UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549 

  

FORM N-CSR 

  

CERTIFIED SHAREHOLDER REPORT OF REGISTERED MANAGEMENT INVESTMENT COMPANIES 

  

Investment Company Act file number 811-09645 

  

Columbia Funds Series Trust  

  

(Exact name of registrant as specified in charter) 

  

290 Congress Street 

Boston, MA 02210 


(Address of principal executive offices) (Zip code) 

  

Daniel J. Beckman 

c/o Columbia Management Investment Advisers, LLC 

290 Congress Street 

Boston, MA 02210 

  

Ryan C. Larrenaga, Esq. 

c/o Columbia Management Investment Advisers, LLC 

290 Congress Street 

Boston, MA 02210 


(Name and address of agent for service) 

  

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

  

Date of fiscal year end:  March 31 

  

Date of reporting period:  March 31, 2024 

  

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. 


Columbia Short Term Bond Fund
Annual Report
March 31, 2024 
In October 2022, the Securities and Exchange Commission (SEC) adopted a final rule, "Tailored Shareholder Reports for Mutual Funds and Exchange-Traded Funds; Fee Information in Investment Company Advertisements." The rule and form amendments will, among other things, require the Fund to transmit concise and visually engaging shareholder reports that highlight key information. The amendments will require that funds tag information in a structured data format and that certain more in-depth information be made available online and available for delivery free of charge to investors on request. The amendments became effective January 24, 2023. There is an 18-month transition period after the effective date of the amendments.
Each Tailored Shareholder Report will be share-class specific and will highlight key fund information the SEC believes is most relevant to investors in assessing their investment in the Fund. Much of the information, including a Fund’s financial statements, that is currently disclosed in a Fund’s shareholder reports will instead be made available on the Fund’s website and filed on Form N-CSR on an annual and semiannual basis. This information will be delivered to investors free of charge upon request. Columbia Fund reports will follow the Tailored Shareholder Report approach beginning with reports covering the period ending May 31, 2024.
The new rule also requires the Fund to mail a printed version of the Tailored Shareholder Report to all shareholders who have not elected to receive shareholder reports electronically. Rather than receiving a postcard notifying investors that the shareholder report for Funds in which they invest is available online, investors will begin receiving the Tailored Shareholder Report in the mail unless they have elected to receive their Fund documents electronically.
Not FDIC or NCUA Insured
No Financial Institution Guarantee
May Lose Value

Table of Contents
If you elect to receive the shareholder report for Columbia Short Term Bond Fund (the Fund) in paper, mailed to you, the Fund mails one shareholder report to each shareholder address, unless such shareholder elects to receive shareholder reports from the Fund electronically via e-mail or by having a paper notice mailed to you (Postcard Notice) that your Fund’s shareholder report is available at the Columbia funds’ website (columbiathreadneedleus.com/investor/). If you would like more than one report in paper to be mailed to you, or would like to elect to receive reports via e-mail or access them through Postcard Notice, 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. The Fund’s 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-PORT, is available on columbiathreadneedleus.com/investor/ or 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)
290 Congress Street
Boston, MA 02210
Fund distributor
Columbia Management Investment Distributors, Inc.
290 Congress Street
Boston, MA 02210
Fund transfer agent
Columbia Management Investment Services Corp.
P.O. Box 219104
Kansas City, MO 64121-9104
Columbia Short Term Bond Fund | Annual Report 2024

Fund at a Glance
(Unaudited)
Investment objective
The Fund seeks current income, consistent with minimal fluctuation of principal.
Portfolio management
Gregory Liechty
Co-Portfolio Manager
Managed Fund since 2010
Ronald Stahl, CFA
Co-Portfolio Manager
Managed Fund since 2006
Average annual total returns (%) (for the period ended March 31, 2024)
 
 
Inception
1 Year
5 Years
10 Years
Class A
Excluding sales charges
10/02/92
5.93
1.91
1.44
 
Including sales charges
 
4.82
1.70
1.34
Advisor Class
11/08/12
6.20
2.18
1.69
Class C
Excluding sales charges
10/02/92
5.35
1.33
0.85
 
Including sales charges
 
4.35
1.33
0.85
Institutional Class
09/30/92
6.20
2.18
1.69
Institutional 2 Class
11/08/12
6.28
2.26
1.77
Institutional 3 Class
07/15/09
6.45
2.31
1.83
Class R
09/27/10
5.65
1.65
1.17
Bloomberg 1-3 Year
Government/Credit Index
 
3.49
1.36
1.29
Returns for Class A shares are shown with and without the maximum initial sales charge of 1.00%. 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 Bloomberg 1-3 Year Government/Credit Index consists of Treasury or government agency securities and investment-grade corporate debt securities with maturities of one to three years.
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.
Columbia Short Term Bond Fund  | Annual Report 2024
3

Fund at a Glance  (continued)
(Unaudited)
Performance of a hypothetical $10,000 investment (March 31, 2014 — March 31, 2024)
The chart above shows the change in value of a hypothetical $10,000 investment in Class A shares of Columbia Short Term Bond 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 March 31, 2024)
Asset-Backed Securities - Non-Agency
24.5
Commercial Mortgage-Backed Securities - Non-Agency
10.2
Corporate Bonds & Notes
30.7
Foreign Government Obligations
0.1
Money Market Funds
4.3
Residential Mortgage-Backed Securities - Agency
0.6
Residential Mortgage-Backed Securities - Non-Agency
28.6
U.S. Treasury Obligations
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.
Quality breakdown (%) (at March 31, 2024)
AA rating
47.9
A rating
16.4
BBB rating
18.1
BB rating
3.5
B rating
3.0
CCC rating
0.1
CC rating
0.0
(a)
Not rated
11.0
Total
100.0
(a)
Rounds to zero.
Percentages indicated are based upon total fixed income investments.
Bond ratings apply to the underlying holdings of the Fund and not the Fund itself and are divided into categories ranging from highest to lowest credit quality, determined by using the middle rating of Moody’s, S&P and Fitch, after dropping the highest and lowest available ratings. When ratings are available from only two rating agencies, the lower rating is used. When a rating is available from only one rating agency, that rating is used. If a security is not rated but has a rating by Kroll and/or DBRS, the same methodology is applied to those bonds that would otherwise be not rated. When a bond is not rated by any rating agency, it is designated as “Not rated.” Credit quality ratings assigned by a rating agency are subjective opinions, not statements of fact, and are subject to change, including daily. The ratings assigned by credit rating agencies are but one of the considerations that the Investment Manager and/or Fund’s subadviser incorporates into its credit analysis process, along with such other issuer-specific factors as cash flows, capital structure and leverage ratios, ability to de-leverage (repay) through free cash flow, quality of management, market positioning and access to capital, as well as such security-specific factors as the terms of the security (e.g., interest rate and time to maturity) and the amount and type of any collateral.
4
Columbia Short Term Bond Fund  | Annual Report 2024

Manager Discussion of Fund Performance
(Unaudited)
For the 12-month period that ended March 31, 2024, Class A shares of Columbia Short Term Bond Fund returned 5.93% excluding sales charges. The Fund’s benchmark, the Bloomberg 1-3 Year Government/Credit Index, returned 3.49% for the same time period.
Market overview
Investor sentiment during the 12-month period ended March 31, 2024 was largely driven by the U.S. Federal Reserve (Fed) and its ongoing fight against historically elevated inflation, which it sought to tame by dampening economic growth and tightening the labor market. The Fed increased its targeted federal funds rate from a range of 4.75%-5.00% at the end of March 2023 to 5.25%-5.50% in July 2023 and then kept it at this level for five consecutive meetings, most recently in March 2024. While the federal funds rate had likely reached its peak for this tightening cycle, questions remained at the end of the annual period about the precise timing and extent of potential 2024 rate cuts, even as the Fed penciled in three 25 basis point cuts by the end of 2024, which would be the first reductions since the early days of the COVID pandemic in March 2020. (A basis point is 1/100th of a percentage point.)
Hiring and inflation slowed throughout most of 2023 but then showed surprising strength in the first quarter of 2024, which delayed consensus expectations for when the Fed may begin to cut interest rates. Along with that, the Personal Consumption Expenditures Price Index (PCE) cooled throughout 2023, giving hope for the Fed’s 2% inflation target. However, stronger than consensus expected prices, as measured by the Consumer Price Index and Producer Price Index, during the first quarter of 2024 showed inflation should still be a worry for the Fed. The Fed has indicated it would hold interest rates steady until it has seen convincing data on the state of inflation and the labor market.
Amid this backdrop, interest rates rose across the U.S. Treasury yield curve, or spectrum of maturities; the yield curve steepened as yields on longer-term maturities rose more than those on shorter-term maturities; and credit spreads tightened. Overall, spread, or non-government bond, sectors outperformed U.S. Treasuries, and shorter duration bonds outperformed longer duration bonds.
The Fund’s notable contributors during the period

The Fund benefited most on a relative basis from having exposure to residential mortgage-backed securities, asset-backed securities, commercial mortgage-backed securities and high-yield corporate bonds, which are all out-of-benchmark sectors and which all outperformed the Bloomberg 1-3 Year Government/Credit Index during the annual period.

Floating rate notes within the asset-backed securities sector particularly added value, as their coupons reset higher as short-term interest rates rose.

