 3.5%
Abercrombie & Fitch Co., Class A 311,730 4,093,015
America’s Car-Mart, Inc.(a) 30,660 3,150,928
Asbury Automotive Group, Inc.(a) 96,110 8,519,190
Barnes & Noble Education, Inc.(a) 191,923 635,265
Boot Barn Holdings, Inc.(a) 141,880 4,351,460
Buckle, Inc. (The) 141,811 3,209,183
Caleres, Inc. 202,244 2,331,873
Cato Corp. (The), Class A 107,935 1,745,309
Chico’s FAS, Inc. 589,220 2,362,772
Children’s Place, Inc. (The) 77,341 4,454,842
Conn’s, Inc.(a) 94,760 772,294
Designer Brands, Inc. 274,070 3,702,686
Express, Inc.(a) 334,130 1,236,281
GameStop Corp., Class A 327,450 1,178,820
Genesco, Inc.(a) 70,782 2,435,609
Group 1 Automotive, Inc. 86,935 7,409,470
Common Stocks (continued)
Issuer Shares Value ($)
Guess?, Inc. 211,930 3,433,266
Haverty Furniture Companies, Inc. 89,866 1,511,546
Hibbett Sports, Inc.(a) 87,573 1,709,425
Lithia Motors, Inc., Class A 112,482 13,403,355
Lumber Liquidators Holdings, Inc.(a) 142,608 1,397,558
MarineMax, Inc.(a) 106,569 1,804,213
Michaels Companies, Inc. (The)(a) 379,140 1,626,511
Monro, Inc. 165,271 9,275,009
Office Depot, Inc. 2,714,530 6,379,146
Rent-A-Center, Inc. 244,780 5,211,366
Shoe Carnival, Inc. 44,420 1,328,602
Signet Jewelers Ltd. 260,020 6,063,666
Sleep Number Corp.(a) 141,201 6,219,904
Sonic Automotive, Inc., Class A 120,511 3,374,308
Tailored Brands, Inc. 251,560 822,601
Zumiez, Inc.(a) 101,258 2,686,375
Total   117,835,848
Textiles, Apparel & Luxury Goods 1.6%
Crocs, Inc.(a) 340,768 8,917,899
Fossil Group, Inc.(a) 230,850 1,059,602
G-III Apparel Group Ltd.(a) 213,800 4,780,568
Kontoor Brands, Inc. 231,950 7,825,993
Movado Group, Inc. 81,533 1,198,535
Oxford Industries, Inc. 84,616 5,109,960
Steven Madden Ltd. 384,313 12,567,035
Unifi, Inc.(a) 72,580 1,551,035
Vera Bradley, Inc.(a) 116,490 962,207
Wolverine World Wide, Inc. 401,732 10,561,534
Total   54,534,368
Total Consumer Discretionary 451,778,712
Consumer Staples 3.2%
Beverages 0.3%
Coca-Cola Bottling Co. Consolidated 23,060 4,528,523
MGP Ingredients, Inc. 65,970 1,897,297
National Beverage Corp.(a) 57,820 2,445,208
Total   8,871,028
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Food & Staples Retailing 0.5%
Andersons, Inc. (The) 161,929 2,974,636
PriceSmart, Inc. 110,730 6,166,554
SpartanNash Co. 180,549 2,244,224
The Chefs’ Warehouse(a) 126,560 3,875,267
United Natural Foods, Inc.(a) 264,850 1,713,579
Total   16,974,260
Food Products 1.1%
B&G Foods, Inc. 318,126 4,708,265
Calavo Growers, Inc. 81,282 5,888,881
Cal-Maine Foods, Inc. 150,436 5,248,712
Fresh Del Monte Produce, Inc. 150,470 4,125,887
J&J Snack Foods Corp. 74,167 11,927,537
John B. Sanfilippo & Son, Inc. 43,670 3,065,197
Seneca Foods Corp., Class A(a) 33,983 1,179,890
Total   36,144,369
Household Products 0.5%
Central Garden & Pet Co.(a) 48,720 1,304,722
Central Garden & Pet Co., Class A(a) 199,582 5,051,420
WD-40 Co. 68,069 11,741,222
Total   18,097,364
Personal Products 0.4%
Inter Parfums, Inc. 87,529 5,256,991
Medifast, Inc. 57,699 4,795,364
Usana Health Sciences, Inc.(a) 62,350 4,121,335
Total   14,173,690
Tobacco 0.4%
Universal Corp. 123,210 6,080,414
Vector Group Ltd. 572,610 6,653,728
Total   12,734,142
Total Consumer Staples 106,994,853
Energy 3.0%
Energy Equipment & Services 1.5%
Archrock, Inc. 633,840 4,468,572
Diamond Offshore Drilling, Inc.(a) 321,460 980,453
DMC Global Inc 72,750 2,623,365
Dril-Quip, Inc.(a) 179,720 6,401,627
Era Group, Inc.(a) 98,349 963,820
Common Stocks (continued)
Issuer Shares Value ($)
Exterran Corp.(a) 139,760 712,776
Geospace Technologies Corp.(a) 67,710 834,864
Helix Energy Solutions Group, Inc.(a) 702,220 4,711,896
KLX Energy Services Holdings, Inc.(a) 104,350 252,527
Matrix Service Co.(a) 134,916 1,629,785
Nabors Industries Ltd. 1,678,820 2,954,723
Newpark Resources, Inc.(a) 445,630 1,564,161
Noble Corp. PLC(a) 1,237,840 867,974
Oceaneering International, Inc.(a) 491,410 5,179,462
Oil States International, Inc.(a) 300,530 2,377,192
ProPetro Holding Corp.(a) 409,030 3,583,103
RPC, Inc. 255,710 879,642
SEACOR Holdings, Inc.(a) 87,204 3,252,709
Tetra Technologies, Inc.(a) 623,599 785,735
US Silica Holdings, Inc. 365,430 1,677,324
Valaris PLC 982,910 3,626,938
Total   50,328,648
Oil, Gas & Consumable Fuels 1.5%
Bonanza Creek Energy, Inc.(a) 92,250 1,502,753
Callon Petroleum Co.(a) 1,939,560 4,402,801
CONSOL Energy, Inc.(a) 128,660 732,075
Denbury Resources, Inc.(a) 2,447,420 1,841,439
Dorian LPG Ltd.(a) 143,730 1,598,278
Green Plains, Inc. 167,880 2,012,881
Gulfport Energy Corp.(a) 721,920 591,686
HighPoint Resources Corp.(a) 541,300 368,463
Laredo Petroleum, Inc.(a) 895,210 966,827
Oasis Petroleum, Inc.(a) 1,436,430 2,348,563
Par Pacific Holdings, Inc.(a) 183,050 3,036,799
PDC Energy, Inc.(a) 482,257 9,177,351
Penn Virginia Corp.(a) 66,860 1,063,074
QEP Resources, Inc. 1,181,180 2,657,655
Range Resources Corp. 1,036,590 2,871,354
Renewable Energy Group, Inc.(a) 193,540 5,119,133
REX American Resources Corp.(a) 27,820 1,947,678
Ring Energy, Inc.(a) 296,420 417,952
SM Energy Co. 526,960 3,462,127
Southwestern Energy Co.(a) 2,688,770 3,818,053
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Small Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Talos Energy, Inc.(a) 99,610 1,414,462
Whiting Petroleum Corp.(a) 453,510 838,994
Total   52,190,398
Total Energy 102,519,046
Financials 17.8%
Banks 9.2%
Allegiance Bancshares, Inc. 95,100 3,154,467
Ameris Bancorp 325,260 11,117,387
Banc of California, Inc. 222,840 3,416,137
Banner Corp. 185,133 8,449,470
Berkshire Hills Bancorp, Inc. 213,330 5,207,385
Boston Private Financial Holdings, Inc. 413,485 4,033,546
Brookline Bancorp, Inc. 396,224 5,495,627
Cadence BanCorp 635,880 8,978,626
Central Pacific Financial Corp. 140,960 3,371,763
City Holding Co. 80,980 5,662,122
Columbia Banking System, Inc. 358,315 11,896,058
Community Bank System, Inc. 256,820 15,617,224
Customers Bancorp, Inc.(a) 143,130 2,904,108
CVB Financial Corp. 661,154 12,257,795
Dime Community Bancshares, Inc. 153,174 2,570,260
Eagle Bancorp, Inc. 166,820 6,242,404
First BanCorp 1,079,679 8,572,651
First Commonwealth Financial Corp. 488,362 5,762,672
First Financial Bancorp 493,655 10,169,293
First Midwest Bancorp, Inc. 546,252 9,914,474
Franklin Financial Network, Inc. 66,520 2,227,755
Glacier Bancorp, Inc. 425,867 15,880,580
Great Western Bancorp, Inc. 279,580 7,512,315
Hanmi Financial Corp. 154,550 2,410,980
Heritage Financial Corp. 181,890 4,218,029
Hope Bancorp, Inc. 629,352 7,684,388
Independent Bank Corp. 170,746 11,530,477
National Bank Holdings Corp., Class A 154,830 4,736,250
NBT Bancorp, Inc. 217,530 7,328,586
OFG Bancorp 255,050 4,269,537
Old National Bancorp 844,586 13,310,675
Opus Bank 107,310 2,540,028
Pacific Premier Bancorp, Inc. 294,880 7,616,750
Common Stocks (continued)
Issuer Shares Value ($)
Preferred Bank 67,590 3,455,877
S&T Bancorp, Inc. 191,407 6,291,548
Seacoast Banking Corp. of Florida(a) 255,720 6,367,428
ServisFirst Bancshares, Inc. 228,940 7,909,877
Simmons First National Corp., Class A 566,094 12,103,090
Southside Bancshares, Inc. 157,675 5,080,288
Tompkins Financial Corp. 60,853 4,836,596
Triumph Bancorp, Inc.(a) 115,880 3,924,856
United Community Banks, Inc. 392,325 9,717,890
Veritex Holdings, Inc. 234,621 5,647,327
Westamerica Bancorporation 134,390 7,770,430
Total   309,165,026
Capital Markets 0.8%
Blucora, Inc.(a) 243,109 4,230,097
Donnelley Financial Solutions, Inc.(a) 155,046 1,348,900
Greenhill & Co., Inc. 73,930 1,080,857
INTL FCStone, Inc.(a) 80,910 3,685,450
Piper Sandler Companies 79,108 5,543,889
Virtus Investment Partners, Inc. 36,377 4,016,021
Waddell & Reed Financial, Inc., Class A 349,310 4,806,505
WisdomTree Investments, Inc. 585,950 2,378,957
Total   27,090,676
Consumer Finance 0.8%
Encore Capital Group, Inc.(a) 137,305 5,102,254
Enova International, Inc.(a) 167,741 3,223,982
Ezcorp, Inc., Class A(a) 261,104 1,253,299
Green Dot Corp., Class A(a) 235,340 8,039,214
PRA Group, Inc.(a) 225,564 8,756,395
World Acceptance Corp.(a) 27,520 2,149,312
Total   28,524,456
Diversified Financial Services 0.2%
FGL Holdings 649,620 7,431,653
Insurance 2.9%
Ambac Financial Group, Inc.(a) 226,280 4,349,102
American Equity Investment Life Holding Co. 452,250 11,432,880
AMERISAFE, Inc. 95,870 6,247,848
eHealth, Inc.(a) 100,968 11,848,595
Employers Holdings, Inc. 158,036 6,090,708
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
11

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
HCI Group, Inc. 31,860 1,354,687
Horace Mann Educators Corp. 204,747 7,970,801
James River Group Holdings Ltd. 151,030 6,103,122
Kinsale Capital Group, Inc. 102,360 12,433,669
ProAssurance Corp. 267,196 7,254,371
Safety Insurance Group, Inc. 72,597 5,716,288
Stewart Information Services Corp. 117,760 4,260,557
Third Point Reinsurance Ltd.(a) 397,820 3,548,554
United Fire Group, Inc. 105,685 4,051,963
United Insurance Holdings Corp. 103,080 968,952
Universal Insurance Holdings, Inc. 151,770 3,140,121
Total   96,772,218
Mortgage Real Estate Investment Trusts (REITS) 2.2%
Apollo Commercial Real Estate Finance, Inc. 709,270 11,490,174
ARMOUR Residential REIT, Inc. 292,520 5,288,762
Capstead Mortgage Corp. 469,935 3,336,538
Granite Point Mortgage Trust, Inc. 272,470 4,473,957
Invesco Mortgage Capital, Inc. 798,750 12,843,900
KKR Real Estate Finance Trust, Inc. 119,930 2,355,425
New York Mortgage Trust, Inc. 1,814,890 10,344,873
PennyMac Mortgage Investment Trust 497,630 10,300,941
Ready Capital Corp. 175,130 2,539,385
Redwood Trust, Inc. 559,760 9,560,701
Total   72,534,656
Thrifts & Mortgage Finance 1.7%
Axos Financial, Inc.(a) 264,860 6,597,663
Flagstar Bancorp, Inc. 171,230 5,458,812
HomeStreet, Inc. 121,260 3,284,933
Meta Financial Group, Inc. 171,750 5,641,988
NMI Holdings, Inc., Class A(a) 337,680 7,881,451
Northfield Bancorp, Inc. 214,950 3,037,244
Northwest Bancshares, Inc. 498,076 6,918,276
Provident Financial Services, Inc. 298,281 5,959,654
TrustCo Bank Corp. 481,415 3,302,507
Walker & Dunlop, Inc. 142,360 9,232,046
Total   57,314,574
Total Financials 598,833,259
Common Stocks (continued)
Issuer Shares Value ($)
Health Care 12.3%
Biotechnology 2.1%
Acorda Therapeutics, Inc.(a) 238,575 343,548
AMAG Pharmaceuticals, Inc.(a) 168,470 1,305,642
Anika Therapeutics, Inc.(a) 70,880 2,959,949
Cytokinetics, Inc.(a) 293,480 4,091,111
Eagle Pharmaceuticals, Inc.(a) 50,250 2,306,475
Emergent Biosolutions, Inc.(a) 217,969 12,790,421
Enanta Pharmaceuticals, Inc.(a) 79,370 4,038,346
Momenta Pharmaceuticals, Inc.(a) 563,981 15,955,022
Myriad Genetics, Inc.(a) 369,510 6,510,766
Progenics Pharmaceuticals, Inc.(a) 429,280 2,026,202
REGENXBIO, Inc.(a) 155,690 6,227,600
Spectrum Pharmaceuticals, Inc.(a) 561,165 1,604,932
Vanda Pharmaceuticals, Inc.(a) 264,940 2,922,288
Xencor, Inc.(a) 245,120 7,963,949
Total   71,046,251
Health Care Equipment & Supplies 3.3%
Angiodynamics, Inc.(a) 186,870 2,147,136
Cardiovascular Systems, Inc.(a) 174,850 6,577,857
CONMED Corp. 140,968 13,341,212
CryoLife, Inc.(a) 186,290 4,774,613
Cutera, Inc.(a) 70,700 1,751,946
Heska Corp.(a) 35,000 3,341,450
Inogen, Inc.(a) 90,690 4,151,788
Integer Holdings Corp.(a) 162,322 14,636,575
Invacare Corp. 167,272 1,267,922
Lantheus Holdings, Inc.(a) 194,960 3,031,628
LeMaitre Vascular, Inc. 81,430 2,320,755
Meridian Bioscience, Inc.(a) 212,310 1,696,357
Merit Medical Systems, Inc.(a) 274,238 9,875,310
Mesa Laboratories, Inc. 19,950 4,773,836
Natus Medical, Inc.(a) 169,330 4,551,590
Neogen Corp.(a) 260,395 15,818,996
OraSure Technologies, Inc.(a) 306,610 1,848,858
Orthofix Medical, Inc.(a) 94,650 3,344,931
SurModics, Inc.(a) 67,299 2,349,408
 
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Small Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Tactile Systems Technology, Inc.(a) 94,520 4,764,753
Varex Imaging Corp.(a) 190,600 4,425,732
Total   110,792,653
Health Care Providers & Services 3.5%
Addus HomeCare Corp.(a) 67,240 5,128,395
AMN Healthcare Services, Inc.(a) 232,030 17,077,408
BioTelemetry, Inc.(a) 168,840 7,212,845
Community Health Systems, Inc.(a) 585,360 2,885,825
Corvel Corp.(a) 44,488 3,067,003
Covetrus, Inc.(a) 484,540 5,383,239
Cross Country Healthcare, Inc.(a) 183,181 1,736,556
Ensign Group, Inc. (The) 249,118 11,085,751
Hanger, Inc.(a) 185,470 4,278,793
LHC Group, Inc.(a) 147,130 17,870,410
Magellan Health, Inc.(a) 108,176 6,491,642
Owens & Minor, Inc. 312,200 2,132,326
Pennant Group, Inc. (The)(a) 130,029 3,532,888
Providence Service Corp. (The)(a) 57,020 3,522,695
RadNet, Inc.(a) 207,260 4,234,322
Select Medical Holdings Corp.(a) 533,790 12,778,932
Tivity Health, Inc.(a) 214,557 2,718,437
U.S. Physical Therapy, Inc. 63,450 6,612,759
Total   117,750,226
Health Care Technology 1.2%
Computer Programs & Systems, Inc. 62,041 1,661,458
HealthStream, Inc.(a) 127,059 3,090,075
HMS Holdings Corp.(a) 437,610 10,051,902
NextGen Healthcare, Inc.(a) 240,513 3,145,910
Omnicell, Inc.(a) 208,315 16,971,423
Tabula Rasa HealthCare, Inc.(a) 97,650 5,485,000
Total   40,405,768
Life Sciences Tools & Services 1.0%
Luminex Corp. 208,124 5,153,150
Medpace Holdings, Inc.(a) 136,020 12,233,639
NeoGenomics, Inc.(a) 518,620 14,692,505
Total   32,079,294
Common Stocks (continued)
Issuer Shares Value ($)
Pharmaceuticals 1.2%
Akorn, Inc.(a) 469,950 545,142
Amphastar Pharmaceuticals, Inc.(a) 170,200 2,619,378
ANI Pharmaceuticals, Inc.(a) 46,200 2,218,062
Corcept Therapeutics, Inc.(a) 510,900 6,447,558
Endo International PLC(a) 1,002,550 5,534,076
Innoviva, Inc.(a) 332,030 4,472,444
Lannett Co., Inc.(a) 166,290 1,446,723
Pacira Pharmaceuticals, Inc.(a) 207,290 8,992,241
Phibro Animal Health Corp., Class A 100,780 2,544,695
Supernus Pharmaceuticals, Inc.(a) 260,600 4,688,194
Total   39,508,513
Total Health Care 411,582,705
Industrials 18.0%
Aerospace & Defense 1.7%
AAR Corp. 163,283 5,641,427
Aerojet Rocketdyne Holdings, Inc.(a) 359,617 17,721,926
Aerovironment, Inc.(a) 107,249 5,511,526
Cubic Corp. 155,347 8,457,091
Moog, Inc., Class A 160,124 12,348,763
National Presto Industries, Inc. 25,027 1,966,622
Park Aerospace Corp. 96,827 1,346,863
Triumph Group, Inc. 248,790 4,727,010
Total   57,721,228
Air Freight & Logistics 0.7%
Atlas Air Worldwide Holdings, Inc.(a) 128,505 3,433,654
Echo Global Logistics, Inc.(a) 135,580 2,501,451
Forward Air Corp. 139,939 8,257,800
HUB Group, Inc., Class A(a) 165,787 7,664,333
Total   21,857,238
Airlines 0.8%
Allegiant Travel Co. 65,532 8,882,207
Hawaiian Holdings, Inc. 231,430 4,832,258
Skywest, Inc. 250,459 11,370,839
Total   25,085,304
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
13

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Building Products 2.3%
AAON, Inc. 201,849 11,103,714
American Woodmark Corp.(a) 77,330 6,477,934
Apogee Enterprises, Inc. 131,900 3,982,061
Gibraltar Industries, Inc.(a) 160,307 8,122,756
Griffon Corp. 211,575 3,681,405
Insteel Industries, Inc. 90,890 1,807,802
Patrick Industries, Inc. 110,960 5,862,017
PGT, Inc.(a) 290,110 4,400,969
Quanex Building Products Corp. 164,724 2,767,363
Simpson Manufacturing Co., Inc. 200,366 15,915,071
Universal Forest Products, Inc. 304,940 14,289,488
Total   78,410,580
Commercial Services & Supplies 2.2%
ABM Industries, Inc. 329,908 10,860,571
Brady Corp., Class A 247,196 11,702,259
Harsco Corp.(a) 390,470 4,681,735
Interface, Inc. 290,179 4,233,712
Matthews International Corp., Class A 155,670 4,601,605
Mobile Mini, Inc. 219,169 8,545,399
Pitney Bowes, Inc. 848,650 2,902,383
RR Donnelley & Sons Co. 352,183 669,148
Team, Inc.(a) 150,830 1,920,066
Unifirst Corp. 76,012 14,123,790
US Ecology, Inc. 126,410 5,316,805
Viad Corp. 100,962 5,068,292
Total   74,625,765
Construction & Engineering 0.8%
Aegion Corp.(a) 152,788 2,751,712
Arcosa, Inc. 240,370 10,326,295
Comfort Systems U.S.A., Inc. 182,183 7,691,766
Granite Construction, Inc. 232,170 4,717,695
MYR Group, Inc.(a) 82,700 2,109,677
Total   27,597,145
Common Stocks (continued)
Issuer Shares Value ($)
Electrical Equipment 0.7%
AZZ, Inc. 129,905 4,792,195
Encore Wire Corp. 104,124 5,098,952
Powell Industries, Inc. 43,745 1,462,395
Sunrun, Inc.(a) 387,040 7,485,354
Vicor Corp.(a) 91,069 3,937,824
Total   22,776,720
Industrial Conglomerates 0.2%
Raven Industries, Inc. 177,630 5,099,757
Machinery 5.8%
Alamo Group, Inc. 48,170 5,335,791
Albany International Corp., Class A 152,492 9,770,162
Astec Industries, Inc. 111,987 4,205,112
Barnes Group, Inc. 236,800 12,716,160
Briggs & Stratton Corp. 211,034 668,978
Chart Industries, Inc.(a) 177,820 10,121,514
CIRCOR International, Inc.(a) 98,902 3,558,494
Enerpac Tool Group Corp. 267,624 5,719,125
EnPro Industries, Inc. 103,243 5,569,960
ESCO Technologies, Inc. 129,052 11,733,408
Federal Signal Corp. 300,556 8,716,124
Franklin Electric Co., Inc. 191,146 9,880,337
Greenbrier Companies, Inc. (The) 161,910 3,923,079
Hillenbrand, Inc. 368,115 8,613,891
John Bean Technologies Corp. 157,298 15,235,884
Lindsay Corp. 53,708 5,318,703
Lydall, Inc.(a) 87,038 1,036,623
Meritor, Inc.(a) 367,130 8,330,180
Mueller Industries, Inc. 282,900 7,915,542
Proto Labs, Inc.(a) 132,920 11,649,109
SPX Corp.(a) 219,280 9,194,410
SPX FLOW, Inc.(a) 211,440 7,776,763
Standex International Corp. 61,898 3,926,190
Tennant Co. 90,740 6,491,540
Titan International, Inc. 248,560 551,803
Wabash National Corp. 268,690 2,950,216
Watts Water Technologies, Inc., Class A 137,105 12,875,531
Total   193,784,629
 
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Small Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Marine 0.2%
Matson, Inc. 212,930 7,071,405
Professional Services 1.2%
Exponent, Inc. 257,450 18,961,192
Forrester Research, Inc.(a) 52,730 1,901,444
Heidrick & Struggles International, Inc. 95,222 2,123,450
Kelly Services, Inc., Class A 164,849 2,738,142
Korn/Ferry International 274,767 9,611,350
Resources Connection, Inc. 149,537 1,873,699
TrueBlue, Inc.(a) 193,501 2,879,295
Total   40,088,572
Road & Rail 0.6%
ArcBest Corp. 126,705 2,510,026
Heartland Express, Inc. 232,226 4,159,168
Marten Transport Ltd. 192,873 3,768,739
Saia, Inc.(a) 128,830 11,248,147
Total   21,686,080
Trading Companies & Distributors 0.8%
Applied Industrial Technologies, Inc. 192,011 11,326,729
DXP Enterprises, Inc.(a) 79,570 2,258,992
Foundation Building Materials, Inc.(a) 87,550 1,365,780
GMS, Inc.(a) 209,460 4,786,161
Kaman Corp. 138,391 7,675,165
Veritiv Corp.(a) 63,180 760,687
Total   28,173,514
Total Industrials 603,977,937
Information Technology 14.1%
Communications Equipment 1.1%
ADTRAN, Inc. 237,560 1,911,170
Applied Optoelectronics, Inc.(a) 94,930 847,725
CalAmp Corp.(a) 169,485 1,630,446
Comtech Telecommunications Corp. 121,147 3,394,539
Digi International, Inc.(a) 140,647 1,862,166
Extreme Networks, Inc.(a) 603,860 3,037,416
Harmonic, Inc.(a) 448,756 2,755,362
NETGEAR, Inc.(a) 149,755 2,825,877
Common Stocks (continued)
Issuer Shares Value ($)
Plantronics, Inc. 162,580 2,232,223
Viavi Solutions, Inc.(a) 1,141,430 15,055,462
Total   35,552,386
Electronic Equipment, Instruments & Components 4.5%
Anixter International, Inc.(a) 149,551 14,582,718
Arlo Technologies, Inc.(a) 376,057 1,233,467
Badger Meter, Inc. 144,606 8,706,727
Bel Fuse, Inc., Class B 50,310 575,546
Benchmark Electronics, Inc. 186,901 5,079,969
CTS Corp. 161,947 4,221,958
Daktronics, Inc. 186,133 915,774
ePlus, Inc.(a) 67,090 5,082,738
Fabrinet(a) 183,800 10,131,056
FARO Technologies, Inc.(a) 86,446 4,948,169
Insight Enterprises, Inc.(a) 177,764 9,793,019
Itron, Inc.(a) 174,920 13,265,933
KEMET Corp. 288,560 7,525,645
Knowles Corp.(a) 427,440 7,104,053
Methode Electronics, Inc. 184,241 5,648,829
MTS Systems Corp. 88,421 3,549,219
OSI Systems, Inc.(a) 84,797 6,891,452
PC Connection, Inc. 54,910 2,233,190
Plexus Corp.(a) 144,944 9,617,035
Rogers Corp.(a) 92,256 10,701,696
Sanmina Corp.(a) 347,590 9,138,141
Scansource, Inc.(a) 125,505 3,568,107
TTM Technologies, Inc.(a) 487,333 6,330,456
Total   150,844,897
IT Services 2.3%
Cardtronics PLC, Class A(a) 179,468 6,509,305
CSG Systems International, Inc. 163,657 7,241,822
EVERTEC, Inc. 296,540 8,801,307
ExlService Holdings, Inc.(a) 169,360 12,642,724
Mantech International Corp., Class A 133,690 10,013,381
NIC, Inc. 332,635 6,083,894
Perficient, Inc.(a) 161,983 6,636,444
Sykes Enterprises, Inc.(a) 191,403 6,063,647
TTEC Holdings, Inc. 87,745 3,284,295
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
15

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Unisys Corp.(a) 257,240 3,994,937
Virtusa Corp.(a) 148,248 6,539,219
Total   77,810,975
Semiconductors & Semiconductor Equipment 3.5%
Advanced Energy Industries, Inc.(a) 190,293 11,317,676
Axcelis Technologies, Inc.(a) 161,040 3,863,350
Brooks Automation, Inc. 359,119 12,393,197
Ceva, Inc.(a) 109,245 3,103,650
Cohu, Inc. 204,976 4,195,859
Diodes, Inc.(a) 205,367 9,038,202
DSP Group, Inc.(a) 114,263 1,555,119
Formfactor, Inc.(a) 376,020 8,411,567
Ichor Holdings Ltd.(a) 111,740 3,231,521
Kulicke & Soffa Industries, Inc. 314,965 7,190,651
MaxLinear, Inc., Class A(a) 323,490 5,001,155
Onto Innovation, Inc.(a) 243,699 7,449,878
PDF Solutions, Inc.(a) 138,190 2,023,102
Photronics, Inc.(a) 333,790 4,155,686
Power Integrations, Inc. 146,144 12,721,835
Rambus, Inc.(a) 553,820 7,742,404
SMART Global Holdings, Inc.(a) 65,350 1,753,994
Ultra Clean Holdings, Inc.(a) 197,730 4,134,534
Veeco Instruments, Inc.(a) 242,914 3,252,618
Xperi Corp. 246,084 4,230,184
Total   116,766,182
Software 2.5%
8x8, Inc.(a) 497,850 9,210,225
Agilysys, Inc.(a) 101,064 3,247,187
Alarm.com Holdings, Inc.(a) 180,950 8,730,838
Bottomline Technologies de, Inc.(a) 189,322 8,383,178
Ebix, Inc. 110,578 2,923,682
LivePerson, Inc.(a) 305,802 8,091,521
MicroStrategy, Inc., Class A(a) 40,889 5,526,557
OneSpan, Inc.(a) 161,753 2,670,542
Progress Software Corp. 222,463 8,295,645
Qualys, Inc.(a) 165,590 13,277,006
SPS Commerce, Inc.(a) 173,050 9,102,430
TiVo Corp. 629,070 4,762,060
Total   84,220,871
Common Stocks (continued)
Issuer Shares Value ($)
Technology Hardware, Storage & Peripherals 0.2%
3D Systems Corp.(a) 588,230 5,388,187
Diebold, Inc.(a) 381,460 2,677,849
Total   8,066,036
Total Information Technology 473,261,347
Materials 4.5%
Chemicals 2.6%
AdvanSix, Inc.(a) 138,650 2,014,584
American Vanguard Corp. 131,951 2,012,253
Balchem Corp. 159,792 15,093,952
Ferro Corp.(a) 407,160 4,731,199
FutureFuel Corp. 128,200 1,303,794
GCP Applied Technologies(a) 267,180 5,201,995
Hawkins, Inc. 46,987 1,679,785
HB Fuller Co. 253,243 9,934,723
Innospec, Inc. 121,680 10,530,187
Koppers Holdings, Inc.(a) 102,812 2,247,470
Kraton Performance Polymers, Inc.(a) 157,485 1,593,748
Livent Corp.(a) 725,130 6,475,411
LSB Industries, Inc.(a) 108,655 211,877
Quaker Chemical Corp. 64,303 10,132,224
Rayonier Advanced Materials, Inc. 248,050 607,723
Stepan Co. 99,489 8,738,119
Tredegar Corp. 122,588 2,091,351
Trinseo SA 194,620 4,258,286
Total   88,858,681
Construction Materials 0.1%
U.S. Concrete, Inc.(a) 78,800 2,114,992
Containers & Packaging 0.1%
Myers Industries, Inc. 176,439 2,394,277
Metals & Mining 1.0%
AK Steel Holding Corp.(a) 1,571,885 3,631,054
Century Aluminum Co.(a) 247,274 1,434,189
Cleveland-Cliffs, Inc. 1,341,580 7,794,580
Haynes International, Inc. 62,164 1,573,371
Kaiser Aluminum Corp. 78,879 7,458,009
Materion Corp. 101,349 4,595,164
Olympic Steel, Inc. 45,334 546,275
 
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Small Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
SunCoke Energy, Inc. 430,937 1,986,619
TimkenSteel Corp.(a) 198,140 1,004,570
Warrior Met Coal, Inc. 253,690 4,495,387
Total   34,519,218
Paper & Forest Products 0.7%
Boise Cascade Co. 193,600 6,868,928
Clearwater Paper Corp.(a) 82,041 2,237,258
Mercer International, Inc. 198,860 1,761,900
Neenah, Inc. 83,525 4,825,239
PH Glatfelter Co. 219,409 3,128,772
Schweitzer-Mauduit International, Inc. 153,477 5,175,245
Total   23,997,342
Total Materials 151,884,510
Real Estate 8.7%
Equity Real Estate Investment Trusts (REITS) 8.3%
Acadia Realty Trust 431,902 9,864,642
Agree Realty Corp. 226,195 16,245,325
Alexander & Baldwin, Inc. 337,390 6,342,932
American Assets Trust, Inc. 238,260 9,875,877
Armada Hoffler Properties, Inc. 275,300 4,614,028
CareTrust REIT, Inc. 474,656 9,906,071
CBL & Associates Properties, Inc. 861,840 457,465
Cedar Realty Trust, Inc. 426,896 1,105,661
Chatham Lodging Trust 233,090 3,249,275
Community Healthcare Trust, Inc. 94,220 4,487,699
DiamondRock Hospitality Co. 994,428 9,069,183
Easterly Government Properties, Inc. 368,370 8,756,155
Essential Properties Realty Trust, Inc. 436,790 10,006,859
Four Corners Property Trust, Inc. 342,334 9,821,562
Franklin Street Properties Corp. 532,645 3,797,759
Getty Realty Corp. 169,866 4,814,002
Global Net Lease, Inc. 444,360 8,198,442
Hersha Hospitality Trust 178,370 2,056,606
Independence Realty Trust, Inc. 451,500 5,986,890
Industrial Logistics Properties Trust 323,770 6,689,088
Innovative Industrial Properties, Inc. 84,620 7,779,963
Investors Real Estate Trust 57,740 4,067,783
iStar, Inc. 370,970 5,612,776
Kite Realty Group Trust 417,140 6,736,811
Common Stocks (continued)
Issuer Shares Value ($)
Lexington Realty Trust 1,231,249 12,768,052
LTC Properties, Inc. 197,461 8,852,177
National Storage Affiliates Trust 294,700 9,943,178
NexPoint Residential Trust, Inc. 111,920 4,980,440
Office Properties Income Trust 239,435 6,974,741
Pennsylvania Real Estate Investment Trust 296,774 700,387
Retail Opportunity Investments Corp. 576,180 8,642,700
RPT Realty 399,250 5,174,280
Safehold, Inc. 61,710 3,370,600
Saul Centers, Inc. 58,522 2,517,031
Summit Hotel Properties, Inc. 522,380 4,842,463
Tanger Factory Outlet Centers, Inc. 461,420 5,527,812
Uniti Group, Inc. 960,050 9,370,088
Universal Health Realty Income Trust 62,866 6,771,925
Urstadt Biddle Properties, Inc., Class A 148,486 3,060,296
Washington Prime Group, Inc. 926,890 2,548,947
Washington Real Estate Investment Trust 400,340 10,749,129
Whitestone REIT 201,840 2,480,614
Xenia Hotels & Resorts, Inc. 559,520 8,370,419
Total   277,188,133
Real Estate Management & Development 0.4%
Marcus & Millichap, Inc.(a) 116,630 3,727,495
RE/MAX Holdings, Inc., Class A 88,600 2,582,690
Realogy Holdings Corp. 567,960 5,264,989
St. Joe Co. (The)(a) 156,420 3,076,781
Total   14,651,955
Total Real Estate 291,840,088
Utilities 2.3%
Electric Utilities 0.4%
El Paso Electric Co. 202,345 13,733,155
Gas Utilities 0.7%
Northwest Natural Holding Co. 151,185 9,943,437
South Jersey Industries, Inc. 458,936 12,414,219
Total   22,357,656
Multi-Utilities 0.5%
Avista Corp. 331,364 15,623,813
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
17

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Water Utilities 0.7%
American States Water Co. 182,994 14,015,511
California Water Service Group 239,150 11,469,634
Total   25,485,145
Total Utilities 77,199,769
Total Common Stocks
(Cost $2,766,560,541)
3,351,196,253
Exchange-Traded Equity Funds 0.3%
  Shares Value ($)
U.S. Small Cap 0.3%
iShares Core S&P Small-Cap ETF 117,500 8,552,825
Total Exchange-Traded Equity Funds
(Cost $8,561,050)
8,552,825
Rights 0.0%
Issuer Shares Value ($)
Industrials 0.0%
Industrial Conglomerates 0.0%
A. Schulman, Inc. CVR(a),(b),(c) 164,023 328,046
Total Industrials 328,046
Total Rights
(Cost $328,046)
328,046
Money Market Funds 0.1%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(d),(e) 4,270,988 4,270,988
Total Money Market Funds
(Cost $4,270,561)
4,270,988
Total Investments in Securities
(Cost: $2,779,720,198)
3,364,348,112
Other Assets & Liabilities, Net   (7,294,676)
Net Assets 3,357,053,436
 