Spreads, or yield differentials to duration-equivalent U.S. Treasuries, in the high-yield corporate bond sector materially tightened, which positively impacted their prices.

Security selection within the investment-grade corporate bond sector was additive to the Fund’s relative performance. The Fund’s effective selection, especially within the industrials sub-sector, more than offset the detracting effect of being underweight the strongly performing sector.

Yield curve positioning boosted the Fund’s relative results during the annual period.
The Fund’s notable detractors during the period

The Fund was underweight the investment-grade corporate bond sector, which detracted modestly from its relative performance, as the sector outperformed the Bloomberg 1-3 Year Government/Credit Index during the annual period. Investment-grade corporate bonds represented the Fund’s largest sector underweight, excluding U.S. Treasuries.

The Fund had a slightly longer duration than that of the Bloomberg 1-3 Year Government/Credit Index, which hurt relative performance, as interest rates rose during the annual period. 
Market risk may affect a single issuer, sector of the economy, industry or the market as a whole. Mortgage- and asset-backed securities are affected by interest rates, financial health of issuers/originators, creditworthiness of entities providing credit enhancements and the value of underlying assets. Fixed-income securities present issuer default risk. A rise in interest rates may result in a price decline of fixed-income instruments held by the Fund,
Columbia Short Term Bond Fund  | Annual Report 2024
5

Manager Discussion of Fund Performance (continued)
(Unaudited)
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. Prepayment and extension risk exists because the timing of payments on a loan, bond or other investment may accelerate when interest rates fall or decelerate when interest rates rise which may reduce investment opportunities and potential returns. 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 who have contributed to this report. 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 Short Term Bond Fund  | Annual Report 2024

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.
October 1, 2023 — March 31, 2024
 
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
1,046.30
1,021.27
3.54
3.50
0.70
Advisor Class
1,000.00
1,000.00
1,047.60
1,022.50
2.28
2.25
0.45
Class C
1,000.00
1,000.00
1,043.50
1,018.55
6.32
6.24
1.25
Institutional Class
1,000.00
1,000.00
1,047.60
1,022.55
2.23
2.20
0.44
Institutional 2 Class
1,000.00
1,000.00
1,048.10
1,022.90
1.87
1.85
0.37
Institutional 3 Class
1,000.00
1,000.00
1,048.30
1,023.14
1.62
1.60
0.32
Class R
1,000.00
1,000.00
1,044.90
1,020.03
4.80
4.75
0.95
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 Short Term Bond Fund  | Annual Report 2024
7

Portfolio of Investments
March 31, 2024
(Percentages represent value of investments compared to net assets)
Investments in securities
Asset-Backed Securities - Non-Agency 25.2%
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
ACHV ABS Trust(a)
Series 2024-1PL Class A
04/25/2031
5.900%
 
1,050,000
1,049,979
Subordinated Series 2024-1PL Class B
04/25/2031
6.340%
 
1,125,000
1,124,742
ACM Auto Trust(a)
Subordinated Series 2023-1 Class C
01/22/2030
8.590%
 
4,062,000
4,100,680
Affirm Asset Securitization Trust(a)
Series 2023-B Class 1A
09/15/2028
6.820%
 
7,700,000
7,814,093
Series 2023-B Class A
09/15/2028
6.820%
 
1,525,000
1,547,596
Series 2023-X1 Class A
11/15/2028
7.110%
 
1,162,023
1,167,550
Series 2024-A Class A
02/15/2029
5.610%
 
2,600,000
2,596,533
Subordinated Series 2022-A Class C
05/17/2027
4.890%
 
7,780,000
7,583,210
Subordinated Series 2023-B Class 1C
09/15/2028
7.810%
 
1,200,000
1,221,961
American Credit Acceptance Receivables Trust(a)
Subordinated Series 2021-2 Class E
07/13/2027
2.540%
 
1,550,000
1,495,986
Subordinated Series 2022-2 Class D
06/13/2028
4.850%
 
4,300,000
4,228,798
Subordinated Series 2023-3 Class C
10/12/2029
6.440%
 
2,725,000
2,723,211
ARES XLVII CLO Ltd.(a),(b)
Series 2018-47A Class B
3-month Term SOFR + 1.712%
Floor 1.450%
04/15/2030
7.026%
 
4,000,000
4,000,088
Avant Loans Funding Trust(a)
Subordinated Series 2021-REV1 Class C
07/15/2030
2.300%
 
950,000
922,950
Barings CLO Ltd.(a),(b)
Series 2018-4A Class B
3-month Term SOFR + 1.962%
Floor 1.700%
10/15/2030
7.276%
 
10,800,000
10,804,568
Bayview Opportunity Master Fund VII LLC(a),(b),(c)
Subordinated Series 2024-CAR1 Class B
30-day Average SOFR + 1.500%
12/26/2031
5.000%
 
1,750,000
1,750,000
Asset-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Subordinated Series 2024-CAR1 Class C
30-day Average SOFR + 2.000%
12/26/2031
4.000%
 
900,000
900,000
Carlyle Global Market Strategies CLO Ltd.(a),(b)
Series 2013-4A Class BRR
3-month Term SOFR + 1.682%
Floor 1.420%
01/15/2031
6.996%
 
5,000,000
4,992,870
Carvana Auto Receivables Trust(a)
Series 2023-P1 Class A4
01/10/2029
5.940%
 
5,000,000
5,080,521
Cascade Funding Mortgage Trust(a)
CMO Series 2021-GRN1 Class A
03/20/2041
1.100%
 
1,999,412
1,904,315
CNH Equipment Trust
Series 2023-A Class A3
08/15/2028
4.810%
 
4,475,000
4,447,967
Drive Auto Receivables Trust
Subordinated Series 2021-2 Class D
03/15/2029
1.390%
 
2,000,000
1,912,674
Dryden CLO Ltd.(a),(b)
Series 2018-57A Class A
3-month Term SOFR + 1.272%
Floor 1.010%
05/15/2031
6.579%
 
3,614,775
3,618,733
Dryden Senior Loan Fund(a),(b)
Series 2016-42A Class BR
3-month Term SOFR + 1.812%
Floor 1.550%
07/15/2030
7.126%
 
3,025,000
3,025,783
DT Auto Owner Trust(a)
Subordinated Series 2020-3A Class D
06/15/2026
1.840%
 
4,015,000
3,906,508
Enterprise Fleet Financing LLC(a)
Series 2021-3 Class A3
08/20/2027
1.220%
 
8,000,000
7,644,525
Exeter Automobile Receivables Trust
Subordinated Series 2023-3A Class B
09/15/2027
6.110%
 
6,390,000
6,400,527
Foundation Finance Trust(a)
Series 2019-1A Class A
11/15/2034
3.860%
 
103,539
102,992
FREED ABS Trust(a)
Subordinated Series 2021-2 Class C
06/19/2028
1.940%
 
2,561,056
2,552,708
GLS Auto Receivables Issuer Trust(a)
Subordinated Series 2020-4A Class D
10/15/2026
1.640%
 
1,285,304
1,262,639
The accompanying Notes to Financial Statements are an integral part of this statement.
8
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Asset-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
GoldentTree Loan Management US CLO 1 Ltd.(a),(b)
Series 2021-10A Class A
3-month Term SOFR + 1.362%
Floor 1.100%
07/20/2034
6.679%
 
4,150,000
4,151,457
Hertz Vehicle Financing LLC(a)
Series 2021-1A Class C
12/26/2025
2.050%
 
3,000,000
2,929,019
Lendbuzz Securitization Trust(a)
Series 2022-1A Class A
05/17/2027
4.220%
 
2,216,188
2,177,357
LL ABS Trust(a)
Series 2021-1A Class A
05/15/2029
1.070%
 
48,464
48,353
Madison Park Funding XLVIII Ltd.(a),(b)
Series 2021-48A Class A
3-month Term SOFR + 1.412%
Floor 1.150%
04/19/2033
6.721%
 
1,250,000
1,250,691
MMAF Equipment Finance LLC(a)
Series 2020-A Class A3
04/09/2027
0.970%
 
1,426,519
1,363,348
MVW LLC(a)
Series 2019-2A Class A
10/20/2038
2.220%
 
1,048,893
996,636
OHA Credit Partners VII Ltd.(a),(b)
Series 2012-7A Class AR3
3-month Term SOFR + 1.332%
Floor 1.070%
02/20/2034
6.651%
 
5,000,000
5,005,630
OneMain Financial Issuance Trust(a)
Series 2022-2A Class A
10/14/2034
4.890%
 
11,000,000
10,924,451
Oportun Issuance Trust(a)
Series 2022-3 Class A
01/08/2030
7.451%
 
1,199,411
1,199,636
Pagaya AI Debt Selection Trust(a)
Series 2021-2 Class NOTE
01/25/2029
3.000%
 
1,237,941
1,210,593
Series 2021-HG1 Class A
01/16/2029
1.220%
 
1,692,307
1,650,005
Subordinated Series 2021-HG1 Class B
01/16/2029
1.820%
 
344,445
337,306
Pagaya AI Debt Trust(a)
Series 2022-1 Class A
10/15/2029
2.030%
 
710,959
703,896
Series 2022-5 Class A
06/17/2030
8.096%
 
4,752,636
4,803,638
Series 2024-1 Class A
07/15/2031
6.660%
 
3,300,000
3,311,903
Asset-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Series 2024-2 Class A
08/15/2031
6.319%
 