At February 29, 2020, securities and/or cash totaling $620,800 were pledged as collateral.
Investments in derivatives
Long futures contracts
Description Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
Russell 2000 Index E-mini 11 03/2020 USD 811,195 (86,815)
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At February 29, 2020, the total value of these securities amounted to $328,046, which represents 0.01% of total net assets.
(c) Valuation based on significant unobservable inputs.
(d) The rate shown is the seven-day current annualized yield at February 29, 2020.
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Small Cap Index Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Notes to Portfolio of Investments  (continued)
(e) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  82,523,982 752,061,557 (830,314,551) 4,270,988 6,949 427 885,495 4,270,988
Abbreviation Legend
CVR Contingent Value Rights
Currency Legend
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
19

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 81,324,027 81,324,027
Consumer Discretionary 451,778,712 451,778,712
Consumer Staples 106,994,853 106,994,853
Energy 102,519,046 102,519,046
Financials 598,833,259 598,833,259
Health Care 411,582,705 411,582,705
Industrials 603,977,937 603,977,937
Information Technology 473,261,347 473,261,347
Materials 151,884,510 151,884,510
Real Estate 291,840,088 291,840,088
Utilities 77,199,769 77,199,769
Total Common Stocks 3,351,196,253 3,351,196,253
Exchange-Traded Equity Funds 8,552,825 8,552,825
Rights        
Industrials 328,046 328,046
Total Rights 328,046 328,046
Money Market Funds 4,270,988 4,270,988
Total Investments in Securities 3,364,020,066 328,046 3,364,348,112
Investments in Derivatives        
Liability        
Futures Contracts (86,815) (86,815)
Total 3,363,933,251 328,046 3,364,261,297
See the Portfolio of Investments for all investment classifications not indicated in the table.
Derivative instruments are valued at unrealized appreciation (depreciation).
The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Small Cap Index Fund  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $2,775,449,637) $3,360,077,124
Affiliated issuers (cost $4,270,561) 4,270,988
Margin deposits on:  
Futures contracts 620,800
Receivable for:  
Capital shares sold 7,819,462
Dividends 2,218,894
Expense reimbursement due from Investment Manager 94
Total assets 3,375,007,362
Liabilities  
Payable for:  
Investments purchased 2,288,885
Capital shares purchased 15,184,316
Variation margin for futures contracts 217,174
Management services fees 18,735
Distribution and/or service fees 7,199
Compensation of board members 237,617
Total liabilities 17,953,926
Net assets applicable to outstanding capital stock $3,357,053,436
Represented by  
Paid in capital 2,763,716,203
Total distributable earnings (loss) 593,337,233
Total - representing net assets applicable to outstanding capital stock $3,357,053,436
Class A  
Net assets $1,032,676,992
Shares outstanding 50,811,005
Net asset value per share $20.32
Institutional Class  
Net assets $1,603,859,422
Shares outstanding 78,352,617
Net asset value per share $20.47
Institutional 2 Class  
Net assets $638,046,131
Shares outstanding 30,408,169
Net asset value per share $20.98
Institutional 3 Class  
Net assets $82,470,891
Shares outstanding 4,142,884
Net asset value per share $19.91
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
21

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $58,620,294
Dividends — affiliated issuers 885,495
Foreign taxes withheld (25,028)
Total income 59,480,761
Expenses:  
Management services fees 7,989,133
Distribution and/or service fees  
Class A 3,213,366
Compensation of board members 86,632
Interest on interfund lending 1,825
Other 20,640
Total expenses 11,311,596
Fees waived or expenses reimbursed by Investment Manager and its affiliates (132,424)
Expense reduction (1,700)
Total net expenses 11,177,472
Net investment income 48,303,289
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 192,732,622
Investments — affiliated issuers 6,949
Futures contracts 9,644
Net realized gain 192,749,215
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (525,802,107)
Investments — affiliated issuers 427
Futures contracts (7,296,645)
Net change in unrealized appreciation (depreciation) (533,098,325)
Net realized and unrealized loss (340,349,110)
Net decrease in net assets resulting from operations $(292,045,821)
The accompanying Notes to Financial Statements are an integral part of this statement.
22 Columbia Small Cap Index Fund  | Annual Report 2020

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $48,303,289 $45,732,145
Net realized gain 192,749,215 336,761,566
Net change in unrealized appreciation (depreciation) (533,098,325) (131,987,680)
Net increase (decrease) in net assets resulting from operations (292,045,821) 250,506,031
Distributions to shareholders    
Net investment income and net realized gains    
Class A (79,317,130) (138,189,343)
Institutional Class (119,535,076) (190,181,500)
Institutional 2 Class (47,099,472) (65,475,539)
Institutional 3 Class (5,489,399) (5,811,465)
Class T (26,604)
Total distributions to shareholders (251,441,077) (399,684,451)
Increase (decrease) in net assets from capital stock activity (386,733,006) 490,156,857
Total increase (decrease) in net assets (930,219,904) 340,978,437
Net assets at beginning of year 4,287,273,340 3,946,294,903
Net assets at end of year $3,357,053,436 $4,287,273,340
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
23

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 9,413,627 215,248,040 15,655,887 395,797,918
Distributions reinvested 3,011,038 68,514,539 5,217,324 120,100,570
Redemptions (22,806,332) (519,492,529) (20,840,413) (518,791,016)
Net increase (decrease) (10,381,667) (235,729,950) 32,798 (2,892,528)
Institutional Class        
Subscriptions 14,677,533 337,285,084 24,634,983 622,818,261
Distributions reinvested 3,895,130 89,337,745 5,963,857 137,882,592
Redemptions (25,782,422) (591,445,484) (21,316,512) (527,511,753)
Net increase (decrease) (7,209,759) (164,822,655) 9,282,328 233,189,100
Institutional 2 Class        
Subscriptions 11,503,124 270,539,248 14,705,902 379,016,972
Distributions reinvested 1,759,413 41,351,061 2,514,445 59,405,165
Redemptions (13,735,398) (322,112,787) (9,723,235) (247,933,263)
Net increase (decrease) (472,861) (10,222,478) 7,497,112 190,488,874
Institutional 3 Class        
Subscriptions 1,205,971 27,098,539 2,780,764 69,603,523
Distributions reinvested 241,971 5,407,744 252,853 5,685,170
Redemptions (378,673) (8,464,206) (141,040) (3,318,182)
Net increase 1,069,269 24,042,077 2,892,577 71,970,511
Class K        
Subscriptions 502 12,752
Redemptions (90,475) (2,326,799)
Net decrease (89,973) (2,314,047)
Class T        
Distributions reinvested 1,155 26,350
Redemptions (14,378) (311,403)
Net decrease (13,223) (285,053)
Total net increase (decrease) (16,995,018) (386,733,006) 19,601,619 490,156,857
The accompanying Notes to Financial Statements are an integral part of this statement.
24 Columbia Small Cap Index Fund  | Annual Report 2020

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Columbia Small Cap Index Fund  | Annual Report 2020
25

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $23.54 0.24 (2.00) (1.76) (0.26) (1.20) (1.46)
Year Ended 2/28/2019 $24.33 0.23 1.32 1.55 (0.23) (2.11) (2.34)
Year Ended 2/28/2018 $23.83 0.21 2.11 2.32 (0.22) (1.60) (1.82)
Year Ended 2/28/2017 $19.05 0.19 6.28 6.47 (0.19) (1.50) (1.69)
Year Ended 2/29/2016 $23.29 0.22 (2.25) (2.03) (0.22) (1.99) (2.21)
Institutional Class
Year Ended 2/29/2020 $23.69 0.30 (2.02) (1.72) (0.30) (1.20) (1.50)
Year Ended 2/28/2019 $24.47 0.29 1.33 1.62 (0.29) (2.11) (2.40)
Year Ended 2/28/2018 $23.96 0.27 2.12 2.39 (0.28) (1.60) (1.88)
Year Ended 2/28/2017 $19.14 0.24 6.32 6.56 (0.24) (1.50) (1.74)
Year Ended 2/29/2016 $23.39 0.27 (2.25) (1.98) (0.28) (1.99) (2.27)
Institutional 2 Class
Year Ended 2/29/2020 $24.25 0.30 (2.07) (1.77) (0.30) (1.20) (1.50)
Year Ended 2/28/2019 $24.99 0.30 1.36 1.66 (0.29) (2.11) (2.40)
Year Ended 2/28/2018 $24.43 0.28 2.16 2.44 (0.28) (1.60) (1.88)
Year Ended 2/28/2017 $19.49 0.25 6.43 6.68 (0.24) (1.50) (1.74)
Year Ended 2/29/2016 $23.78 0.28 (2.30) (2.02) (0.28) (1.99) (2.27)
Institutional 3 Class
Year Ended 2/29/2020 $23.08 0.29 (1.96) (1.67) (0.30) (1.20) (1.50)
Year Ended 2/28/2019 $23.90 0.29 1.29 1.58 (0.29) (2.11) (2.40)
Year Ended 2/28/2018(e) $23.87 0.24 1.67 1.91 (0.28) (1.60) (1.88)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) Ratios include interfund lending expense which is less than 0.01%.
(d) The benefits derived from expense reductions had an impact of less than 0.01%.
(e) Institutional 3 Class shares commenced operations on March 1, 2017. Per share data and total return reflect activity from that date.
The accompanying Notes to Financial Statements are an integral part of this statement.
26 Columbia Small Cap Index Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $20.32 (8.08%) 0.45%(c) 0.45%(c),(d) 1.04% 17% $1,032,677
Year Ended 2/28/2019 $23.54 6.70% 0.45% 0.45%(d) 0.89% 22% $1,440,665
Year Ended 2/28/2018 $24.33 9.86% 0.45% 0.45%(d) 0.88% 16% $1,488,143
Year Ended 2/28/2017 $23.83 34.40% 0.45% 0.45%(d) 0.85% 18% $1,638,983
Year Ended 2/29/2016 $19.05 (9.67%) 0.45% 0.45%(d) 0.99% 19% $1,131,160
Institutional Class
Year Ended 2/29/2020 $20.47 (7.85%) 0.20%(c) 0.20%(c),(d) 1.29% 17% $1,603,859
Year Ended 2/28/2019 $23.69 6.99% 0.20% 0.20%(d) 1.14% 22% $2,026,925
Year Ended 2/28/2018 $24.47 10.11% 0.20% 0.20%(d) 1.12% 16% $1,866,835
Year Ended 2/28/2017 $23.96 34.74% 0.20% 0.20%(d) 1.10% 18% $1,665,820
Year Ended 2/29/2016 $19.14 (9.44%) 0.20% 0.20%(d) 1.22% 19% $1,326,728
Institutional 2 Class
Year Ended 2/29/2020 $20.98 (7.87%) 0.20%(c) 0.20%(c) 1.29% 17% $638,046
Year Ended 2/28/2019 $24.25 7.01% 0.20% 0.20% 1.14% 22% $748,749
Year Ended 2/28/2018 $24.99 10.12% 0.20% 0.20% 1.12% 16% $584,472
Year Ended 2/28/2017 $24.43 34.73% 0.20% 0.20% 1.10% 18% $437,779
Year Ended 2/29/2016 $19.49 (9.46%) 0.20% 0.20% 1.24% 19% $208,441
Institutional 3 Class
Year Ended 2/29/2020 $19.91 (7.84%) 0.20%(c) 0.20%(c) 1.30% 17% $82,471
Year Ended 2/28/2019 $23.08 6.99% 0.20% 0.20% 1.16% 22% $70,934
Year Ended 2/28/2018(e) $23.90 8.14% 0.21% 0.20% 1.01% 16% $4,327
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Index Fund  | Annual Report 2020
27

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Small Cap Index Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Institutional Class, Institutional 2 Class and Institutional 3 Class shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities and exchange-traded funds are valued at the close of business of the New York Stock Exchange. Equity securities and exchange-traded funds are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
28 Columbia Small Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of transactions, at the mean of the latest quoted bid and ask prices.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
Columbia Small Cap Index Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Futures contracts
Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to maintain appropriate equity market exposure while keeping sufficient cash to accommodate daily redemptions. These instruments may be used for other purposes in future periods. Upon entering into futures contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.
Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
30 Columbia Small Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Equity risk Component of total distributable earnings (loss) — unrealized depreciation on futures contracts 86,815*
    
* Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin is reported in receivables or payables in the Statement of Assets and Liabilities.
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk 9,644
 
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category Futures
contracts
($)
Equity risk (7,296,645)
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average notional
amounts ($)*
Futures contracts — long 29,699,900
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Columbia Small Cap Index Fund  | Annual Report 2020
31

Notes to Financial Statements  (continued)
February 29, 2020
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to 0.20% of the Fund’s daily net assets.
32 Columbia Small Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The Investment Manager, from the management services fee it receives from the Fund, pays all operating expenses of the Fund, with the exception of brokerage fees and commissions, taxes, interest, fees and expenses of Board of Trustees who are not officers, directors or employees of the Investment Manager or its affiliates, distribution and/or shareholder servicing and any extraordinary non-recurring expenses that may arise, including litigation fees.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. A portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets. The expenses of the Chief Compliance Officer allocated to the Fund are payable by the Investment Manager.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent.
The transfer agency fees are payable by the Investment Manager. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund. The Transfer Agent also receives compensation from the Investment Manager for various shareholder services and reimbursements for certain out-of-pocket expenses.
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $1,700.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund.
Columbia Small Cap Index Fund  | Annual Report 2020
33

Notes to Financial Statements  (continued)
February 29, 2020
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  Fee rate(s) contractual
through
June 30, 2020
Class A 0.45%
Institutional Class 0.20
Institutional 2 Class 0.20
Institutional 3 Class 0.20
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, and re-characterization of distributions for investments. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The Fund did not have any permanent differences; therefore, no reclassifications were made.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
46,969,508 204,471,569 251,441,077 52,441,457 347,242,994 399,684,451
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
1,367,980 40,962,000 551,240,606
34 Columbia Small Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
2,813,020,691 1,072,210,133 (520,969,527) 551,240,606
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $651,010,694 and $1,146,510,032, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Borrower 3,828,571 2.55 7
Interest expense incurred by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at February 29, 2020.
Columbia Small Cap Index Fund  | Annual Report 2020
35

Notes to Financial Statements  (continued)
February 29, 2020
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting
36 Columbia Small Cap Index Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Passive investment risk
The Fund is not “actively” managed and may be affected by a general decline in market segments related to its underlying index. The Fund invests in securities or instruments included in, or believed by the Investment Manager to be representative of, its underlying index, regardless of their investment merits. The Fund does not seek temporary defensive positions when markets decline or appear overvalued. The decision of whether to remove a security from an index is made by an independent index provider who is not affiliated with the Fund or the Investment Manager.
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 16.7% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 17.6% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Small- and mid-cap company risk
Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies. Securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
Columbia Small Cap Index Fund  | Annual Report 2020
37

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Small Cap Index Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Small Cap Index Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
38 Columbia Small Cap Index Fund  | Annual Report 2020

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
92.19% 91.27% $160,521,263
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Columbia Small Cap Index Fund  | Annual Report 2020
39

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
40 Columbia Small Cap Index Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Small Cap Index Fund  | Annual Report 2020
41

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
42 Columbia Small Cap Index Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Small Cap Index Fund  | Annual Report 2020
43

Columbia Small Cap Index Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN228_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Small Cap Value Fund II
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Small Cap Value Fund II (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Small Cap Value Fund II  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks long-term capital appreciation.
Portfolio management
Christian Stadlinger, Ph.D., CFA
Co-Portfolio Manager
Managed Fund since 2002
Jarl Ginsberg, CFA, CAIA
Co-Portfolio Manager
Managed Fund since 2003
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 05/01/02 -11.58 2.19 8.53
  Including sales charges   -16.66 0.99 7.89
Advisor Class* 11/08/12 -11.34 2.44 8.72
Class C Excluding sales charges 05/01/02 -12.27 1.41 7.72
  Including sales charges   -13.12 1.41 7.72
Institutional Class 05/01/02 -11.36 2.44 8.81
Institutional 2 Class* 11/08/12 -11.26 2.58 8.83
Institutional 3 Class* 11/08/12 -11.23 2.64 8.88
Class R 01/23/06 -11.79 1.92 8.26
Russell 2000 Value Index   -9.29 3.61 8.67
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. Since the Fund launched more than one share class at its inception, Class A shares were used. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The Russell 2000 Value Index, an unmanaged index, tracks the performance of those Russell 2000 Index companies with lower price-to-book ratios and lower forecasted growth values.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Small Cap Value Fund II  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Small Cap Value Fund II during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 97.9
Money Market Funds 2.1
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 2.5
Consumer Discretionary 8.2
Consumer Staples 3.0
Energy 3.4
Financials 29.5
Health Care 5.9
Industrials 11.9
Information Technology 15.1
Materials 5.6
Real Estate 9.1
Utilities 5.8
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Small Cap Value Fund II  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned -11.58% excluding sales charges. The Fund lagged its benchmark, the Russell 2000 Value Index, which returned -9.29% for the same time period. Year-end volatility, related to the spread of the coronavirus and its potential impact on global economies, brought share prices of small-cap value stocks down sharply. Security selection within the financials, materials and real estate sectors figured into the Fund’s performance shortfall relative to the benchmark, much of which occurred during the first two weeks of September 2019, when smaller and more volatile names outperformed. The Fund has benefited over the longer term by avoiding these microcap names, even if it has meant giving up some upside in certain short term periods.
Global uncertainty curbed stock market gains, boosted bonds
Optimism prevailed early in 2019, buoyed by solid economic growth and a recovery from significant stock market losses in 2018. Strong job gains drove the unemployment rate down to 3.5%, annualized. Consumer spending and export trade supported U.S. economic growth. However, the pace of growth slowed to an estimated 2.1% for the year. In Europe, economic growth slowed as trade tensions and uncertainty mounted regarding Brexit (the U.K.’s departure from the European Union), which was finally resolved late in the period. At the same time, emerging markets came under pressure, driven by trade and tariff concerns. China’s economic conditions weakened and the spread of the coronavirus introduced enough global uncertainty to drive stock markets around the world down sharply in the final weeks of the period, raising concerns about the impact on global economic growth going forward.
Shares of large companies and growth-oriented companies weathered the year-end volatility better than small-cap value stocks. The S&P 500 Index returned 8.19% for the 12-month period, giving up substantial gains during the last few trading days of February. The Bloomberg Barclays U.S. Aggregate Bond Index gained 11.68%, as the yield on the 10-year U.S. Treasury fell to 1.10%. (Bond yields and prices move in opposite directions.)
Contributors and detractors
Strong stock selection within the information technology, communication services and health care sectors aided relative performance in this difficult year. Although sector weights are primarily a function of our bottom-up selection process, an overweight in the information technology sector and an underweight in the energy sector also aided relative returns.
Evoqua Water Technologies Corp., SYNNEX Corp. and Entegris, Inc. were top individual contributors to Fund performance. Shares of Evoqua, an industrial company that engages in water treatment solutions, climbed steadily higher during the 12-month period. After a disappointing 2018, the company reported quarterly results throughout 2019 that repeatedly beat expectations and showed increased predictability in earnings, increasing investor confidence. Shares of SYNNEX, which provides business-to-business technology solutions, rose after the company reported quarterly results during the period that beat expectations on both the top and bottom line and raised forward earnings guidance. Near the end of the period, the company announced that it would be spinning off one of its business lines into a new public company, a move that was well regarded by investors.
Shares of Entegris, which makes specialty materials for the semiconductor industry, rose over the summer despite earnings that were slightly below expectations, buoyed by management’s favorable outlook for its end markets. Investors also responded positively to the company’s acquisition of a specialty chemical company and an increased dividend. The Fund continued to own all three strong performers but trimmed exposure to Entegris.
Security selection within the financials, real estate, materials and utilities sectors, as well as an underweight in the real estate sector, detracted from relative results. Many of the period’s detractors were in the energy sector. Drilling service company Patterson-UTI Energy, Inc. and oil exploration and production company Callon Petroleum Co. were both hurt by the decline in oil prices during the period. Shares of children’s apparel company, Children’s Place, Inc., declined as higher competitor promotions and weaker mall traffic hurt earnings. However, we believe the acquisition of certain Gymboree assets as part of Gymboree’s bankruptcy agreement, has the potential to provide a tailwind going forward. Despite these disappointments, the Fund continued to own all three stocks at period’s end.
Columbia Small Cap Value Fund II  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
At period’s end
Regardless of the economic environment, we continue to focus on bottom-up stock selection. We look for undervalued companies with strong underlying earnings prospects that are exhibiting evidence of an upward inflection. In doing so, we believe we have the potential to avoid value traps and the potential to deliver attractive returns for our clients. As of the end of the period, the Fund was overweight in the information technology and materials sectors and underweight in the real estate and financials sectors.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Foreign investments subject the Fund to risks, including political, economic, market, social and others within a particular country, as well as to currency instabilities and less stringent financial and accounting standards generally applicable to U.S. issuers. Investments in small-cap companies involve risks and volatility greater than investments in larger, more established companies. Value securities may be unprofitable if the market fails to recognize their intrinsic worth or the portfolio manager misgauged that worth. The Fund may invest significantly in issuers within a particular sector, which may be negatively affected by market, economic or other conditions, making the Fund more vulnerable to unfavorable developments in the sector. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Small Cap Value Fund II  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 950.00 1,018.45 6.25 6.47 1.29
Advisor Class 1,000.00 1,000.00 951.30 1,019.69 5.05 5.22 1.04
Class C 1,000.00 1,000.00 946.20 1,014.72 9.87 10.22 2.04
Institutional Class 1,000.00 1,000.00 951.40 1,019.69 5.05 5.22 1.04
Institutional 2 Class 1,000.00 1,000.00 951.80 1,020.44 4.32 4.47 0.89
Institutional 3 Class 1,000.00 1,000.00 951.70 1,020.69 4.08 4.22 0.84
Class R 1,000.00 1,000.00 949.00 1,017.21 7.46 7.72 1.54
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Small Cap Value Fund II  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 97.1%
Issuer Shares Value ($)
Communication Services 2.4%
Diversified Telecommunication Services 0.9%
Vonage Holdings Corp.(a) 1,127,034 10,098,225
Media 1.5%
Nexstar Media Group, Inc., Class A 134,759 15,494,590
Total Communication Services 25,592,815
Consumer Discretionary 8.0%
Auto Components 0.9%
Visteon Corp.(a) 140,275 9,123,486
Hotels, Restaurants & Leisure 3.0%
Brinker International, Inc. 266,039 9,138,440
Dine Brands Global, Inc. 135,438 11,085,600
Penn National Gaming, Inc.(a) 243,014 7,185,924
PlayAGS, Inc.(a) 445,010 4,312,147
Total   31,722,111
Household Durables 2.1%
KB Home 334,725 10,908,688
TopBuild Corp.(a) 115,122 11,627,322
Total   22,536,010
Specialty Retail 2.0%
Aaron’s, Inc. 102,000 4,011,660
Children’s Place, Inc. (The) 97,709 5,628,039
Genesco, Inc.(a) 197,393 6,792,293
Sally Beauty Holdings, Inc.(a) 338,594 4,212,109
Total   20,644,101
Total Consumer Discretionary 84,025,708
Consumer Staples 3.0%
Food & Staples Retailing 1.0%
BJ’s Wholesale Club Holdings, Inc.(a) 512,728 9,875,141
Food Products 0.9%
TreeHouse Foods, Inc.(a) 246,690 9,401,356
Personal Products 1.1%
BellRing Brands, Inc., Class A(a) 599,795 11,785,972
Total Consumer Staples 31,062,469
Common Stocks (continued)
Issuer Shares Value ($)
Energy 3.3%
Energy Equipment & Services 0.5%
Patterson-UTI Energy, Inc. 916,139 5,249,476
Oil, Gas & Consumable Fuels 2.8%
Callon Petroleum Co.(a) 1,637,150 3,716,330
Delek U.S. Holdings, Inc. 324,083 6,928,894
Matador Resources Co.(a) 314,409 3,030,903
Oasis Petroleum, Inc.(a) 2,157,327 3,527,230
Scorpio Tankers, Inc. 414,106 8,191,017
SM Energy Co. 580,447 3,813,537
Total   29,207,911
Total Energy 34,457,387
Financials 28.6%
Banks 17.3%
Ameris Bancorp 352,828 12,059,661
Atlantic Union Bankshares Corp. 503,054 14,960,826
Bancorp, Inc. (The)(a) 551,308 6,709,418
Cathay General Bancorp 424,347 13,061,401
Community Bank System, Inc. 309,572 18,825,073
Hancock Whitney Corp. 377,291 12,639,249
Heritage Commerce Corp. 580,447 5,955,386
Heritage Financial Corp. 376,668 8,734,931
Independent Bank Corp. 231,404 15,626,712
Pacific Premier Bancorp, Inc. 445,010 11,494,608
Renasant Corp. 428,562 12,141,162
Sandy Spring Bancorp, Inc. 457,722 14,079,529
TCF Financial Corp. 445,010 16,216,164
Triumph Bancorp, Inc.(a) 170,000 5,757,900
UMB Financial Corp. 236,491 13,751,952
Total   182,013,972
Capital Markets 1.6%
Houlihan Lokey, Inc. 324,221 16,606,600
Consumer Finance 0.7%
SLM Corp. 754,581 7,825,005
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Small Cap Value Fund II  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Insurance 3.2%
American Equity Investment Life Holding Co. 242,461 6,129,414
AMERISAFE, Inc. 224,094 14,604,206
Argo Group International Holdings Ltd. 226,375 12,735,857
Total   33,469,477
Mortgage Real Estate Investment Trusts (REITS) 1.5%
Blackstone Mortgage Trust, Inc. 306,006 11,034,576
Invesco Mortgage Capital, Inc. 286,077 4,600,118
Total   15,634,694
Thrifts & Mortgage Finance 4.3%
Axos Financial, Inc.(a) 390,972 9,739,113
MGIC Investment Corp. 1,247,961 15,012,971
OceanFirst Financial Corp. 351,589 7,186,479
WSFS Financial Corp. 376,668 12,979,979
Total   44,918,542
Total Financials 300,468,290
Health Care 5.7%
Biotechnology 0.5%
Immunomedics, Inc.(a) 333,757 5,340,112
Health Care Equipment & Supplies 0.6%
Merit Medical Systems, Inc.(a) 176,069 6,340,244
Health Care Providers & Services 2.5%
LHC Group, Inc.(a) 116,090 14,100,292
R1 RCM, Inc.(a) 967,412 11,879,819
Total   25,980,111
Life Sciences Tools & Services 1.3%
Syneos Health, Inc.(a) 211,000 13,366,850
Pharmaceuticals 0.8%
Horizon Therapeutics PLC(a) 251,527 8,607,254
Total Health Care 59,634,571
Industrials 11.6%
Airlines 1.5%
Skywest, Inc. 257,469 11,689,093
Spirit Airlines, Inc.(a) 135,000 3,840,750
Total   15,529,843
Building Products 0.7%
Masonite International Corp.(a) 94,420 6,939,870
Common Stocks (continued)
Issuer Shares Value ($)
Construction & Engineering 1.1%
MasTec, Inc.(a) 227,342 11,157,945
Electrical Equipment 1.8%
Bloom Energy Corp., Class A(a) 790,000 7,165,300
Sunrun, Inc.(a) 609,000 11,778,060
Total   18,943,360
Machinery 1.5%
Evoqua Water Technologies Corp.(a) 662,677 13,896,337
Navistar International Corp.(a) 56,279 2,043,490
Total   15,939,827
Professional Services 2.9%
ICF International, Inc. 185,950 14,128,481
Kforce, Inc. 326,127 9,933,828
Korn/Ferry International 198,320 6,937,234
Total   30,999,543
Road & Rail 0.5%
Hertz Global Holdings, Inc.(a) 410,000 5,243,900
Trading Companies & Distributors 1.6%
NOW, Inc.(a) 749,744 6,620,240
Triton International Ltd. 285,387 9,808,751
Total   16,428,991
Total Industrials 121,183,279
Information Technology 14.7%
Communications Equipment 2.8%
Ciena Corp.(a) 244,000 9,381,800
Lumentum Holdings, Inc.(a) 129,000 10,038,780
Viavi Solutions, Inc.(a) 734,340 9,685,945
Total   29,106,525
Electronic Equipment, Instruments & Components 1.4%
SYNNEX Corp. 113,188 14,151,896
IT Services 2.3%
KBR, Inc. 476,795 12,377,598
Science Applications International Corp. 150,917 12,092,979
Total   24,470,577
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Semiconductors & Semiconductor Equipment 5.7%
Cohu, Inc. 561,099 11,485,696
Diodes, Inc.(a) 138,050 6,075,580
Entegris, Inc. 183,000 9,757,560
Kulicke & Soffa Industries, Inc. 372,454 8,503,125
MACOM Technology Solutions Holdings, Inc.(a) 353,106 8,922,989
Photronics, Inc.(a) 599,602 7,465,045
Ultra Clean Holdings, Inc.(a) 366,338 7,660,128
Total   59,870,123
Software 2.5%
Avaya Holdings Corp.(a) 851,322 11,033,133
Cerence, Inc.(a) 149,000 3,234,790
Verint Systems, Inc.(a) 222,505 12,211,074
Total   26,478,997
Total Information Technology 154,078,118
Materials 5.4%
Chemicals 1.3%
Livent Corp.(a) 662,677 5,917,705
Orion Engineered Carbons SA 580,447 8,248,152
Total   14,165,857
Construction Materials 1.0%
Summit Materials, Inc., Class A(a) 532,077 10,396,785
Metals & Mining 2.3%
Carpenter Technology Corp. 245,702 9,029,549
Cleveland-Cliffs, Inc. 1,018,975 5,920,245
Materion Corp. 201,222 9,123,405
Total   24,073,199
Paper & Forest Products 0.8%
Boise Cascade Co. 228,309 8,100,403
Total Materials 56,736,244
Real Estate 8.8%
Equity Real Estate Investment Trusts (REITS) 8.8%
American Assets Trust, Inc. 268,304 11,121,201
First Industrial Realty Trust, Inc. 503,054 19,367,579
Hannon Armstrong Sustainable Infrastructure Capital, Inc. 210,025 7,130,349
Hudson Pacific Properties, Inc. 234,570 7,571,918
Common Stocks (continued)
Issuer Shares Value ($)
Investors Real Estate Trust 110,000 7,749,500
Mack-Cali Realty Corp. 640,000 12,147,200
PS Business Parks, Inc. 94,807 14,083,580
Sabra Health Care REIT, Inc. 325,000 6,353,750
Sunstone Hotel Investors, Inc. 655,000 7,172,250
Total   92,697,327
Total Real Estate 92,697,327
Utilities 5.6%
Electric Utilities 2.3%
PNM Resources, Inc. 242,784 11,430,271
Portland General Electric Co. 237,016 12,896,040
Total   24,326,311
Gas Utilities 3.3%
New Jersey Resources Corp. 261,201 9,223,007
ONE Gas, Inc. 140,275 11,522,189
South Jersey Industries, Inc. 328,920 8,897,286
Southwest Gas Holdings, Inc. 73,911 4,780,564
Total   34,423,046
Total Utilities 58,749,357
Total Common Stocks
(Cost $899,017,628)
1,018,685,565
Money Market Funds 2.1%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(b),(c) 22,340,097 22,340,097
Total Money Market Funds
(Cost $22,339,975)
22,340,097
Total Investments in Securities
(Cost: $921,357,603)
1,041,025,662
Other Assets & Liabilities, Net   8,643,378
Net Assets 1,049,669,040
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Small Cap Value Fund II  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) The rate shown is the seven-day current annualized yield at February 29, 2020.
(c) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  15,754,613 313,944,069 (307,358,585) 22,340,097 4,779 122 698,303 22,340,097
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 25,592,815 25,592,815
Consumer Discretionary 84,025,708 84,025,708
Consumer Staples 31,062,469 31,062,469
Energy 34,457,387 34,457,387
Financials 300,468,290 300,468,290
Health Care 59,634,571 59,634,571
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
11

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Industrials 121,183,279 121,183,279
Information Technology 154,078,118 154,078,118
Materials 56,736,244 56,736,244
Real Estate 92,697,327 92,697,327
Utilities 58,749,357 58,749,357
Total Common Stocks 1,018,685,565 1,018,685,565
Money Market Funds 22,340,097 22,340,097
Total Investments in Securities 1,041,025,662 1,041,025,662
See the Portfolio of Investments for all investment classifications not indicated in the table.
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Small Cap Value Fund II  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $899,017,628) $1,018,685,565
Affiliated issuers (cost $22,339,975) 22,340,097
Receivable for:  
Investments sold 14,483,498
Capital shares sold 2,027,213
Dividends 680,172
Expense reimbursement due from Investment Manager 1,034
Prepaid expenses 2,866
Total assets 1,058,220,445
Liabilities  
Payable for:  
Investments purchased 4,411,625
Capital shares purchased 3,691,740
Management services fees 24,591
Distribution and/or service fees 767
Transfer agent fees 195,522
Compensation of board members 146,455
Compensation of chief compliance officer 14
Other expenses 80,691
Total liabilities 8,551,405
Net assets applicable to outstanding capital stock $1,049,669,040
Represented by  
Paid in capital 926,759,654
Total distributable earnings (loss) 122,909,386
Total - representing net assets applicable to outstanding capital stock $1,049,669,040
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
13

Statement of Assets and Liabilities  (continued)
February 29, 2020
Class A  
Net assets $99,355,933
Shares outstanding 7,709,113
Net asset value per share $12.89
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $13.68
Advisor Class  
Net assets $57,399,510
Shares outstanding 4,265,571
Net asset value per share $13.46
Class C  
Net assets $314,553
Shares outstanding 28,602
Net asset value per share $11.00
Institutional Class  
Net assets $350,469,431
Shares outstanding 26,715,496
Net asset value per share $13.12
Institutional 2 Class  
Net assets $144,260,256
Shares outstanding 10,699,132
Net asset value per share $13.48
Institutional 3 Class  
Net assets $393,073,806
Shares outstanding 29,042,715
Net asset value per share $13.53
Class R  
Net assets $4,795,551
Shares outstanding 379,966
Net asset value per share $12.62
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Small Cap Value Fund II  | Annual Report 2020

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $21,154,878
Dividends — affiliated issuers 698,303
Interfund lending 196
Foreign taxes withheld (63,450)
Total income 21,789,927
Expenses:  
Management services fees 10,746,861
Distribution and/or service fees  
Class A 323,344
Class C 4,406
Class R 28,313
Transfer agent fees  
Class A 322,505
Advisor Class 189,704
Class C 1,099
Institutional Class 1,195,637
Institutional 2 Class 80,506
Institutional 3 Class 38,779
Class R 14,107
Compensation of board members 45,201
Custodian fees 11,754
Printing and postage fees 135,738
Registration fees 117,059
Audit fees 32,738
Legal fees 19,547
Compensation of chief compliance officer 277
Other 28,036
Total expenses 13,335,611
Fees waived or expenses reimbursed by Investment Manager and its affiliates (690,475)
Fees waived by transfer agent  
Institutional 2 Class (9,320)
Institutional 3 Class (26,236)
Expense reduction (40)
Total net expenses 12,609,540
Net investment income 9,180,387
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 36,402,934
Investments — affiliated issuers 4,779
Net realized gain 36,407,713
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (180,738,508)
Investments — affiliated issuers 122
Net change in unrealized appreciation (depreciation) (180,738,386)
Net realized and unrealized loss (144,330,673)
Net decrease in net assets resulting from operations $(135,150,286)
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
15

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $9,180,387 $6,894,195
Net realized gain 36,407,713 158,223,581
Net change in unrealized appreciation (depreciation) (180,738,386) (164,833,875)
Net increase (decrease) in net assets resulting from operations (135,150,286) 283,901
Distributions to shareholders    
Net investment income and net realized gains    
Class A (4,629,633) (17,596,407)
Advisor Class (2,829,163) (7,879,792)
Class C (14,654) (300,544)
Institutional Class (18,063,603) (70,660,938)
Institutional 2 Class (5,168,504) (12,427,431)
Institutional 3 Class (17,932,579) (56,205,124)
Class R (193,575) (864,604)
Total distributions to shareholders (48,831,711) (165,934,840)
Increase (decrease) in net assets from capital stock activity (154,699,888) 16,604,536
Total decrease in net assets (338,681,885) (149,046,403)
Net assets at beginning of year 1,388,350,925 1,537,397,328
Net assets at end of year $1,049,669,040 $1,388,350,925
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Small Cap Value Fund II  | Annual Report 2020

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 1,128,509 16,444,144 1,331,515 22,116,175
Distributions reinvested 302,813 4,394,997 1,103,156 16,608,769
Redemptions (3,263,115) (47,746,037) (2,559,206) (42,125,435)
Net decrease (1,831,793) (26,906,896) (124,535) (3,400,491)
Advisor Class        
Subscriptions 1,364,084 20,859,626 2,606,896 39,029,354
Distributions reinvested 166,033 2,514,893 433,584 6,788,417
Redemptions (2,723,530) (40,250,402) (1,604,189) (25,365,268)
Net increase (decrease) (1,193,413) (16,875,883) 1,436,291 20,452,503
Class C        
Subscriptions 9,012 112,200 3,709 57,670
Distributions reinvested 1,135 14,077 20,220 294,553
Redemptions (28,744) (357,291) (493,683) (7,628,683)
Net decrease (18,597) (231,014) (469,754) (7,276,460)
Institutional Class        
Subscriptions 3,109,684 46,141,517 8,443,028 144,567,967
Distributions reinvested 1,027,977 15,180,360 3,881,352 59,496,740
Redemptions (12,918,930) (193,587,184) (18,696,763) (316,199,177)
Net decrease (8,781,269) (132,265,307) (6,372,383) (112,134,470)
Institutional 2 Class        
Subscriptions 5,180,994 79,089,210 4,194,743 73,022,362
Distributions reinvested 340,860 5,167,220 805,098 12,427,168
Redemptions (2,341,608) (35,677,107) (1,894,410) (33,103,868)
Net increase 3,180,246 48,579,323 3,105,431 52,345,662
Institutional 3 Class        
Subscriptions 7,724,688 118,282,901 8,040,754 141,437,234
Distributions reinvested 1,031,813 15,703,907 3,004,316 47,178,276
Redemptions (10,480,149) (160,516,189) (7,105,243) (120,780,201)
Net increase (decrease) (1,723,648) (26,529,381) 3,939,827 67,835,309
Class R        
Subscriptions 45,723 653,463 132,413 2,218,597
Distributions reinvested 13,615 193,575 56,605 838,813
Redemptions (91,649) (1,317,768) (269,677) (4,274,927)
Net decrease (32,311) (470,730) (80,659) (1,217,517)
Total net increase (decrease) (10,400,785) (154,699,888) 1,434,218 16,604,536
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
17

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $15.11 0.06 (1.76) (1.70) (0.09) (0.43) (0.52)
Year Ended 2/28/2019 $17.11 0.03 (0.10) (0.07) (0.01) (1.92) (1.93)
Year Ended 2/28/2018 $18.01 0.01 0.75 0.76 (0.01) (1.65) (1.66)
Year Ended 2/28/2017 $14.07 0.01 4.85 4.86 (0.03) (0.89) (0.92)
Year Ended 2/29/2016 $17.60 0.02 (1.65) (1.63) (1.90) (1.90)
Advisor Class
Year Ended 2/29/2020 $15.75 0.10 (1.83) (1.73) (0.13) (0.43) (0.56)
Year Ended 2/28/2019 $17.75 0.07 (0.11) (0.04) (0.04) (1.92) (1.96)
Year Ended 2/28/2018 $18.61 0.05 0.79 0.84 (0.05) (1.65) (1.70)
Year Ended 2/28/2017 $14.52 0.05 5.00 5.05 (0.07) (0.89) (0.96)
Year Ended 2/29/2016 $18.08 0.07 (1.70) (1.63) (0.03) (1.90) (1.93)
Class C
Year Ended 2/29/2020 $12.96 (0.04) (1.51) (1.55) (0.41) (0.41)
Year Ended 2/28/2019 $15.06 (0.11) (0.07) (0.18) (1.92) (1.92)
Year Ended 2/28/2018 $16.13 (0.11) 0.68 0.57 (1.64) (1.64)
Year Ended 2/28/2017 $12.75 (0.10) 4.37 4.27 (0.00)(d) (0.89) (0.89)
Year Ended 2/29/2016 $16.25 (0.09) (1.51) (1.60) (1.90) (1.90)
Institutional Class
Year Ended 2/29/2020 $15.37 0.10 (1.79) (1.69) (0.13) (0.43) (0.56)
Year Ended 2/28/2019 $17.37 0.07 (0.11) (0.04) (0.04) (1.92) (1.96)
Year Ended 2/28/2018 $18.25 0.05 0.77 0.82 (0.05) (1.65) (1.70)
Year Ended 2/28/2017 $14.25 0.05 4.91 4.96 (0.07) (0.89) (0.96)
Year Ended 2/29/2016 $17.78 0.07 (1.67) (1.60) (0.03) (1.90) (1.93)
Institutional 2 Class
Year Ended 2/29/2020 $15.78 0.12 (1.84) (1.72) (0.15) (0.43) (0.58)
Year Ended 2/28/2019 $17.78 0.10 (0.11) (0.01) (0.07) (1.92) (1.99)
Year Ended 2/28/2018 $18.63 0.08 0.79 0.87 (0.07) (1.65) (1.72)
Year Ended 2/28/2017 $14.53 0.07 5.01 5.08 (0.09) (0.89) (0.98)
Year Ended 2/29/2016 $18.09 0.10 (1.71) (1.61) (0.05) (1.90) (1.95)
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Small Cap Value Fund II  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $12.89 (11.58%) 1.36% 1.28%(c) 0.40% 27% $99,356
Year Ended 2/28/2019 $15.11 (0.15%) 1.35% 1.27%(c) 0.17% 38% $144,155
Year Ended 2/28/2018 $17.11 4.45% 1.33% 1.29%(c) 0.04% 45% $165,419
Year Ended 2/28/2017 $18.01 34.98% 1.30% 1.30%(c) 0.06% 58% $201,649
Year Ended 2/29/2016 $14.07 (10.48%) 1.30% 1.30%(c) 0.15% 57% $197,263
Advisor Class
Year Ended 2/29/2020 $13.46 (11.34%) 1.11% 1.03%(c) 0.64% 27% $57,400
Year Ended 2/28/2019 $15.75 0.09% 1.10% 1.02%(c) 0.42% 38% $85,978
Year Ended 2/28/2018 $17.75 4.73% 1.08% 1.04%(c) 0.30% 45% $71,415
Year Ended 2/28/2017 $18.61 35.21% 1.05% 1.05%(c) 0.28% 58% $69,709
Year Ended 2/29/2016 $14.52 (10.22%) 1.05% 1.05%(c) 0.41% 57% $26,487
Class C
Year Ended 2/29/2020 $11.00 (12.27%) 2.11% 2.03%(c) (0.33%) 27% $315
Year Ended 2/28/2019 $12.96 (0.93%) 2.09% 2.02%(c) (0.71%) 38% $611
Year Ended 2/28/2018 $15.06 3.72% 2.07% 2.04%(c) (0.72%) 45% $7,785
Year Ended 2/28/2017 $16.13 33.93% 2.04% 2.04%(c) (0.70%) 58% $11,926
Year Ended 2/29/2016 $12.75 (11.18%) 2.05% 2.05%(c) (0.60%) 57% $11,325
Institutional Class
Year Ended 2/29/2020 $13.12 (11.36%) 1.11% 1.03%(c) 0.66% 27% $350,469
Year Ended 2/28/2019 $15.37 0.09% 1.10% 1.02%(c) 0.42% 38% $545,568
Year Ended 2/28/2018 $17.37 4.71% 1.07% 1.04%(c) 0.28% 45% $727,418
Year Ended 2/28/2017 $18.25 35.26% 1.05% 1.05%(c) 0.31% 58% $1,098,979
Year Ended 2/29/2016 $14.25 (10.22%) 1.05% 1.05%(c) 0.40% 57% $1,007,843
Institutional 2 Class
Year Ended 2/29/2020 $13.48 (11.26%) 0.92% 0.89% 0.79% 27% $144,260
Year Ended 2/28/2019 $15.78 0.22% 0.91% 0.88% 0.60% 38% $118,654
Year Ended 2/28/2018 $17.78 4.90% 0.90% 0.89% 0.44% 45% $78,479
Year Ended 2/28/2017 $18.63 35.42% 0.90% 0.90% 0.39% 58% $78,330
Year Ended 2/29/2016 $14.53 (10.10%) 0.89% 0.89% 0.59% 57% $19,298
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
19

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Institutional 3 Class
Year Ended 2/29/2020 $15.84 0.13 (1.85) (1.72) (0.16) (0.43) (0.59)
Year Ended 2/28/2019 $17.84 0.11 (0.12) (0.01) (0.07) (1.92) (1.99)
Year Ended 2/28/2018 $18.68 0.09 0.80 0.89 (0.08) (1.65) (1.73)
Year Ended 2/28/2017 $14.56 0.08 5.03 5.11 (0.10) (0.89) (0.99)
Year Ended 2/29/2016 $18.12 0.11 (1.71) (1.60) (0.06) (1.90) (1.96)
Class R
Year Ended 2/29/2020 $14.80 0.02 (1.71) (1.69) (0.06) (0.43) (0.49)
Year Ended 2/28/2019 $16.84 (0.01) (0.11) (0.12) (1.92) (1.92)
Year Ended 2/28/2018 $17.77 (0.04) 0.75 0.71 (1.64) (1.64)
Year Ended 2/28/2017 $13.91 (0.03) 4.79 4.76 (0.01) (0.89) (0.90)
Year Ended 2/29/2016 $17.47 (0.02) (1.64) (1.66) (1.90) (1.90)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) The benefits derived from expense reductions had an impact of less than 0.01%.
(d) Rounds to zero.
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Small Cap Value Fund II  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Institutional 3 Class
Year Ended 2/29/2020 $13.53 (11.23%) 0.87% 0.84% 0.84% 27% $393,074
Year Ended 2/28/2019 $15.84 0.27% 0.85% 0.83% 0.62% 38% $487,282
Year Ended 2/28/2018 $17.84 4.98% 0.86% 0.84% 0.52% 45% $478,580
Year Ended 2/28/2017 $18.68 35.55% 0.84% 0.84% 0.50% 58% $203,778
Year Ended 2/29/2016 $14.56 (10.05%) 0.84% 0.84% 0.62% 57% $133,139
Class R
Year Ended 2/29/2020 $12.62 (11.79%) 1.61% 1.53%(c) 0.15% 27% $4,796
Year Ended 2/28/2019 $14.80 (0.46%) 1.60% 1.52%(c) (0.08%) 38% $6,104
Year Ended 2/28/2018 $16.84 4.19% 1.58% 1.54%(c) (0.21%) 45% $8,302
Year Ended 2/28/2017 $17.77 34.67% 1.55% 1.55%(c) (0.19%) 58% $11,042
Year Ended 2/29/2016 $13.91 (10.73%) 1.55% 1.55%(c) (0.10%) 57% $10,109
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Small Cap Value Fund II  | Annual Report 2020
21

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Small Cap Value Fund II (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
22 Columbia Small Cap Value Fund II  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Columbia Small Cap Value Fund II  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.87% to 0.75% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.83% of the Fund’s average daily net assets.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
24 Columbia Small Cap Value Fund II  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class. In addition, effective July 1, 2019 through June 30, 2020, Institutional 2 Class shares are subject to a contractual transfer agency fee annual limitation of not more than 0.05% and Institutional 3 Class shares are subject to a contractual transfer agency fee annual limitation of not more than 0.00% of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.25
Advisor Class 0.25
Class C 0.25
Institutional Class 0.25
Institutional 2 Class 0.05
Institutional 3 Class 0.00
Class R 0.25
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $40.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Columbia Small Cap Value Fund II  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 17,739
Class C 1.00(b)
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 1.29% 1.27%
Advisor Class 1.04 1.02
Class C 2.04 2.02
Institutional Class 1.04 1.02
Institutional 2 Class 0.89 0.88
Institutional 3 Class 0.84 0.83
Class R 1.54 1.52
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Reflected in the contractual cap commitment, effective July 1, 2019 through June 30, 2020, is the Transfer Agent’s contractual agreement to limit total transfer agency fees to an annual rate of not more than 0.05% for Institutional 2 Class and 0.00% for Institutional 3 Class of the average daily net assets attributable to each share class, unless sooner terminated at the sole discretion of the Board of Trustees. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
26 Columbia Small Cap Value Fund II  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, distribution reclassifications, earnings and profits distributed to shareholders on the redemption of shares, and redemption in kind. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Excess of distributions
over net investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
2,042,109 (16,299,524) 14,257,415
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
11,239,368 37,592,343 48,831,711 4,506,412 161,428,428 165,934,840
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
4,401,262 118,652,746
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
922,372,916 240,988,074 (122,335,328) 118,652,746
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $343,230,587 and $543,604,715, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Columbia Small Cap Value Fund II  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
Note 6. Redemption-in-kind
Proceeds from the sales of securities for Columbia Small Cap Value Fund II include the value of securities delivered through in-kind redemptions of certain fund shares. During the year ended February 29, 2020, securities and other assets with a value of $60,606,626 were distributed to shareholders to satisfy their redemption requests. The net realized gain on these securities was $13,223,752, which is not taxable to remaining shareholders in the Fund.
Note 7. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 8. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Lender 650,000 2.57 4
Interest income earned by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at February 29, 2020.
Note 9. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
28 Columbia Small Cap Value Fund II  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Note 10. Significant risks
Financial sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the financial services sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the financial services sector are subject to certain risks, including the risk of regulatory change, decreased liquidity in credit markets and unstable interest rates. Such companies may have concentrated portfolios, such as a high level of loans to real estate developers, which makes them vulnerable to economic conditions that affect that industry. Performance of such companies may be affected by competitive pressures and exposure to investments or agreements that, under certain circumstances, may lead to losses (e.g., subprime loans). Companies in the financial services sector are subject to extensive governmental regulation that may limit the amount and types of loans and other financial commitments they can make, and interest rates and fees that they may charge. In addition, profitability of such companies is largely dependent upon the availability and the cost of capital.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Columbia Small Cap Value Fund II  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
Shareholder concentration risk
At February 29, 2020, two unaffiliated shareholders of record owned 42.1% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Small- and mid-cap company risk
Investments in small- and mid-capitalization companies (small- and mid-cap companies) often involve greater risks than investments in larger, more established companies (larger companies) because small- and mid-cap companies tend to have less predictable earnings and may lack the management experience, financial resources, product diversification and competitive strengths of larger companies. Securities of small- and mid-cap companies may be less liquid and more volatile than the securities of larger companies.
Note 11. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 12. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
30 Columbia Small Cap Value Fund II  | Annual Report 2020

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Small Cap Value Fund II
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Small Cap Value Fund II (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the five years in the period ended February 29, 2020 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the five years in the period ended February 29, 2020 in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
Columbia Small Cap Value Fund II  | Annual Report 2020
31

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
100.00% 100.00% $19,873,438
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
32 Columbia Small Cap Value Fund II  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
Columbia Small Cap Value Fund II  | Annual Report 2020
33

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
34 Columbia Small Cap Value Fund II  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
Columbia Small Cap Value Fund II  | Annual Report 2020
35

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
36 Columbia Small Cap Value Fund II  | Annual Report 2020

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Columbia Small Cap Value Fund II
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN230_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Select International Equity Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Select International Equity Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Select International Equity Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks long-term capital growth.
Portfolio management
Threadneedle International Limited
Simon Haines, CFA
William Davies
David Dudding, CFA
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 06/03/92 4.49 1.99 4.06
  Including sales charges   -1.52 0.78 3.45
Advisor Class* 11/08/12 4.75 2.23 4.32
Class C Excluding sales charges 06/17/92 3.67 1.22 3.28
  Including sales charges   2.67 1.22 3.28
Institutional Class 12/02/91 4.71 2.22 4.32
Institutional 2 Class* 11/08/12 4.92 2.40 4.44
Institutional 3 Class* 03/07/11 5.01 2.45 4.52
Class R 01/23/06 4.26 1.72 3.81
MSCI EAFE Index (Net)   -0.57 1.96 4.83
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
The Fund’s performance prior to May 2015 reflects returns achieved pursuant to different principal investment strategies. If the Fund’s current strategies had been in place for the prior periods, results shown may have been different.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The MSCI EAFE Index (Net) is a free float-adjusted market capitalization index that is designed to measure the equity market performance of developed markets, excluding the U.S. and Canada. The index is compiled from a composite of securities markets of Europe, Australasia and the Far East and is widely recognized by investors in foreign markets as the measurement index for portfolios of non-North American securities.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes (except the MSCI EAFE Index (Net), which reflects reinvested dividends net of withholding taxes) or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Select International Equity Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Select International Equity Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 6.3
Consumer Discretionary 12.0
Consumer Staples 7.8
Energy 5.0
Financials 15.8
Health Care 15.7
Industrials 18.8
Information Technology 9.7
Materials 7.4
Utilities 1.5
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
Country breakdown (%) (at February 29, 2020)
Australia 3.2
Canada 2.0
China 0.0(a)
Denmark 4.2
France 9.8
Germany 4.2
Hong Kong 1.3
India 1.1
Indonesia 1.7
Ireland 3.6
Japan 29.4
Malta 0.0(a)
Netherlands 4.8
Singapore 1.4
South Korea 0.9
Spain 1.1
Sweden 1.6
Switzerland 10.6
United Kingdom 14.7
United States(b) 4.4
Total 100.0
    
(a) Rounds to zero.
(b) Includes investments in Money Market Funds.
Country breakdown is based primarily on issuer’s place of organization/incorporation. Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
 
4 Columbia Select International Equity Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, Class A shares of the Fund returned 4.49% excluding sales charges, outperforming the Fund’s benchmark, the MSCI EAFE Index (Net), which returned -0.57%. The Fund benefited from security selection at both the regional and sector levels, with strongest contributions coming from positions in the health care and materials sectors.
A strong market in 2019, but a reversal in 2020
Global stock market performance was generally strong through 2019, as markets were supported by the Federal Reserve’s dovish policy shift, Chinese economic stimulus measures, and reduced concern about trade tensions with the U.S. and China signing an interim deal. However, the benchmark reversed its gains in the first two months of 2020, as a newly discovered coronavirus spread throughout China and beyond, sparking concern that the outbreak might weigh on an already slowing global economy. Central banks and governments across the world pledged to implement supportive measures, which have subsequently materialized.
Europe ex-U.K. stocks outperformed, despite concerns over the region’s political and economic backdrop. Stocks were supported by relatively undemanding valuations and the European Central Bank’s (ECB’s) stimulus measures to spur growth in the autumn of 2019. These included lowering interest rates further into negative territory, restarting its bond-purchase program, and outlining more generous terms for long-term cheap financing for banks. The U.K. market trailed the benchmark markedly. Brexit-related uncertainty and fears of a hard-left government hobbled U.K. shares for much of the review period but eased in December as the ruling Conservatives decisively won a snap general election and legislators approved a Brexit deal.
Japanese stocks outperformed in dollar terms, though the return was inflated by currency moves. The Japanese market had a volatile 2019, driven by U.S.-China trade tensions and periods of attendant yen strength. Japanese stocks staged a rebound in the final months of 2019, reflecting optimism about the U.S.-China trade deal and news of Japan’s first fiscal stimulus since 2016. Markets fell in 2020 however, amid concerns about slowing exports – a key driver of Japan’s GDP – in the wake of the coronavirus, and evidence that the consumption-tax hike in October had impacted Japanese growth more negatively than anticipated after citizens increased their spending before the tax increase went into effect.
In the Far East, Australian markets fared well, hitting record highs in January 2020 following the signing of the U.S.-China trade deal despite worries about the economic fallout from bushfires which swept the country. Gains were later eroded in the coronavirus-induced sell-off and the similtaneous slump in commodity prices. Hong Kong equities struggled amid concerns about widespread street protests, slowing growth in the region and the economic toll of the coronavirus. However, stocks outperformed towards the end of the period on optimism over China’s stimulus measures in response to the epidemic.
At the sector level, the relatively defensive utilities and health care sectors led gains as investors favored their stable growth profiles. Technology also performed well, owing to strong earnings from sector heavyweights, the U.S.-China trade deal and a more favorable outlook for smartphone and 5G demand. Energy stocks lagged most, mirroring the decline in crude oil prices on concerns about the hit to demand from trade tensions and, later, the coronavirus. These worries also weighed on prices of industrial commodities, which resulted in the materials sector struggling over the year.
Contributors and detractors
The Fund’s outperformance was driven by security selection at both the regional and sector levels. In terms of the latter, the strongest contributions came from health care, materials and industrials. By sector, the positive effects from our relative overweights in health care and technology were offset by our overweight in energy and underweight in utilities. In health care, CSL Ltd., Hoya Corp. and Roche Holding AG were notable contributors. Specialty biotechnology company CSL contributed based on optimism around prospects for its plasma product’s revenue growth. Japanese optical-product maker Hoya performed strongly on a string of impressive results. Healthy growth and positive outlooks for its life-care business and its information and technology segment buoyed sentiment, as did the announcement of a larger-than-expected share-buyback program. ASML Holding NV, a developer of semiconductor manufacturing equipment, also outperformed, helped by optimism around its efforts in 5G, its leading market position, and the rising barriers to entry in its industry. The strong contribution of materials was also a function of security selection, driven by the holdings in Sika AG and CRH PLC. Industrials also contributed, driven by Nihon M&A Center, Inc., Ferguson PLC and Daikin Industries Ltd.
Columbia Select International Equity Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
The energy, financials and consumer staples sectors were the largest detractors in relative terms. Our overweight to energy detracted, in no small measure due to pressure on oil prices and worries about global demand. Financials also weighed slightly on returns, with the detraction split between selection and allocation effects. Our underweight to consumer staples also detracted, as the sector held up relatively well amid a flight to more defensive stocks.
Among holdings, the three largest detractors over the review period were TechnipFMC PLC, Nestlé SA and ING Groep NV. Oil and gas business TechnipFMC was the weakest holding, falling with the rest of the energy sector. Global oil prices finished the reporting period on a volatile note, driven by concerns about the global coronavirus outbreak and its impact on demand. That said, given the company’s leadership in both the subsea and liquefied natural gas (LNG) segments, a strong balance sheet and growing free cash flow, we feel that the competitive moat is sustainable and should benefit market share. Nestlé was a new holding during the period, but the stock came under pressure soon after our purchase as some concerns around pricing were expressed by investors. The stock held up well thereafter, buoyed by its stable growth profile. Global financial institution ING lagged against the backdrop of monetary easing by central banks. Despite a weaker interest-rate environment, we view ING positively for its portfolio, which is well diversified by geography as well as by lending type.
Portfolio positioning
The biggest increases in relative weights over the period were to Japan, Switzerland and Denmark. In Japan, the Fund’s weighting was broadly in line with the benchmark at the start of the year, but by the end of the year, we were overweight. This change materialized through new purchases including Toyota Motor Corp., SCSK Corp. and Rohm Co. Ltd. The biggest decline in relative weights over the year were in the U.K. and Sweden. In the U.K., we moved from an overweight at the start of the year to an underweight by the end, brought about by the sales of Unilever PLC and Prudential PLC, and the reduction of holdings in RELX PLC and Rio Tinto PLC.
In addition to Toyota and Nestlé, Novo Nordisk AS was added to the portfolio. We believe Nestlé boasts a diverse portfolio of standout businesses, and has the potential to improve its returns under new management. Its scale and strong brand support customer loyalty and act as robust barriers to entry by others. Toyota had been demonstrating strong earnings stability and margin improvement, despite adverse external conditions. Novo Nordisk is a global healthcare company specializing in diabetes care. Its products include insulin and insulin-delivery devices. We believe the company is on a path of sustainable growth, which may exceed that of its wider sector. Our most significant sale was Unilever, which reflected concerns around its growth outlook, related to a growing consumer shift towards niche products and retailers’ private labels. Swedish commercial vehicle and construction equipment manufacturer Volvo AB had delivered strong results, driven by both the truck and construction equipment segments, but reported declining orders. We also sold Japanese sporting equipment manufacturer Shimano, Inc. The company has a strong brand and a significant share of the global bicycle components market. However, sentiment has been hurt by concerns around a lack of cost savings due to falling production efficiency and the slow automation of the disc-brake-assembly process.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Growth securities, at times, may not perform as well as value securities or the stock market in general and may be out of favor with investors. Value securities may be unprofitable if the market fails to recognize their intrinsic worth or the portfolio manager misgauged that worth. International investing involves certain risks and volatility due to potential political, economic or currency instabilities and different financial and accounting standards. Risks are enhanced for emerging market issuers. Investing in derivatives is a specialized activity that involves special risks that subject the Fund to significant loss potential, including when used as leverage, and may result in greater fluctuation in fund value. The value of the Fund’s portfolio may be more volatile due to concentrated investments in similar industries, sectors or geographical regions. Investments in a limited number of companies subject the Fund to greater risk of loss. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Select International Equity Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,010.70 1,018.35 6.55 6.57 1.31
Advisor Class 1,000.00 1,000.00 1,011.80 1,019.59 5.30 5.32 1.06
Class C 1,000.00 1,000.00 1,006.50 1,014.62 10.28 10.32 2.06
Institutional Class 1,000.00 1,000.00 1,011.20 1,019.59 5.30 5.32 1.06
Institutional 2 Class 1,000.00 1,000.00 1,013.10 1,020.24 4.65 4.67 0.93
Institutional 3 Class 1,000.00 1,000.00 1,013.10 1,020.59 4.30 4.32 0.86
Class R 1,000.00 1,000.00 1,009.30 1,017.11 7.79 7.82 1.56
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Select International Equity Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 95.6%
Issuer Shares Value ($)
Australia 3.2%
CSL Ltd. 37,205 7,599,932
Canada 2.0%
Suncor Energy, Inc. 171,741 4,732,874
China 0.0%
China Milk Products Group Ltd.(a),(b),(c) 7,426,000 5
Denmark 4.2%
Novo Nordisk A/S, Class B 113,070 6,624,654
Ørsted A/S 33,201 3,427,632
Total 10,052,286
France 9.8%
Airbus Group SE 42,559 5,136,813
BNP Paribas SA 49,209 2,388,620
EssilorLuxottica SA 34,993 4,796,832
L’Oreal SA 13,770 3,701,161
Pernod Ricard SA 25,444 4,149,258
Total SA 70,766 3,058,675
Total 23,231,359
Germany 4.2%
Adidas AG 7,564 2,129,631
Deutsche Telekom AG, Registered Shares 365,030 5,979,739
Knorr-Bremse AG 17,983 1,826,217
Total 9,935,587
Hong Kong 1.3%
AIA Group Ltd. 316,400 3,171,102
India 1.1%
HDFC Bank Ltd. 156,000 2,560,565
Indonesia 1.7%
PT Bank Rakyat Indonesia Persero Tbk 13,851,700 4,139,262
Ireland 3.6%
CRH PLC 250,410 8,447,879
Japan 29.4%
Bridgestone Corp. 91,400 3,029,055
Capcom Co., Ltd. 221,700 6,028,382
Daikin Industries Ltd. 22,600 3,044,766
Common Stocks (continued)
Issuer Shares Value ($)
Hoya Corp. 47,300 4,194,028
Keyence Corp. 8,600 2,746,028
Koito Manufacturing Co., Ltd. 69,700 2,730,477
Kubota Corp. 377,200 5,289,010
Nidec Corp. 25,900 3,050,329
Nihon M&A Center, Inc. 182,400 5,618,920
Nintendo Co., Ltd. 7,100 2,380,165
Pigeon Corp. 60,100 2,030,770
Recruit Holdings Co., Ltd. 88,400 3,091,595
Rohm Co., Ltd. 49,800 3,254,740
SCSK Corp. 82,000 4,265,384
Sony Corp. 43,800 2,700,177
Terumo Corp. 174,100 5,590,139
Toyota Motor Corp. 109,800 7,209,986
Yaskawa Electric Corp. 113,700 3,542,141
Total 69,796,092
Malta 0.0%
BGP Holdings PLC(a),(b),(c) 2,232,232 2
Netherlands 4.8%
ASML Holding NV 20,250 5,615,187
ING Groep NV 597,887 5,725,271
Total 11,340,458
Singapore 1.4%
DBS Group Holdings Ltd. 194,100 3,393,686
South Korea 0.9%
Samsung Electronics Co., Ltd. 47,743 2,148,978
Spain 1.1%
Industria de Diseno Textil SA 83,703 2,611,447
Sweden 1.6%
Hexagon AB, Class B 72,652 3,913,700
Switzerland 10.6%
Nestlé SA, Registered Shares 76,372 7,859,123
Roche Holding AG, Genusschein Shares 36,073 11,598,688
Sika AG 32,021 5,731,874
Total 25,189,685
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Select International Equity Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
United Kingdom 14.7%
3i Group PLC 247,747 3,261,140
DCC PLC 31,689 2,269,663
Ferguson PLC 48,304 4,208,713
HSBC Holdings PLC 804,701 5,435,148
Legal & General Group PLC 1,705,927 5,779,467
RELX PLC 230,473 5,544,880
Rio Tinto PLC 56,943 2,680,855
TechnipFMC PLC 239,589 3,654,809
Whitbread PLC 43,117 2,174,605
Total 35,009,280
Total Common Stocks
(Cost $200,035,638)
227,274,179
Money Market Funds 4.4%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(d),(e) 10,342,696 10,342,696
Total Money Market Funds
(Cost $10,342,568)
10,342,696
Total Investments in Securities
(Cost $210,378,206)
237,616,875
Other Assets & Liabilities, Net   107,187
Net Assets $237,724,062
 
Notes to Portfolio of Investments
(a) Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At February 29, 2020, the total value of these securities amounted to $7, which represents less than 0.01% of total net assets.
(b) Non-income producing investment.
(c) Valuation based on significant unobservable inputs.
(d) The rate shown is the seven-day current annualized yield at February 29, 2020.
(e) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  1,697,978 73,406,512 (64,761,794) 10,342,696 315 128 116,882 10,342,696
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select International Equity Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Foreign equity securities actively traded in markets where there is a significant delay in the local close relative to the New York Stock Exchange are classified as Level 2. The values of these securities may include an adjustment to reflect the impact of market movements following the close of local trading, as described in Note 2 to the financial statements – Security valuation.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Australia 7,599,932 7,599,932
Canada 4,732,874 4,732,874
China 5 5
Denmark 10,052,286 10,052,286
France 23,231,359 23,231,359
Germany 9,935,587 9,935,587
Hong Kong 3,171,102 3,171,102
India 2,560,565 2,560,565
Indonesia 4,139,262 4,139,262
Ireland 8,447,879 8,447,879
Japan 69,796,092 69,796,092
Malta 2 2
Netherlands 11,340,458 11,340,458
Singapore 3,393,686 3,393,686
South Korea 2,148,978 2,148,978
Spain 2,611,447 2,611,447
Sweden 3,913,700 3,913,700
Switzerland 25,189,685 25,189,685
United Kingdom 35,009,280 35,009,280
Total Common Stocks 4,732,874 222,541,298 7 227,274,179
Money Market Funds 10,342,696 10,342,696
Total Investments in Securities 15,075,570 222,541,298 7 237,616,875
See the Portfolio of Investments for all investment classifications not indicated in the table.
The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets. These assets include certain foreign securities for which a third party statistical pricing service may be employed for purposes of fair market valuation. The model utilized by such third party statistical pricing service takes into account a security’s correlation to available market data including, but not limited to, intraday index, ADR, and exchange-traded fund movements.
The Fund does not hold any significant investments (greater than one percent of net assets) categorized as Level 3.
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Select International Equity Fund  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $200,035,638) $227,274,179
Affiliated issuers (cost $10,342,568) 10,342,696
Cash 37,655
Foreign currency (cost $1,595) 1,422
Receivable for:  
Investments sold 1,197,344
Capital shares sold 24,995
Dividends 472,078
Foreign tax reclaims 570,507
Expense reimbursement due from Investment Manager 464
Prepaid expenses 1,443
Total assets 239,922,783
Liabilities  
Payable for:  
Investments purchased 1,495,661
Capital shares purchased 334,775
Foreign capital gains taxes deferred 10,955
Management services fees 5,676
Distribution and/or service fees 1,159
Transfer agent fees 32,206
Compensation of board members 255,084
Compensation of chief compliance officer 3
Other expenses 63,202
Total liabilities 2,198,721
Net assets applicable to outstanding capital stock $237,724,062
Represented by  
Paid in capital 211,013,713
Total distributable earnings (loss) 26,710,349
Total - representing net assets applicable to outstanding capital stock $237,724,062
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select International Equity Fund  | Annual Report 2020
11

Statement of Assets and Liabilities  (continued)
February 29, 2020
Class A  
Net assets $161,393,264
Shares outstanding 11,388,707
Net asset value per share $14.17
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $15.03
Advisor Class  
Net assets $436,183
Shares outstanding 29,892
Net asset value per share $14.59
Class C  
Net assets $1,597,012
Shares outstanding 129,388
Net asset value per share $12.34
Institutional Class  
Net assets $68,830,041
Shares outstanding 4,745,295
Net asset value per share $14.50
Institutional 2 Class  
Net assets $694,348
Shares outstanding 47,314
Net asset value per share $14.68
Institutional 3 Class  
Net assets $4,230,111
Shares outstanding 288,947
Net asset value per share $14.64
Class R  
Net assets $543,103
Shares outstanding 38,655
Net asset value per share $14.05
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Select International Equity Fund  | Annual Report 2020

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $7,093,506
Dividends — affiliated issuers 116,882
Interfund lending 116
Foreign taxes withheld (500,208)
Total income 6,710,296
Expenses:  
Management services fees 2,278,089
Distribution and/or service fees  
Class A 440,752
Class C 20,681
Class R 3,338
Transfer agent fees  
Class A 398,202
Advisor Class 1,186
Class C 4,718
Institutional Class 172,534
Institutional 2 Class 436
Institutional 3 Class 129
Class R 1,520
Compensation of board members 46,727
Custodian fees 37,749
Printing and postage fees 49,102
Registration fees 88,334
Audit fees 48,582
Legal fees 9,785
Interest on interfund lending 256
Compensation of chief compliance officer 56
Other 7,342
Total expenses 3,609,518
Fees waived or expenses reimbursed by Investment Manager and its affiliates (347,310)
Expense reduction (11,238)
Total net expenses 3,250,970
Net investment income 3,459,326
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 17,040,963
Investments — affiliated issuers 315
Foreign currency translations (10,689)
Net realized gain 17,030,589
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (7,539,190)
Investments — affiliated issuers 128
Foreign currency translations (89)
Foreign capital gains tax (10,955)
Net change in unrealized appreciation (depreciation) (7,550,106)
Net realized and unrealized gain 9,480,483
Net increase in net assets resulting from operations $12,939,809
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select International Equity Fund  | Annual Report 2020
13