10,228,472
10,243,665
Series 2024-3 Class A
10/15/2031
6.258%
 
6,450,000
6,456,900
Pagaya AI Debt Trust(a),(d)
Subordinated Series 2023-7 Class AB
07/15/2031
7.342%
 
1,948,030
1,958,309
Prosper Marketplace Issuance Trust(a),(e),(f)
Series 2024-1A Class A
08/15/2029
6.120%
 
1,450,000
1,449,989
Race Point CLO Ltd.(a),(b)
Series 2013-8A Class AR2
3-month Term SOFR + 1.302%
Floor 1.040%
02/20/2030
6.621%
 
1,923,992
1,923,292
Race Point IX CLO Ltd.(a),(b)
Series 2015-9A Class A2R
3-month Term SOFR + 0.712%
Floor 1.450%
10/15/2030
6.026%
 
4,975,000
4,967,100
Reach ABS Trust(a)
Series 2024-1A Class A
02/18/2031
6.300%
 
2,308,392
2,313,165
Research-Driven Pagaya Motor Asset Trust IV(a)
Series 2021-2A Class A
03/25/2030
2.650%
 
1,323,537
1,269,852
Research-Driven Pagaya Motor Trust(a)
Series 2024-1A Class A
06/25/2032
7.090%
 
775,000
776,870
RR 3 Ltd.(a),(b)
Series 2014-14A Class A2R2
3-month Term SOFR + 1.662%
Floor 1.400%
01/15/2030
6.976%
 
10,000,000
9,971,240
Santander Revolving Auto Loan Trust(a)
Series 2019-A Class A
01/26/2032
2.510%
 
10,000,000
9,756,594
SCF Equipment Leasing LLC(a)
Subordinated Series 2020-1A Class B
03/20/2028
2.020%
 
1,037,622
1,033,822
Sierra Timeshare Receivables Funding LLC(a)
Series 2021-1A Class A
11/20/2037
0.990%
 
529,890
501,039
Upstart Pass-Through Trust(a)
Series 2020-ST4 Class A
11/20/2026
3.250%
 
667,656
662,229
Series 2020-ST6 Class A
01/20/2027
3.000%
 
601,935
595,340
Series 2021-ST10 Class A
01/20/2030
2.250%
 
1,760,818
1,723,698
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
9

Portfolio of Investments (continued)
March 31, 2024
Asset-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Series 2021-ST3 Class A
05/20/2027
2.000%
 
550,029
536,187
Upstart Securitization Trust(a)
Series 2020-2 Class A
11/20/2030
2.309%
 
137,871
137,555
Subordinated Series 2021-3 Class B
07/20/2031
1.660%
 
338,066
335,810
Westlake Automobile Receivables Trust(a)
Subordinated Series 2021-2A Class D
12/15/2026
1.230%
 
11,005,000
10,551,889
Subordinated Series 2021-3A Class D
01/15/2027
2.120%
 
4,000,000
3,825,854
Total Asset-Backed Securities — Non-Agency
(Cost $215,291,635)
214,939,025
Commercial Mortgage-Backed Securities - Non-Agency 10.5%
 
 
 
 
 
Ashford Hospitality Trust(a),(b)
Series 2018-KEYS Class B
1-month Term SOFR + 1.497%
Floor 1.450%
05/15/2035
6.822%
 
9,100,000
8,937,316
BAMLL Commercial Mortgage Securities Trust(a),(b)
Series 2018-DSNY Class C
1-month Term SOFR + 1.397%
Floor 1.600%
09/15/2034
6.723%
 
6,500,000
6,467,501
BBCMS Trust(a),(b)
Subordinated Series 2018-BXH Class C
1-month Term SOFR + 1.614%
Floor 1.500%
10/15/2037
6.940%
 
1,767,989
1,736,765
BHMS Mortgage Trust(a),(b)
Series 2018-ATLS Class A
1-month Term SOFR + 1.547%
Floor 1.250%
07/15/2035
6.623%
 
8,500,000
8,458,178
BX Mortgage Trust(a),(b)
Series 2021-PAC Class D
1-month Term SOFR + 1.412%
Floor 1.298%
10/15/2036
6.738%
 
6,350,000
6,197,212
BX Trust(a),(b)
Subordinated Series 2019-ATL Class C
1-month Term SOFR + 1.700%
Floor 1.587%
10/15/2036
7.027%
 
2,180,000
2,159,562
Subordinated Series 2019-ATL Class D
1-month Term SOFR + 2.001%
Floor 1.887%
10/15/2036
7.327%
 
1,931,000
1,892,036
Commercial Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
DBJPM Mortgage Trust
Series 2016-C3 Class A5
08/10/2049
2.890%
 
3,800,000
3,568,883
Extended Stay America Trust(a),(b)
Series 2021-ESH Class B
1-month Term SOFR + 1.494%
Floor 1.380%
07/15/2038
6.820%
 
6,399,790
6,400,997
GS Mortgage Securities Corp. II(a),(d)
Series 2023-SHIP Class A
09/10/2038
4.322%
 
1,850,000
1,794,261
Morgan Stanley Capital I Trust(a),(d)
Series 2019-MEAD Class D
11/10/2036
3.283%
 
3,675,000
3,244,409
One New York Plaza Trust(a),(b)
Subordinated Series 2020-1NYP Class C
1-month Term SOFR + 2.314%
Floor 2.200%
01/15/2036
7.640%
 
3,000,000
2,761,676
Subordinated Series 2020-1NYP Class D
1-month Term SOFR + 2.864%
Floor 2.750%
01/15/2036
8.190%
 
1,125,000
927,805
Progress Residential Trust(a)
Series 2020-SFR1 Class C
04/17/2037
2.183%
 
1,000,000
961,755
Series 2020-SFR1 Class D
04/17/2037
2.383%
 
2,025,000
1,947,504
Series 2020-SFR2 Class A
06/17/2037
2.078%
 
1,195,969
1,144,946
Subordinated Series 2020-SFR2 Class C
06/17/2037
3.077%
 
300,000
289,373
Subordinated Series 2020-SFR2 Class D
06/17/2037
3.874%
 
350,000
339,534
SPGN TFLM Mortgage Trust(a),(b)
Series 2022 Class A
1-month Term SOFR + 1.550%
Floor 1.550%
02/15/2039
6.875%
 
14,125,000
13,883,793
Wells Fargo Commercial Mortgage Trust(a),(b)
Series 2017-SMP Class A
1-month Term SOFR + 1.047%
Floor 0.875%
12/15/2034
6.372%
 
16,055,000
15,179,911
The accompanying Notes to Financial Statements are an integral part of this statement.
10
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Commercial Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Series 2021-FCMT Class D
1-month Term SOFR + 3.614%
Floor 3.500%
05/15/2031
8.940%
 
1,575,000
1,455,827
Total Commercial Mortgage-Backed Securities - Non-Agency
(Cost $92,255,457)
89,749,244
Corporate Bonds & Notes 31.7%
 
 
 
 
 
Aerospace & Defense 1.6%
BAE Systems Finance, Inc.(a)
07/01/2027
7.500%
 
3,000,000
3,202,462
Boeing Co. (The)
02/01/2027
2.700%
 
3,500,000
3,224,184
L3Harris Technologies, Inc.
06/01/2029
5.050%
 
3,000,000
2,990,135
TransDigm, Inc.(a)
08/15/2028
6.750%
 
351,000
356,145
03/01/2029
6.375%
 
442,000
443,351
United Technologies Corp.
11/16/2028
4.125%
 
3,300,000
3,194,017
Total
13,410,294
Airlines 0.2%
Air Canada(a)
08/15/2026
3.875%
 
313,000
299,080
American Airlines, Inc./AAdvantage Loyalty IP Ltd.(a)
04/20/2026
5.500%
 
458,250
455,172
Hawaiian Brand Intellectual Property Ltd./Miles Loyalty Ltd.(a)
01/20/2026
5.750%
 
444,673
418,343
United Airlines, Inc.(a)
04/15/2026
4.375%
 
618,000
597,640
Total
1,770,235
Automotive 0.3%
American Axle & Manufacturing, Inc.
03/15/2026
6.250%
 
68,000
67,376
Clarios Global LP(a)
05/15/2025
6.750%
 
741,000
742,082
Ford Motor Credit Co. LLC
11/13/2025
3.375%
 
309,000
297,359
05/28/2027
4.950%
 
140,000
136,625
IHO Verwaltungs GmbH(a),(g)
09/15/2026
4.750%
 
522,603
508,111
KAR Auction Services, Inc.(a)
06/01/2025
5.125%
 
581,000
571,617
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
ZF North America Capital, Inc.(a)
04/29/2025
4.750%
 
191,000
188,684
04/14/2028
6.875%
 
80,000
83,014
Total
2,594,868
Banking 8.4%
Bank of America Corp.(h)
03/11/2027
1.658%
 