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $3,459,326 $3,998,278
Net realized gain 17,030,589 17,782,687
Net change in unrealized appreciation (depreciation) (7,550,106) (37,568,948)
Net increase (decrease) in net assets resulting from operations 12,939,809 (15,787,983)
Distributions to shareholders    
Net investment income and net realized gains    
Class A (2,419,796) (4,252,126)
Advisor Class (8,354) (14,568)
Class C (15,837) (156,921)
Institutional Class (1,221,997) (2,057,724)
Institutional 2 Class (10,834) (9,218)
Institutional 3 Class (94,523) (180,777)
Class R (7,838) (15,845)
Class T (16,886)
Total distributions to shareholders (3,779,179) (6,704,065)
Decrease in net assets from capital stock activity (34,760,318) (33,108,125)
Total decrease in net assets (25,599,688) (55,600,173)
Net assets at beginning of year 263,323,750 318,923,923
Net assets at end of year $237,724,062 $263,323,750
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Select International Equity Fund  | Annual Report 2020

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 128,070 1,856,298 679,422 9,697,135
Distributions reinvested 153,255 2,167,024 264,619 3,794,637
Redemptions (1,621,614) (23,620,631) (2,135,188) (29,745,464)
Net decrease (1,340,289) (19,597,309) (1,191,147) (16,253,692)
Advisor Class        
Subscriptions 7,102 102,724 26,548 386,581
Distributions reinvested 570 8,289 982 14,469
Redemptions (14,399) (212,854) (21,240) (288,452)
Net increase (decrease) (6,727) (101,841) 6,290 112,598
Class C        
Subscriptions 10,178 132,572 21,702 257,763
Distributions reinvested 1,201 14,867 12,251 153,987
Redemptions (98,011) (1,228,816) (690,771) (8,714,365)
Net decrease (86,632) (1,081,377) (656,818) (8,302,615)
Institutional Class        
Subscriptions 404,028 6,108,036 440,167 6,235,639
Distributions reinvested 73,704 1,064,287 120,748 1,768,962
Redemptions (1,196,076) (17,971,616) (1,079,645) (15,248,429)
Net decrease (718,344) (10,799,293) (518,730) (7,243,828)
Institutional 2 Class        
Subscriptions 30,030 449,809 10,412 149,581
Distributions reinvested 739 10,789 618 9,151
Redemptions (12,162) (186,475) (6,042) (86,429)
Net increase 18,607 274,123 4,988 72,303
Institutional 3 Class        
Subscriptions 5,019 75,948 25,132 363,159
Distributions reinvested 6,439 93,751 12,243 180,709
Redemptions (226,362) (3,352,329) (70,777) (1,091,406)
Net decrease (214,904) (3,182,630) (33,402) (547,538)
Class K        
Redemptions (2,577) (39,476)
Net decrease (2,577) (39,476)
Class R        
Subscriptions 13,276 186,770 12,544 176,778
Distributions reinvested 528 7,407 1,055 15,036
Redemptions (32,528) (466,168) (13,263) (184,271)
Net increase (decrease) (18,724) (271,991) 336 7,543
Class T        
Distributions reinvested 1,173 16,826
Redemptions (71,130) (930,246)
Net decrease (69,957) (913,420)
Total net decrease (2,367,013) (34,760,318) (2,461,017) (33,108,125)
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select International Equity Fund  | Annual Report 2020
15

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $13.75 0.18 0.44 0.62 (0.20) (0.20)
Year Ended 2/28/2019 $14.81 0.18 (0.92) (0.74) (0.32) (0.32)
Year Ended 2/28/2018 $12.30 0.12 2.62 2.74 (0.23) (0.23)
Year Ended 2/28/2017 $11.41 0.12 0.90 1.02 (0.13) (0.13)
Year Ended 2/29/2016 $13.69 0.10 (2.44) (2.34)
Advisor Class
Year Ended 2/29/2020 $14.15 0.23 0.44 0.67 (0.23) (0.23)
Year Ended 2/28/2019 $15.24 0.22 (0.96) (0.74) (0.35) (0.35)
Year Ended 2/28/2018 $12.64 0.10 2.76 2.86 (0.26) (0.26)
Year Ended 2/28/2017 $11.73 0.07 1.00 1.07 (0.16) (0.16)
Year Ended 2/29/2016 $14.04 0.15 (2.52) (2.37)
Class C
Year Ended 2/29/2020 $11.99 0.09 0.35 0.44 (0.09) (0.09)
Year Ended 2/28/2019 $12.94 0.18 (0.92) (0.74) (0.21) (0.21)
Year Ended 2/28/2018 $10.77 0.03 2.28 2.31 (0.14) (0.14)
Year Ended 2/28/2017 $10.00 (0.01) 0.81 0.80 (0.03) (0.03)
Year Ended 2/29/2016 $12.08 0.00(h) (2.13) (2.13)
Institutional Class
Year Ended 2/29/2020 $14.07 0.22 0.44 0.66 (0.23) (0.23)
Year Ended 2/28/2019 $15.14 0.23 (0.95) (0.72) (0.35) (0.35)
Year Ended 2/28/2018 $12.57 0.16 2.67 2.83 (0.26) (0.26)
Year Ended 2/28/2017 $11.66 0.15 0.92 1.07 (0.16) (0.16)
Year Ended 2/29/2016 $13.96 0.16 (2.52) (2.36)
Institutional 2 Class
Year Ended 2/29/2020 $14.23 0.21 0.49 0.70 (0.25) (0.25)
Year Ended 2/28/2019 $15.31 0.23 (0.94) (0.71) (0.37) (0.37)
Year Ended 2/28/2018 $12.70 0.12 2.77 2.89 (0.28) (0.28)
Year Ended 2/28/2017 $11.79 0.16 0.94 1.10 (0.19) (0.19)
Year Ended 2/29/2016 $14.08 0.17 (2.52) (2.35)
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Select International Equity Fund  | Annual Report 2020

Financial Highlights  (continued)
  Proceeds from
regulatory
settlements
Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $14.17 4.49% 1.46%(c) 1.32%(c),(d) 1.23% 31% $161,393
Year Ended 2/28/2019 $13.75 (5.10%) 1.48%(c) 1.36%(c),(d) 1.31% 34% $175,021
Year Ended 2/28/2018 $14.81 22.50% 1.50% 1.40%(d) 0.89% 34% $206,109
Year Ended 2/28/2017 $12.30 8.98% 1.44%(e),(f) 1.33%(d),(e),(f) 1.02% 103% $220,357
Year Ended 2/29/2016 0.06 $11.41 (16.65%)(g) 1.45%(e) 1.42%(d),(e) 0.78% 131% $210,841
Advisor Class
Year Ended 2/29/2020 $14.59 4.75% 1.21%(c) 1.07%(c),(d) 1.56% 31% $436
Year Ended 2/28/2019 $14.15 (4.93%) 1.23%(c) 1.12%(c),(d) 1.51% 34% $518
Year Ended 2/28/2018 $15.24 22.89% 1.24% 1.15%(d) 0.70% 34% $462
Year Ended 2/28/2017 $12.64 9.18% 1.18%(e),(f) 1.06%(d),(e),(f) 0.57% 103% $182
Year Ended 2/29/2016 0.06 $11.73 (16.45%)(g) 1.21%(e) 1.18%(d),(e) 1.16% 131% $22
Class C
Year Ended 2/29/2020 $12.34 3.67% 2.21%(c) 2.07%(c),(d) 0.71% 31% $1,597
Year Ended 2/28/2019 $11.99 (5.77%) 2.23%(c) 2.12%(c),(d) 1.47% 34% $2,589
Year Ended 2/28/2018 $12.94 21.62% 2.25% 2.15%(d) 0.22% 34% $11,296
Year Ended 2/28/2017 $10.77 8.02% 2.18%(e),(f) 2.07%(d),(e),(f) (0.06%) 103% $13,673
Year Ended 2/29/2016 0.05 $10.00 (17.22%)(g) 2.20%(e) 2.18%(d),(e) 0.02% 131% $7,886
Institutional Class
Year Ended 2/29/2020 $14.50 4.71% 1.21%(c) 1.07%(c),(d) 1.50% 31% $68,830
Year Ended 2/28/2019 $14.07 (4.83%) 1.23%(c) 1.12%(c),(d) 1.57% 34% $76,853
Year Ended 2/28/2018 $15.14 22.76% 1.25% 1.15%(d) 1.14% 34% $90,578
Year Ended 2/28/2017 $12.57 9.25% 1.19%(e),(f) 1.08%(d),(e),(f) 1.20% 103% $69,419
Year Ended 2/29/2016 0.06 $11.66 (16.48%)(g) 1.19%(e) 1.17%(d),(e) 1.20% 131% $64,631
Institutional 2 Class
Year Ended 2/29/2020 $14.68 4.92% 1.05%(c) 0.94%(c) 1.37% 31% $694
Year Ended 2/28/2019 $14.23 (4.72%) 1.05%(c) 0.99%(c) 1.62% 34% $408
Year Ended 2/28/2018 $15.31 23.00% 1.08% 1.02% 0.81% 34% $363
Year Ended 2/28/2017 $12.70 9.33% 0.96%(e),(f) 0.93%(e),(f) 1.33% 103% $117
Year Ended 2/29/2016 0.06 $11.79 (16.26%)(g) 1.01%(e) 1.01%(e) 1.23% 131% $59
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select International Equity Fund  | Annual Report 2020
17

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Total
distributions to
shareholders
Institutional 3 Class
Year Ended 2/29/2020 $14.19 0.29 0.42 0.71 (0.26) (0.26)
Year Ended 2/28/2019 $15.27 0.25 (0.95) (0.70) (0.38) (0.38)
Year Ended 2/28/2018 $12.67 0.19 2.70 2.89 (0.29) (0.29)
Year Ended 2/28/2017 $11.76 0.19 0.91 1.10 (0.19) (0.19)
Year Ended 2/29/2016 $14.04 0.17 (2.51) (2.34)
Class R
Year Ended 2/29/2020 $13.63 0.16 0.42 0.58 (0.16) (0.16)
Year Ended 2/28/2019 $14.69 0.14 (0.92) (0.78) (0.28) (0.28)
Year Ended 2/28/2018 $12.20 0.09 2.60 2.69 (0.20) (0.20)
Year Ended 2/28/2017 $11.32 0.07 0.91 0.98 (0.10) (0.10)
Year Ended 2/29/2016 $13.62 0.07 (2.43) (2.36)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) Ratios include interfund lending expense which is less than 0.01%.
(d) The benefits derived from expense reductions had an impact of less than 0.01%.
(e) Ratios include line of credit interest expense which is less than 0.01%.
(f) Expenses have been reduced due to a reimbursement of expenses overbilled by a third party. If the reimbursement had been excluded, the expense ratios would have been higher by the percentages shown for each class in the table below. All fee waivers and expense reimbursements by the Investment Manager and its affiliates were applied before giving effect to this third party reimbursement.
    
Year Ended Class A Advisor
Class
Class C Institutional
Class
Institutional 2
Class
Institutional 3
Class
Class R
02/28/2017 0.08% 0.10% 0.09% 0.08% 0.08% 0.08% 0.08%
    
(g) The Fund received proceeds from regulatory settlements. Had the Fund not received these proceeds, the total return would have been lower by 0.44%.
(h) Rounds to zero.
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Select International Equity Fund  | Annual Report 2020

Financial Highlights  (continued)
  Proceeds from
regulatory
settlements
Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Institutional 3 Class
Year Ended 2/29/2020 $14.64 5.01% 0.98%(c) 0.87%(c) 1.94% 31% $4,230
Year Ended 2/28/2019 $14.19 (4.68%) 0.98%(c) 0.92%(c) 1.73% 34% $7,151
Year Ended 2/28/2018 $15.27 23.03% 1.00% 0.95% 1.36% 34% $8,203
Year Ended 2/28/2017 $12.67 9.42% 0.90%(e),(f) 0.88%(e),(f) 1.56% 103% $10,108
Year Ended 2/29/2016 0.06 $11.76 (16.24%)(g) 0.95%(e) 0.95%(e) 1.26% 131% $11,312
Class R
Year Ended 2/29/2020 $14.05 4.26% 1.71%(c) 1.57%(c),(d) 1.13% 31% $543
Year Ended 2/28/2019 $13.63 (5.37%) 1.73%(c) 1.62%(c),(d) 1.02% 34% $782
Year Ended 2/28/2018 $14.69 22.24% 1.75% 1.65%(d) 0.68% 34% $838
Year Ended 2/28/2017 $12.20 8.66% 1.68%(e),(f) 1.58%(d),(e),(f) 0.55% 103% $1,014
Year Ended 2/29/2016 0.06 $11.32 (16.89%)(g) 1.70%(e) 1.67%(d),(e) 0.54% 131% $808
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select International Equity Fund  | Annual Report 2020
19

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Select International Equity Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
20 Columbia Select International Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Foreign currency transactions and translations
The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.
For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Columbia Select International Equity Fund  | Annual Report 2020
21

Notes to Financial Statements  (continued)
February 29, 2020
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.87% to 0.67% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.87% of the Fund’s average daily net assets.
Subadvisory agreement
The Investment Manager has entered into a Subadvisory Agreement with Threadneedle International Limited (Threadneedle), an affiliate of the Investment Manager and an indirect wholly-owned subsidiary of Ameriprise Financial, to serve as the subadviser to the Fund. The Investment Manager compensates Threadneedle to manage the investment of the Fund’s assets.
22 Columbia Select International Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.23
Advisor Class 0.23
Class C 0.23
Institutional Class 0.23
Institutional 2 Class 0.07
Institutional 3 Class 0.00
Class R 0.23
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $11,238.
Columbia Select International Equity Fund  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 10,149
Class C 1.00(b) 6
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 1.31% 1.35%
Advisor Class 1.06 1.10
Class C 2.06 2.10
Institutional Class 1.06 1.10
Institutional 2 Class 0.93 0.97
Institutional 3 Class 0.86 0.90
Class R 1.56 1.60
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This
24 Columbia Select International Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, capital loss carryforward, foreign currency transactions, passive foreign investment company (PFIC) holdings, and former PFIC holdings. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Undistributed net
investment
income ($)
Accumulated
net realized
(loss) ($)
Paid in
capital ($)
1,081,278 (1,081,278)
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
3,779,179 3,779,179 6,704,065 6,704,065
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
3,759,119 (2,017,794) 25,243,920
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
212,372,955 45,524,736 (20,280,816) 25,243,920
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Columbia Select International Equity Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
The following capital loss carryforwards, determined at February 29, 2020, may be available to reduce taxable income arising from future net realized gains on investments, if any, to the extent permitted by the Internal Revenue Code. Capital loss carryforwards with no expiration are required to be utilized prior to any capital losses which carry an expiration date. As a result of this ordering rule, capital loss carryforwards which carry an expiration date may be more likely to expire unused. In addition, for the year ended February 29, 2020, capital loss carryforwards utilized and expired unused, if any, were as follows:
No expiration
short-term ($)
No expiration
long-term ($)
Total ($) Utilized ($) Expired ($)
(2,017,794) (2,017,794) 15,757,509
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $77,782,337 and $120,870,885, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Borrower 614,286 2.14 7
Lender 400,000 2.61 4
Interest income earned and interest expense incurred by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at February 29, 2020.
26 Columbia Select International Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Foreign securities and emerging market countries risk
Investing in foreign securities may involve certain risks not typically associated with investing in U.S. securities, such as increased currency volatility and risks associated with political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, which may result in significant market volatility. In addition, certain foreign securities may not be as liquid as U.S. securities. Investing in emerging markets may increase these risks and expose the Fund to elevated risks associated with increased inflation, deflation or currency devaluation. To the extent that the Fund concentrates its investment exposure to any one or a few specific countries, the Fund will be particularly susceptible to the risks associated with the conditions, events or other factors impacting those countries or regions and may, therefore, have a greater risk than that of a fund that is more geographically diversified.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing
Columbia Select International Equity Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Shareholder concentration risk
At February 29, 2020, affiliated shareholders of record owned 33.5% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued. Other than as noted below, there were no items requiring adjustment of the financial statements or additional disclosure.
In February 2020, the Board of Trustees approved a proposal to reorganize Columbia Select International Equity Fund with and into Columbia Acorn International Select (the Reorganization). The Reorganization is subject to certain conditions, including approval by shareholders of the Fund. A proxy statement/prospectus has been distributed to shareholders, and a joint meeting of shareholders to consider the Reorganization will be held in June 2020. If approved by shareholders, the Reorganization is expected to occur shortly thereafter and is expected to be a tax-free reorganization for U.S. federal income tax purposes. Fund shareholders will not pay any sales charges as a result of the Reorganization.
On March 31, 2020, certain European issuers canceled dividends following a request originating from the Bank of England, amid the economic uncertainty surrounding the COVID 19 pandemic. These financial statements include income recorded on the ex-date of these securities, in the amount of $168,987, which was 2.52% of total income. Upon notification of the cancelation, the Fund reversed the income previously recognized.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to
28 Columbia Select International Equity Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
Columbia Select International Equity Fund  | Annual Report 2020
29

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Select International Equity Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Select International Equity Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the five years in the period ended February 29, 2020 (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the five years in the period ended February 29, 2020 in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers; when replies were not received from brokers, we performed other auditing procedures. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
30 Columbia Select International Equity Fund  | Annual Report 2020

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Foreign
taxes paid
to foreign
countries
Foreign
taxes paid
per share
to foreign
countries
Foreign
source
income
Foreign
source
income per
share
100.00% $500,208 $0.03 $7,093,506 $0.43
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Foreign taxes. The Fund makes the election to pass through to shareholders the foreign taxes paid. Eligible shareholders may claim a foreign tax credit. These taxes, and the corresponding foreign source income, are provided.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Columbia Select International Equity Fund  | Annual Report 2020
31

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
32 Columbia Select International Equity Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Select International Equity Fund  | Annual Report 2020
33

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
34 Columbia Select International Equity Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Select International Equity Fund  | Annual Report 2020
35

Columbia Select International Equity Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN201_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Select Global Growth Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Select Global Growth Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Select Global Growth Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks long-term growth of capital.
Portfolio management
Thomas Galvin, CFA
Lead Portfolio Manager
Managed Fund since 2015
Richard Carter
Portfolio Manager
Managed Fund since 2015
Todd Herget
Portfolio Manager
Managed Fund since 2015
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A Excluding sales charges 04/30/08 12.22 6.54 10.80
  Including sales charges   5.78 5.29 10.14
Advisor Class* 01/08/14 12.45 6.80 10.96
Class C Excluding sales charges 04/30/08 11.37 5.74 9.96
  Including sales charges   10.37 5.74 9.96
Institutional Class 04/30/08 12.44 6.81 11.07
Institutional 2 Class* 01/08/14 12.54 6.87 11.00
Institutional 3 Class* 03/01/17 12.59 6.76 10.91
Class R 04/30/08 11.90 6.29 10.52
MSCI ACWI (Net)   3.89 5.55 8.10
MSCI ACWI Growth Index (Net)   11.59 8.22 10.07
Returns for Class A shares are shown with and without the maximum initial sales charge of 5.75%. Returns for Class C shares are shown with and without the 1.00% contingent deferred sales charge for the first year only. The Fund’s other share classes are not subject to sales charges and have limited eligibility. Please see the Fund’s prospectus for details. Performance for different share classes will vary based on differences in sales charges and fees associated with each share class. All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. Since the Fund launched more than one class of shares at its inception, Class A shares were used. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The MSCI ACWI (Net) is a free float-adjusted market capitalization weighted index that is designed to measure the equity market performance of developed and emerging markets. The index consists of 46 country indices comprising 23 developed and 23 emerging market country indices.
The MSCI ACWI Growth Index (Net) captures large and mid-cap securities exhibiting overall growth style characteristics across 23 developed markets countries and 23 emerging markets countries. The growth investment style characteristics for index construction are defined using five variables: long-term forward EPS growth rate, short-term forward EPS growth rate, current internal growth rate and long-term historical EPS growth trend and long-term historical sales per share growth trend.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes (except the MSCI ACWI (Net) and the MSCI ACWI Growth Index (Net), which reflect reinvested dividends net of withholding taxes) or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Select Global Growth Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Select Global Growth Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 11.3
Consumer Discretionary 22.3
Energy 1.1
Financials 4.8
Health Care 23.2
Industrials 4.3
Information Technology 33.0
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
Country breakdown (%) (at February 29, 2020)
Brazil 2.3
Canada 1.0
China 14.0
Denmark 1.9
Germany 1.5
India 2.6
Japan 3.0
Russian Federation 1.6
Sweden 3.0
Switzerland 3.7
United Kingdom 4.9
United States 60.5
Total 100.0
Country breakdown is based primarily on issuer’s place of organization/incorporation. Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
The Fund may use place of organization/incorporation or other factors in determining whether an issuer is domestic (U.S.) or foreign for purposes of its investment policies. At February 29, 2020, the Fund invested at least 40% of its net assets in foreign companies in accordance with its principal investment strategy.
 
4 Columbia Select Global Growth Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned 12.22% excluding sales charges, significantly outperforming its benchmark, the MSCI ACWI (Net), which returned 3.89%. The Fund also outperformed the MSCI ACWI Growth Index (Net), which returned 11.59%. Stock selection contributed to the Fund’s performance relative to its benchmark in most sectors. The Fund’s biggest gains against the benchmark were from the consumer discretionary, health care and information technology sectors.
Global uncertainty cut into stock market gains, economic growth
Optimism prevailed early in 2019, buoyed by dovish signals from the U.S. Federal Reserve, signs of possible progress in U.S.-China trade talks and a recovery from meaningful stock market losses in 2018. However, the pace of U.S. growth slowed to an estimated 2.1% for the year. In Europe, economic growth slowed as trade tensions and uncertainty mounted regarding Brexit (the U.K.’s departure from the European Union), which was finally resolved late in 2019. At the same time, emerging markets came under pressure, driven by trade and tariff concerns. China’s economic conditions weakened and the spread of the coronavirus introduced enough global uncertainty to drive stock markets around the world down sharply in the final week of the period, raising concerns about the impact on global economic growth going forward.
Contributors and detractors
Stock selection aided Fund results relative to the benchmark across most sectors. In the consumer discretionary sector, stock selection combined with a significant overweight led to the Fund’s performance advantage over the benchmark. Positions in Evolution Gaming Group AB, New Oriental Education & Technology Group, Inc. and MercadoLibre, Inc. were top performers. Evolution Gaming, a leading provider of Live Casino solutions, rose on continued announcements of new partnerships, market share gains and significant operating leverage. The company has benefited from investment in and expansion of its U.S. sites, increased European market share and expanded operating margins. New Oriental Education shares climbed as the company delivered better-than-expected revenues, margins and earnings guidance. New Oriental expanded the number of its learning centers by 14% year over year. Shares of South American e-commerce leader MercadoLibre rallied as the firm reported better-than-expected gross merchandise volumes in Brazil. MercadoLibre also noted impressive growth in its payments business and further good news when it was announced that payment processor PayPal would make a strategic investment in the company. We took profits and exited the position.
In the health care sector, positions in Lonza Group AG and Wuxi Biologics Cayman, Inc. made significant contributions to Fund gains. Lonza is a market leader in higher value biologics businesses, including antibody, antibody-drug conjugate, gene-viral therapy and cell therapy. The company has pruned its portfolio to help shed its conglomerate past and has focused future returns on higher yielding business units. Results to date have generally exceeded expectations and we believe that future capital spending projects have the potential to bear fruit over the next two years. Wuxi is a China-based contract development and manufacturing organization, the only biologics technology platform that provides end-to-end solutions to discover, develop or manufacture biologics, a global market that has grown an estimated average of 15% annually over the past four years. China’s top seven firms hold 80% of the industry’s global market share. Wuxi accounts for half of that.
In the information technology sector, semiconductor equipment manufacturer NVIDIA Corp. rebounded from a challenging end of 2018, as it laid out its plans in the large, growing markets of gaming, professional visualization, data center and autonomous driving.
In the software industry, significant positions in ServiceNow, Inc., Splunk, Inc. and Adobe, Inc. aided relative performance. However, the relative gains created by holding these positions were somewhat offset by lack of exposure to mega-cap Microsoft Corp., which detracted from relative results, given its weight in the benchmark. ServiceNow shares got off to a fast start to the year when it reported accelerating billings growth and better-than-expected earnings guidance. Splunk exceeded revenue expectations as the company transitioned its business model to more renewable contracts. Adobe benefited from strength in its digital media and improvement in its digital experience business lines.
In the communication services sector, Activision Blizzard, Inc. and Facebook, Inc. were notable contributors and accounted for the majority of the Fund’s relative outperformance in the sector. Shares of Activision, with a stable of historically dependable franchises and new ones on the way, bounced back strongly after a weak 2018. The company beat both revenue and earnings forecasts in the 2019 fourth-quarter holiday season. Facebook continued to navigate challenging media headlines delivering better-than-anticipated user engagement, strong fundamentals and growth throughout the year.
Columbia Select Global Growth Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
In a period of few disappointments, the Fund lagged its benchmark in the financials sector where Burford Capital Ltd., a litigation finance company, lost ground. Buford shares declined after a highly negative report accused the company of financial irregularities, including inflating returns from legal cases it had funded. We exited the Fund’s position.
At period’s end
We believe recent volatility has presented buying opportunities; and while many investors navigate the day-to-day headlines, we continue to take the long-term view that many of the companies in the portfolio have strong underlying fundamentals and we believe their long-term secular growth stories remain intact.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Growth securities, at times, may not perform as well as value securities or the stock market in general and may be out of favor with investors. International investing involves certain risks and volatility due to potential political, economic or currency instabilities and different financial and accounting standards. Risks are enhanced for emerging market issuers. Investing in derivatives is a specialized activity that involves special risks, which may result in significant losses. Investments in a limited number of companies subject the Fund to greater risk of loss. See the Fund’s prospectus for more information on these and other risks. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Select Global Growth Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which generally include sales charges on purchases and may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as sales charges, or redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,087.70 1,018.55 6.59 6.37 1.27
Advisor Class 1,000.00 1,000.00 1,088.60 1,019.79 5.30 5.12 1.02
Class C 1,000.00 1,000.00 1,083.60 1,014.82 10.46 10.12 2.02
Institutional Class 1,000.00 1,000.00 1,089.20 1,019.79 5.30 5.12 1.02
Institutional 2 Class 1,000.00 1,000.00 1,088.90 1,020.04 5.04 4.87 0.97
Institutional 3 Class 1,000.00 1,000.00 1,089.10 1,020.34 4.73 4.57 0.91
Class R 1,000.00 1,000.00 1,086.60 1,017.30 7.89 7.62 1.52
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Select Global Growth Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 99.7%
Issuer Shares Value ($)
Brazil 2.3%
Pagseguro Digital Ltd., Class A(a) 46,877 1,470,532
Canada 1.0%
Canada Goose Holdings, Inc.(a) 22,380 617,017
China 14.1%
Alibaba Group Holding Ltd., ADR(a) 14,197 2,952,976
New Oriental Education & Technology Group, Inc., ADR(a) 15,827 2,024,115
Tencent Holdings Ltd. 37,500 1,901,426
Wuxi Biologics Cayman, Inc.(a) 134,500 2,003,340
Total 8,881,857
Denmark 1.9%
Novo Nordisk A/S, Class B 21,003 1,230,544
Germany 1.5%
Infineon Technologies AG 43,626 931,137
India 2.6%
HDFC Bank Ltd., ADR 29,680 1,627,948
Japan 3.0%
Keyence Corp. 6,000 1,915,833
Russian Federation 1.6%
Yandex NV, Class A(a) 24,245 984,589
Sweden 3.0%
Evolution Gaming Group AB 52,306 1,906,137
Switzerland 3.7%
Lonza Group AG, Registered Shares(a) 5,920 2,362,304
United Kingdom 5.0%
Ashtead Group PLC 61,685 1,933,919
AstraZeneca PLC 13,650 1,197,991
Total 3,131,910
United States 60.0%
Activision Blizzard, Inc. 32,827 1,908,233
Adobe, Inc.(a) 7,646 2,638,787
Alexion Pharmaceuticals, Inc.(a) 9,347 878,898
Align Technology, Inc.(a) 3,282 716,625
Common Stocks (continued)
Issuer Shares Value ($)
Amazon.com, Inc.(a) 1,513 2,850,114
Bio-Rad Laboratories, Inc., Class A(a) 4,652 1,637,597
Booking Holdings, Inc.(a) 1,161 1,968,661
Bristol-Myers Squibb Co. 14,689 867,532
Edwards Lifesciences Corp.(a) 4,524 926,696
Exact Sciences Corp.(a) 10,415 843,094
Facebook, Inc., Class A(a) 12,179 2,344,092
Illumina, Inc.(a) 3,774 1,002,639
Lyft, Inc., Class A(a) 20,630 786,416
MSCI, Inc. 4,658 1,376,159
Nike, Inc., Class B 19,349 1,729,414
NVIDIA Corp. 8,112 2,190,808
PayPal Holdings, Inc.(a) 14,394 1,554,408
Pioneer Natural Resources Co. 5,684 697,882
Salesforce.com, Inc.(a) 13,720 2,337,888
Sarepta Therapeutics, Inc.(a) 8,176 935,907
ServiceNow, Inc.(a) 7,599 2,477,958
Splunk, Inc.(a) 12,663 1,865,640
Square, Inc., Class A(a) 15,837 1,319,697
Visa, Inc., Class A 11,384 2,069,156
Total 37,924,301
Total Common Stocks
(Cost $41,407,892)
62,984,109
Money Market Funds 0.8%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(b),(c) 469,373 469,373
Total Money Market Funds
(Cost $469,373)
469,373
Total Investments in Securities
(Cost $41,877,265)
63,453,482
Other Assets & Liabilities, Net   (299,246)
Net Assets $63,154,236
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Select Global Growth Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Investments in derivatives
Forward foreign currency exchange contracts
Currency to
be sold
Currency to
be purchased
Counterparty Settlement
date
Unrealized
appreciation ($)
Unrealized
depreciation ($)
9,734,000 SEK 1,013,798 USD Morgan Stanley 03/26/2020 (357)
1,015,781 USD 1,503,000 AUD Morgan Stanley 03/26/2020 (36,098)
537,845 USD 2,281,000 BRL Morgan Stanley 03/26/2020 (28,543)
1,283,429 USD 1,695,000 CAD Morgan Stanley 03/26/2020 (20,588)
2,848,217 USD 2,582,000 EUR Morgan Stanley 03/26/2020 6,398
473,190 USD 51,460,000 JPY Morgan Stanley 03/26/2020 4,537
1,013,789 USD 1,194,975,000 KRW Morgan Stanley 03/26/2020 (21,386)
473,250 USD 644,000 SGD Morgan Stanley 03/26/2020 (10,832)
1,017,647 USD 30,436,000 TWD Morgan Stanley 03/26/2020 (6,412)
Total       10,935 (124,216)
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) The rate shown is the seven-day current annualized yield at February 29, 2020.
(c) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  3,451,325 19,201,625 (22,183,577) 469,373 (38) 35,725 469,373
Abbreviation Legend
ADR American Depositary Receipt
Currency Legend
AUD Australian Dollar
BRL Brazilian Real
CAD Canada Dollar
EUR Euro
JPY Japanese Yen
KRW South Korean Won
SEK Swedish Krona
SGD Singapore Dollar
TWD New Taiwan Dollar
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Global Growth Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Foreign equity securities actively traded in markets where there is a significant delay in the local close relative to the New York Stock Exchange are classified as Level 2. The values of these securities may include an adjustment to reflect the impact of market movements following the close of local trading, as described in Note 2 to the financial statements – Security valuation.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Brazil 1,470,532 1,470,532
Canada 617,017 617,017
China 4,977,091 3,904,766 8,881,857
Denmark 1,230,544 1,230,544
Germany 931,137 931,137
India 1,627,948 1,627,948
Japan 1,915,833 1,915,833
Russian Federation 984,589 984,589
Sweden 1,906,137 1,906,137
Switzerland 2,362,304 2,362,304
United Kingdom 3,131,910 3,131,910
United States 37,924,301 37,924,301
Total Common Stocks 47,601,478 15,382,631 62,984,109
Money Market Funds 469,373 469,373
Total Investments in Securities 48,070,851 15,382,631 63,453,482
Investments in Derivatives        
Asset        
Forward Foreign Currency Exchange Contracts 10,935 10,935
Liability        
Forward Foreign Currency Exchange Contracts (124,216) (124,216)
Total 48,070,851 15,269,350 63,340,201
See the Portfolio of Investments for all investment classifications not indicated in the table.
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Select Global Growth Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
The Fund’s assets assigned to the Level 2 input category are generally valued using the market approach, in which a security’s value is determined through reference to prices and information from market transactions for similar or identical assets. These assets include certain foreign securities for which a third party statistical pricing service may be employed for purposes of fair market valuation. The model utilized by such third party statistical pricing service takes into account a security’s correlation to available market data including, but not limited to, intraday index, ADR, and exchange-traded fund movements.
Derivative instruments are valued at unrealized appreciation (depreciation).
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Global Growth Fund  | Annual Report 2020
11

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $41,407,892) $62,984,109
Affiliated issuers (cost $469,373) 469,373
Unrealized appreciation on forward foreign currency exchange contracts 10,935
Receivable for:  
Investments sold 23,611
Capital shares sold 54,101
Dividends 39,086
Foreign tax reclaims 17,671
Prepaid expenses 1,172
Total assets 63,600,058
Liabilities  
Unrealized depreciation on forward foreign currency exchange contracts 124,216
Payable for:  
Capital shares purchased 223,396
Management services fees 1,502
Distribution and/or service fees 390
Transfer agent fees 5,589
Compensation of board members 48,272
Compensation of chief compliance officer 1
Audit fees 29,000
Other expenses 13,456
Total liabilities 445,822
Net assets applicable to outstanding capital stock $63,154,236
Represented by  
Paid in capital 41,644,877
Total distributable earnings (loss) 21,509,359
Total - representing net assets applicable to outstanding capital stock $63,154,236
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Select Global Growth Fund  | Annual Report 2020

Statement of Assets and Liabilities  (continued)
February 29, 2020
Class A  
Net assets $29,069,042
Shares outstanding 1,767,255
Net asset value per share $16.45
Maximum sales charge 5.75%
Maximum offering price per share (calculated by dividing the net asset value per share by 1.0 minus the maximum sales charge for Class A shares) $17.45
Advisor Class  
Net assets $2,271,268
Shares outstanding 134,361
Net asset value per share $16.90
Class C  
Net assets $6,850,333
Shares outstanding 452,704
Net asset value per share $15.13
Institutional Class  
Net assets $20,551,838
Shares outstanding 1,215,399
Net asset value per share $16.91
Institutional 2 Class  
Net assets $542,863
Shares outstanding 31,992
Net asset value per share $16.97
Institutional 3 Class  
Net assets $3,364,801
Shares outstanding 200,026
Net asset value per share $16.82
Class R  
Net assets $504,091
Shares outstanding 31,493
Net asset value per share $16.01
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Global Growth Fund  | Annual Report 2020
13

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $288,772
Dividends — affiliated issuers 35,725
Foreign taxes withheld (10,236)
Total income 314,261
Expenses:  
Management services fees 575,674
Distribution and/or service fees  
Class A 74,564
Class C 75,544
Class R 3,502
Transfer agent fees  
Class A 36,618
Advisor Class 2,877
Class C 9,291
Institutional Class 26,043
Institutional 2 Class 365
Institutional 3 Class 376
Class R 863
Compensation of board members 16,782
Custodian fees 18,947
Printing and postage fees 15,882
Registration fees 86,692
Audit fees 34,109
Legal fees 7,971
Interest on interfund lending 533
Compensation of chief compliance officer 14
Other 11,998
Total expenses 998,645
Fees waived or expenses reimbursed by Investment Manager and its affiliates (154,023)
Expense reduction (20)
Total net expenses 844,602
Net investment loss (530,341)
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 3,359,951
Investments — affiliated issuers (38)
Foreign currency translations 4,818
Forward foreign currency exchange contracts (363,589)
Net realized gain 3,001,142
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers 5,352,272
Foreign currency translations (29)
Forward foreign currency exchange contracts (84,562)
Net change in unrealized appreciation (depreciation) 5,267,681
Net realized and unrealized gain 8,268,823
Net increase in net assets resulting from operations $7,738,482
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Select Global Growth Fund  | Annual Report 2020

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment loss $(530,341) $(660,287)
Net realized gain (loss) 3,001,142 (868,337)
Net change in unrealized appreciation (depreciation) 5,267,681 (2,618,331)
Net increase (decrease) in net assets resulting from operations 7,738,482 (4,146,955)
Distributions to shareholders    
Net investment income and net realized gains    
Class A (891,478) (423,326)
Advisor Class (68,944) (28,921)
Class C (230,837) (138,792)
Institutional Class (617,992) (268,712)
Institutional 2 Class (15,205) (7,040)
Institutional 3 Class (107,639) (59,867)
Class R (24,567) (10,481)
Total distributions to shareholders (1,956,662) (937,139)
Increase (decrease) in net assets from capital stock activity (12,364,347) 7,274,607
Total increase (decrease) in net assets (6,582,527) 2,190,513
Net assets at beginning of year 69,736,763 67,546,250
Net assets at end of year $63,154,236 $69,736,763
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Global Growth Fund  | Annual Report 2020
15

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 143,915 2,286,710 983,343 15,734,358
Distributions reinvested 50,916 848,765 29,579 403,233
Redemptions (383,974) (6,174,055) (878,204) (13,747,889)
Net increase (decrease) (189,143) (3,038,580) 134,718 2,389,702
Advisor Class        
Subscriptions 46,127 752,305 83,522 1,267,634
Distributions reinvested 4,022 68,854 2,044 28,885
Redemptions (76,781) (1,243,610) (160,653) (2,614,768)
Net decrease (26,632) (422,451) (75,087) (1,318,249)
Class C        
Subscriptions 30,406 450,694 138,157 2,098,462
Distributions reinvested 14,480 222,417 10,422 132,600
Redemptions (194,133) (2,854,213) (309,247) (4,468,074)
Net decrease (149,247) (2,181,102) (160,668) (2,237,012)
Institutional Class        
Subscriptions 232,089 3,802,093 832,225 13,083,574
Distributions reinvested 32,255 552,530 17,575 243,368
Redemptions (581,767) (9,476,570) (367,086) (5,615,850)
Net increase (decrease) (317,423) (5,121,947) 482,714 7,711,092
Institutional 2 Class        
Subscriptions 26,308 429,639 31,966 540,045
Distributions reinvested 880 15,115 500 7,004
Redemptions (13,559) (226,379) (29,151) (453,364)
Net increase 13,629 218,375 3,315 93,685
Institutional 3 Class        
Subscriptions 25,389 414,100 130,022 2,126,582
Distributions reinvested 6,236 106,207 4,348 59,826
Redemptions (125,193) (2,049,857) (112,257) (1,760,265)
Net increase (decrease) (93,568) (1,529,550) 22,113 426,143
Class R        
Subscriptions 8,802 141,159 20,515 308,630
Distributions reinvested 1,505 24,419 792 10,421
Redemptions (28,217) (454,670) (8,536) (109,805)
Net increase (decrease) (17,910) (289,092) 12,771 209,246
Total net increase (decrease) (780,294) (12,364,347) 419,876 7,274,607
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Select Global Growth Fund  | Annual Report 2020

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Columbia Select Global Growth Fund  | Annual Report 2020
17

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $15.10 (0.13) 1.98 1.85 (0.50) (0.50)
Year Ended 2/28/2019 $16.17 (0.14) (0.73) (0.87) (0.20) (0.20)
Year Ended 2/28/2018 $12.44 (0.12) 3.85 3.73
Year Ended 2/28/2017 $11.14 (0.10) 2.16 2.06 (0.76) (0.76)
Year Ended 2/29/2016 $13.58 (0.09) (2.12) (2.21) (0.23) (0.23)
Advisor Class
Year Ended 2/29/2020 $15.47 (0.10) 2.03 1.93 (0.50) (0.50)
Year Ended 2/28/2019 $16.52 (0.10) (0.75) (0.85) (0.20) (0.20)
Year Ended 2/28/2018 $12.67 (0.10) 3.95 3.85
Year Ended 2/28/2017 $11.31 (0.07) 2.19 2.12 (0.76) (0.76)
Year Ended 2/29/2016 $13.75 (0.03) (2.18) (2.21) (0.23) (0.23)
Class C
Year Ended 2/29/2020 $14.03 (0.23) 1.83 1.60 (0.50) (0.50)
Year Ended 2/28/2019 $15.16 (0.24) (0.69) (0.93) (0.20) (0.20)
Year Ended 2/28/2018 $11.74 (0.21) 3.63 3.42
Year Ended 2/28/2017 $10.64 (0.18) 2.04 1.86 (0.76) (0.76)
Year Ended 2/29/2016 $13.07 (0.18) (2.02) (2.20) (0.23) (0.23)
Institutional Class
Year Ended 2/29/2020 $15.48 (0.09) 2.02 1.93 (0.50) (0.50)
Year Ended 2/28/2019 $16.52 (0.10) (0.74) (0.84) (0.20) (0.20)
Year Ended 2/28/2018 $12.67 (0.08) 3.93 3.85
Year Ended 2/28/2017 $11.31 (0.07) 2.19 2.12 (0.76) (0.76)
Year Ended 2/29/2016 $13.75 (0.05) (2.16) (2.21) (0.23) (0.23)
Institutional 2 Class
Year Ended 2/29/2020 $15.52 (0.09) 2.04 1.95 (0.50) (0.50)
Year Ended 2/28/2019 $16.57 (0.10) (0.75) (0.85) (0.20) (0.20)
Year Ended 2/28/2018 $12.70 (0.08) 3.95 3.87
Year Ended 2/28/2017 $11.33 (0.06) 2.19 2.13 (0.76) (0.76)
Year Ended 2/29/2016 $13.76 (0.06) (2.14) (2.20) (0.23) (0.23)
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Select Global Growth Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $16.45 12.22% 1.54%(c) 1.30%(c),(d) (0.83%) 20% $29,069
Year Ended 2/28/2019 $15.10 (5.21%) 1.60%(c) 1.37%(c) (0.90%) 46% $29,548
Year Ended 2/28/2018 $16.17 29.98% 1.67% 1.38%(d) (0.83%) 48% $29,457
Year Ended 2/28/2017 $12.44 18.89% 1.60% 1.42% (0.80%) 27% $35,911
Year Ended 2/29/2016 $11.14 (16.49%) 1.57% 1.47% (0.71%) 154% $40,252
Advisor Class
Year Ended 2/29/2020 $16.90 12.45% 1.29%(c) 1.05%(c),(d) (0.58%) 20% $2,271
Year Ended 2/28/2019 $15.47 (4.98%) 1.34%(c) 1.12%(c) (0.63%) 46% $2,491
Year Ended 2/28/2018 $16.52 30.39% 1.44% 1.13%(d) (0.65%) 48% $3,899
Year Ended 2/28/2017 $12.67 19.15% 1.35% 1.17% (0.53%) 27% $1,484
Year Ended 2/29/2016 $11.31 (16.28%) 1.32% 1.22% (0.26%) 154% $1,451
Class C
Year Ended 2/29/2020 $15.13 11.37% 2.29%(c) 2.06%(c),(d) (1.58%) 20% $6,850
Year Ended 2/28/2019 $14.03 (5.95%) 2.34%(c) 2.12%(c) (1.64%) 46% $8,448
Year Ended 2/28/2018 $15.16 29.13% 2.43% 2.13%(d) (1.58%) 48% $11,558
Year Ended 2/28/2017 $11.74 17.86% 2.35% 2.17% (1.55%) 27% $10,718
Year Ended 2/29/2016 $10.64 (17.06%) 2.32% 2.22% (1.45%) 154% $13,111
Institutional Class
Year Ended 2/29/2020 $16.91 12.44% 1.29%(c) 1.05%(c),(d) (0.58%) 20% $20,552
Year Ended 2/28/2019 $15.48 (4.91%) 1.35%(c) 1.12%(c) (0.65%) 46% $23,722
Year Ended 2/28/2018 $16.52 30.39% 1.44% 1.13%(d) (0.58%) 48% $17,349
Year Ended 2/28/2017 $12.67 19.14% 1.35% 1.17% (0.57%) 27% $6,079
Year Ended 2/29/2016 $11.31 (16.29%) 1.32% 1.22% (0.39%) 154% $5,950
Institutional 2 Class
Year Ended 2/29/2020 $16.97 12.54% 1.23%(c) 1.00%(c) (0.53%) 20% $543
Year Ended 2/28/2019 $15.52 (4.96%) 1.28%(c) 1.08%(c) (0.60%) 46% $285
Year Ended 2/28/2018 $16.57 30.47% 1.37% 1.09% (0.54%) 48% $249
Year Ended 2/28/2017 $12.70 19.20% 1.26% 1.10% (0.48%) 27% $223
Year Ended 2/29/2016 $11.33 (16.20%) 1.21% 1.14% (0.47%) 154% $194
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Global Growth Fund  | Annual Report 2020
19

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
(loss)
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
realized
gains
Total
distributions to
shareholders
Institutional 3 Class
Year Ended 2/29/2020 $15.38 (0.08) 2.02 1.94 (0.50) (0.50)
Year Ended 2/28/2019 $16.41 (0.09) (0.74) (0.83) (0.20) (0.20)
Year Ended 2/28/2018(e) $12.70 (0.11) 3.82 3.71
Class R
Year Ended 2/29/2020 $14.75 (0.17) 1.93 1.76 (0.50) (0.50)
Year Ended 2/28/2019 $15.83 (0.17) (0.71) (0.88) (0.20) (0.20)
Year Ended 2/28/2018 $12.21 (0.15) 3.77 3.62
Year Ended 2/28/2017 $10.97 (0.13) 2.13 2.00 (0.76) (0.76)
Year Ended 2/29/2016 $13.41 (0.12) (2.09) (2.21) (0.23) (0.23)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) Ratios include interfund lending expense which is less than 0.01%.
(d) The benefits derived from expense reductions had an impact of less than 0.01%.
(e) Institutional 3 Class shares commenced operations on March 1, 2017. Per share data and total return reflect activity from that date.
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Select Global Growth Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income (loss)
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Institutional 3 Class
Year Ended 2/29/2020 $16.82 12.59% 1.18%(c) 0.94%(c) (0.46%) 20% $3,365
Year Ended 2/28/2019 $15.38 (4.89%) 1.23%(c) 1.02%(c) (0.55%) 46% $4,516
Year Ended 2/28/2018(e) $16.41 29.21% 1.32% 1.03% (0.71%) 48% $4,454
Class R
Year Ended 2/29/2020 $16.01 11.90% 1.80%(c) 1.55%(c),(d) (1.09%) 20% $504
Year Ended 2/28/2019 $14.75 (5.38%) 1.85%(c) 1.62%(c) (1.16%) 46% $728
Year Ended 2/28/2018 $15.83 29.65% 1.93% 1.63%(d) (1.08%) 48% $580
Year Ended 2/28/2017 $12.21 18.63% 1.85% 1.67% (1.08%) 27% $647
Year Ended 2/29/2016 $10.97 (16.70%) 1.82% 1.72% (0.93%) 154% $543
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Select Global Growth Fund  | Annual Report 2020
21

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Select Global Growth Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A and Class C shares are offered to the general public for investment. Class C shares automatically convert to Class A shares after 10 years. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
22 Columbia Select Global Growth Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Forward foreign currency exchange contracts are marked-to-market based upon foreign currency exchange rates provided by a pricing service.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Foreign currency transactions and translations
The values of all assets and liabilities denominated in foreign currencies are generally translated into U.S. dollars at exchange rates determined at the close of regular trading on the New York Stock Exchange. Net realized and unrealized gains (losses) on foreign currency transactions and translations include gains (losses) arising from the fluctuation in exchange rates between trade and settlement dates on securities transactions, gains (losses) arising from the disposition of foreign currency and currency gains (losses) between the accrual and payment dates on dividends, interest income and foreign withholding taxes.
For financial statement purposes, the Fund does not distinguish that portion of gains (losses) on investments which is due to changes in foreign exchange rates from that which is due to changes in market prices of the investments. Such fluctuations are included with the net realized and unrealized gains (losses) on investments in the Statement of Operations.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
Columbia Select Global Growth Fund  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Forward foreign currency exchange contracts
Forward foreign currency exchange contracts are over-the-counter agreements between two parties to buy and sell a currency at a set price on a future date. The Fund utilized forward foreign currency exchange contracts to hedge the currency exposure associated with some or all of the Fund’s securities. These instruments may be used for other purposes in future periods.
The values of forward foreign currency exchange contracts fluctuate daily with changes in foreign currency exchange rates. Changes in the value of these contracts are recorded as unrealized appreciation or depreciation until the contract is exercised or has expired. The Fund will realize a gain or loss when the forward foreign currency exchange contract is closed or expires. Non-deliverable forward foreign currency exchange contracts are settled with the counterparty in U.S. dollars without delivery of foreign currency.
The use of forward foreign currency exchange contracts does not eliminate fluctuations in the prices of the Fund’s portfolio securities. The risks of forward foreign currency exchange contracts include movement in the values of the foreign currencies relative to the U.S. dollar (or other foreign currencies) and the possibility that counterparties will not complete their contractual obligations, which may be in excess of the amount reflected, if any, in the Statement of Assets and Liabilities.
24 Columbia Select Global Growth Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Asset derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Foreign exchange risk Unrealized appreciation on forward foreign currency exchange contracts 10,935
    
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Foreign exchange risk Unrealized depreciation on forward foreign currency exchange contracts 124,216
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category           Forward
foreign
currency
exchange
contracts
($)
Foreign exchange risk           (363,589)
 
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category           Forward
foreign
currency
exchange
contracts
($)
Foreign exchange risk           (84,562)
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average unrealized
appreciation ($)*
Average unrealized
depreciation ($)*
Forward foreign currency exchange contracts 11,591 (112,191)
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
Columbia Select Global Growth Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
Offsetting of assets and liabilities
The following table presents the Fund’s gross and net amount of assets and liabilities available for offset under netting arrangements as well as any related collateral received or pledged by the Fund as of February 29, 2020:
  Morgan
Stanley ($)
Assets  
Forward foreign currency exchange contracts 10,935
Liabilities  
Forward foreign currency exchange contracts 124,216
Total financial and derivative net assets (113,281)
Total collateral received (pledged) (a) -
Net amount (b) (113,281)
    
(a) In some instances, the actual collateral received and/or pledged may be more than the amount shown due to overcollateralization.
(b) Represents the net amount due from/(to) counterparties in the event of default.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
26 Columbia Select Global Growth Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Foreign taxes
The Fund may be subject to foreign taxes on income, gains on investments or currency repatriation, a portion of which may be recoverable. The Fund will accrue such taxes and recoveries, as applicable, based upon its current interpretation of tax rules and regulations that exist in the markets in which it invests.
Realized gains in certain countries may be subject to foreign taxes at the Fund level, based on statutory rates. The Fund accrues for such foreign taxes on realized and unrealized gains at the appropriate rate for each jurisdiction, as applicable. The amount, if any, is disclosed as a liability on the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.87% to 0.67% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.87% of the Fund’s average daily net assets.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
Columbia Select Global Growth Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.12
Advisor Class 0.12
Class C 0.12
Institutional Class 0.12
Institutional 2 Class 0.07
Institutional 3 Class 0.01
Class R 0.12
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $20.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
28 Columbia Select Global Growth Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class C shares of the Fund and a monthly distribution fee to the Distributor at the maximum annual rates of 0.75% and 0.50% of the average daily net assets attributable to Class C and Class R shares of the Fund, respectively.
Sales charges (unaudited)
Sales charges, including front-end charges and contingent deferred sales charges (CDSCs), received by the Distributor for distributing Fund shares for the year ended February 29, 2020, if any, are listed below:
  Front End (%) CDSC (%) Amount ($)
Class A 5.75 0.50 - 1.00(a) 31,646
Class C 1.00(b) 195
    
(a) This charge is imposed on certain investments of between $1 million and $50 million redeemed within 18 months after purchase, as follows: 1.00% if redeemed within 12 months after purchase, and 0.50% if redeemed more than 12, but less than 18, months after purchase, with certain limited exceptions.
(b) This charge applies to redemptions within 12 months after purchase, with certain limited exceptions.
The Fund’s other share classes are not subject to sales charges.
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 1.28% 1.37%
Advisor Class 1.03 1.12
Class C 2.03 2.12
Institutional Class 1.03 1.12
Institutional 2 Class 0.97 1.07
Institutional 3 Class 0.91 1.01
Class R 1.53 1.62
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
Columbia Select Global Growth Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, late-year ordinary losses, net operating loss reclassification, and foreign currency transactions. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Excess of distributions
over net investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
446,159 358,772 (804,931)
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by these reclassifications.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
1,956,662 1,956,662 937,139 937,139
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
285,643 21,543,727
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
41,796,474 22,695,992 (1,152,265) 21,543,727
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Under current tax rules, regulated investment companies can elect to treat certain late-year ordinary losses incurred and post-October capital losses (capital losses realized after October 31) as arising on the first day of the following taxable year. As of February 29, 2020, the Fund will elect to treat the following late-year ordinary losses and post-October capital losses as arising on March 1, 2020.
Late year
ordinary losses ($)
Post-October
capital losses ($)
271,924
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
30 Columbia Select Global Growth Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $12,882,179 and $24,373,355, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund’s activity in the Interfund Program during the year ended February 29, 2020 was as follows:
Borrower or lender Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Borrower 1,083,333 2.95 6
Interest expense incurred by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at February 29, 2020.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Columbia Select Global Growth Fund  | Annual Report 2020
31

Notes to Financial Statements  (continued)
February 29, 2020
Note 9. Significant risks
Consumer discretionary sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the consumer discretionary sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the consumer discretionary sector are subject to certain risks, including fluctuations in the performance of the overall domestic and international economy, interest rate changes, increased competition and consumer confidence. Performance of such companies may be affected by factors including reduced disposable household income, reduced consumer spending, changing demographics and consumer tastes.
Foreign securities and emerging market countries risk
Investing in foreign securities may involve certain risks not typically associated with investing in U.S. securities, such as increased currency volatility and risks associated with political, regulatory, economic, social, diplomatic and other conditions or events occurring in the country or region, which may result in significant market volatility. In addition, certain foreign securities may not be as liquid as U.S. securities. Investing in emerging markets may increase these risks and expose the Fund to elevated risks associated with increased inflation, deflation or currency devaluation. To the extent that the Fund concentrates its investment exposure to any one or a few specific countries, the Fund will be particularly susceptible to the risks associated with the conditions, events or other factors impacting those countries or regions and may, therefore, have a greater risk than that of a fund that is more geographically diversified.
Health care sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the health care sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the health care sector are subject to certain risks, including restrictions on government reimbursement for medical expenses, government approval of medical products and services, competitive pricing pressures, and the rising cost of medical products and services (especially for companies dependent upon a relatively limited number of products or services). Performance of such companies may be affected by factors including, government regulation, obtaining and protecting patents (or the failure to do so), product liability and other similar litigation as well as product obsolescence.
Information technology sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the information technology sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the information technology sectors are subject to certain risks, including the risk that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. Performance of such companies may be affected by factors including obtaining and protecting patents (or the failure to do so) and significant competitive pressures, including aggressive pricing of their products or services, new market entrants, competition for market share and short product cycles due to an accelerated rate of technological developments. Such competitive pressures may lead to limited earnings and/or falling profit margins. As a result, the value of their securities may fall or fail to rise. In addition, many information technology sector companies have limited operating histories and prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events
32 Columbia Select Global Growth Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems, governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Shareholder concentration risk
At February 29, 2020, affiliated shareholders of record owned 59.6% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued. Other than as noted below, there were no items requiring adjustment of the financial statements or additional disclosure.
In February 2020, the Board of Trustees approved an Agreement and Plan of Reorganization to reorganize Columbia Select Global Growth Fund with and into Columbia Select Global Equity Fund. Pursuant to applicable law (including the 1940 Act) the reorganization may be implemented without shareholder approval. The reorganization is expected to occur in the third quarter of 2020 and is expected to be a tax-free reorganization for U.S. federal income tax purposes.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and
Columbia Select Global Growth Fund  | Annual Report 2020
33

Notes to Financial Statements  (continued)
February 29, 2020
that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
34 Columbia Select Global Growth Fund  | Annual Report 2020

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Select Global Growth Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Select Global Growth Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
Columbia Select Global Growth Fund  | Annual Report 2020
35

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Capital
gain
dividend
 
$2,354,420  
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
36 Columbia Select Global Growth Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Columbia Select Global Growth Fund  | Annual Report 2020
37

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
38 Columbia Select Global Growth Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Columbia Select Global Growth Fund  | Annual Report 2020
39

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
40 Columbia Select Global Growth Fund  | Annual Report 2020

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Columbia Select Global Growth Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN187_02_K01_(04/20)
Annual Report
February 29, 2020
Columbia Large Cap Enhanced Core Fund
Beginning on January 1, 2021, as permitted by regulations adopted by the Securities and Exchange Commission, paper copies of the Fund’s annual and semiannual shareholder reports like this one will no longer be sent by mail, unless you specifically request paper copies of the reports. Instead, the reports will be made available on the Fund’s website (columbiathreadneedleus.com/investor/), and each time a report is posted you will be notified by mail and provided with a website address to access the report.
If you have already elected to receive shareholder reports electronically, you will not be affected by this change and you need not take any action. You may elect to receive shareholder reports and other communications from the Fund electronically at any time by contacting your financial intermediary (such as a broker-dealer or bank) or, for Fund shares held directly with the Fund, by calling 800.345.6611 or by enrolling in “eDelivery” by logging into your account at columbiathreadneedleus.com/investor/.
You may elect to receive all future reports in paper free of charge. If you invest through a financial intermediary, you can contact your financial intermediary to request that you continue receiving paper copies of your shareholder reports. If you invest directly with the Fund, you can call 800.345.6611 to let the Fund know you wish to continue receiving paper copies of your shareholder reports. Your election to receive paper reports will apply to all Columbia Funds held in your account if you invest through a financial intermediary or all Columbia Funds held with the fund complex if you invest directly with the Fund.
Not FDIC Insured • No bank guarantee • May lose value

Table of Contents
Columbia Large Cap Enhanced Core Fund (the Fund) mails one shareholder report to each shareholder address, unless such shareholder elected to receive shareholder reports from the Fund electronically. If you would like more than one report, please call shareholder services at 800.345.6611 and additional reports will be sent to you.
Proxy voting policies and procedures
The policy of the Board of Trustees is to vote the proxies of the companies in which the Fund holds investments consistent with the procedures as stated in the Statement of Additional Information (SAI). You may obtain a copy of the SAI without charge by calling 800.345.6611; contacting your financial intermediary; visiting columbiathreadneedleus.com/investor/; or searching the website of the Securities and Exchange Commission (SEC) at sec.gov. Information regarding how the Fund voted proxies relating to portfolio securities is filed with the SEC by August 31st for the most recent 12-month period ending June 30th of that year, and is available without charge by visiting columbiathreadneedleus.com/investor/, or searching the website of the SEC at sec.gov.
Quarterly schedule of investments
The Fund files a complete schedule of portfolio holdings with the SEC for the first and third quarters of each fiscal year on Form N-PORT, and for reporting periods ended prior to March 31, 2019, on Form N-Q. The Fund’s Form N-Q and Form N-PORT filings are available on the SEC’s website at sec.gov. The Fund’s complete schedule of portfolio holdings, as filed on Form N-Q or Form N-PORT, can also be obtained without charge, upon request, by calling 800.345.6611.
Additional Fund information
For more information about the Fund, please visit columbiathreadneedleus.com/investor/ or call 800.345.6611. Customer Service Representatives are available to answer your questions Monday through Friday from 8 a.m. to 7 p.m. Eastern time.
Fund investment manager
Columbia Management Investment Advisers, LLC (the Investment Manager)
225 Franklin Street
Boston, MA 02110
Fund distributor
Columbia Management Investment Distributors, Inc.
225 Franklin Street
Boston, MA 02110
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Large Cap Enhanced Core Fund  |  Annual Report 2020

Fund at a Glance
Investment objective
The Fund seeks total return before fees and expenses that exceeds the total return of the Standard & Poor’s (S&P) 500 Index.
Portfolio management
Brian Condon, CFA*
Co-Portfolio Manager
Managed Fund since 2009
* Brian Condon has announced that he plans to retire from the Investment Manager, on May 31, 2020. Until then, Mr. Condon will continue to serve as a Co-Portfolio Manager of the Fund.
Peter Albanese
Co-Portfolio Manager
Managed Fund since 2014
Raghavendran Sivaraman, Ph.D., CFA
Co-Portfolio Manager
Managed Fund since December 2019
Morningstar style boxTM
The Morningstar Style Box is based on a fund’s portfolio holdings. For equity funds, the vertical axis shows the market capitalization of the stocks owned, and the horizontal axis shows investment style (value, blend, or growth). Information shown is based on the most recent data provided by Morningstar.
© 2020 Morningstar, Inc. All rights reserved. The Morningstar information contained herein: (1) is proprietary to Morningstar and/or its content providers; (2) may not be copied or distributed; and (3) is not warranted to be accurate, complete or timely. Neither Morningstar nor its content providers are responsible for any damages or losses arising from any use of this information.
Average annual total returns (%) (for the period ended February 29, 2020)
    Inception 1 Year 5 Years 10 Years
Class A 07/31/96 2.33 7.35 12.09
Advisor Class* 07/01/15 2.60 7.60 12.23
Institutional Class 07/31/96 2.58 7.61 12.38
Institutional 2 Class* 06/25/14 2.66 7.72 12.32
Institutional 3 Class 07/15/09 2.73 7.77 12.53
Class R 01/23/06 2.04 7.08 11.82
S&P 500 Index   8.19 9.23 12.65
All results shown assume reinvestment of distributions during the period. Returns do not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares. Performance results reflect the effect of any fee waivers or reimbursements of Fund expenses by Columbia Management Investment Advisers, LLC and/or any of its affiliates. Absent these fee waivers or expense reimbursement arrangements, performance results would have been lower.
The performance information shown represents past performance and is not a guarantee of future results. The investment return and principal value of your investment will fluctuate so that your shares, when redeemed, may be worth more or less than their original cost. Current performance may be lower or higher than the performance information shown. You may obtain performance information current to the most recent month-end by contacting your financial intermediary, visiting columbiathreadneedleus.com/investor/ or calling 800.345.6611.
* The returns shown for periods prior to the share class inception date (including returns for the Life of the Fund, if shown, which are since Fund inception) include the returns of the Fund’s oldest share class. Since the Fund launched more than one share class at its inception, Class A shares were used. These returns are adjusted to reflect any higher class-related operating expenses of the newer share classes, as applicable. Please visit columbiathreadneedleus.com/investor/investment-products/mutual-funds/appended-performance for more information.
The S&P 500 Index, an unmanaged index, measures the performance of 500 widely held, large-capitalization U.S. stocks and is frequently used as a general measure of market performance.
Indices are not available for investment, are not professionally managed and do not reflect sales charges, fees, brokerage commissions, taxes or other expenses of investing. Securities in the Fund may not match those in an index.
Fund performance may be significantly negatively impacted by the economic impact of the COVID-19 pandemic. The COVID-19 pandemic has adversely impacted economies and capital markets around the world in ways that will likely continue and may change in unforeseen ways for an indeterminate period. The COVID-19 pandemic may exacerbate pre-existing political, social and economic risks in certain countries and globally.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
3

Fund at a Glance   (continued)
Performance of a hypothetical $10,000 investment (February 28, 2010 — February 29, 2020)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Large Cap Enhanced Core Fund during the stated time period, and does not reflect the deduction of taxes that a shareholder may pay on Fund distributions or on the redemption of Fund shares.
Portfolio breakdown (%) (at February 29, 2020)
Common Stocks 99.0
Money Market Funds 1.0
Total 100.0
Percentages indicated are based upon total investments excluding investments in derivatives, if any. The Fund’s portfolio composition is subject to change.
Equity sector breakdown (%) (at February 29, 2020)
Communication Services 11.2
Consumer Discretionary 9.6
Consumer Staples 7.5
Energy 3.7
Financials 11.9
Health Care 14.6
Industrials 8.6
Information Technology 24.7
Materials 2.0
Real Estate 2.8
Utilities 3.4
Total 100.0
Percentages indicated are based upon total equity investments. The Fund’s portfolio composition is subject to change.
 
4 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Manager Discussion of Fund Performance
For the 12-month period that ended February 29, 2020, the Fund’s Class A shares returned 2.33%, underperforming its benchmark, the S&P 500 Index, which returned 8.19%. The Fund’s strategy is to keep sector weights generally in line with the benchmark, so relative performance was primarily driven by stock selection. During the period, the Fund outperformed the benchmark in the communication services sector. Consumer discretionary, financials and consumer staples sectors were the biggest areas of detraction for the Fund.
Global uncertainty cut into strong stock market gains, solid economic growth
Optimism prevailed early in 2019, buoyed by solid economic growth and a recovery from meaningful stock market losses in 2018. Strong job gains drove the unemployment rate down to 3.5%. Consumer spending and export trade supported U.S. economic growth. However, the pace of growth slowed to an estimated 2.1% for the year. In Europe, economic growth slowed as trade tensions and uncertainty mounted regarding Brexit (the U.K.’s departure from the European Union), which was finally resolved late in the year. At the same time, emerging markets came under pressure, driven by trade and tariff concerns. China’s economic conditions weakened and the spread of the coronavirus introduced enough global uncertainty to drive stock markets around the world down sharply in the final week of the period, raising concerns about the impact on global economic growth going forward.
Against this backdrop, the S&P 500 Index returned 8.19% for the 12-month period, giving up substantial gains during the last few trading days of February. The Bloomberg Barclays U.S. Aggregate Bond Index gained 11.68%, as the yield on the 10-year U.S. Treasury fell to 1.10%. (Bond yields and prices move in opposite directions.)
Stock selection models delivered mixed results
We divide the metrics for our stock selection model into three broad categories: value (fundamental measures, such as earnings and cash flow, relative to market values), catalyst (price momentum and business momentum) and quality (quality of earnings and financial strength). We then rank the securities within a sector/industry from 1 (most attractive) to 5 (least attractive) based upon the metrics within these categories. For the period, the Fund’s quality factors were the best performing category while the catalyst and value themes fell short of expectations. Many of the factors favored by the Fund’s value and quality themes were out of favor during the period.
The value component of the Fund’s systematic framework remained ineffectual for most of 2019, during which conservative market sentiment was reflected in depressed yields and sustained rallies in bullion markets. The value component was least effective in the consumer discretionary and real estate sectors. A high level of consumer spending inflated consumer discretionary stock prices relative to our quantitative measures of valuation. The real estate sector generally followed these same investor trends for the period. During the year, the Fund’s quantitative measure of quality became increasingly connected to proxies of value, which helped explain challenges in certain industry groups, including technology hardware and industrial services. In the technology hardware industry, overweight exposure to Cisco Systems, Inc. and an underweight in Apple, Inc. detracted from results.
Contributors and detractors
The Fund outperformed the benchmark return in the communication services sector. Lam Research Corp., Exxon Mobil Corp. and Qorvo, Inc. were top individual contributors. Investors continued to be attracted to semiconductor capital equipment company Lam Research for the high-growth potential associated with the chip memory market. The company has been aggressive in buying back its shares, and it pays a modest dividend. Qorvo has benefited from its positioning in mobile phones. But even as the coronavirus-led supply chain disruption in smartphones has hurt that end market, the company remains strong in defense and connectivity applications, such as the advance of 5G, the fifth generation of wireless technology. We exited the Fund’s position in Qorvo, taking profits. The Fund was underweight in integrated energy producer Exxon Mobil, which also aided relative results for the period.
Underperformance in the consumer discretionary, financials and consumer staples sectors were the biggest detractors from relative performance for the period. In the energy sector, an overweight in Marathon Oil Corp. weighed on results. In the consumer discretionary sector, an overweight in Under Armour, Inc. detracted from relative returns. An overweight in Walgreens Boots Alliance, Inc. hampered returns in the consumer staples sector. Shares of Houston-based Marathon Oil dropped as oil prices plunged. The company made a significant cut to its 2020 capital spending budget. Athletic brand Under
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
5

Manager Discussion of Fund Performance  (continued)
Armour has struggled to boost sluggish sales, particularly in the United States, its largest market. In November, the company confirmed that the U.S. Securities and Exchange Commission and the Justice Department were investigating its accounting methods, which was a further drag on performance. Walgreens Boots Alliance struggled throughout the period and missed both revenue and earnings estimates in the first quarter of 2020, which disappointed investors and drove shares downward.
Investment discipline based on stock selection model
Regardless of the economic environment, we maintain our investment discipline, which is linked to the Fund’s quantitative stock selection model. Consequently, we do not rely on macroeconomic scenarios or market outlooks to choose securities. We also seek to minimize sector weight differences between the Fund and its investment benchmark. We continue to favor stocks of companies with attributes considered most important in our quantitative stock selection model — companies with attractive valuations relative to their peers, strong business and market momentum and good quality of earnings and financial strength. Over the long term, we have found that stocks with these characteristics have had the potential to outperform their peers in various macroeconomic conditions.
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Investing in derivatives is a specialized activity that involves special risks, which may result in significant losses. The Fund’s net value will generally decline when the performance of its targeted index declines. See the Fund’s prospectus for more information on these and other risks.
The views expressed in this report reflect the current views of the respective parties. These views are not guarantees of future performance and involve certain risks, uncertainties and assumptions that are difficult to predict, so actual outcomes and results may differ significantly from the views expressed. These views are subject to change at any time based upon economic, market or other conditions and the respective parties disclaim any responsibility to update such views. These views may not be relied on as investment advice and, because investment decisions for a Columbia fund are based on numerous factors, may not be relied on as an indication of trading intent on behalf of any particular Columbia fund. References to specific securities should not be construed as a recommendation or investment advice.
6 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Understanding Your Fund’s Expenses
(Unaudited)
As an investor, you incur two types of costs. There are shareholder transaction costs, which may include redemption fees. There are also ongoing fund costs, which generally include management fees, distribution and/or service fees, and other fund expenses. The following information is intended to help you understand your ongoing costs (in dollars) of investing in the Fund and to help you compare these costs with the ongoing costs of investing in other mutual funds.
Analyzing your Fund’s expenses
To illustrate these ongoing costs, we have provided examples and calculated the expenses paid by investors in each share class of the Fund during the period. The actual and hypothetical information in the table is based on an initial investment of $1,000 at the beginning of the period indicated and held for the entire period. Expense information is calculated two ways and each method provides you with different information. The amount listed in the “Actual” column is calculated using the Fund’s actual operating expenses and total return for the period. You may use the Actual information, together with the amount invested, to estimate the expenses that you paid over the period. Simply divide your account value by $1,000 (for example, an $8,600 account value divided by $1,000 = 8.6), then multiply the results by the expenses paid during the period under the “Actual” column. The amount listed in the “Hypothetical” column assumes a 5% annual rate of return before expenses (which is not the Fund’s actual return) and then applies the Fund’s actual expense ratio for the period to the hypothetical return. You should not use the hypothetical account values and expenses to estimate either your actual account balance at the end of the period or the expenses you paid during the period. See “Compare with other funds” below for details on how to use the hypothetical data.
Compare with other funds
Since all mutual funds are required to include the same hypothetical calculations about expenses in shareholder reports, you can use this information to compare the ongoing cost of investing in the Fund with other funds. To do so, compare the hypothetical example with the 5% hypothetical examples that appear in the shareholder reports of other funds. As you compare hypothetical examples of other funds, it is important to note that hypothetical examples are meant to highlight the ongoing costs of investing in a fund only and do not reflect any transaction costs, such as redemption or exchange fees. Therefore, the hypothetical calculations are useful in comparing ongoing costs only, and will not help you determine the relative total costs of owning different funds. If transaction costs were included in these calculations, your costs would be higher.
September 1, 2019 — February 29, 2020
  Account value at the
beginning of the
period ($)
Account value at the
end of the
period ($)
Expenses paid during
the period ($)
Fund’s annualized
expense ratio (%)
  Actual Hypothetical Actual Hypothetical Actual Hypothetical Actual
Class A 1,000.00 1,000.00 1,015.90 1,020.49 4.41 4.42 0.88
Advisor Class 1,000.00 1,000.00 1,017.70 1,021.73 3.16 3.17 0.63
Institutional Class 1,000.00 1,000.00 1,017.50 1,021.73 3.16 3.17 0.63
Institutional 2 Class 1,000.00 1,000.00 1,017.90 1,022.18 2.71 2.72 0.54
Institutional 3 Class 1,000.00 1,000.00 1,018.20 1,022.43 2.46 2.46 0.49
Class R 1,000.00 1,000.00 1,014.80 1,019.24 5.66 5.67 1.13
Expenses paid during the period are equal to the annualized expense ratio for each class as indicated above, multiplied by the average account value over the period and then multiplied by the number of days in the Fund’s most recent fiscal half year and divided by 366.
Expenses do not include fees and expenses incurred indirectly by the Fund from its investment in underlying funds, including affiliated and non-affiliated pooled investment vehicles, such as mutual funds and exchange-traded funds.
Had Columbia Management Investment Advisers, LLC and/or certain of its affiliates not waived/reimbursed certain fees and expenses, account value at the end of the period would have been reduced.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
7