9,500,000
8,848,716
Bank of Montreal
09/25/2028
5.717%
 
2,100,000
2,158,206
Bank of New York Mellon Corp. (The)(h)
03/14/2030
4.975%
 
2,435,000
2,436,135
Bank of Nova Scotia (The)
06/12/2028
5.250%
 
1,600,000
1,614,295
Citigroup, Inc.(h)
02/13/2030
5.174%
 
6,500,000
6,469,759
Goldman Sachs Group, Inc. (The)(h)
04/23/2029
3.814%
 
6,500,000
6,160,391
HSBC Holdings PLC(h)
03/04/2030
5.546%
 
5,200,000
5,232,774
JPMorgan Chase & Co.(h)
04/23/2029
4.005%
 
8,500,000
8,143,335
Morgan Stanley(h)
01/16/2030
5.173%
 
7,000,000
7,008,762
PNC Financial Services Group, Inc. (The)(h)
12/02/2028
5.354%
 
3,000,000
3,012,844
Royal Bank of Canada
02/01/2029
4.950%
 
2,500,000
2,501,722
Toronto-Dominion Bank (The)(c)
04/05/2029
4.994%
 
3,125,000
3,124,218
Truist Financial Corp.(h)
06/06/2028
4.123%
 
2,650,000
2,560,226
US Bancorp(h)
06/12/2029
5.775%
 
3,000,000
3,052,740
Wells Fargo & Co.(h)
10/23/2029
6.303%
 
6,500,000
6,771,610
Westpac Banking Corp.
11/17/2028
5.535%
 
2,075,000
2,133,121
Total
71,228,854
Brokerage/Asset Managers/Exchanges 0.0%
AG TTMT Escrow Issuer LLC(a)
09/30/2027
8.625%
 
295,000
305,315
NFP Corp.(a)
08/15/2028
4.875%
 
85,000
85,161
Total
390,476
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
11

Portfolio of Investments (continued)
March 31, 2024
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Building Materials 0.2%
Beacon Roofing Supply, Inc.(a)
11/15/2026
4.500%
 
564,000
548,228
James Hardie International Finance DAC(a)
01/15/2028
5.000%
 
214,000
208,619
SRS Distribution, Inc.(a)
07/01/2028
4.625%
 
257,000
259,114
Standard Industries, Inc.(a)
02/15/2027
5.000%
 
471,000
456,942
01/15/2028
4.750%
 
114,000
108,779
Summit Materials LLC/Finance Corp.(a)
01/15/2029
5.250%
 
84,000
81,749
Total
1,663,431
Cable and Satellite 0.7%
CCO Holdings LLC/Capital Corp.(a)
05/01/2026
5.500%
 
77,000
75,881
05/01/2027
5.125%
 
794,000
756,313
02/01/2028
5.000%
 
135,000
125,711
Charter Communications Operating LLC/Capital
01/15/2029
2.250%
 
3,200,000
2,722,922
CSC Holdings LLC(a)
04/15/2027
5.500%
 
416,000
372,170
DISH Network Corp.(a)
11/15/2027
11.750%
 
211,000
215,534
Sirius XM Radio, Inc.(a)
09/01/2026
3.125%
 
548,000
513,791
07/15/2028
4.000%
 
169,000
154,635
Videotron Ltd.(a)
04/15/2027
5.125%
 
374,000
366,180
Ziggo Bond Finance BV(a)
01/15/2027
6.000%
 
655,000
645,666
Total
5,948,803
Chemicals 0.4%
Axalta Coating Systems LLC/Dutch Holding B BV(a)
06/15/2027
4.750%
 
140,000
135,124
Element Solutions, Inc.(a)
09/01/2028
3.875%
 
150,000
137,495
INEOS Finance PLC(a)
04/15/2029
7.500%
 
170,000
170,524
Ingevity Corp.(a)
11/01/2028
3.875%
 
155,000
140,031
LYB International Finance III LLC
10/01/2025
1.250%
 
2,271,000
2,133,261
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Olympus Water US Holding Corp.(a)
10/01/2028
4.250%
 
200,000
181,184
11/15/2028
9.750%
 
185,000
197,237
WR Grace Holdings LLC(a)
06/15/2027
4.875%
 
431,000
409,959
Total
3,504,815
Construction Machinery 0.1%
Herc Holdings, Inc.(a)
07/15/2027
5.500%
 
640,000
628,945
Ritchie Bros Holdings, Inc.(a)
03/15/2028
6.750%
 
88,000
89,811
Total
718,756
Consumer Cyclical Services 0.1%
Arches Buyer, Inc.(a)
06/01/2028
4.250%
 
225,000
198,003
ASGN, Inc.(a)
05/15/2028
4.625%
 
120,000
113,513
Match Group, Inc.(a)
12/15/2027
5.000%
 
104,000
99,855
06/01/2028
4.625%
 
172,000
162,457
Prime Security Services Borrower LLC/Finance, Inc.(a)
04/15/2024
5.250%
 
34,000
33,978
Uber Technologies, Inc.(a)
01/15/2028
6.250%
 
275,000
276,333
Total
884,139
Consumer Products 0.2%
Acushnet Co.(a)
10/15/2028
7.375%
 
134,000
138,751
CD&R Smokey Buyer, Inc.(a)
07/15/2025
6.750%
 
859,000
850,999
Newell Brands, Inc.
06/01/2025
4.875%
 
145,000
142,933
Newell, Inc.
04/01/2026
5.200%
 
330,000
324,335
Total
1,457,018
Diversified Manufacturing 0.7%
Carrier Global Corp.
02/15/2027
2.493%
 
2,300,000
2,143,955
Esab Corp.(a),(c)
04/15/2029
6.250%
 
69,000
69,369
Gates Global LLC/Co.(a)
01/15/2026
6.250%
 
814,000
811,926
Madison IAQ LLC(a)
06/30/2028
4.125%
 
57,000
52,730
The accompanying Notes to Financial Statements are an integral part of this statement.
12
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Siemens Financieringsmaatschappij NV(a)
03/11/2026
1.200%
 
1,000,000
931,981
Vertical US Newco, Inc.(a)
07/15/2027
5.250%
 
328,000
316,933
WESCO Distribution, Inc.(a)
06/15/2025
7.125%
 
570,000
570,733
06/15/2028
7.250%
 
402,000
410,451
03/15/2029
6.375%
 
218,000
220,291
Total
5,528,369
Electric 3.4%
American Electric Power Co., Inc.
01/15/2029
5.200%
 
2,165,000
2,169,956
CenterPoint Energy, Inc.
03/01/2030
2.950%
 
2,500,000
2,232,987
Clearway Energy Operating LLC(a)
03/15/2028
4.750%
 
841,000
800,143
Dominion Energy, Inc.
10/01/2025
3.900%
 
1,000,000
978,108
DTE Energy Co.
03/01/2029
5.100%
 
2,500,000
2,491,109
Duke Energy Corp.
01/05/2029
4.850%
 
1,500,000
1,486,954
Edison International
11/15/2028
5.250%
 
2,000,000
1,996,035
Emera US Finance LP
06/15/2026
3.550%
 
1,000,000
959,637
Eversource Energy
03/01/2028
5.450%
 
600,000
607,501
Exelon Corp.
03/15/2029
5.150%
 
2,400,000
2,406,833
FirstEnergy Corp.(h)
07/15/2027
4.150%
 
3,000,000
2,879,265
NextEra Energy Capital Holdings, Inc.
07/15/2027
4.625%
 
2,000,000
1,974,205
NextEra Energy Operating Partners LP(a)
07/15/2024
4.250%
 
618,000
613,073
10/15/2026
3.875%
 
193,000
180,148
01/15/2029
7.250%
 
269,000
275,539
NRG Energy, Inc.
01/15/2027
6.625%
 
130,000
130,179
01/15/2028
5.750%
 
290,000
288,411
PPL Capital Funding, Inc.
05/15/2026
3.100%
 
1,500,000
1,434,270
Southern Co. (The)
03/15/2028
1.750%
 
3,000,000
2,651,674
TerraForm Power Operating LLC(a)
01/31/2028
5.000%
 
308,000
293,607
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Vistra Operations Co. LLC(a)
09/01/2026
5.500%
 
274,000
269,847
02/15/2027
5.625%
 
423,000
416,484
WEC Energy Group, Inc.
01/15/2028
4.750%
 
1,600,000
1,591,083
Total
29,127,048
Environmental 0.1%
GFL Environmental, Inc.(a)
06/01/2025
4.250%
 
280,000
275,581
Waste Pro USA, Inc.(a)
02/15/2026
5.500%
 
298,000
293,609
Total
569,190
Finance Companies 0.3%
GGAM Finance Ltd.(a),(c)
04/15/2029
6.875%
 
92,000
92,670
Navient Corp.
10/25/2024
5.875%
 
149,000
148,693
06/25/2025
6.750%
 
159,000
160,074
OneMain Finance Corp.
01/15/2027
3.500%
 
149,000
138,336
Provident Funding Associates LP/Finance Corp.(a)
06/15/2025
6.375%
 
215,000
206,148
Rocket Mortgage LLC/Co-Issuer, Inc.(a)
10/15/2026
2.875%
 
861,000
795,536
Springleaf Finance Corp.
03/15/2025
6.875%
 
50,000
50,527
03/15/2026
7.125%
 
280,000
285,005
United Wholesale Mortgage LLC(a)
11/15/2025
5.500%
 
116,000
114,961
06/15/2027
5.750%
 
143,000
139,154
Total
2,131,104
Food and Beverage 0.9%
Bacardi Ltd./Bacardi-Martini BV(a)
01/15/2029
5.250%
 