Portfolio of Investments
February 29, 2020
(Percentages represent value of investments compared to net assets)
Investments in securities
Common Stocks 98.9%
Issuer Shares Value ($)
Communication Services 11.0%
Diversified Telecommunication Services 3.0%
AT&T, Inc. 170,100 5,990,922
Verizon Communications, Inc. 113,300 6,136,328
Total   12,127,250
Entertainment 1.3%
Electronic Arts, Inc.(a) 31,500 3,193,155
Take-Two Interactive Software, Inc.(a) 10,400 1,117,792
Walt Disney Co. (The) 8,700 1,023,555
Total   5,334,502
Interactive Media & Services 6.6%
Alphabet, Inc., Class A(a) 11,920 15,963,860
Facebook, Inc., Class A(a) 54,600 10,508,862
Total   26,472,722
Media 0.1%
Comcast Corp., Class A 12,600 509,418
Total Communication Services 44,443,892
Consumer Discretionary 9.5%
Distributors 0.6%
LKQ Corp.(a) 82,900 2,452,182
Diversified Consumer Services 0.2%
H&R Block, Inc. 42,600 880,542
Hotels, Restaurants & Leisure 1.0%
Hilton Worldwide Holdings, Inc. 16,700 1,623,240
MGM Resorts International 100,300 2,463,368
Total   4,086,608
Household Durables 0.8%
PulteGroup, Inc. 77,000 3,095,400
Internet & Direct Marketing Retail 3.3%
Amazon.com, Inc.(a) 5,530 10,417,137
eBay, Inc. 84,000 2,909,760
Total   13,326,897
Multiline Retail 0.8%
Target Corp. 30,400 3,131,200
Common Stocks (continued)
Issuer Shares Value ($)
Specialty Retail 1.7%
AutoZone, Inc.(a) 2,525 2,607,088
Best Buy Co., Inc. 34,100 2,579,665
Home Depot, Inc. (The) 8,100 1,764,504
Total   6,951,257
Textiles, Apparel & Luxury Goods 1.1%
Hanesbrands, Inc. 169,200 2,240,208
Under Armour, Inc., Class A(a) 138,800 1,969,572
Total   4,209,780
Total Consumer Discretionary 38,133,866
Consumer Staples 7.4%
Beverages 0.2%
Coca-Cola Co. (The) 11,800 631,182
PepsiCo, Inc. 2,400 316,872
Total   948,054
Food & Staples Retailing 1.2%
Walgreens Boots Alliance, Inc. 60,700 2,777,632
Walmart, Inc. 19,100 2,056,688
Total   4,834,320
Food Products 1.2%
General Mills, Inc. 58,900 2,886,100
Hershey Co. (The) 13,900 2,001,461
Total   4,887,561
Household Products 2.6%
Kimberly-Clark Corp. 26,100 3,424,059
Procter & Gamble Co. (The) 63,300 7,167,459
Total   10,591,518
Tobacco 2.2%
Altria Group, Inc. 90,900 3,669,633
Philip Morris International, Inc. 60,900 4,985,883
Total   8,655,516
Total Consumer Staples 29,916,969
The accompanying Notes to Financial Statements are an integral part of this statement.
8 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Energy 3.6%
Oil, Gas & Consumable Fuels 3.6%
Chevron Corp. 56,400 5,264,376
ConocoPhillips Co. 68,100 3,297,402
Exxon Mobil Corp. 20,000 1,028,800
HollyFrontier Corp. 19,400 653,392
Marathon Oil Corp. 191,900 1,588,932
Valero Energy Corp. 41,600 2,756,000
Total   14,588,902
Total Energy 14,588,902
Financials 11.8%
Banks 4.2%
Bank of America Corp. 174,300 4,967,550
Citigroup, Inc. 75,500 4,791,230
JPMorgan Chase & Co. 61,400 7,129,154
Wells Fargo & Co. 3,300 134,805
Total   17,022,739
Capital Markets 3.5%
Bank of New York Mellon Corp. (The) 77,400 3,088,260
Intercontinental Exchange, Inc. 39,800 3,550,956
Moody’s Corp. 14,600 3,504,438
S&P Global, Inc. 14,500 3,855,695
Total   13,999,349
Consumer Finance 0.9%
Capital One Financial Corp. 37,900 3,345,054
Synchrony Financial 16,700 485,970
Total   3,831,024
Diversified Financial Services 1.0%
Berkshire Hathaway, Inc., Class B(a) 18,700 3,858,558
Insurance 2.2%
Allstate Corp. (The) 30,900 3,252,225
MetLife, Inc. 43,300 1,849,776
Prudential Financial, Inc. 30,200 2,278,590
Unum Group 64,400 1,501,164
Total   8,881,755
Total Financials 47,593,425
Common Stocks (continued)
Issuer Shares Value ($)
Health Care 14.4%
Biotechnology 2.4%
AbbVie, Inc. 36,500 3,128,415
Alexion Pharmaceuticals, Inc.(a) 15,500 1,457,465
Amgen, Inc. 2,300 459,379
Gilead Sciences, Inc. 14,800 1,026,528
Regeneron Pharmaceuticals, Inc.(a) 2,350 1,044,740
Vertex Pharmaceuticals, Inc.(a) 11,800 2,643,554
Total   9,760,081
Health Care Equipment & Supplies 3.2%
Dentsply Sirona, Inc. 52,600 2,590,024
Hologic, Inc.(a) 54,800 2,582,176
Medtronic PLC 45,700 4,600,619
STERIS PLC 20,500 3,251,710
Total   13,024,529
Health Care Providers & Services 2.7%
AmerisourceBergen Corp. 34,600 2,917,472
DaVita, Inc.(a) 40,700 3,159,134
Humana, Inc. 1,350 431,568
McKesson Corp. 22,100 3,090,906
UnitedHealth Group, Inc. 4,800 1,223,808
Total   10,822,888
Pharmaceuticals 6.1%
Bristol-Myers Squibb Co. 80,100 4,730,706
Eli Lilly & Co. 13,500 1,702,755
Johnson & Johnson 63,100 8,485,688
Merck & Co., Inc. 75,700 5,795,592
Mylan NV(a) 108,500 1,865,115
Perrigo Co. PLC 5,200 263,588
Pfizer, Inc. 46,600 1,557,372
Total   24,400,816
Total Health Care 58,008,314
Industrials 8.6%
Aerospace & Defense 1.1%
Huntington Ingalls Industries, Inc. 1,800 369,954
Lockheed Martin Corp. 11,100 4,105,557
Total   4,475,511
 
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
9

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Airlines 1.2%
Delta Air Lines, Inc. 49,200 2,269,596
Southwest Airlines Co. 56,600 2,614,354
Total   4,883,950
Building Products 0.7%
Masco Corp. 63,700 2,632,084
Commercial Services & Supplies 0.2%
Waste Management, Inc. 9,100 1,008,371
Electrical Equipment 1.6%
AMETEK, Inc. 32,800 2,820,800
Eaton Corp. PLC 38,500 3,492,720
Total   6,313,520
Industrial Conglomerates 0.6%
Honeywell International, Inc. 15,500 2,513,635
Machinery 2.4%
Cummins, Inc. 20,600 3,116,574
Illinois Tool Works, Inc. 21,500 3,607,270
Parker-Hannifin Corp. 15,500 2,863,935
Total   9,587,779
Road & Rail 0.8%
CSX Corp. 43,300 3,050,485
Total Industrials 34,465,335
Information Technology 24.4%
Communications Equipment 1.3%
Cisco Systems, Inc. 125,700 5,019,201
IT Services 4.5%
MasterCard, Inc., Class A 24,350 7,067,587
VeriSign, Inc.(a) 16,600 3,149,850
Visa, Inc., Class A 43,900 7,979,264
Total   18,196,701
Semiconductors & Semiconductor Equipment 4.6%
Broadcom, Inc. 16,450 4,484,599
Intel Corp. 115,500 6,412,560
Lam Research Corp. 12,400 3,638,532
QUALCOMM, Inc. 51,600 4,040,280
Total   18,575,971
Common Stocks (continued)
Issuer Shares Value ($)
Software 9.1%
Adobe, Inc.(a) 12,700 4,383,024
Autodesk, Inc.(a) 18,800 3,588,544
Cadence Design Systems, Inc.(a) 3,700 244,718
Fortinet, Inc.(a) 30,700 3,133,242
Intuit, Inc. 15,000 3,987,750
Microsoft Corp.(b) 131,600 21,320,516
Total   36,657,794
Technology Hardware, Storage & Peripherals 4.9%
Apple, Inc. 59,275 16,203,414
HP, Inc. 177,300 3,686,067
Total   19,889,481
Total Information Technology 98,339,148
Materials 2.0%
Chemicals 1.0%
Celanese Corp., Class A 25,200 2,362,248
CF Industries Holdings, Inc. 17,800 656,108
LyondellBasell Industries NV, Class A 15,900 1,136,214
Total   4,154,570
Containers & Packaging 0.4%
Packaging Corp. of America 15,900 1,440,858
Metals & Mining 0.6%
Nucor Corp. 57,000 2,356,950
Total Materials 7,952,378
Real Estate 2.8%
Equity Real Estate Investment Trusts (REITS) 2.8%
American Tower Corp. 20,500 4,649,400
Equity Residential 5,900 443,090
Mid-America Apartment Communities, Inc. 22,200 2,869,572
SBA Communications Corp. 12,800 3,393,152
Total   11,355,214
Total Real Estate 11,355,214
Utilities 3.4%
Electric Utilities 2.4%
Exelon Corp. 74,800 3,224,628
NRG Energy, Inc. 81,100 2,693,331
Southern Co. (The) 58,500 3,531,060
Total   9,449,019
 
The accompanying Notes to Financial Statements are an integral part of this statement.
10 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Portfolio of Investments  (continued)
February 29, 2020
Common Stocks (continued)
Issuer Shares Value ($)
Independent Power and Renewable Electricity Producers 0.7%
AES Corp. (The) 158,800 2,656,724
Multi-Utilities 0.3%
Sempra Energy 9,800 1,369,844
Total Utilities 13,475,587
Total Common Stocks
(Cost $310,819,199)
398,273,030
Money Market Funds 1.0%
  Shares Value ($)
Columbia Short-Term Cash Fund, 1.641%(c),(d) 3,972,793 3,972,793
Total Money Market Funds
(Cost $3,972,536)
3,972,793
Total Investments in Securities
(Cost: $314,791,735)
402,245,823
Other Assets & Liabilities, Net   219,061
Net Assets 402,464,884
 
At February 29, 2020, securities and/or cash totaling $453,628 were pledged as collateral.
Investments in derivatives
Long futures contracts
Description Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
S&P 500 Index E-mini 33 03/2020 USD 4,869,315 (425,034)
Notes to Portfolio of Investments
(a) Non-income producing investment.
(b) This security or a portion of this security has been pledged as collateral in connection with derivative contracts.
(c) The rate shown is the seven-day current annualized yield at February 29, 2020.
(d) As defined in the Investment Company Act of 1940, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. Holdings and transactions in these affiliated companies during the year ended February 29, 2020 are as follows:
    
Issuer Beginning
shares
Shares
purchased
Shares
sold
Ending
shares
Realized gain
(loss) —
affiliated
issuers ($)
Net change in
unrealized
appreciation
(depreciation) —
affiliated
issuers ($)
Dividends —
affiliated
issuers ($)
Value —
affiliated
issuers
at end of
period ($)
Columbia Short-Term Cash Fund, 1.641%
  19,546,020 120,285,089 (135,858,316) 3,972,793 707 257 206,897 3,972,793
Currency Legend
USD US Dollar
Fair value measurements
The Fund categorizes its fair value measurements according to a three-level hierarchy that maximizes the use of observable inputs and minimizes the use of unobservable inputs by prioritizing that the most observable input be used when available. Observable inputs are those that market participants would use in pricing an investment based on market data obtained from sources independent of the reporting entity. Unobservable inputs are those that reflect the Fund’s assumptions about the information market participants would use in pricing an investment. An investment’s level within the fair value hierarchy is based on the lowest level of any input that is deemed significant to the asset’s or liability’s fair value measurement. The input levels are not necessarily an indication of the risk or liquidity associated with investments at that level. For example, certain U.S. government securities are generally high quality and liquid, however, they are reflected as Level 2 because the inputs used to determine fair value may not always be quoted prices in an active market.
Fair value inputs are summarized in the three broad levels listed below:
Level 1 — Valuations based on quoted prices for investments in active markets that the Fund has the ability to access at the measurement date. Valuation adjustments are not applied to Level 1 investments.
Level 2 — Valuations based on other significant observable inputs (including quoted prices for similar securities, interest rates, prepayment speeds, credit risks, etc.).
Level 3 — Valuations based on significant unobservable inputs (including the Fund’s own assumptions and judgment in determining the fair value of investments).
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
11

Portfolio of Investments  (continued)
February 29, 2020
Fair value measurements  (continued)
Inputs that are used in determining fair value of an investment may include price information, credit data, volatility statistics, and other factors. These inputs can be either observable or unobservable. The availability of observable inputs can vary between investments, and is affected by various factors such as the type of investment, and the volume and level of activity for that investment or similar investments in the marketplace. The inputs will be considered by the Investment Manager, along with any other relevant factors in the calculation of an investment’s fair value. The Fund uses prices and inputs that are current as of the measurement date, which may include periods of market dislocations. During these periods, the availability of prices and inputs may be reduced for many investments. This condition could cause an investment to be reclassified between the various levels within the hierarchy.
Investments falling into the Level 3 category are primarily supported by quoted prices from brokers and dealers participating in the market for those investments. However, these may be classified as Level 3 investments due to lack of market transparency and corroboration to support these quoted prices. Additionally, valuation models may be used as the pricing source for any remaining investments classified as Level 3. These models may rely on one or more significant unobservable inputs and/or significant assumptions by the Investment Manager. Inputs used in valuations may include, but are not limited to, financial statement analysis, capital account balances, discount rates and estimated cash flows, and comparable company data.
Under the direction of the Fund’s Board of Trustees (the Board), the Investment Manager’s Valuation Committee (the Committee) is responsible for overseeing the valuation procedures approved by the Board. The Committee consists of voting and non-voting members from various groups within the Investment Manager’s organization, including operations and accounting, trading and investments, compliance, risk management and legal.
The Committee meets at least monthly to review and approve valuation matters, which may include a description of specific valuation determinations, data regarding pricing information received from approved pricing vendors and brokers and the results of Board-approved valuation control policies and procedures (the Policies). The Policies address, among other things, instances when market quotations are or are not readily available, including recommendations of third party pricing vendors and a determination of appropriate pricing methodologies; events that require specific valuation determinations and assessment of fair value techniques; securities with a potential for stale pricing, including those that are illiquid, restricted, or in default; and the effectiveness of third party pricing vendors, including periodic reviews of vendors. The Committee meets more frequently, as needed, to discuss additional valuation matters, which may include the need to review back-testing results, review time-sensitive information or approve related valuation actions. The Committee reports to the Board, with members of the Committee meeting with the Board at each of its regularly scheduled meetings to discuss valuation matters and actions during the period, similar to those described earlier.
The following table is a summary of the inputs used to value the Fund’s investments at February 29, 2020:
  Level 1 ($) Level 2 ($) Level 3 ($) Total ($)
Investments in Securities        
Common Stocks        
Communication Services 44,443,892 44,443,892
Consumer Discretionary 38,133,866 38,133,866
Consumer Staples 29,916,969 29,916,969
Energy 14,588,902 14,588,902
Financials 47,593,425 47,593,425
Health Care 58,008,314 58,008,314
Industrials 34,465,335 34,465,335
Information Technology 98,339,148 98,339,148
Materials 7,952,378 7,952,378
Real Estate 11,355,214 11,355,214
Utilities 13,475,587 13,475,587
Total Common Stocks 398,273,030 398,273,030
Money Market Funds 3,972,793 3,972,793
Total Investments in Securities 402,245,823 402,245,823
Investments in Derivatives        
Liability        
Futures Contracts (425,034) (425,034)
Total 401,820,789 401,820,789
See the Portfolio of Investments for all investment classifications not indicated in the table.
Derivative instruments are valued at unrealized appreciation (depreciation).
The accompanying Notes to Financial Statements are an integral part of this statement.
12 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Statement of Assets and Liabilities
February 29, 2020
Assets  
Investments in securities, at value  
Unaffiliated issuers (cost $310,819,199) $398,273,030
Affiliated issuers (cost $3,972,536) 3,972,793
Receivable for:  
Capital shares sold 445,908
Dividends 791,389
Foreign tax reclaims 2,189
Expense reimbursement due from Investment Manager 3,649
Prepaid expenses 1,841
Total assets 403,490,799
Liabilities  
Payable for:  
Capital shares purchased 775,389
Variation margin for futures contracts 40,392
Management services fees 8,343
Distribution and/or service fees 1,104
Transfer agent fees 40,465
Compensation of board members 116,523
Compensation of chief compliance officer 10
Other expenses 43,689
Total liabilities 1,025,915
Net assets applicable to outstanding capital stock $402,464,884
Represented by  
Paid in capital 287,651,174
Total distributable earnings (loss) 114,813,710
Total - representing net assets applicable to outstanding capital stock $402,464,884
Class A  
Net assets $56,438,737
Shares outstanding 2,441,826
Net asset value per share $23.11
Advisor Class  
Net assets $12,021,298
Shares outstanding 526,592
Net asset value per share $22.83
Institutional Class  
Net assets $97,348,108
Shares outstanding 4,219,888
Net asset value per share $23.07
Institutional 2 Class  
Net assets $11,537,631
Shares outstanding 502,299
Net asset value per share $22.97
Institutional 3 Class  
Net assets $173,757,428
Shares outstanding 7,529,396
Net asset value per share $23.08
Class R  
Net assets $51,361,682
Shares outstanding 2,227,792
Net asset value per share $23.05
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
13

Statement of Operations
Year Ended February 29, 2020
Net investment income  
Income:  
Dividends — unaffiliated issuers $10,366,239
Dividends — affiliated issuers 206,897
Total income 10,573,136
Expenses:  
Management services fees 3,964,615
Distribution and/or service fees  
Class A 170,921
Class R 285,194
Transfer agent fees  
Class A 104,918
Advisor Class 18,309
Institutional Class 427,343
Institutional 2 Class 15,120
Institutional 3 Class 8,335
Class R 87,785
Compensation of board members 31,713
Custodian fees 16,333
Printing and postage fees 28,532
Registration fees 97,112
Audit fees 33,088
Legal fees 12,456
Compensation of chief compliance officer 115
Other 15,573
Total expenses 5,317,462
Fees waived or expenses reimbursed by Investment Manager and its affiliates (1,665,918)
Expense reduction (20)
Total net expenses 3,651,524
Net investment income 6,921,612
Realized and unrealized gain (loss) — net  
Net realized gain (loss) on:  
Investments — unaffiliated issuers 45,416,442
Investments — affiliated issuers 707
Futures contracts 1,348,230
Net realized gain 46,765,379
Net change in unrealized appreciation (depreciation) on:  
Investments — unaffiliated issuers (25,772,028)
Investments — affiliated issuers 257
Futures contracts (1,439,004)
Net change in unrealized appreciation (depreciation) (27,210,775)
Net realized and unrealized gain 19,554,604
Net increase in net assets resulting from operations $26,476,216
The accompanying Notes to Financial Statements are an integral part of this statement.
14 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Statement of Changes in Net Assets
  Year Ended
February 29, 2020
Year Ended
February 28, 2019
Operations    
Net investment income $6,921,612 $5,789,214
Net realized gain 46,765,379 27,051,754
Net change in unrealized appreciation (depreciation) (27,210,775) (7,673,370)
Net increase in net assets resulting from operations 26,476,216 25,167,598
Distributions to shareholders    
Net investment income and net realized gains    
Class A (2,721,479) (6,770,212)
Advisor Class (540,497) (433,283)
Institutional Class (12,448,896) (27,350,744)
Institutional 2 Class (1,215,314) (1,476,257)
Institutional 3 Class (3,428,701) (4,260,470)
Class R (2,226,779) (4,770,255)
Total distributions to shareholders (22,581,666) (45,061,221)
Increase (decrease) in net assets from capital stock activity (146,905,062) 165,302,223
Total increase (decrease) in net assets (143,010,512) 145,408,600
Net assets at beginning of year 545,475,396 400,066,796
Net assets at end of year $402,464,884 $545,475,396
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
15

Statement of Changes in Net Assets   (continued)
  Year Ended Year Ended
  February 29, 2020 February 28, 2019
  Shares Dollars ($) Shares Dollars ($)
Capital stock activity
Class A        
Subscriptions 467,778 11,427,290 1,222,867 28,928,382
Distributions reinvested 93,223 2,274,192 241,051 5,644,252
Redemptions (1,328,844) (32,787,695) (662,483) (15,851,999)
Net increase (decrease) (767,843) (19,086,213) 801,435 18,720,635
Advisor Class        
Subscriptions 398,796 9,400,025 309,941 7,487,315
Distributions reinvested 22,389 540,374 19,095 432,974
Redemptions (119,401) (2,865,633) (130,912) (2,830,909)
Net increase 301,784 7,074,766 198,124 5,089,380
Institutional Class        
Subscriptions 1,044,900 25,106,388 6,180,535 140,039,331
Distributions reinvested 252,722 6,140,053 451,353 10,534,985
Redemptions (11,122,218) (279,640,754) (2,996,785) (69,994,395)
Net increase (decrease) (9,824,596) (248,394,313) 3,635,103 80,579,921
Institutional 2 Class        
Subscriptions 204,608 4,869,879 831,351 18,729,881
Distributions reinvested 50,090 1,215,180 63,602 1,475,923
Redemptions (880,128) (22,044,902) (227,104) (5,194,636)
Net increase (decrease) (625,430) (15,959,843) 667,849 15,011,168
Institutional 3 Class        
Subscriptions 7,232,472 181,696,892 3,355,471 79,354,896
Distributions reinvested 140,369 3,420,127 183,442 4,255,865
Redemptions (2,216,533) (54,491,429) (2,289,680) (55,563,737)
Net increase 5,156,308 130,625,590 1,249,233 28,047,024
Class R        
Subscriptions 1,133,833 27,391,983 1,262,838 30,559,259
Distributions reinvested 75,523 1,841,533 136,826 3,180,125
Redemptions (1,244,666) (30,398,565) (661,854) (15,885,289)
Net increase (decrease) (35,310) (1,165,049) 737,810 17,854,095
Total net increase (decrease) (5,795,087) (146,905,062) 7,289,554 165,302,223
The accompanying Notes to Financial Statements are an integral part of this statement.
16 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

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Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
17

Financial Highlights
The following table is intended to help you understand the Fund’s financial performance. Certain information reflects financial results for a single share of a class held for the periods shown. Per share net investment income (loss) amounts are calculated based on average shares outstanding during the period. Total return assumes reinvestment of all dividends and distributions, if any. Total return does not reflect payment of sales charges, if any. Total return and portfolio turnover are not annualized for periods of less than one year. The portfolio turnover rate is calculated without regard to purchase and sales transactions of short-term instruments and certain derivatives, if any. If such transactions were included, the Fund’s portfolio turnover rate may be higher.
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class A
Year Ended 2/29/2020 $23.52 0.27 0.32 0.59 (0.24) (0.76) (1.00)
Year Ended 2/28/2019 $25.12 0.28 0.69 0.97 (0.24) (2.33) (2.57)
Year Ended 2/28/2018 $23.81 0.32 4.16 4.48 (0.32) (2.85) (3.17)
Year Ended 2/28/2017 $19.69 0.29 4.14 4.43 (0.31) (0.31)
Year Ended 2/29/2016 $22.05 0.27 (2.20) (1.93) (0.43) (0.43)
Advisor Class
Year Ended 2/29/2020 $23.23 0.33 0.32 0.65 (0.29) (0.76) (1.05)
Year Ended 2/28/2019 $24.85 0.36 0.65 1.01 (0.30) (2.33) (2.63)
Year Ended 2/28/2018 $23.58 0.37 4.13 4.50 (0.38) (2.85) (3.23)
Year Ended 2/28/2017 $19.49 0.36 4.09 4.45 (0.36) (0.36)
Year Ended 2/29/2016(d) $21.32 0.20 (1.74) (1.54) (0.29) (0.29)
Institutional Class
Year Ended 2/29/2020 $23.47 0.32 0.33 0.65 (0.29) (0.76) (1.05)
Year Ended 2/28/2019 $25.07 0.34 0.69 1.03 (0.30) (2.33) (2.63)
Year Ended 2/28/2018 $23.77 0.38 4.15 4.53 (0.38) (2.85) (3.23)
Year Ended 2/28/2017 $19.65 0.34 4.14 4.48 (0.36) (0.36)
Year Ended 2/29/2016 $22.01 0.34 (2.22) (1.88) (0.48) (0.48)
Institutional 2 Class
Year Ended 2/29/2020 $23.37 0.35 0.32 0.67 (0.31) (0.76) (1.07)
Year Ended 2/28/2019 $24.98 0.37 0.68 1.05 (0.33) (2.33) (2.66)
Year Ended 2/28/2018 $23.69 0.40 4.14 4.54 (0.40) (2.85) (3.25)
Year Ended 2/28/2017 $19.58 0.36 4.13 4.49 (0.38) (0.38)
Year Ended 2/29/2016 $21.93 0.37 (2.22) (1.85) (0.50) (0.50)
Institutional 3 Class
Year Ended 2/29/2020 $23.47 0.38 0.31 0.69 (0.32) (0.76) (1.08)
Year Ended 2/28/2019 $25.07 0.38 0.69 1.07 (0.34) (2.33) (2.67)
Year Ended 2/28/2018 $23.77 0.44 4.13 4.57 (0.42) (2.85) (3.27)
Year Ended 2/28/2017 $19.65 0.37 4.14 4.51 (0.39) (0.39)
Year Ended 2/29/2016 $22.01 0.38 (2.23) (1.85) (0.51) (0.51)
The accompanying Notes to Financial Statements are an integral part of this statement.
18 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class A
Year Ended 2/29/2020 $23.11 2.33% 1.20% 0.88%(c) 1.11% 77% $56,439
Year Ended 2/28/2019 $23.52 4.14% 1.21% 0.89% 1.17% 99% $75,497
Year Ended 2/28/2018 $25.12 19.81% 1.23% 0.89% 1.31% 70% $60,502
Year Ended 2/28/2017 $23.81 22.62% 1.24% 0.89%(c) 1.32% 79% $79,005
Year Ended 2/29/2016 $19.69 (8.94%) 1.25% 0.90% 1.27% 89% $75,126
Advisor Class
Year Ended 2/29/2020 $22.83 2.60% 0.95% 0.63%(c) 1.38% 77% $12,021
Year Ended 2/28/2019 $23.23 4.38% 0.96% 0.64% 1.53% 99% $5,222
Year Ended 2/28/2018 $24.85 20.12% 0.98% 0.64% 1.48% 70% $663
Year Ended 2/28/2017 $23.58 22.98% 0.99% 0.64%(c) 1.64% 79% $260
Year Ended 2/29/2016(d) $19.49 (7.31%) 1.01%(e) 0.65%(e) 1.49%(e) 89% $120
Institutional Class
Year Ended 2/29/2020 $23.07 2.58% 0.94% 0.63%(c) 1.34% 77% $97,348
Year Ended 2/28/2019 $23.47 4.42% 0.96% 0.64% 1.41% 99% $329,587
Year Ended 2/28/2018 $25.07 20.08% 0.98% 0.64% 1.56% 70% $260,985
Year Ended 2/28/2017 $23.77 22.94% 0.99% 0.64%(c) 1.57% 79% $256,195
Year Ended 2/29/2016 $19.65 (8.73%) 1.00% 0.65% 1.61% 89% $299,136
Institutional 2 Class
Year Ended 2/29/2020 $22.97 2.66% 0.85% 0.54% 1.46% 77% $11,538
Year Ended 2/28/2019 $23.37 4.50% 0.87% 0.54% 1.56% 99% $26,349
Year Ended 2/28/2018 $24.98 20.20% 0.87% 0.55% 1.63% 70% $11,486
Year Ended 2/28/2017 $23.69 23.08% 0.86% 0.56% 1.66% 79% $7,078
Year Ended 2/29/2016 $19.58 (8.62%) 0.84% 0.55% 1.78% 89% $2,969
Institutional 3 Class
Year Ended 2/29/2020 $23.08 2.73% 0.81% 0.49% 1.59% 77% $173,757
Year Ended 2/28/2019 $23.47 4.58% 0.81% 0.49% 1.61% 99% $55,689
Year Ended 2/28/2018 $25.07 20.24% 0.82% 0.50% 1.77% 70% $28,180
Year Ended 2/28/2017 $23.77 23.11% 0.81% 0.51% 1.71% 79% $5,016
Year Ended 2/29/2016 $19.65 (8.59%) 0.80% 0.50% 1.79% 89% $2,520
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
19

Financial Highlights  (continued)
  Net asset value,
beginning of
period
Net
investment
income
Net
realized
and
unrealized
gain (loss)
Total from
investment
operations
Distributions
from net
investment
income
Distributions
from net
realized
gains
Total
distributions to
shareholders
Class R
Year Ended 2/29/2020 $23.48 0.21 0.31 0.52 (0.19) (0.76) (0.95)
Year Ended 2/28/2019 $25.08 0.22 0.69 0.91 (0.18) (2.33) (2.51)
Year Ended 2/28/2018 $23.78 0.26 4.15 4.41 (0.26) (2.85) (3.11)
Year Ended 2/28/2017 $19.66 0.23 4.15 4.38 (0.26) (0.26)
Year Ended 2/29/2016 $22.02 0.25 (2.24) (1.99) (0.37) (0.37)
    
Notes to Financial Highlights
(a) In addition to the fees and expenses that the Fund bears directly, the Fund indirectly bears a pro rata share of the fees and expenses of any other funds in which it invests. Such indirect expenses are not included in the Fund’s reported expense ratios.
(b) Total net expenses include the impact of certain fee waivers/expense reimbursements made by the Investment Manager and certain of its affiliates, if applicable.
(c) The benefits derived from expense reductions had an impact of less than 0.01%.
(d) Advisor Class shares commenced operations on July 1, 2015. Per share data and total return reflect activity from that date.
(e) Annualized.
The accompanying Notes to Financial Statements are an integral part of this statement.
20 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Financial Highlights  (continued)
  Net
asset
value,
end of
period
Total
return
Total gross
expense
ratio to
average
net assets(a)
Total net
expense
ratio to
average
net assets(a),(b)
Net investment
income
ratio to
average
net assets
Portfolio
turnover
Net
assets,
end of
period
(000’s)
Class R
Year Ended 2/29/2020 $23.05 2.04% 1.45% 1.13%(c) 0.86% 77% $51,362
Year Ended 2/28/2019 $23.48 3.88% 1.46% 1.14% 0.93% 99% $53,131
Year Ended 2/28/2018 $25.08 19.51% 1.48% 1.14% 1.06% 70% $38,251
Year Ended 2/28/2017 $23.78 22.36% 1.49% 1.14%(c) 1.08% 79% $37,996
Year Ended 2/29/2016 $19.66 (9.18%) 1.51% 1.15% 1.20% 89% $29,687
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
21