3,000,000
2,985,787
Darling Ingredients, Inc.(a)
04/15/2027
5.250%
 
145,000
142,320
Diageo Capital PLC
10/24/2027
5.300%
 
2,000,000
2,027,860
Kraft Heinz Foods Co.
05/15/2027
3.875%
 
1,000,000
968,921
Mondelez International, Inc.
03/17/2027
2.625%
 
1,000,000
936,797
Post Holdings, Inc.(a)
01/15/2028
5.625%
 
573,000
562,596
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
13

Portfolio of Investments (continued)
March 31, 2024
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
US Foods, Inc.(a)
09/15/2028
6.875%
 
403,000
412,879
Total
8,037,160
Gaming 0.2%
Churchill Downs, Inc.(a)
04/01/2027
5.500%
 
128,000
125,631
01/15/2028
4.750%
 
110,000
104,708
Colt Merger Sub, Inc.(a)
07/01/2027
8.125%
 
97,000
99,339
International Game Technology PLC(a)
04/15/2026
4.125%
 
201,000
194,831
01/15/2027
6.250%
 
150,000
151,054
Scientific Games International, Inc.(a)
05/15/2028
7.000%
 
119,000
120,001
VICI Properties LP/Note Co., Inc.(a)
02/15/2025
3.500%
 
377,000
368,897
06/15/2025
4.625%
 
121,000
119,289
12/01/2026
4.250%
 
273,000
262,653
Total
1,546,403
Health Care 1.3%
Acadia Healthcare Co., Inc.(a)
07/01/2028
5.500%
 
240,000
234,115
Avantor Funding, Inc.(a)
07/15/2028
4.625%
 
214,000
202,745
Bausch & Lomb Escrow Corp.(a)
10/01/2028
8.375%
 
176,000
182,014
CHS/Community Health Systems, Inc.(a)
03/15/2026
8.000%
 
95,000
94,825
Cigna Corp.
03/01/2027
3.400%
 
1,500,000
1,437,316
CVS Health Corp.
01/30/2029
5.000%
 
1,500,000
1,502,089
Encompass Health Corp.
02/01/2028
4.500%
 
83,000
79,012
GE HealthCare Technologies, Inc.
11/15/2027
5.650%
 
1,050,000
1,069,157
HCA, Inc.
06/01/2028
5.200%
 
3,000,000
3,009,722
HealthSouth Corp.
09/15/2025
5.750%
 
91,000
90,614
IQVIA, Inc.(a)
10/15/2026
5.000%
 
435,000
425,868
Medline Borrower LP/Co-Issuer, Inc.(a)
04/01/2029
6.250%
 
91,000
91,410
Mozart Debt Merger Sub, Inc.(a)
04/01/2029
3.875%
 
318,000
289,458
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Select Medical Corp.(a)
08/15/2026
6.250%
 
1,051,000
1,054,103
Tenet Healthcare Corp.
02/01/2027
6.250%
 
719,000
718,607
11/01/2027
5.125%
 
212,000
207,294
Total
10,688,349
Healthcare Insurance 0.7%
Anthem, Inc.
03/01/2028
4.101%
 
1,500,000
1,458,467
Centene Corp.
07/15/2028
2.450%
 
3,000,000
2,662,127
UnitedHealth Group, Inc.
04/15/2029
4.700%
 
2,075,000
2,069,914
Total
6,190,508
Home Construction 0.0%
TRI Pointe Group, Inc./Homes
06/15/2024
5.875%
 
154,000
153,831
Independent Energy 0.4%
Antero Resources Corp.(a)
02/01/2029
7.625%
 
149,000
153,149
Centennial Resource Production LLC(a)
04/01/2027
6.875%
 
402,000
402,000
Civitas Resources, Inc.(a)
07/01/2028
8.375%
 
140,000
147,271
CrownRock LP/Finance, Inc.(a)
10/15/2025
5.625%
 
568,000
566,334
Hilcorp Energy I LP/Finance Co.(a)
11/01/2028
6.250%
 
270,000
269,778
Permian Resources Operating LLC(a)
04/15/2027
8.000%
 
142,000
146,318
Woodside Finance Ltd.(a)
03/15/2028
3.700%
 
1,800,000
1,691,214
Total
3,376,064
Integrated Energy 0.3%
BP Capital Markets America, Inc.
04/10/2029
4.699%
 
2,475,000
2,469,435
Leisure 0.5%
Boyne USA, Inc.(a)
05/15/2029
4.750%
 
116,000
107,585
Carnival Corp.(a)
03/01/2026
7.625%
 
224,000
226,370
03/01/2027
5.750%
 
332,000
328,636
The accompanying Notes to Financial Statements are an integral part of this statement.
14
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Cedar Fair LP/Canada’s Wonderland Co./Magnum Management Corp./Millennium
Op(a)
05/01/2025
5.500%
 
428,000
426,794
Cedar Fair LP/Canada’s Wonderland Co./Magnum Management Corp./Millennium Op
10/01/2028
6.500%
 
128,000
128,177
Cinemark USA, Inc.(a)
05/01/2025
8.750%
 
219,000
219,607
03/15/2026
5.875%
 
228,000
225,241
07/15/2028
5.250%
 
110,000
104,152
Live Nation Entertainment, Inc.(a)
11/01/2024
4.875%
 
855,000
850,101
03/15/2026
5.625%
 
200,000
197,862
Royal Caribbean Cruises Ltd.(a)
07/01/2026
4.250%
 
303,000
292,568
08/31/2026
5.500%
 
275,000
272,344
Six Flags Entertainment Corp.(a)
04/15/2027
5.500%
 
517,000
505,171
Six Flags Theme Parks, Inc.(a)
07/01/2025
7.000%
 
69,000
69,193
Vail Resorts, Inc.(a)
05/15/2025
6.250%
 
211,000
211,048
Viking Cruises Ltd.(a)
02/15/2029
7.000%
 
292,000
293,232
Total
4,458,081
Life Insurance 1.4%
Corebridge Financial, Inc.
04/05/2027
3.650%
 
2,000,000
1,911,817
Five Corners Funding Trust II(a)
05/15/2030
2.850%
 
2,400,000
2,105,263
Metropolitan Life Global Funding I(a)
01/08/2029
4.850%
 
2,750,000
2,729,140
Peachtree Corners Funding Trust(a)
02/15/2025
3.976%
 
2,697,000
2,647,826
Principal Life Global Funding II(a)
01/25/2029
5.100%
 
2,815,000
2,806,493
Total
12,200,539
Lodging 0.0%
Hilton Domestic Operating Co., Inc.(a)
05/01/2025
5.375%
 
132,000
131,719
Media and Entertainment 0.4%
Clear Channel Worldwide Holdings, Inc.(a)
08/15/2027
5.125%
 
300,000
283,159
Outfront Media Capital LLC/Corp.(a)
08/15/2027
5.000%
 
114,000
109,758
01/15/2029
4.250%
 
170,000
154,046
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Univision Communications, Inc.(a)
06/01/2027
6.625%
 
162,000
158,571
Warnermedia Holdings, Inc.
03/15/2029
4.054%
 
3,000,000
2,809,765
Total
3,515,299
Metals and Mining 0.2%
Constellium NV(a)
02/15/2026
5.875%
 
783,000
777,385
Constellium SE(a)
06/15/2028
5.625%
 
84,000
81,757
Hudbay Minerals, Inc.(a)
04/01/2026
4.500%
 
791,000
764,348
Novelis Corp.(a)
11/15/2026
3.250%
 
432,000
402,756
Total
2,026,246
Midstream 2.1%
Antero Midstream Partners LP/Finance Corp.(a)
03/01/2027
5.750%
 
280,000
276,249
01/15/2028
5.750%
 
142,000
139,758
Delek Logistics Partners LP/Finance Corp.(a)
03/15/2029
8.625%
 
172,000
175,659
Enbridge, Inc.
11/15/2028
6.000%
 
2,000,000
2,080,078
Energy Transfer Operating LP
04/15/2029
5.250%
 
2,200,000
2,204,434
Enterprise Products Operating LLC
10/16/2028
4.150%
 
1,000,000
972,933
EQM Midstream Partners LP
08/01/2024
4.000%
 
70,000
69,532
12/01/2026
4.125%
 
178,000
171,453
EQM Midstream Partners LP(a)
07/01/2025
6.000%
 
332,000
332,204
06/01/2027
7.500%
 
140,000
143,531
04/01/2029
6.375%
 
60,000
60,422
MPLX LP
03/15/2028
4.000%
 
2,000,000
1,925,773
NuStar Logistics LP
10/01/2025
5.750%
 
680,000
677,153
06/01/2026
6.000%
 
256,000
255,213
Plains All American Pipeline LP/Finance Corp.
12/15/2026
4.500%
 
2,000,000
1,963,813
Sunoco LP/Finance Corp.(a)
09/15/2028
7.000%
 
185,000
189,055
Venture Global Calcasieu Pass LLC(a)
08/15/2029
3.875%
 
110,000
99,028
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
15

Portfolio of Investments (continued)
March 31, 2024
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Venture Global LNG, Inc.(a)
06/01/2028
8.125%
 
270,000
275,466
02/01/2029
9.500%
 
145,000
156,314
Western Midstream Operating LP
03/01/2028
4.500%
 
3,000,000
2,896,093
Williams Companies, Inc. (The)
03/15/2029
4.900%
 
2,725,000
2,707,498
Total
17,771,659
Natural Gas 0.3%
NiSource, Inc.
03/30/2028
5.250%
 
2,400,000
2,418,122
Oil Field Services 0.1%
Archrock Partners LP/Finance Corp.(a)
04/01/2027
6.875%
 
213,000
213,596
04/01/2028
6.250%
 
55,000
54,297
USA Compression Partners LP/Finance Corp.
09/01/2027
6.875%
 
280,000
280,371
Total
548,264
Other Industry 0.1%
Picasso Finance Sub, Inc.(a)
06/15/2025
6.125%
 
438,000
437,388
Williams Scotsman International, Inc.(a)
08/15/2028
4.625%
 
125,000
118,155
Total
555,543
Other REIT 0.2%
Ladder Capital Finance Holdings LLLP/Corp.(a)
10/01/2025
5.250%
 
75,000
73,716
02/01/2027
4.250%
 
769,000
718,948
Park Intermediate Holdings LLC/Domestic Property/Finance Co-Issuer(a)
06/01/2025
7.500%
 
599,000
600,540
RLJ Lodging Trust LP(a)
07/01/2026
3.750%
 
437,000
416,239
Total
1,809,443
Packaging 0.3%
Ardagh Metal Packaging Finance USA LLC/PLC(a)
06/15/2027
6.000%
 
335,000
326,020
09/01/2028
3.250%
 
85,000
73,433
Ardagh Packaging Finance PLC/Holdings USA, Inc.(a)
04/30/2025
5.250%
 
341,000
329,158
Berry Global, Inc.(a)
02/15/2026
4.500%
 
224,000
218,025
Canpack SA/Eastern PA Land Investment Holding LLC(a)
11/01/2025
3.125%
 
178,000
171,098
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Sealed Air Corp.(a)
02/01/2028
6.125%
 
272,000
272,785
Trivium Packaging Finance BV(a)
08/15/2026
5.500%
 
754,000
742,220
Total
2,132,739
Pharmaceuticals 1.5%
AbbVie, Inc.
03/15/2029
4.800%
 
3,000,000
3,006,410
Amgen, Inc.
03/02/2028
5.150%
 
3,000,000
3,020,774
Astrazeneca Finance LLC
02/26/2029
4.850%
 
1,590,000
1,595,017
Bausch Health Companies, Inc.(a)
11/01/2025
5.500%
 
151,000
142,484
Bristol-Myers Squibb Co.
02/22/2029
4.900%
 
2,000,000
2,010,594
Organon Finance 1 LLC(a)
04/30/2028
4.125%
 
145,000
135,079
Pfizer Investment Enterprises Pte Ltd.
05/19/2028
4.450%
 
3,000,000
2,957,042
Total
12,867,400
Property & Casualty 0.1%
Alliant Holdings Intermediate LLC/Co-Issuer(a)
10/15/2027
4.250%
 
145,000
136,567
04/15/2028
6.750%
 
434,000
436,723
AmWINS Group, Inc.(a)
02/15/2029
6.375%
 
291,000
292,315
Radian Group, Inc.
10/01/2024
4.500%
 
285,000
282,254
Total
1,147,859
Railroads 0.2%
CSX Corp.
03/01/2028
3.800%
 
1,750,000
1,692,897
Refining 0.0%
HF Sinclair Corp.(a)
04/15/2027
6.375%
 
241,000
242,417
Restaurants 0.1%
1011778 BC ULC/New Red Finance, Inc.(a)
01/15/2028
4.375%
 
164,000
155,029
IRB Holding Corp.(a)
06/15/2025
7.000%
 
1,060,000
1,061,352
Total
1,216,381
The accompanying Notes to Financial Statements are an integral part of this statement.
16
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Retailers 0.4%
Hanesbrands, Inc.(a)
05/15/2026
4.875%
 
250,000
243,641
LCM Investments Holdings II LLC(a)
05/01/2029
4.875%
 
82,000
75,355
Lowe’s Companies, Inc.
04/05/2029
3.650%
 
3,000,000
2,845,584
PetSmart, Inc./Finance Corp.(a)
02/15/2028
4.750%
 
250,000
233,454
Total
3,398,034
Supermarkets 0.1%
Albertsons Companies LLC/Safeway, Inc./New Albertsons LP/Albertsons LLC(a)
03/15/2026
7.500%
 
248,000
252,384
Albertsons Companies, Inc./Safeway, Inc./New Albertsons LP/Albertsons LLC(a)
03/15/2026
3.250%
 
305,000
290,586
Total
542,970
Technology 1.8%
Block, Inc.
06/01/2026
2.750%
 
301,000
283,320
Boxer Parent Co., Inc.(a)
10/02/2025
7.125%
 
162,000
162,065
Broadcom Corp./Cayman Finance Ltd.
01/15/2027
3.875%
 
3,200,000
3,100,455
Camelot Finance SA(a)
11/01/2026
4.500%
 
586,000
563,805
Central Parent, Inc./CDK Global, Inc.(a)
06/15/2029
7.250%
 
110,000
112,374
Entegris, Inc.(a)
04/15/2028
4.375%
 
105,000
98,865
Iron Mountain, Inc.(a)
09/15/2027
4.875%
 
391,000
377,586
03/15/2028
5.250%
 
240,000
232,251
07/15/2028
5.000%
 
84,000
80,291
Microchip Technology, Inc.
03/15/2029
5.050%
 
3,065,000
3,067,462
NCR Corp.(a)
10/01/2028
5.000%
 
447,000
416,940
NortonLifeLock, Inc.(a)
09/30/2027
6.750%
 
137,000
139,026
NXP BV/Funding LLC
12/01/2028
5.550%
 
3,000,000
3,047,819
Open Text Corp.(a)
02/15/2028
3.875%
 
139,000
128,709
Oracle Corp.
05/06/2028
4.500%
 
2,000,000
1,970,849
Corporate Bonds & Notes (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Picard Midco, Inc.(a)
03/31/2029
6.500%
 
237,000
225,053
Shift4 Payments LLC/Finance Sub, Inc.(a)
11/01/2026
4.625%
 
564,000
545,207
Tempo Acquisition LLC/Finance Corp.(a)
06/01/2025
5.750%
 
642,000
640,450
ZoomInfo Technologies LLC/Finance Corp.(a)
02/01/2029
3.875%
 
284,000
255,422
Total
15,447,949
Transportation Services 0.3%
ERAC USA Finance LLC(a)
02/15/2029
5.000%
 
2,500,000
2,505,334
Wireless 0.5%
Altice France SA(a)
02/01/2027
8.125%
 
425,000
331,679
American Tower Corp.
01/31/2028
1.500%
 
1,000,000
872,694
SBA Communications Corp.
02/15/2027
3.875%
 
230,000
219,095
T-Mobile US, Inc.
04/15/2029
3.375%
 
3,000,000
2,776,544
Total
4,200,012
Wirelines 0.6%
AT&T, Inc.
03/01/2029
4.350%
 
3,000,000
2,923,940
Frontier Communications Holdings LLC(a)
10/15/2027
5.875%
 
145,000
140,348
Iliad Holding SAS(a)
10/15/2026
6.500%
 
855,000
846,247
Verizon Communications, Inc.
03/22/2028
2.100%
 
1,700,000
1,531,106
Total
5,441,641
Total Corporate Bonds & Notes
(Cost $271,183,304)
269,659,698
Foreign Government Obligations(i) 0.1%
 
 
 
 
 
Canada 0.1%
NOVA Chemicals Corp.(a)
06/01/2027
5.250%
 
504,000
475,514
11/15/2028
8.500%
 
37,000
39,379
Total
514,893
Total Foreign Government Obligations
(Cost $556,472)
514,893
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
17

Portfolio of Investments (continued)
March 31, 2024
Residential Mortgage-Backed Securities - Agency 0.6%
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Federal Home Loan Mortgage Corp.
05/01/2024-
10/01/2024
4.500%
 
377
375
03/01/2025-
04/01/2026
4.000%
 
2,359
2,336
11/01/2025
3.500%
 
488
480
Federal Home Loan Mortgage Corp.(b)
1-year CMT + 2.222%
Cap 9.291%
03/01/2034
6.383%
 
84,682
83,989
12-month Term SOFR + 1.735%
Cap 10.860%
07/01/2036
5.985%
 
1,473
1,458
12-month Term SOFR + 1.703%
Cap 11.242%
08/01/2036
5.839%
 
15,296
15,690
Federal National Mortgage Association
04/01/2024-
06/01/2026
4.000%
 
1,633
1,611
12/01/2025-
09/01/2026
3.500%
 
10,735
10,528
Federal National Mortgage Association(d)
CMO Series 2003-W11 Class A1
06/25/2033
6.720%
 
4,956
4,985
Government National Mortgage Association(b)
1-year CMT + 1.500%
Floor 1.000%, Cap 11.000%
03/20/2030
3.625%
 