Notes to Financial Statements
February 29, 2020
Note 1. Organization
Columbia Large Cap Enhanced Core Fund (the Fund), a series of Columbia Funds Series Trust (the Trust), is a diversified fund. The Trust is registered under the Investment Company Act of 1940, as amended (the 1940 Act), as an open-end management investment company organized as a Delaware statutory trust.
Fund shares
The Trust may issue an unlimited number of shares (without par value). The Fund offers each of the share classes listed in the Statement of Assets and Liabilities. Although all share classes generally have identical voting, dividend and liquidation rights, each share class votes separately when required by the Trust’s organizational documents or by law. Each share class has its own expense and sales charge structure. Different share classes may have different minimum initial investment amounts and pay different distribution amounts to the extent the expenses of distributing such share classes vary. Distributions to shareholders in a liquidation will be proportional to the net asset value of each share class.
As described in the Fund’s prospectus, Class A shares are offered to the general public for investment. Advisor Class, Institutional Class, Institutional 2 Class, Institutional 3 Class and Class R shares are available for purchase through authorized investment professionals to omnibus retirement plans or to institutional investors and to certain other investors as also described in the Fund’s prospectus.
Note 2. Summary of significant accounting policies
Basis of preparation
The Fund is an investment company that applies the accounting and reporting guidance in the Financial Accounting Standards Board (FASB) Accounting Standards Codification Topic 946, Financial Services - Investment Companies (ASC 946). The financial statements are prepared in accordance with U.S. generally accepted accounting principles (GAAP), which requires management to make certain estimates and assumptions that affect the reported amounts of assets and liabilities, the disclosure of contingent assets and liabilities at the date of the financial statements and the reported amounts of income and expenses during the reporting period. Actual results could differ from those estimates.
The following is a summary of significant accounting policies followed by the Fund in the preparation of its financial statements.
Security valuation
All equity securities are valued at the close of business of the New York Stock Exchange. Equity securities are valued at the official closing price on the principal exchange or market on which they trade. Unlisted securities or listed securities for which there were no sales during the day are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets.
Foreign equity securities are valued based on the closing price on the foreign exchange in which such securities are primarily traded. If any foreign equity security closing prices are not readily available, the securities are valued at the mean of the latest quoted bid and ask prices on such exchanges or markets. Foreign currency exchange rates are determined at the scheduled closing time of the New York Stock Exchange. Many securities markets and exchanges outside the U.S. close prior to the close of the New York Stock Exchange; therefore, the closing prices for securities in such markets or on such exchanges may not fully reflect events that occur after such close but before the close of the New York Stock Exchange. In those situations, foreign securities will be fair valued pursuant to a policy adopted by the Board of Trustees. Under the policy, the Fund may utilize a third-party pricing service to determine these fair values. The third-party pricing service takes into account multiple factors, including, but not limited to, movements in the U.S. securities markets, certain depositary receipts, futures contracts and foreign exchange rates that have occurred subsequent to the close of the foreign exchange or market, to determine a good faith estimate that reasonably reflects the current market conditions as of the close of the New York Stock Exchange. The fair value of a security is likely to be different from the quoted or published price, if available.
Investments in open-end investment companies, including money market funds, are valued at their latest net asset value.
22 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Futures and options on futures contracts are valued based upon the settlement price at the close of regular trading on their principal exchanges or, in the absence of transactions, at the mean of the latest quoted bid and ask prices.
Investments for which market quotations are not readily available, or that have quotations which management believes are not reflective of market value or reliable, are valued at fair value as determined in good faith under procedures approved by and under the general supervision of the Board of Trustees. If a security or class of securities (such as foreign securities) is valued at fair value, such value is likely to be different from the quoted or published price for the security, if available.
The determination of fair value often requires significant judgment. To determine fair value, management may use assumptions including but not limited to future cash flows and estimated risk premiums. Multiple inputs from various sources may be used to determine fair value.
GAAP requires disclosure regarding the inputs and valuation techniques used to measure fair value and any changes in valuation inputs or techniques. In addition, investments shall be disclosed by major category. This information is disclosed following the Fund’s Portfolio of Investments.
Derivative instruments
The Fund invests in certain derivative instruments, as detailed below, to meet its investment objectives. Derivatives are instruments whose values depend on, or are derived from, in whole or in part, the value of one or more securities, currencies, commodities, indices, or other assets or instruments. Derivatives may be used to increase investment flexibility (including to maintain cash reserves while maintaining desired exposure to certain assets), for risk management (hedging) purposes, to facilitate trading, to reduce transaction costs and to pursue higher investment returns. The Fund may also use derivative instruments to mitigate certain investment risks, such as foreign currency exchange rate risk, interest rate risk and credit risk. Derivatives may involve various risks, including the potential inability of the counterparty to fulfill its obligations under the terms of the contract, the potential for an illiquid secondary market (making it difficult for the Fund to sell or terminate, including at favorable prices) and the potential for market movements which may expose the Fund to gains or losses in excess of the amount shown in the Statement of Assets and Liabilities. The notional amounts of derivative instruments, if applicable, are not recorded in the financial statements.
A derivative instrument may suffer a marked-to-market loss if the value of the contract decreases due to an unfavorable change in the market rates or values of the underlying instrument. Losses can also occur if the counterparty does not perform its obligations under the contract. The Fund’s risk of loss from counterparty credit risk on over-the-counter derivatives is generally limited to the aggregate unrealized gain netted against any collateral held by the Fund and the amount of any variation margin held by the counterparty, plus any replacement costs or related amounts. With exchange-traded or centrally cleared derivatives, there is reduced counterparty credit risk to the Fund since the clearinghouse or central counterparty (CCP) provides some protection in the case of clearing member default. The clearinghouse or CCP stands between the buyer and the seller of the contract; therefore, additional counterparty credit risk is failure of the clearinghouse or CCP. However, credit risk still exists in exchange-traded or centrally cleared derivatives with respect to initial and variation margin that is held in a broker’s customer account. While brokers are required to segregate customer margin from their own assets, in the event that a broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the broker for all its clients, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the broker’s customers (including the Fund), potentially resulting in losses to the Fund.
In order to better define its contractual rights and to secure rights that will help the Fund mitigate its counterparty risk, the Fund may enter into an International Swaps and Derivatives Association, Inc. Master Agreement (ISDA Master Agreement) or similar agreement with its derivatives contract counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and typically contains, among other things, collateral posting terms and netting provisions in the event of a default and/or termination event. Under an ISDA Master Agreement, the Fund may, under certain circumstances, offset with the counterparty certain derivative instrument’s payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the ISDA Master Agreement typically permit a single net payment in the event of default (close-out netting), including the bankruptcy or insolvency of the counterparty. Note, however, that bankruptcy or insolvency laws of a particular jurisdiction may impose restrictions on or prohibitions against the right of offset or netting in bankruptcy, insolvency or other events.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
23

Notes to Financial Statements  (continued)
February 29, 2020
Collateral (margin) requirements differ by type of derivative. Margin requirements are established by the clearinghouse or CCP for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms are contract specific for over-the-counter derivatives. For over-the-counter derivatives traded under an ISDA Master Agreement, the collateral requirements are typically calculated by netting the marked-to-market amount for each transaction under such agreement and comparing that amount to the value of any variation margin currently pledged by the Fund and/or the counterparty. Generally, the amount of collateral due from or to a party has to exceed a minimum transfer amount threshold (e.g., $250,000) before a transfer has to be made. To the extent amounts due to the Fund from its counterparties are not fully collateralized, contractually or otherwise, the Fund bears the risk of loss from counterparty nonperformance. The Fund may also pay interest expense on cash collateral received from the broker. Any interest expense paid by the Fund is shown on the Statement of Operations. The Fund attempts to mitigate counterparty risk by only entering into agreements with counterparties that it believes have the financial resources to honor their obligations and by monitoring the financial stability of those counterparties.
Certain ISDA Master Agreements allow counterparties of over-the-counter derivatives transactions to terminate derivatives contracts prior to maturity in the event the Fund’s net asset value declines by a stated percentage over a specified time period or if the Fund fails to meet certain terms of the ISDA Master Agreement, which would cause the Fund to accelerate payment of any net liability owed to the counterparty. The Fund also has termination rights if the counterparty fails to meet certain terms of the ISDA Master Agreement. In determining whether to exercise such termination rights, the Fund would consider, in addition to counterparty credit risk, whether termination would result in a net liability owed from the counterparty.
For financial reporting purposes, the Fund does not offset derivative assets and derivative liabilities that are subject to netting arrangements in the Statement of Assets and Liabilities.
Futures contracts
Futures contracts are exchange-traded and represent commitments for the future purchase or sale of an asset at a specified price on a specified date. The Fund bought and sold futures contracts to maintain appropriate equity market exposure while keeping sufficient cash to accommodate daily redemptions. These instruments may be used for other purposes in future periods. Upon entering into futures contracts, the Fund bears risks that it may not achieve the anticipated benefits of the futures contracts and may realize a loss. Additional risks include counterparty credit risk, the possibility of an illiquid market, and that a change in the value of the contract or option may not correlate with changes in the value of the underlying asset.
Upon entering into a futures contract, the Fund deposits cash or securities with the broker, known as a futures commission merchant (FCM), in an amount sufficient to meet the initial margin requirement. The initial margin deposit must be maintained at an established level over the life of the contract. Cash deposited as initial margin is recorded in the Statement of Assets and Liabilities as margin deposits. Securities deposited as initial margin are designated in the Portfolio of Investments. Subsequent payments (variation margin) are made or received by the Fund each day. The variation margin payments are equal to the daily change in the contract value and are recorded as variation margin receivable or payable and are offset in unrealized gains or losses. The Fund recognizes a realized gain or loss when the contract is closed or expires. Futures contracts involve, to varying degrees, risk of loss in excess of the variation margin disclosed in the Statement of Assets and Liabilities.
Effects of derivative transactions in the financial statements
The following tables are intended to provide additional information about the effect of derivatives on the financial statements of the Fund, including: the fair value of derivatives by risk category and the location of those fair values in the Statement of Assets and Liabilities; and the impact of derivative transactions over the period in the Statement of Operations, including realized and unrealized gains (losses). The derivative instrument schedules following the Portfolio of Investments present additional information regarding derivative instruments outstanding at the end of the period, if any.
24 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at February 29, 2020:
  Liability derivatives  
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Equity risk Component of total distributable earnings (loss) — unrealized depreciation on futures contracts 425,034*
    
* Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin is reported in receivables or payables in the Statement of Assets and Liabilities.
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended February 29, 2020:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category           Futures
contracts
($)
Equity risk           1,348,230
 
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category           Futures
contracts
($)
Equity risk           (1,439,004)
The following table is a summary of the average outstanding volume by derivative instrument for the year ended February 29, 2020:
Derivative instrument Average notional
amounts ($)*
Futures contracts — long 9,367,588
    
* Based on the ending quarterly outstanding amounts for the year ended February 29, 2020.
Security transactions
Security transactions are accounted for on the trade date. Cost is determined and gains (losses) are based upon the specific identification method for both financial statement and federal income tax purposes.
Income recognition
Corporate actions and dividend income are generally recorded net of any non-reclaimable tax withholdings, on the ex-dividend date or upon receipt of ex-dividend notification in the case of certain foreign securities.
The Fund may receive distributions from holdings in equity securities, business development companies (BDCs), exchange-traded funds (ETFs), limited partnerships (LPs), other regulated investment companies (RICs), and real estate investment trusts (REITs), which report information as to the tax character of their distributions annually. These distributions are allocated to dividend income, capital gain and return of capital based on actual information reported. Return of capital is recorded as a reduction of the cost basis of securities held. If the Fund no longer owns the applicable securities, return of capital is recorded as a realized gain. With respect to REITs, to the extent actual information has not yet been reported, estimates for return of capital are made by Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). The Investment Manager’s estimates are subsequently adjusted when the actual character of the distributions is disclosed by the REITs, which could result in a proportionate change in return of capital to shareholders.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
25

Notes to Financial Statements  (continued)
February 29, 2020
Awards from class action litigation are recorded as a reduction of cost basis if the Fund still owns the applicable securities on the payment date. If the Fund no longer owns the applicable securities on the payment date, the proceeds are recorded as realized gains.
Expenses
General expenses of the Trust are allocated to the Fund and other funds of the Trust based upon relative net assets or other expense allocation methodologies determined by the nature of the expense. Expenses directly attributable to the Fund are charged to the Fund. Expenses directly attributable to a specific class of shares are charged to that share class.
Determination of class net asset value
All income, expenses (other than class-specific expenses, which are charged to that share class, as shown in the Statement of Operations) and realized and unrealized gains (losses) are allocated to each class of the Fund on a daily basis, based on the relative net assets of each class, for purposes of determining the net asset value of each class.
Federal income tax status
The Fund intends to qualify each year as a regulated investment company under Subchapter M of the Internal Revenue Code, as amended, and will distribute substantially all of its investment company taxable income and net capital gain, if any, for its tax year, and as such will not be subject to federal income taxes. In addition, the Fund intends to distribute in each calendar year substantially all of its ordinary income, capital gain net income and certain other amounts, if any, such that the Fund should not be subject to federal excise tax. Therefore, no federal income or excise tax provision is recorded.
Distributions to shareholders
Distributions from net investment income, if any, are declared and paid semi-annually. Net realized capital gains, if any, are distributed at least annually. Income distributions and capital gain distributions are determined in accordance with federal income tax regulations, which may differ from GAAP.
Guarantees and indemnifications
Under the Trust’s organizational documents and, in some cases, by contract, its officers and trustees are indemnified against certain liabilities arising out of the performance of their duties to the Trust or its funds. In addition, certain of the Fund’s contracts with its service providers contain general indemnification clauses. The Fund’s maximum exposure under these arrangements is unknown since the amount of any future claims that may be made against the Fund cannot be determined, and the Fund has no historical basis for predicting the likelihood of any such claims.
Note 3. Fees and other transactions with affiliates
Management services fees
The Fund has entered into a Management Agreement with Columbia Management Investment Advisers, LLC (the Investment Manager), a wholly-owned subsidiary of Ameriprise Financial, Inc. (Ameriprise Financial). Under the Management Agreement, the Investment Manager provides the Fund with investment research and advice, as well as administrative and accounting services. The management services fee is an annual fee that is equal to a percentage of the Fund’s daily net assets that declines from 0.75% to 0.55% as the Fund’s net assets increase. The effective management services fee rate for the year ended February 29, 2020 was 0.75% of the Fund’s average daily net assets.
Compensation of board members
Members of the Board of Trustees who are not officers or employees of the Investment Manager or Ameriprise Financial are compensated for their services to the Fund as disclosed in the Statement of Operations. Under a Deferred Compensation Plan (the Deferred Plan), these members of the Board of Trustees may elect to defer payment of up to 100% of their compensation. Deferred amounts are treated as though equivalent dollar amounts had been invested in shares of certain funds managed by the Investment Manager. The Fund’s liability for these amounts is adjusted for market value changes and remains in the Fund until distributed in accordance with the Deferred Plan. All amounts payable under the Deferred Plan constitute a general unsecured obligation of the Fund.
26 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Compensation of Chief Compliance Officer
The Board of Trustees has appointed a Chief Compliance Officer for the Fund in accordance with federal securities regulations. As disclosed in the Statement of Operations, a portion of the Chief Compliance Officer’s total compensation is allocated to the Fund, along with other allocations to affiliated registered investment companies managed by the Investment Manager and its affiliates, based on relative net assets.
Transfer agency fees
Under a Transfer and Dividend Disbursing Agent Agreement, Columbia Management Investment Services Corp. (the Transfer Agent), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, is responsible for providing transfer agency services to the Fund. The Transfer Agent has contracted with DST Asset Manager Solutions, Inc. (DST) to serve as sub-transfer agent. The Transfer Agent pays the fees of DST for services as sub-transfer agent and DST is not entitled to reimbursement for such fees from the Fund (with the exception of out-of-pocket fees).
The Fund pays the Transfer Agent a monthly transfer agency fee based on the number or the average value of accounts, depending on the type of account. In addition, the Fund pays the Transfer Agent a fee for shareholder services based on the number of accounts or on a percentage of the average aggregate value of the Fund’s shares maintained in omnibus accounts up to the lesser of the amount charged by the financial intermediary or a cap established by the Board of Trustees from time to time.
The Transfer Agent also receives compensation from the Fund for various shareholder services and reimbursements for certain out-of-pocket fees. Total transfer agency fees for Institutional 2 Class and Institutional 3 Class shares are subject to an annual limitation of not more than 0.07% and 0.02%, respectively, of the average daily net assets attributable to each share class.
For the year ended February 29, 2020, the Fund’s effective transfer agency fee rates as a percentage of average daily net assets of each class were as follows:
  Effective rate (%)
Class A 0.15
Advisor Class 0.16
Institutional Class 0.15
Institutional 2 Class 0.06
Institutional 3 Class 0.01
Class R 0.15
An annual minimum account balance fee of $20 may apply to certain accounts with a value below the applicable share class’s initial minimum investment requirements to reduce the impact of small accounts on transfer agency fees. These minimum account balance fees are remitted to the Fund and recorded as part of expense reductions in the Statement of Operations. For the year ended February 29, 2020, these minimum account balance fees reduced total expenses of the Fund by $20.
Distribution and service fees
The Fund has entered into an agreement with Columbia Management Investment Distributors, Inc. (the Distributor), an affiliate of the Investment Manager and a wholly-owned subsidiary of Ameriprise Financial, for distribution and shareholder services. The Board of Trustees has approved, and the Fund has adopted, distribution and shareholder service plans (the Plans) applicable to certain share classes, which set the distribution and service fees for the Fund. These fees are calculated daily and are intended to compensate the Distributor and/or eligible selling and/or servicing agents for selling shares of the Fund and providing services to investors.
Under the Plans, the Fund pays a monthly combined distribution and service fee to the Distributor at the maximum annual rate of 0.25% of the average daily net assets attributable to Class A shares of the Fund. Also under the Plans, the Fund pays a monthly distribution fee to the Distributor at the maximum annual rate of 0.50% of the average daily net assets attributable to Class R shares of the Fund.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
27

Notes to Financial Statements  (continued)
February 29, 2020
Expenses waived/reimbursed by the Investment Manager and its affiliates
The Investment Manager and certain of its affiliates have contractually agreed to waive fees and/or reimburse expenses (excluding certain fees and expenses described below) for the period(s) disclosed below, unless sooner terminated at the sole discretion of the Board of Trustees, so that the Fund’s net operating expenses, after giving effect to fees waived/expenses reimbursed and any balance credits and/or overdraft charges from the Fund’s custodian, do not exceed the following annual rate(s) as a percentage of the class’ average daily net assets:
  July 1, 2019
through
June 30, 2020
Prior to
July 1, 2019
Class A 0.88% 0.89%
Advisor Class 0.63 0.64
Institutional Class 0.63 0.64
Institutional 2 Class 0.54 0.54
Institutional 3 Class 0.49 0.49
Class R 1.13 1.14
Under the agreement governing these fee waivers and/or expense reimbursement arrangements, the following fees and expenses are excluded from the waiver/reimbursement commitment, and therefore will be paid by the Fund, if applicable: taxes (including foreign transaction taxes), expenses associated with investments in affiliated and non-affiliated pooled investment vehicles (including mutual funds and exchange-traded funds), transaction costs and brokerage commissions, costs related to any securities lending program, dividend expenses associated with securities sold short, inverse floater program fees and expenses, transaction charges and interest on borrowed money, interest, infrequent and/or unusual expenses and any other expenses the exclusion of which is specifically approved by the Board of Trustees. This agreement may be modified or amended only with approval from the Investment Manager, certain of its affiliates and the Fund. Any fees waived and/or expenses reimbursed under the expense reimbursement arrangements described above are not recoverable by the Investment Manager or its affiliates in future periods.
Note 4. Federal tax information
The timing and character of income and capital gain distributions are determined in accordance with income tax regulations, which may differ from GAAP because of temporary or permanent book to tax differences.
At February 29, 2020, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, trustees’ deferred compensation, derivative investments, tax straddles, re-characterization of distributions for investments, and earnings and profits distributed to shareholders on the redemption of shares. To the extent these differences were permanent, reclassifications were made among the components of the Fund’s net assets. Temporary differences do not require reclassifications.
The following reclassifications were made:
Undistributed net
investment
income ($)
Accumulated
net realized
gain ($)
Paid in
capital ($)
(144,725) (3,943,250) 4,087,975
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended February 29, 2020 Year Ended February 28, 2019
Ordinary
income ($)
Long-term
capital gains ($)
Total ($) Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
5,789,273 16,792,393 22,581,666 11,622,238 33,438,983 45,061,221
28 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
At February 29, 2020, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
appreciation ($)
1,303,078 28,865,818 84,760,216
At February 29, 2020, the cost of all investments for federal income tax purposes along with the aggregate gross unrealized appreciation and depreciation based on that cost was:
Federal
tax cost ($)
Gross unrealized
appreciation ($)
Gross unrealized
(depreciation) ($)
Net unrealized
appreciation ($)
317,060,573 101,023,760 (16,263,544) 84,760,216
Tax cost of investments and unrealized appreciation/(depreciation) may also include timing differences that do not constitute adjustments to tax basis.
Management of the Fund has concluded that there are no significant uncertain tax positions in the Fund that would require recognition in the financial statements. However, management’s conclusion may be subject to review and adjustment at a later date based on factors including, but not limited to, new tax laws, regulations, and administrative interpretations (including relevant court decisions). Generally, the Fund’s federal tax returns for the prior three fiscal years remain subject to examination by the Internal Revenue Service.
Note 5. Portfolio information
The cost of purchases and proceeds from sales of securities, excluding short-term investments and derivatives, if any, aggregated to $395,342,445 and $541,886,647, respectively, for the year ended February 29, 2020. The amount of purchase and sale activity impacts the portfolio turnover rate reported in the Financial Highlights.
Note 6. Affiliated money market fund
The Fund invests in Columbia Short-Term Cash Fund, an affiliated money market fund established for the exclusive use by the Fund and other affiliated funds (the Affiliated MMF). The income earned by the Fund from such investments is included as Dividends - affiliated issuers in the Statement of Operations. As an investing fund, the Fund indirectly bears its proportionate share of the expenses of the Affiliated MMF. The Affiliated MMF prices its shares with a floating net asset value. In addition, the Board of Trustees of the Affiliated MMF may impose a fee on redemptions (sometimes referred to as a liquidity fee) or temporarily suspend redemptions (sometimes referred to as imposing a redemption gate) in the event its liquidity falls below regulatory limits.
Note 7. Interfund lending
Pursuant to an exemptive order granted by the Securities and Exchange Commission, the Fund participates in a program (the Interfund Program) allowing each participating Columbia Fund (each, a Participating Fund) to lend money directly to and, except for closed-end funds and money market funds, borrow money directly from other Participating Funds for temporary purposes. The amounts eligible for borrowing and lending under the Interfund Program are subject to certain restrictions.
Interfund loans are subject to the risk that the borrowing fund could be unable to repay the loan when due, and a delay in repayment to the lending fund could result in lost opportunities and/or additional lending costs. The exemptive order is subject to conditions intended to mitigate conflicts of interest arising from the Investment Manager’s relationship with each Participating Fund.
The Fund did not borrow or lend money under the Interfund Program during the year ended February 29, 2020.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
29

Notes to Financial Statements  (continued)
February 29, 2020
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by Citibank, N.A., HSBC Bank USA, N.A. and JPMorgan Chase Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. The credit facility, which is a collective agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits collective borrowings up to $1 billion. Interest is charged to each participating fund based on its borrowings at a rate equal to the higher of (i) the federal funds effective rate, (ii) the one-month LIBOR rate and (iii) the overnight bank funding rate, plus in each case, 1.00%. Each borrowing under the credit facility matures no later than 60 days after the date of borrowing. The Fund also pays a commitment fee equal to its pro rata share of the unused amount of the credit facility at a rate of 0.15% per annum. The commitment fee is included in other expenses in the Statement of Operations. This agreement expires annually in December unless extended or renewed.
The Fund had no borrowings during the year ended February 29, 2020.
Note 9. Significant risks
Information technology sector risk
The Fund may be more susceptible to the particular risks that may affect companies in the information technology sector than if it were invested in a wider variety of companies in unrelated sectors. Companies in the information technology sectors are subject to certain risks, including the risk that new services, equipment or technologies will not be accepted by consumers and businesses or will become rapidly obsolete. Performance of such companies may be affected by factors including obtaining and protecting patents (or the failure to do so) and significant competitive pressures, including aggressive pricing of their products or services, new market entrants, competition for market share and short product cycles due to an accelerated rate of technological developments. Such competitive pressures may lead to limited earnings and/or falling profit margins. As a result, the value of their securities may fall or fail to rise. In addition, many information technology sector companies have limited operating histories and prices of these companies’ securities historically have been more volatile than other securities, especially over the short term.
Market and environment risk
The Fund may incur losses due to declines in the value of one or more securities in which it invests. These declines may be due to factors affecting a particular issuer, or the result of, among other things, political, regulatory, market, economic or social developments affecting the relevant market(s) more generally. In addition, turbulence in financial markets and reduced liquidity in equity, credit and/or fixed income markets may negatively affect many issuers, which could adversely affect Fund, including causing difficulty in assigning prices to hard-to-value assets in thinly traded and closed markets, significant redemptions and operational challenges. Global economies and financial markets are increasingly interconnected, and conditions and events in one country, region or financial market may adversely impact issuers in a different country, region or financial market. These risks may be magnified if certain events or developments adversely interrupt the global supply chain; in these and other circumstances, such risks might affect companies worldwide. As a result, local, regional or global events such as terrorism, war, natural disasters, disease/virus outbreaks and epidemics or other public health issues, recessions, depressions or other events – or the potential for such events – could have a significant negative impact on global economic and market conditions.
The coronavirus disease 2019 (COVID-19) public health crisis has become a pandemic that has resulted in, and may continue to result in, significant global economic and societal disruption and market volatility due to disruptions in market access, resource availability, facilities operations, imposition of tariffs, export controls and supply chain disruption, among others. Such disruptions may be caused, or exacerbated by, quarantines and travel restrictions, workforce displacement and loss in human and other resources. The uncertainty surrounding the magnitude, duration, reach, costs and effects of the global pandemic, as well as actions that have been or could be taken by governmental authorities or other third parties, present unknowns that are yet to unfold. The impacts, as well as the uncertainty over impacts to come, of COVID-19 – and any other infectious illness outbreaks, epidemics and pandemics that may arise in the future – could negatively affect global economies and markets in ways that cannot necessarily be foreseen. In addition, the impact of infectious illness outbreaks and epidemics in emerging market countries may be greater due to generally less established healthcare systems,
30 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

Notes to Financial Statements  (continued)
February 29, 2020
governments and financial markets. Public health crises caused by the COVID-19 outbreak may exacerbate other pre-existing political, social and economic risks in certain countries or globally. The disruptions caused by COVID-19 could prevent the Fund from executing advantageous investment decisions in a timely manner and negatively impact the Fund’s ability to achieve their investment objectives. Any such event(s) could have a significant adverse impact on the value and risk profile of the Fund.
The Investment Manager and its affiliates have systematically implemented strategies to address the operating environment spurred by the COVID-19 pandemic. To promote the safety and security of our employees and to assure the continuity of our business operations, we have implemented a work from home protocol for virtually all of our employee population, restricted business travel, and provided resources for complying with the guidance from the World Health Organization, the U.S. Centers for Disease Control and governments. Our operations teams seek to operate without significant disruptions in service. Our pandemic strategy takes into consideration that a pandemic could be widespread and may occur in multiple waves, affecting different communities at different times with varying levels of severity. We cannot, however, predict the impact that natural or man-made disasters, including the COVID-19 pandemic, may have on the ability of our employees and third-party service providers to continue ordinary business operations and technology functions over near- or longer-term periods.
Shareholder concentration risk
At February 29, 2020, one unaffiliated shareholder of record owned 35.8% of the outstanding shares of the Fund in one or more accounts. The Fund has no knowledge about whether any portion of those shares was owned beneficially. Affiliated shareholders of record owned 10.5% of the outstanding shares of the Fund in one or more accounts. Subscription and redemption activity by concentrated accounts may have a significant effect on the operations of the Fund. In the case of a large redemption, the Fund may be forced to sell investments at inopportune times, including its liquid positions, which may result in Fund losses and the Fund holding a higher percentage of less liquid positions. Large redemptions could result in decreased economies of scale and increased operating expenses for non-redeeming Fund shareholders.
Note 10. Subsequent events
Management has evaluated the events and transactions that have occurred through the date the financial statements were issued and noted no items requiring adjustment of the financial statements or additional disclosure.
Note 11. Information regarding pending and settled legal proceedings
Ameriprise Financial and certain of its affiliates have historically been involved in a number of legal, arbitration and regulatory proceedings, including routine litigation, class actions, and governmental actions, concerning matters arising in connection with the conduct of their business activities. Ameriprise Financial believes that the Fund is not currently the subject of, and that neither Ameriprise Financial nor any of its affiliates are the subject of, any pending legal, arbitration or regulatory proceedings that are likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund. Ameriprise Financial is required to make quarterly (10-Q), annual (10-K) and, as necessary, 8-K filings with the Securities and Exchange Commission (SEC) on legal and regulatory matters that relate to Ameriprise Financial and its affiliates. Copies of these filings may be obtained by accessing the SEC website at www.sec.gov.
There can be no assurance that these matters, or the adverse publicity associated with them, will not result in increased Fund redemptions, reduced sale of Fund shares or other adverse consequences to the Fund. Further, although we believe proceedings are not likely to have a material adverse effect on the Fund or the ability of Ameriprise Financial or its affiliates to perform under their contracts with the Fund, these proceedings are subject to uncertainties and, as such, we are unable to estimate the possible loss or range of loss that may result. An adverse outcome in one or more of these proceedings could result in adverse judgments, settlements, fines, penalties or other relief that could have a material adverse effect on the consolidated financial condition or results of operations of Ameriprise Financial.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
31

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Large Cap Enhanced Core Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Large Cap Enhanced Core Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of February 29, 2020, the related statement of operations for the year ended February 29, 2020, the statement of changes in net assets for each of the two years in the period ended February 29, 2020, including the related notes, and the financial highlights for each of the periods indicated therein (collectively referred to as the “financial statements”). In our opinion, the financial statements present fairly, in all material respects, the financial position of the Fund as of February 29, 2020, the results of its operations for the year then ended, the changes in its net assets for each of the two years in the period ended February 29, 2020 and the financial highlights for each of the periods indicated therein in conformity with accounting principles generally accepted in the United States of America.
Basis for Opinion
These financial statements are the responsibility of the Fund’s management. Our responsibility is to express an opinion on the Fund’s financial statements based on our audits. We are a public accounting firm registered with the Public Company Accounting Oversight Board (United States) (PCAOB) and are required to be independent with respect to the Fund in accordance with the U.S. federal securities laws and the applicable rules and regulations of the Securities and Exchange Commission and the PCAOB.
We conducted our audits of these financial statements in accordance with the standards of the PCAOB. Those standards require that we plan and perform the audit to obtain reasonable assurance about whether the financial statements are free of material misstatement, whether due to error or fraud.
Our audits included performing procedures to assess the risks of material misstatement of the financial statements, whether due to error or fraud, and performing procedures that respond to those risks. Such procedures included examining, on a test basis, evidence regarding the amounts and disclosures in the financial statements. Our audits also included evaluating the accounting principles used and significant estimates made by management, as well as evaluating the overall presentation of the financial statements. Our procedures included confirmation of securities owned as of February 29, 2020 by correspondence with the custodian, transfer agent and brokers. We believe that our audits provide a reasonable basis for our opinion.
/s/PricewaterhouseCoopers LLP
Minneapolis, Minnesota
April 22, 2020
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
32 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

 Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended February 29, 2020. Shareholders will be notified in early 2021 of the amounts for use in preparing 2020 income tax returns.
Qualified
dividend
income
Dividends
received
deduction
Capital
gain
dividend
100.00% 100.00% $42,745,135
Qualified dividend income. For taxable, non-corporate shareholders, the percentage of ordinary income distributed during the fiscal year that represents qualified dividend income subject to reduced tax rates.
Dividends received deduction. The percentage of ordinary income distributed during the fiscal year that qualifies for the corporate dividends received deduction.
Capital gain dividend. The Fund designates as a capital gain dividend the amount reflected above, or if subsequently determined to be different, the net capital gain of such fiscal period.
 TRUSTEES AND OFFICERS
The Board oversees the Fund’s operations and appoints officers who are responsible for day-to-day business decisions based on policies set by the Board. The following table provides basic biographical information about the Fund’s Trustees as of the printing of this report, including their principal occupations during the past five years, although specific titles for individuals may have varied over the period. Under current Board policy, Trustees not affiliated with the Investment Manager generally may serve through the end of the calendar year in which they reach the mandatory retirement age established by the Board.
Independent trustees
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1953
Trustee since 1/17 Executive Vice President, Global Head of Technology and Operations, Janus Capital Group, Inc., 2010-2016 117 Former Chairman of the Board, NICSA (National Investment Company Services Association) (Executive Committee, Nominating Committee and Governance Committee), 2014-2016; former Director, Intech Investment Management, 2011-2016; former Board Member, Metro Denver Chamber of Commerce, 2015-2016; former Advisory Board Member, University of Colorado Business School, 2015-2018
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
33

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 1/06 for RiverSource Funds and since 6/11 for Nations Funds Attorney; specializing in arbitration and mediation; Chief Justice, Minnesota Supreme Court, 1998-2006; Associate Justice, Minnesota Supreme Court, 1996-1998; Fourth Judicial District Court Judge, Hennepin County, 1994-1996; Attorney in private practice and public service, 1984-1993; State Representative, Minnesota House of Representatives, 1979-1993, which included service on the Tax and Financial Institutions and Insurance Committees; Member and Interim Chair, Minnesota Sports Facilities Authority, January 2017-July 2017; Interim President and Chief Executive Officer, Blue Cross and Blue Shield of Minnesota (health care insurance), February-July 2018 117 Trustee, BlueCross BlueShield of Minnesota since 2009 (Chair of the Business Development Committee, 2014-2017; Chair of the Governance Committee since 2017); Chair of the Robina Foundation since August 2013; former Member and Chair of the Board, Minnesota Sports Facilities Authority, January 2017-July 2017
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 7/07 for RiverSource Funds and since 6/11 for Nations Funds President, Springboard — Partners in Cross Cultural Leadership (consulting company) since 2003; Managing Director of US Equity Research, JP Morgan Chase, 1999-2003; Director of US Equity Research, Chase Asset Management, 1996-1999; Co-Director Latin America Research, 1993-1996, COO Global Research, 1992-1996, Co-Director of US Research, 1991-1992, Investment Banker, Morgan Stanley, 1982-1991 117 Trustee, New York Presbyterian Hospital Board (Executive Committee and Chair of Human Resources Committee) since 1996; Director, DR Bank (Audit Committee) since 2017; Director, Evercore Inc. (Audit Committee, Nominating and Governance Committee) since 2019
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1950
Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Trustee Professor of Economics and Management, Bentley University since 1976 (also teaches and conducts research on corporate governance); Dean, McCallum Graduate School of Business, Bentley University, 1992-2002 117 Trustee, MA Taxpayers Foundation since 1997; Board of Governors, Innovation Institute, MA Technology Collaborative since 2010; Board of Directors, The MA Business Roundtable 2003-2019
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1954
Trustee since 12/17 Retired; Partner with Deloitte & Touche LLP and its predecessors, 1977-2016 117 Trustee, Catholic Schools Foundation since 2004
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1952
Chair of the Board since 1/20; Trustee since 11/04 for RiverSource Funds and since 6/11 for Nations Funds Director, Enterprise Asset Management, Inc. (private real estate and asset management company) since September 1998; Managing Director and Partner, Interlaken Capital, Inc., 1989-1997; Managing Director, Morgan Stanley, 1982-1989; Vice President, Investment Banking, 1980-1982, Associate, Investment Banking, 1976-1980, Dean Witter Reynolds, Inc. 117 Director, Valmont Industries, Inc. (irrigation systems manufacturer) since 2012; Trustee, Carleton College (on the Investment Committee); Trustee, Carnegie Endowment for International Peace (on the Investment Committee)
34 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Independent trustees  (continued)
Name,
address,
year of birth
Position held
with the Trust and
length of service
Principal occupation(s)
during past five years
and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex
overseen
Other directorships
held by Trustee
during the past
five years
Anthony M. Santomero
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1946
Trustee since 6/11 for RiverSource Funds and since 1/08 for Nations Funds Richard K. Mellon Professor Emeritus of Finance, The Wharton School, University of Pennsylvania, since 2002; Senior Advisor, McKinsey & Company (consulting), 2006-2008; President, Federal Reserve Bank of Philadelphia, 2000- 2006; Professor of Finance, The Wharton School, University of Pennsylvania, 1972-2002 117 Trustee, Penn Mutual Life Insurance Company since March 2008; Director, Renaissance Reinsurance Ltd. since May 2008; former Director, Citigroup Inc. and Citibank, N.A., 2009-2019; former Trustee, BofA Funds Series Trust (11 funds), 2008-2011
Minor M. Shaw
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1947
Trustee since 6/11 for RiverSource Funds and since 2003 for Nations Funds President, Micco LLC (private investments) since 2011; President, Micco Corp. (family investment business), 1998-2011 117 Director, BlueCross BlueShield of South Carolina since April 2008; Trustee, Hollingsworth Funds since 2016 (previously Board Chair from 2016-2019); Advisory Board member, Duke Energy Corp. since October 2016; Chair of the Duke Endowment; Chair of Greenville – Spartanburg Airport Commission; former Trustee, BofA Funds Series Trust (11 funds), 2003-2011; former Director, Piedmont Natural Gas, 2004-2016; former Director, National Association of Corporate Directors, Carolinas Chapter, 2013-2018
Sandra Yeager
c/o Columbia Management
Investment Advisers, LLC
225 Franklin Street
Mail Drop BX32 05228
Boston, MA 02110
1964
Trustee since 12/17 Retired; President and founder, Hanoverian Capital, LLC (SEC registered investment advisor firm), 2008-2016; Managing Director, DuPont Capital, 2006-2008; Managing Director, Morgan Stanley Investment Management, 2004-2006; Senior Vice President, Alliance Bernstein, 1990-2004 115 Director, NAPE Education Foundation since October 2016
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
35

TRUSTEES AND OFFICERS  (continued)
 