4,134
4,065
Government National Mortgage Association
08/15/2037
7.500%
 
10,585
10,558
Uniform Mortgage-Backed Security TBA(c)
04/16/2039
4.500%
 
5,250,000
5,168,557
Total Residential Mortgage-Backed Securities - Agency
(Cost $5,302,022)
5,304,632
Residential Mortgage-Backed Securities - Non-Agency 29.5%
 
 
 
 
 
510 Asset Backed Trust(a),(d)
CMO Series 2021-NPL2 Class A1
06/25/2061
2.116%
 
2,477,984
2,406,109
Angel Oak Mortgage Trust(a),(d)
CMO Series 2020-6 Class A3
05/25/2065
1.775%
 
323,925
285,990
CMO Series 2020-6 Class M1
05/25/2065
2.805%
 
1,225,000
992,907
CMO Series 2021-8 Class A1
11/25/2066
1.820%
 
6,725,951
5,796,448
Banc of America Funding Trust
CMO Series 2005-5 Class 2A1
09/25/2035
5.500%
 
76,592
73,177
Residential Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Banc of America Funding Trust(d)
CMO Series 2007-C Class 1A3
05/20/2036
4.806%
 
44,949
38,764
BRAVO Residential Funding Trust(a),(d)
CMO Series 2020-NQM1 Class A1
05/25/2060
1.449%
 
371,345
353,029
CMO Series 2021-NQM1 Class A1
02/25/2049
0.941%
 
2,780,709
2,427,538
CMO Series 2023-NQM8 Class A1
10/25/2063
6.394%
 
4,823,584
4,848,112
CMO Series 2024-NQM3 Class A1
03/25/2064
6.219%
 
10,000,000
10,034,071
CFMT LLC(a),(d)
CMO Series 2021-EBO1 Class A
11/25/2050
0.985%
 
1,012,771
958,118
Chase Mortgage Finance Trust
CMO Series 2005-S2 Class A1
10/25/2035
5.500%
 
59,085
55,007
CMO Series 2006-S4 Class A3
12/25/2036
6.000%
 
147,412
62,739
CHNGE Mortgage Trust(a),(d)
CMO Series 2022-1 Class A1
01/25/2067
3.007%
 
5,638,570
5,121,100
CMO Series 2022-NQM1 Class A1
06/25/2067
5.189%
 
1,950,108
1,908,580
CIM Trust(a),(d)
CMO Series 2021-NR1 Class A1
07/25/2055
2.569%
 
1,240,245
1,220,978
COLT Mortgage Loan Trust(a),(d)
CMO Series 2024-1 Class A1
02/25/2069
5.835%
 
2,720,913
2,713,552
Credit Suisse Mortgage Trust(a),(d)
CMO Series 2021-AFC1 Class A1
03/25/2056
0.830%
 
1,602,078
1,257,255
CMO Series 2021-RPL1 Class A1
09/27/2060
4.036%
 
3,737,525
3,609,228
CMO Series 2022-JR1 Class A1
10/25/2066
4.267%
 
9,349,082
9,182,898
Cross Mortgage Trust(a),(d)
CMO Series 2024-H2 Class A1
04/25/2069
6.093%
 
1,850,000
1,852,146
CSMC Trust(a)
CMO Series 2019-AFC1 Class A1
07/25/2049
3.573%
 
1,087,982
1,007,476
CSMC Trust(a),(d)
CMO Series 2021-RPL4 Class A1
12/27/2060
1.796%
 
2,864,431
2,760,913
The accompanying Notes to Financial Statements are an integral part of this statement.
18
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Residential Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
CMO Series 2022-NQM5 Class A1
05/25/2067
5.169%
 
3,609,220
3,604,426
Subordinated CMO Series 2020-RPL3 Class A1
03/25/2060
4.046%
 
2,113,560
2,112,251
Subordinated CMO Series 2020-RPL4 Class A1
01/25/2060
2.000%
 
5,238,901
4,558,014
Deephaven Residential Mortgage Trust(a),(d)
CMO Series 2022-1 Class A1
01/25/2067
2.205%
 
13,672,664
11,987,269
Eagle Re Ltd.(a),(b)
CMO Series 2021-2 Class M1B
30-day Average SOFR + 2.050%
Floor 2.050%
04/25/2034
7.370%
 
3,694,333
3,702,052
Freddie Mac STACR REMIC Trust(a),(b)
CMO Series 2021-DNA5 Class M2
30-day Average SOFR + 1.650%
01/25/2034
6.970%
 
963,505
968,355
CMO Series 2021-HQA4 Class M1
30-day Average SOFR + 0.950%
12/25/2041
6.270%
 
2,701,167
2,686,761
GCAT Trust(a),(d)
CMO Series 2021-CM2 Class A1
08/25/2066
2.352%
 
3,032,125
2,759,447
CMO Series 2022-NQM4 Class A1
08/25/2067
5.269%
 
3,456,959
3,471,469
GS Mortgage-Backed Securities Trust(a),(d)
CMO Series 2020-NQM1 Class A1
09/27/2060
1.382%
 
840,389
762,100
Homeward Opportunities Fund Trust(a),(h)
CMO Series 2022-1 Class A1
07/25/2067
5.082%
 
6,234,934
6,150,224
Imperial Fund Mortgage Trust(a),(d)
CMO Series 2021-NQM2 Class A3
09/25/2056
1.516%
 
2,310,577
1,875,442
JPMorgan Mortgage Trust
CMO Series 2005-S3 Class 2A2
01/25/2025
5.500%
 
7,072
6,624
JPMorgan Mortgage Trust(d)
CMO Series 2007-A2 Class 3A1
04/25/2037
4.581%
 
4,350
3,447
Legacy Mortgage Asset Trust(a),(d)
CMO Series 2021-GS1 Class A1
10/25/2066
4.892%
 
2,733,403
2,680,729
CMO Series 2021-GS2 Class A1
04/25/2061
1.750%
 
5,075,274
4,918,418
MFA Trust(a),(d)
CMO Series 2020-NQM1 Class A1
03/25/2065
1.479%
 
770,156
721,862
Residential Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
CMO Series 2023-NQM4 Class A1
12/25/2068
6.105%
 
4,239,950
4,239,298
Morgan Stanley Mortgage Loan Trust(d)
CMO Series 2004-10AR Class 2A2
11/25/2034
6.173%
 
25,879
24,151
New Residential Mortgage Loan Trust(a),(d)
CMO Series 2019-NQM4 Class A2
09/25/2059
2.644%
 
1,143,201
1,054,274
NRZ Excess Spread-Collateralized Notes(a)
Series 2020-PLS1 Class A
12/25/2025
3.844%
 
813,330
779,606
OBX Trust(a),(d)
CMO Series 2019-EXP2 Class 1A3
06/25/2059
4.000%
 
392,992
365,134
CMO Series 2023-NQM8 Class A1
09/25/2063
7.045%
 
2,669,768
2,717,932
CMO Series 2024-NQM1 Class A1
11/25/2063
5.928%
 
9,776,284
9,757,947
OBX Trust(a),(h)
CMO Series 2022-NQM7 Class A1
08/25/2062
5.110%
 
4,232,887
4,233,847
Oceanview Mortgage Loan Trust(a)
CMO Series 2020-1 Class A1A
05/28/2050
1.733%
 
717,459
645,506
Preston Ridge Partners Mortgage(a),(d)
CMO Series 2021-4 Class A1
04/25/2026
1.867%
 
5,755,126
5,612,699
Preston Ridge Partners Mortgage Trust(a),(d)
CMO Series 2021-10 Class A1
10/25/2026
2.487%
 
2,997,846
2,892,077
CMO Series 2021-2 Class A1
03/25/2026
2.115%
 
1,543,337
1,516,172
CMO Series 2021-3 Class A1
04/25/2026
1.867%
 
2,353,214
2,292,864
CMO Series 2021-9 Class A1
10/25/2026
2.363%
 
4,949,478
4,823,183
PRET LLC(a),(d),(e),(f)
CMO Series 2024-RN1 Class A1
03/25/2054
7.143%
 
6,000,000
5,999,996
Pretium Mortgage Credit Partners I LLC(a),(d)
CMO Series 2021-NPL1 Class A1
09/27/2060
2.240%
 
1,284,973
1,265,042
CMO Series 2021-NPL2 Class A1
06/27/2060
1.992%
 
1,459,812
1,414,832
Pretium Mortgage Credit Partners LLC(a),(d)
CMO Series 2021-NPL3 Class A1
07/25/2051
1.868%
 
7,082,900
6,846,108
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
19

Portfolio of Investments (continued)
March 31, 2024
Residential Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
CMO Series 2021-NPL6 Class A1
07/25/2051
2.487%
 
5,113,278
4,988,535
PRKCM Trust(a),(d)
CMO Series 2021-AFC2 Class A1
11/25/2056
2.071%
 
12,145,491
10,245,974
PRPM LLC(a),(d)
CMO Series 2021-RPL1 Class A1
07/25/2051
1.319%
 
1,454,226
1,303,323
PRPM LLC(a),(c),(d)
CMO Series 2024-RCF2 Class A1
03/25/2054
3.750%
 