Interested trustee affiliated with Investment Manager*
Name,
address,
year of birth
Position held with the Trust and length of service Principal occupation(s) during the
past five years and other relevant
professional experience
Number of
Funds in the
Columbia Funds
Complex overseen
Other directorships
held by Trustee
during the past
five years
William F. Truscott
c/o Columbia Management
Investment Advisers, LLC
225 Franklin St.
Boston, MA 02110
1960
Trustee since 11/01 for RiverSource Funds and since 6/11 for Nations Funds; Senior Vice President since 2002 for RiverSource Funds and since 5/10 for Nations Funds Chief Executive Officer, Global Asset Management, Ameriprise Financial, Inc. since September 2012; Chairman of the Board and President, Columbia Management Investment Advisers, LLC since July 2004 and February 2012, respectively; Chairman of the Board and Chief Executive Officer, Columbia Management Investment Distributors, Inc. since November 2008 and February 2012, respectively; Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl since March 2013 and December 2008, respectively; senior executive of various entities affiliated with Columbia Threadneedle 185 Trustee, Columbia Funds since November 2001
* Interested person (as defined under the 1940 Act) by reason of being an officer, director, security holder and/or employee of the Investment Manager or Ameriprise Financial.
Nations Funds refer to the Funds within the Columbia Funds Complex that historically bore the Nations brand and includes series of Columbia Funds Series Trust. RiverSource Funds refer to the Funds within the Columbia Funds Complex that historically bore the RiverSource brand and includes series of Columbia Funds Series Trust II.
The Statement of Additional Information has additional information about the Fund’s Board members and is available, without charge, upon request by calling 800.345.6611, visiting columbiathreadneedleus.com/investor/ or contacting your financial intermediary.
The Board has appointed officers who are responsible for day-to-day business decisions based on policies it has established. The officers serve at the pleasure of the Board. The following table provides basic information about the Officers of the Fund as of the printing of this report, including principal occupations during the past five years, although their specific titles may have varied over the period. In addition to Mr. Truscott, who is Senior Vice President, the Fund’s other officers are:
Fund officers
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Christopher O. Petersen
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1970
President and Principal Executive Officer (2015) Vice President and Lead Chief Counsel, Ameriprise Financial, Inc. since January 2015 (previously Vice President and Chief Counsel, January 2010 - December 2014); officer of Columbia Funds and affiliated funds since 2007.
Michael G. Clarke
225 Franklin Street
Boston, MA 02110
Born 1969
Chief Financial Officer, Principal Financial Officer (2009), and Senior Vice President (2019) Vice President, Head of North American Operations, and Co-Head of Global Operations, – Accounting and Tax, Columbia Management Investment Advisers, LLC, since June 2019 (previously Vice President – Accounting and Tax, May 2010 – May 2019); senior officer of Columbia Funds and affiliated funds since 2002 (previously, Treasurer and Chief Accounting Officer, January 2009 – January 2019 and December 2015 – January 2019, respectively).
Joseph Beranek
5890 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1965
Treasurer, Chief Accounting Officer (Principal Accounting Officer) (2019), and Principal Financial Officer (2020) Vice President — Mutual Fund Accounting and Financial Reporting, Columbia Management Investment Advisers, LLC, since December 2018 and March 2017, respectively (previously Vice President — Pricing and Corporate Actions, May 2010 - March 2017).
36 Columbia Large Cap Enhanced Core Fund  | Annual Report 2020

TRUSTEES AND OFFICERS  (continued)
 
Fund officers  (continued)
Name,
address and
year of birth
Position and year
first appointed to
position for any Fund
in the Columbia
Funds Complex or a
predecessor thereof
Principal occupation(s) during past five years
Paul B. Goucher
485 Lexington Avenue
New York, NY 10017
Born 1968
Senior Vice President (2011) and Assistant Secretary (2008) Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc. since January 2017 (previously Vice President and Lead Chief Counsel, November 2008 - January 2017 and January 2013 - January 2017, respectively); Vice President, Chief Legal Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC since March 2015 (previously Vice President and Assistant Secretary, May 2010 – March 2015).
Thomas P. McGuire
225 Franklin Street
Boston, MA 02110
Born 1972
Senior Vice President and Chief Compliance Officer (2012) Vice President — Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief Compliance Officer, Ameriprise Certificate Company since September 2010; Chief Compliance Officer, Columbia Acorn/Wanger Funds since December 2015.
Colin Moore
225 Franklin Street
Boston, MA 02110
Born 1958
Senior Vice President (2010) Executive Vice President and Global Chief Investment Officer, Ameriprise Financial, Inc., since July 2013; Executive Vice President and Global Chief Investment Officer, Columbia Management Investment Advisers, LLC since July 2013.
Ryan C. Larrenaga
225 Franklin Street
Boston, MA 02110
Born 1970
Senior Vice President (2017), Chief Legal Officer (2017), and Secretary (2015) Vice President and Chief Counsel, Ameriprise Financial, Inc. since August 2018 (previously Vice President and Group Counsel, August 2011 - August 2018); officer of Columbia Funds and affiliated funds since 2005.
Daniel J. Beckman
225 Franklin Street
Boston, MA 02110
Born 1962
Senior Vice President (2020) Vice President – Head of North America Product, Columbia Management Investment Advisers, LLC (since April 2015); previously, Senior Vice President of Investment Product Management, Fidelity Financial Advisor Solutions, a division of Fidelity Investments (January 2012 – March 2015).
Michael E. DeFao
225 Franklin Street
Boston, MA 02110
Born 1968
Vice President (2011) and Assistant Secretary (2010) Vice President and Chief Counsel, Ameriprise Financial, Inc. since May 2010.
Lyn Kephart-Strong
5228 Ameriprise
Financial Center
Minneapolis, MN 55474
Born 1960
Vice President (2015) President, Columbia Management Investment Services Corp. since October 2014; Vice President & Resolution Officer, Ameriprise Trust Company since August 2009.
Columbia Large Cap Enhanced Core Fund  | Annual Report 2020
37

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[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Large Cap Enhanced Core Fund
P.O. Box 219104
Kansas City, MO 64121-9104
  
Please read and consider the investment objectives, risks, charges and expenses for any fund carefully before investing. For a prospectus and summary prospectus, which contains this and other important information about the Fund, go to
columbiathreadneedleus.com/investor/. The Fund is distributed by Columbia Management Investment Distributors, Inc., member FINRA, and managed by Columbia Management Investment Advisers, LLC.
Columbia Threadneedle Investments (Columbia Threadneedle) is the global brand name of the Columbia and Threadneedle group of companies. All rights reserved.
© 2020 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN173_02_K01_(04/20)

Item 2. Code of Ethics.

(a)The registrant has adopted a code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party.

(b)During the period covered by this report, there were not any amendments to a provision of the code of ethics that applies to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party, and that relates to any element of the code of ethics definition enumerated in paragraph (b) of this Item.

(c)During the period covered by this report, there were no waivers, including any implicit waivers, from a provision of the code of ethics to the registrant's principal executive officer, principal financial officer, principal accounting officer or controller, or persons performing similar functions, regardless of whether these individuals are employed by the registrant or a third party that relates to one or more of the items set forth in paragraph (b) of this Item.

Item 3. Audit Committee Financial Expert.

The registrant's Board of Trustees has determined that Brian J. Gallagher, Pamela G. Carlton, Anthony M. Santomero, and Sandra L. Yeager, each of whom are members of the registrant's Board of Trustees and Audit Committee, each qualify as an audit committee financial expert. Mr. Gallagher, Ms. Carlton, Mr. Santomero, and Ms. Yeager are each independent trustees, as defined in paragraph (a)(2) of this item's instructions.

Item 4. Principal Accountant Fees and Services.

Fee information below is disclosed for the twelve series of the registrant whose reports to stockholders are included in this annual filing.

(a)Audit Fees. Aggregate Audit Fees billed by the principal accountant for professional services rendered during the fiscal years ended February 29, 2020 and February 28, 2019 are approximately as follows:

20202019

$348,000              $349,800

Audit Fees include amounts related to the audit of the registrant's annual financial statements or services that are normally provided by the accountant in connection with statutory and regulatory filings or engagements for those fiscal years.

 

(b)Audit-Related Fees. Aggregate Audit-Related Fees billed to the registrant by the principal accountant for professional services rendered during the fiscal years ended February 29, 2020 and February 28, 2019 are approximately as follows:

2020

2019

$7,500

$0

Audit-Related Fees include amounts for assurance and related services by the principal accountant that are reasonably related to the performance of the audit of the registrant's financial statements and are not reported in Audit Fees above.

During the fiscal years ended February 29, 2020 and February 28, 2019 , there were no Audit-Related Fees billed by the registrant's principal accountant to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser) and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for an engagement that related directly to the operations and financial reporting of the registrant.

(c)Tax Fees. Aggregate Tax Fees billed by the principal accountant to the registrant for professional services rendered during the fiscal years ended February 29, 2020 and February 28, 2019 are approximately as follows:

2020

2019

$5,820

$72,900

Tax Fees include amounts for the review of annual tax returns, the review of required shareholder distribution calculations and typically include amounts for professional services by the principal accountant for tax compliance, tax advice and tax planning. Fiscal year 2020 also includes fees paid for foreign tax services.

During the fiscal years ended February 29, 2020 and February 28, 2019 , there were no Tax Fees billed by the registrant's principal accountant to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser) and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for an engagement that related directly to the operations and financial reporting of the registrant.

(d)All Other Fees. Aggregate All Other Fees billed by the principal accountant to the registrant for professional services rendered during the fiscal years ended February 29, 2020 and February 28, 2019 are approximately as follows:

2020

2019

$0

$0

 

All Other Fees include amounts for products and services provided by the principal accountant, other than the services reported in paragraphs (a) through (c) above.

Aggregate All Other Fees billed by the registrant's principal accountant to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser) and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for an engagement that related directly to the operations and financial reporting of the registrant during the fiscal years ended February 29, 2020 and February 28, 2019 are approximately as follows:

20202019

$225,000            $225,000

In fiscal years 2020 and 2019, All Other Fees primarily consists of fees billed for internal control examinations of the registrant's transfer agent and investment adviser.

(e)(1) Audit Committee Pre-Approval Policies and Procedures

The registrant's Audit Committee is required to pre-approve the engagement of the registrant's independent auditors to provide audit and non-audit services to the registrant and non-audit services to its investment adviser (excluding any sub-adviser whose role is primarily portfolio management and is sub-contracted or overseen by another investment adviser (the "Adviser") or any entity controlling, controlled by or under common control with the Adviser that provides ongoing services to the Fund (a "Control Affiliate") if the engagement relates directly to the operations and financial reporting of the registrant.

The Audit Committee has adopted a Policy for Engagement of Independent Auditors for Audit and Non-Audit Services (the "Policy"). The Policy sets forth the understanding of the Audit Committee regarding the engagement of the registrant's independent accountants to provide (i) audit and permissible audit-related, tax and other services to the registrant ("Fund Services"); (ii) non-audit services to the registrant's Adviser and any Control Affiliates, that relates directly to the operations and financial reporting of a Fund ("Fund-related Adviser Services"); and (iii) certain other audit and non-audit services to the registrant's Adviser and its Control Affiliates. A service will require specific pre-approval by the Audit Committee if it is to be provided by the Fund's independent auditor; provided, however, that pre-approval of non-audit services to the Fund, the Adviser or Control Affiliates may be waived if certain de minimis requirements set forth in the SEC's rules are met.

Under the Policy, the Audit Committee may delegate pre-approval authority to any pre- designated member or members who are independent board members. The member(s) to whom such authority is delegated must report, for informational purposes only, any pre- approval decisions to the Audit Committee at its next regular meeting. The Audit Committee's responsibilities with respect to the pre-approval of services performed by the independent auditor may not be delegated to management.

 

On an annual basis, at a regularly scheduled Audit Committee meeting, the Fund's Treasurer or other Fund officer shall submit to the Audit Committee a schedule of the types of Fund Services and Fund-related Adviser Services that are subject to specific pre- approval. This schedule will provide a description of each type of service that is subject to specific pre-approval, along with total projected fees for each service. The pre- approval will generally cover a one-year period. The Audit Committee will review and approve the types of services and the projected fees for the next one-year period and may add to, or subtract from, the list of pre-approved services from time to time, based on subsequent determinations. This specific approval acknowledges that the Audit Committee is in agreement with the specific types of services that the independent auditor will be permitted to perform and the projected fees for each service.

The Fund's Treasurer or other Fund officer shall report to the Audit Committee at each of its regular meetings regarding all Fund Services or Fund-related Adviser Services provided since the last such report was rendered, including a description of the services, by category, with forecasted fees for the annual reporting period, proposed changes requiring specific pre-approval and a description of services provided by the independent auditor, by category, with actual fees during the current reporting period.

*****

(e)(2) 100% of the services performed for items (b) through (d) above during 2020 and 2019 were pre-approved by the registrant's Audit Committee.

(f)Not applicable.

(g)The aggregate non-audit fees billed by the registrant's accountant for services rendered to the registrant, and rendered to the registrant's investment adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the adviser that provides ongoing services to the registrant for the fiscal years ended February 29, 2020 and February 28, 2019 are approximately as follows:

20202019

$238,300               $297,900

(h)The registrant's Audit Committee of the Board of Directors has considered whether the provision of non-audit services that were rendered to the registrant's adviser (not including any sub-adviser whose role is primarily portfolio management and is subcontracted with or overseen by another investment adviser), and any entity controlling, controlled by, or under common control with the investment adviser that provides ongoing services to the registrant that were not pre-approved pursuant to paragraph (c)(7)(ii) of Rule 2-01 of Regulation S-X, is compatible with maintaining the principal accountant's independence.

Item 5. Audit Committee of Listed Registrants.

 

Not applicable.

Item 6. Investments

(a)The registrant's "Schedule I – Investments in securities of unaffiliated issuers" (as set forth in 17 CFR 210.12-12) is included in Item 1 of this Form N-CSR.

(b)Not applicable.

Item 7. Disclosure of Proxy Voting Policies and Procedures for Closed-End Management Investment Companies.

Not applicable.

Item 8. Portfolio Managers of Closed-End Management Investment Companies.

Not applicable.

Item 9. Purchases of Equity Securities by Closed-End Management Investment Company and Affiliated Purchasers.

Not applicable.

Item 10. Submission of Matters to a Vote of Security Holders.

There were no material changes to the procedures by which shareholders may recommend nominees to the registrant's board of directors.

Item 11. Controls and Procedures.

(a)The registrant's principal executive officer and principal financial officer, based on their evaluation of the registrant's disclosure controls and procedures as of a date within 90 days of the filing of this report, have concluded that such controls and procedures are adequately designed to ensure that information required to be disclosed by the registrant in Form N-CSR is accumulated and communicated to the registrant's management, including the principal executive officer and principal financial officer, or persons performing similar functions, as appropriate to allow timely decisions regarding required disclosure.

(b)There was no change in the registrant's internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting.

Item 12. Disclosure of Securities Lending Activities for Closed-End Management Investment Companies

 

Not applicable.

Item 13. Exhibits.

(a)(1) Code of ethics required to be disclosed under Item 2 of Form N-CSR attached hereto as Exhibit 99.CODE ETH.

(a)(2) Certifications pursuant to Rule 30a-2(a) under the Investment Company Act of 1940 (17 CFR 270.30a-2(a)) attached hereto as Exhibit 99.CERT.

(a)(3) Not applicable.

(b)Certification pursuant to Rule 30a-2(b) under the Investment Company Act of 1940(17 CFR 270.30a-2(b)) attached hereto as Exhibit 99.906CERT.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, the registrant has duly caused this report to be signed on its behalf by the undersigned, thereunto duly

authorized.

 

 

(registrant)

 

Columbia Funds Series Trust

 

By (Signature and Title)

/s/ Christopher O. Petersen

 

 

 

Christopher O. Petersen, President and Principal Executive Officer

Date

 

April 29, 2020

 

Pursuant to the requirements of the Securities Exchange Act of 1934 and the Investment Company Act of 1940, this report has been signed below by the following persons on behalf of the registrant and in the capacities and on the dates indicated.

By (Signature and Title)

/s/ Christopher O. Petersen

 

 

Christopher O. Petersen, President and Principal Executive Officer

Date

 

April 29, 2020

 

By (Signature and Title)

/s/ Michael G. Clarke

 

 

Michael G. Clarke, Chief Financial Officer, Principal Financial Officer

 

 

and Senior Vice President

Date

 

April 29, 2020

 

By (Signature and Title)

/s/ Joseph Beranek

 

 

Joseph Beranek, Treasurer, Chief Accounting Officer and Principal

 

 

Financial Officer

Date

 

April 29, 2020

 

Fund Policy: Code of Ethics for Principal Executive / Senior Financial Officers

 

COLUMBIA FUNDS

 

 

 

Applicable Regulatory Authority

 

Section 406 of the Sarbanes-Oxley Act of 2002;

 

 

Item 2 of Form N-CSR

Related Policies

 

Overview and Implementation of Compliance Program

 

 

Policy

Requires Annual Board Approval

 

No but Covered Officers Must provide annual

 

 

certification

Last Reviewed by AMC

 

July 2019

Overview and Statement

Item 2 of Form N-CSR, the form used by registered management investment companies to file certified annual and semi-annual shareholder reports, requires a registered management investment company to disclose:

Whether it has adopted a code of ethics that applies to the investment company's principal executive officer and senior financial officers and, if it has not adopted such a code of ethics, why it has not done so; and

Any amendments to, or waivers from, the code of ethics relating to such officers.

The Board of each Fund has adopted the following Code of Ethics for Principle Executive and Senior Financial Officers (the "Code"), which sets forth the ethical standards to which the Fund holds its principal executive officer and each of its senior financial officers.

This Code should be read and interpreted in conjunction with the Overview and Implementation of Compliance Program Policy.

Policy The Board of each Fund has adopted the Code in order to comply with applicable regulatory requirements as outlined below:

I.Covered Officers/Purpose of the Code

This Code applies to the Fund's Principal Executive Officer, Principal Financial Officer, and Principal Accounting Officer or Controller (the "Covered Officers") for the purpose of promoting:

Honest and ethical conduct, including the ethical handling of actual or apparent conflicts of interest between personal and professional relationships;

Full, fair, accurate, timely and understandable disclosure in reports and documents that the Fund files with, or submits to, the SEC, and in other public communications made by the Fund;

Compliance with applicable laws and governmental rules and regulations;

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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Fund Policy: Code of Ethics for Principal Executive / Senior Financial Officers

The prompt internal reporting of violations of the Code to an appropriate person or persons identified in the Code; and

Accountability for adherence to the Code.

Each Covered Officer should adhere to a high standard of business ethics and should be sensitive to situations that may give rise to actual or apparent conflicts of interest.

II.Administration of the Code

The Board has designated an individual to be primarily responsible for the administration of the Code (the "Code Officer"). In the absence of the Code Officer, his or her designee shall serve as the Code Officer, but only on a temporary basis.

The Board has designated a person who meets the definition of a Chief Legal Officer (the "CLO") for purposes of the Sarbanes-Oxley Act of 2002 and the rules promulgated thereunder as the Fund's CLO. The CLO of the Fund shall assist the Fund's Code Officer in administration of this Code. The Code Officer, in consultation with the CLO, shall be responsible for applying this Code to specific situations (in consultation with Fund counsel, where appropriate) and has the authority to interpret this Code in any particular situation.

III.Managing Conflicts of Interest

A "conflict of interest" occurs when a Covered Officer's personal interest interferes with the interests of, or his or her service to, the Fund. For example, a conflict of interest would arise if a Covered Officer, or a member of his or her family, receives improper personal benefits as a result of the Covered Officer's position with the Fund. Certain provisions in the 1940 Act and the rules and regulations thereunder and the Advisers Act and the rules and regulations thereunder govern certain conflicts of interest that arise out of the relationships between Covered Officers and the Fund. If such conflicts are addressed in conformity with applicable provisions of the 1940 Act and the Advisers Act, they will be deemed to have been handled ethically. The Fund's and its Adviser's compliance programs and procedures are designed to prevent, or identify and correct, violations of those provisions. This Code does not, and is not intended to, repeat or replace those programs and procedures, and conduct that is consistent with such programs and procedures falls outside of the parameters of this Code.

Although they do not typically present an opportunity for improper personal benefit, conflicts may arise from, or as a result of, the contractual relationships between the Fund and, as applicable, its Adviser, administrator, principal underwriter, pricing and bookkeeping agent and/or transfer agent (each, a "Primary Service Provider") of which the

Covered Officers are also officers or employees. As a result, this Code recognizes that the Covered Officers will, in the normal course of their duties (whether formally for the Fund or for a Primary Service Provider, or for both), be involved in establishing policies and implementing decisions that will have different effects on the Primary Service Providers and the Fund. The participation of the Covered Officers in such activities is inherent in the

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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contractual relationships between the Fund and the Primary Service Providers and is consistent with the performance by the Covered Officers of their duties as officers of the Fund. If such conflicts are addressed in conformity with applicable provisions of the 1940 Act and the Advisers Act, they will be deemed to have been handled ethically. In addition, it is recognized by the Board of the Fund that the Covered Officers also may be officers or employees of one or more other investment companies or organizations affiliated with the sponsor of the Fund covered by other similar codes and that the codes of ethics of those other investment companies or organizations will apply to the Covered Officers acting in such capacities for such other investment companies.

This Code covers general conflicts of interest and other issues applicable to the Funds under the Sarbanes-Oxley Act of 2002. The overarching principle is that the personal interest of a Covered Officer should not be placed improperly before the interests of the Fund. Certain examples of such conflicts of interest follow.

Each Covered Officer must:

Not use his or her personal influence or personal relationships improperly to influence investment decisions or financial reporting by the Fund whereby the Covered Officer, or a member of his or her family, would knowingly benefit personally to the detriment of the Fund;

Not knowingly cause the Fund to take action, or fail to take action, for the individual personal benefit of the Covered Officer, or a member of his or her family, rather than the benefit of the Fund;

Not use material non-public knowledge of portfolio transactions made or contemplated for the Fund to trade personally or cause others to trade personally in contemplation of the market effect of such transactions; and

Report at least annually (or more frequently, as appropriate) known affiliations or other relationships that may give rise to conflicts of interest with respect to the Fund.

If a Covered Officer believes that he or she has a potential conflict of interest that is likely to materially compromise his or her objectivity or his or her ability to perform the duties of his or her role as a Covered Officer, including a potential conflict of interest that arises out of his or her responsibilities as an officer or employee of one or more Primary Service Providers or other funds, he or she should consult with the Code Officer, the CLO, the Fund's outside counsel, or counsel to the Independent Board Members, as appropriate.

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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Fund Policy: Code of Ethics for Principal Executive / Senior Financial Officers

Examples of potential conflicts of interest that may materially compromise objectivity or ability to perform the duties of a Covered Officer and which the Covered Officer should consider discussing with the Code Officer or other appropriate person include:

Service as a director on the board of a public or private company or service as a public official;

The receipt of a non-de minimus gift when the gift is in relation to doing business directly or indirectly with the Fund;

The receipt of entertainment from any company with which the Fund has current or prospective business dealings, unless such entertainment is business-related, reasonable in cost, appropriate as to time and place, and not so frequent as to raise any question of impropriety;

An ownership interest in, or any consulting or employment relationship with, any of the Fund's service providers, other than the Primary Service Providers or any affiliated person thereof; and

A direct or indirect material financial interest in commissions, transaction charges or spreads paid by the Fund for effecting portfolio transactions or for selling or redeeming shares other than an interest arising from the Covered Officer's employment, such as compensation or equity ownership.

IV. Disclosure and Compliance

It is the responsibility of each Covered Officer:

To familiarize himself or herself with the disclosure requirements generally applicable to the Fund, as well as the business and financial operations of the Fund;

To not knowingly misrepresent, and to not knowingly cause others to misrepresent, facts about the Fund to others, whether within or outside the Fund, including to the Fund's Board, Legal Counsel, Independent Legal Counsel and auditors, and to governmental regulators and self-regulatory organizations;

To the extent appropriate within his or her area of responsibility, consult with other officers and employees of the Fund and the Primary Service Providers with the goal of promoting full, fair, accurate, timely and understandable disclosure in the reports and documents the Fund files with, or submits to, the SEC and in other public communications made by the Fund; and

To adhere to and, within his or her area of responsibility, promote compliance with the standards and restrictions imposed by applicable laws, rules and regulations.

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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Fund Policy: Code of Ethics for Principal Executive / Senior Financial Officers

V.Reporting and Accountability by Covered Officers Each Covered Officer must:

Upon adoption of the Code or becoming a Covered Officer, acknowledge in writing to the Fund's Board that he or she has received, read and understands the Code, using the form attached as Appendix A hereto;

Annually thereafter acknowledge in writing to the Fund's Board that he or she has received and read the Code and believes that he or she has complied with the requirements of the Code, using the form attached as Appendix B hereto;

Not retaliate against any employee or Covered Officer for reports of potential violations that are made in good faith; and

Notify the Code Officer promptly if he or she knows of any violation, or of conduct that reasonably could be expected to be or result in a violation, of this Code. Failure to do so is a violation of this Code.

The Fund will follow the policy set forth below in investigating and enforcing this Code:

The Code Officer will endeavor to take all appropriate action to investigate any potential violation reported to him or her;

If, after such investigation, the Code Officer believes that no violation has occurred, the Code Officer will so notify the person(s) reporting the potential violation, and no further action is required;

Any matter that the Code Officer, upon consultation with the CLO, believes is a violation will be reported by the Code Officer or the CLO to the Fund's Audit

Committee;

The Fund's Audit Committee will be responsible for granting waivers, as appropriate; and

This Code and any changes to or waivers of the Code will, to the extent required, be disclosed as provided by SEC rules.

VI. Other Policies

This Code shall be the sole code of ethics adopted by the Fund for the purposes of Section 406 of the Sarbanes-Oxley Act of 2002 and the rules and forms applicable to registered management investment companies thereunder. Insofar as other policies or procedures of the Fund or the Fund's Primary Service Providers govern or purport to govern the behavior or activities of the Covered Officers who are subject to this Code, they are superseded by this Code to the extent that they conflict with the provisions of this Code. The Fund's and its Adviser's and principal underwriter's codes of ethics under Rule 17j-1 under the 1940 Act and the more detailed policies and procedures of the Primary Service Providers as set

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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forth in their respect Compliance Manuals are separate requirements applicable to the Covered Officers and are not part of this Code.

VII. Disclosure of Amendments to the Code

Any amendments will, to the extent required, be disclosed in accordance with law.

VIII. Confidentiality

All reports and records prepared or maintained pursuant to this Code will be considered confidential and shall be maintained and protected accordingly. Except as otherwise required by law or this Code or upon advice of counsel, such reports and records shall not be disclosed to anyone other than the Fund's Board, the Covered Officers, the Code Officer, the CLO, the Fund's Primary Service Providers and their affiliates, and outside audit firms, legal counsel to the Fund and legal counsel to the Independent Board Members.

IX. Internal Use

The Code is intended solely for the internal use by the Fund and does not constitute an admission, by or on behalf of the Fund, as to any fact, circumstance, or legal conclusion.

Reporting Requirements

Each Covered Officer must annually acknowledge in writing to the Fund's Board that he or she has received and read the Code and believes that he or she has complied with the requirements of the Code, using the form attached as Appendix II hereto.

The Code Officer or CLO shall report to the Fund's Audit Committee any violations of, or material issues arising under, this Code.

If the Audit Committee concurs that a violation has occurred, it will inform and make a recommendation to the Fund's Board, which will consider appropriate action, which may include review of, and appropriate modifications to: Applicable policies and procedures; Notification to the appropriate personnel of the Fund's Primary Service Providers or their boards; A recommendation to censure, suspend or dismiss the Covered Officer; or Referral of the matter to the appropriate authorities for civil action or criminal prosecution.

All material amendments to this Code must be in writing and approved or ratified by the Fund's Board, including a majority of the Independent Board Members.

The Code Officer, in conjunction with the CLO, shall be responsible for administration of this Code and for adopting procedures to ensure compliance with the requirements set forth herein.

Any issues that arise under this policy should be communicated to an employee's immediate supervisor, and appropriately escalated to AMC. Additionally, AMC will escalate any compliance issues relating to this Code to the Fund CCO and, if warranted, the appropriate Fund Board.

Monitoring/Oversight/Escalation

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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The Code Officer shall be responsible for oversight of compliance with this Code by the Covered Officers. AMC and Ameriprise Risk & Control Services may perform periodic reviews and assessments of various lines of business, including their compliance with this Code.

Recordkeeping

All records must be maintained for at least seven years, the first three in the appropriate Ameriprise Financial, Inc. management office. The following records will be maintained to evidence compliance with this Code: (1) a copy of the information or materials supplied to the Audit Committee or the Board: (i) that provided the basis for any amendment or waiver to this Code; and

(ii)relating to any violation of the Code and sanctions imposed for such violation, together with a written record of the approval or action taken by the Audit Committee and/or Board; (2) a copy of the policy and any amendments; and (3) a list of Covered Officers and reporting by Covered Officers.

This document is current as of the last review date but subject to change thereafter. Please consult the online version to verify that this Fund Policy has not been updated or otherwise changed. This Fund Policy is the property of the Funds and must not be provided to any external party without express prior consent from the Fund CCO.

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Appendix A

INITIAL ACKNOWLEDGEMENT

I acknowledge that I have received and read a copy of the Code of Ethics for Principal Executive and Senior Financial Officers (the "Code") and that I understand it. I further acknowledge that I am responsible for understanding and complying with the policies set forth in the Code during my tenure as a Covered Officer, as defined in the Code.

I have set forth below (and on attached sheets of paper, if necessary) all known affiliations or other relationships that may give rise to conflicts of interest for me with respect to the Fund.

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

I also acknowledge my responsibility to report any known violation of the Code to the Code Officer, the CLO, the Fund's outside counsel, or counsel to the Independent Board Members, all as defined in this Code. I further acknowledge that the policies contained in the Code are not intended to create any contractual rights or obligations, express or implied. I also understand that, consistent with applicable law, the Fund has the right to amend, interpret, modify or withdraw any of the provisions of the Code at any time in its sole discretion, with or without notice.

Covered Officer Name and Title: ________________________________________________

(please print)

______________________________________________________________________________

Signature

Date

Please return this completed form to the CLO (_______) within one week from the date of your review of these documents. Thank you!

Appendix B

ANNUAL ACKNOWLEDGEMENT

I acknowledge that I have received and read a copy of the Code of Ethics for Principal Executive and Senior Financial Officers (the "Code") and that I understand it. I further acknowledge that I am responsible for understanding and complying with the policies set forth in the Code during my tenure as a Covered Officer, as defined in the Code.

I also acknowledge that I believe that I have fully complied with the terms and provisions of the Code during the period of time since the most recent Initial or Annual Acknowledgement provided by me except as described below.

______________________________________________________________

______________________________________________________________

______________________________________________________________

I have set forth below (and on attached sheets of paper, if necessary) all known affiliations or other relationships that may give rise to conflicts of interest for me with respect to the Fund.1

______________________________________________________________

______________________________________________________________

______________________________________________________________

______________________________________________________________

I further acknowledge that the policies contained in the Code are not intended to create any contractual rights or obligations, express or implied. I also understand that, consistent with applicable law, the Fund has the right to amend, interpret, modify or withdraw any of the provisions of the Code at any time in its sole discretion, with or without notice.

Covered Officer Name and Title: ________________________________________________

(please print)

______________________________________________________________________________

Signature

Date

Please return this completed form to the CLO (_______) within one week from the date of your receipt of a request to complete and return it. Thank you!

1It is acceptable to refer to affiliations and other relationships previously disclosed in prior Initial or Annual Acknowledgements without setting forth such affiliations and relationships again.

I, Christopher O. Petersen, certify that:

1.I have reviewed this report on Form N-CSR of Columbia Funds Series Trust;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a)designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

(d)disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and

(b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 29, 2020

/s/ Christopher O. Petersen

 

 

Christopher O. Petersen, President and Principal

 

Executive Officer

I, Michael G. Clarke, certify that:

1.I have reviewed this report on Form N-CSR of Columbia Funds Series Trust;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a)designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)designed such internal control over financial reporting, or caused such internal control over financial reporting to be designed under our supervision, to provide reasonable assurance regarding the reliability of financial reporting and the preparation of financial statements for external purposes in accordance with generally accepted accounting principles;

(c)evaluated the effectiveness of the registrant's disclosure controls and procedures and presented in this report our conclusions about the effectiveness of the disclosure controls and procedures, as of a date within 90 days prior to the filing date of this report based on such evaluation; and

(d)disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and

(b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 29, 2020

 

/s/ Michael G. Clarke

 

 

Michael G. Clarke, Chief Financial Officer,

 

Principal Financial Officer and Senior Vice

 

President

I, Joseph Beranek, certify that:

1.I have reviewed this report on Form N-CSR of Columbia Funds Series Trust;

2.Based on my knowledge, this report does not contain any untrue statement of a material fact or omit to state a material fact necessary to make the statements made, in light of the circumstances under which such statements were made, not misleading with respect to the period covered by this report;

3.Based on my knowledge, the financial statements, and other financial information included in this report, fairly present in all material respects the financial condition, results of operations, changes in net assets, and cash flows (if the financial statements are required to include a statement of cash flows) of the registrant as of, and for, the periods presented in this report;

4.The registrant's other certifying officer(s) and I are responsible for establishing and maintaining disclosure controls and procedures (as defined in Rule 30a-3(c) under the Investment Company Act of 1940) and internal control over financial reporting (as defined in Rule 30a-3(d) under the Investment Company Act of 1940) for the registrant and have:

(a)designed such disclosure controls and procedures, or caused such disclosure controls and procedures to be designed under our supervision, to ensure that material information relating to the registrant, including its consolidated subsidiaries, is made known to us by others within those entities, particularly during the period in which this report is being prepared;

(b)designed such internal control over financial reporting, or caused such internal control

 

over financial reporting to be designed under our supervision, to provide reasonable

 

assurance regarding the reliability of financial reporting and the preparation of financial

 

statements for external purposes in accordance with generally accepted accounting

 

principles;

(c )

evaluated the effectiveness of the registrant's disclosure controls and procedures and

 

presented in this report our conclusions about the effectiveness of the disclosure controls

 

and procedures, as of a date within 90 days prior to the filing date of this report based on

 

such evaluation; and

(d)disclosed in this report any change in the registrant's internal control over financial reporting that occurred during the period covered by this report that has materially affected, or is reasonably likely to materially affect, the registrant's internal control over financial reporting; and

5.The registrant's other certifying officer(s) and I have disclosed to the registrant's auditors and the audit committee of the registrant's board of directors (or persons performing the equivalent functions):

(a)all significant deficiencies and material weaknesses in the design or operation of internal control over financial reporting which are reasonably likely to adversely affect the registrant's ability to record, process, summarize, and report financial information; and

(b)any fraud, whether or not material, that involves management or other employees who have a significant role in the registrant's internal control over financial reporting.

Date: April 29, 2020

 

/s/ Joseph Beranek

 

 

Joseph Beranek, Treasurer, Chief Accounting

 

Officer and Principal Financial Officer

CERTIFICATION PURSUANT TO SECTION 906 OF

THE SARBANES-OXLEY ACT OF 2002

In connection with the Certified Shareholder Report of Columbia Funds Series Trust (the "Trust") on Form N-CSR for the period ending February 29, 2020 as filed with the Securities and Exchange Commission on the date hereof ("the Report"), the undersigned hereby certifies that, to his knowledge:

1.The Report fully complies with the requirements of Section 13(a) or 15(d) of the Securities Exchange Act of 1934; and

2.The information contained in the Report fairly presents, in all material respects, the financial condition and results of operations of the Trust.

Date:

April 29, 2020

/s/ Christopher O. Petersen

 

 

Christopher O. Petersen, President and Principal

 

 

Executive Officer

Date:

April 29, 2020

/s/ Michael G. Clarke

 

 

Michael G. Clarke, Chief Financial Officer,

 

 

Principal Financial Officer and Senior Vice

 

 

President

Date:

April 29, 2020

/s/ Joseph Beranek

 

 

Joseph Beranek, Treasurer, Chief Accounting

 

 

Officer and Principal Financial Officer

A signed original of this written statement required by Section 906 of the Sarbanes-Oxley Act of 2002 has been provided to the Registrant and will be retained by the Registrant and furnished to the Securities and Exchange Commission (the "Commission") or its staff upon request.

This certification is being furnished to the Commission solely pursuant to 18 U.S.C. §1350 and is not being filed as part of the Form N-CSR with the Commission.