6,175,000
5,877,243
PRPM Trust(a),(d)
CMO Series 2023-NQM1 Class A1
01/25/2068
6.234%
 
2,190,831
2,201,587
CMO Series 2023-NQM3 Class A1
11/25/2068
6.221%
 
4,528,704
4,531,111
CMO Series 2024-NQM1 Class A1
12/25/2068
6.265%
 
2,175,000
2,176,083
RCO Mortgage LLC(a),(d)
CMO Series 2024-1 Class A1
01/25/2029
7.021%
 
1,055,849
1,052,693
Sequoia Mortgage Trust(a),(d)
CMO Series 2016-3 Class A1
11/25/2046
3.500%
 
575,616
510,975
Starwood Mortgage Residential Trust(a),(d)
CMO Series 2019-INV1 Class A3
09/27/2049
2.916%
 
1,523,081
1,463,077
CMO Series 2020-INV1 Class A3
11/25/2055
1.593%
 
311,127
286,603
Towd Point HE Trust(a),(d)
CMO Series 2021-HE1 Class M2
02/25/2063
2.500%
 
1,150,000
1,046,717
Towd Point Mortgage Trust(a),(d)
CMO Series 2021-SJ2 Class A1A
12/25/2061
2.250%
 
3,513,278
3,276,039
VCAT Asset Securitization LLC(a),(d)
CMO Series 2021-NPL6 Class A1
09/25/2051
1.917%
 
1,875,954
1,818,092
VCAT LLC(a),(d)
CMO Series 2021-NPL1 Class A1
12/26/2050
2.289%
 
200,538
198,859
Vericrest Opportunity Loan Transferee(a),(d)
CMO Series 2021-NPL4 Class A1
03/27/2051
2.240%
 
2,491,237
2,439,180
Vericrest Opportunity Loan Transferee XCVI LLC(a),(d)
CMO Series 2021-NPL5 Class A1
03/27/2051
5.116%
 
1,375,446
1,345,690
Residential Mortgage-Backed Securities - Non-Agency (continued)
Issuer
Coupon
Rate
 
Principal
Amount ($)
Value ($)
Vericrest Opportunity Loan Transferee XCVII LLC(a),(d)
CMO Series 2021-NPL6 Class A1
04/25/2051
2.240%
 
6,290,810
6,169,008
Vericrest Opportunity Loan Trust CI LLC(a),(d)
CMO Series 2021-NP10 Class A1
05/25/2051
1.992%
 
5,480,712
5,322,045
Verus Securitization Trust(a),(d)
CMO Series 2019-4 Class A3
11/25/2059
3.000%
 
1,298,339
1,255,855
CMO Series 2020-2 Class A1
05/25/2060
2.226%
 
116,336
114,930
CMO Series 2021-8 Class A3
11/25/2066
2.491%
 
7,839,275
6,745,224
CMO Series 2022-INV1 Class A1
08/25/2067
5.041%
 
2,969,176
2,946,166
CMO Series 2023-6 Class A2
09/25/2068
6.939%
 
1,036,976
1,047,487
CMO Series 2023-8 Class A1
12/25/2068
6.259%
 
4,041,099
4,055,938
CMO Series 2024-1 Class A1
01/25/2069
5.712%
 
4,224,334
4,197,953
CMO Series 2024-INV1 Class A1
03/25/2069
6.116%
 
2,275,000
2,282,358
Visio Trust(a),(d)
CMO Series 2019-2 Class A3
11/25/2054
3.076%
 
669,999
635,370
Visio Trust(a)
Series 2020-1R Class A1
11/25/2055
1.312%
 
3,081,071
2,838,792
Wells Fargo Mortgage-Backed Securities Trust(d)
CMO Series 2006-AR19 Class A1
12/25/2036
6.356%
 
56,155
53,746
Total Residential Mortgage-Backed Securities - Non-Agency
(Cost $263,044,624)
250,842,346
U.S. Treasury Obligations 1.0%
 
 
 
 
 
U.S. Treasury
08/31/2025
0.250%
 
9,000,000
8,438,555
Total U.S. Treasury Obligations
(Cost $8,490,174)
8,438,555
The accompanying Notes to Financial Statements are an integral part of this statement.
20
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Money Market Funds 4.4%
 
Shares
Value ($)
Columbia Short-Term Cash Fund, 5.543%(j),(k)
37,422,095
37,414,611
Total Money Market Funds
(Cost $37,411,269)
37,414,611
Total Investments in Securities
(Cost: $893,534,957)
876,863,004
Other Assets & Liabilities, Net
 
(25,493,005
)
Net Assets
851,369,999
At March 31, 2024, securities and/or cash totaling $1,450,500 were pledged as collateral.
Investments in derivatives
Long futures contracts
Description
Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
U.S. Treasury 2-Year Note
953
06/2024
USD
194,873,610
(251,248
)
Short futures contracts
Description
Number of
contracts
Expiration
date
Trading
currency
Notional
amount
Value/Unrealized
appreciation ($)
Value/Unrealized
depreciation ($)
U.S. Treasury 5-Year Note
(968)
06/2024
USD
(103,591,125
)
(162,046
)
Notes to Portfolio of Investments
(a)
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. At March 31, 2024, the total value of these securities amounted to $611,853,458, which represents 71.87% of total net assets.
(b)
Variable rate security. The interest rate shown was the current rate as of March 31, 2024.
(c)
Represents a security purchased on a when-issued basis.
(d)
Variable or floating rate security, the interest rate of which adjusts periodically based on changes in current interest rates and prepayments on the underlying pool of assets. The interest rate shown was the current rate as of March 31, 2024.
(e)
Represents fair value as determined in good faith under procedures approved by the Board of Trustees. At March 31, 2024, the total value of these securities amounted to $7,449,985, which represents 0.88% of total net assets.
(f)
Valuation based on significant unobservable inputs.
(g)
Payment-in-kind security. Interest can be paid by issuing additional par of the security or in cash.
(h)
Represents a variable rate security with a step coupon where the rate adjusts according to a schedule for a series of periods, typically lower for an initial period and then increasing to a higher coupon rate thereafter. The interest rate shown was the current rate as of March 31, 2024.
(i)
Principal and interest may not be guaranteed by a governmental entity.
(j)
The rate shown is the seven-day current annualized yield at March 31, 2024.
(k)
As defined in the Investment Company Act of 1940, as amended, an affiliated company is one in which the Fund owns 5% or more of the company’s outstanding voting securities, or a company which is under common ownership or control with the Fund. The value of the holdings and transactions in these affiliated companies during the year ended March 31, 2024 are as follows:
Affiliated issuers
Beginning
of period($)
Purchases($)
Sales($)
Net change in
unrealized
appreciation
(depreciation)($)
End of
period($)
Realized gain
(loss)($)
Dividends($)
End of
period shares
Columbia Short-Term Cash Fund, 5.543%
 
14,430,292
366,310,815
(343,329,250
)
2,754
37,414,611
(5,777
)
1,087,695
37,422,095
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
21

Portfolio of Investments (continued)
March 31, 2024
Abbreviation Legend
CMO
Collateralized Mortgage Obligation
CMT
Constant Maturity Treasury
SOFR
Secured Overnight Financing Rate
TBA
To Be Announced
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.
The Fund’s Board of Trustees (the Board) has designated the Investment Manager, through its Valuation Committee (the Committee), as valuation designee, responsible for determining the fair value of the assets of the Fund for which market quotations are not readily available using 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 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.  Representatives of Columbia Management Investment Advisers, LLC report to 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 March 31, 2024:
 
Level 1 ($)
Level 2 ($)
Level 3 ($)
Total ($)
Investments in Securities
 
 
 
 
Asset-Backed Securities - Non-Agency
213,489,036
1,449,989
214,939,025
Commercial Mortgage-Backed Securities - Non-Agency
89,749,244
89,749,244
Corporate Bonds & Notes
269,659,698
269,659,698
Foreign Government Obligations
514,893
514,893
Residential Mortgage-Backed Securities - Agency
5,304,632
5,304,632
Residential Mortgage-Backed Securities - Non-Agency
244,842,350
5,999,996
250,842,346
U.S. Treasury Obligations
8,438,555
8,438,555
Money Market Funds
37,414,611
37,414,611
Total Investments in Securities
37,414,611
831,998,408
7,449,985
876,863,004
Investments in Derivatives
 
 
 
 
The accompanying Notes to Financial Statements are an integral part of this statement.
22
Columbia Short Term Bond Fund  | Annual Report 2024

Portfolio of Investments (continued)
March 31, 2024
Fair value measurements   (continued)
 
Level 1 ($)
Level 2 ($)
Level 3 ($)
Total ($)
Liability
 
 
 
 
Futures Contracts
(413,294
)
(413,294
)
Total
37,001,317
831,998,408
7,449,985
876,449,710
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.
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.
Columbia Short Term Bond Fund  | Annual Report 2024
23

Statement of Assets and Liabilities
March 31, 2024
Assets
 
Investments in securities, at value
 
Unaffiliated issuers (cost $856,123,688)
$839,448,393
Affiliated issuers (cost $37,411,269)
37,414,611
Margin deposits on:
 
Futures contracts
1,450,500
Receivable for:
 
Investments sold
581,944
Investments sold on a delayed delivery basis
11,083
Capital shares sold
6,193,464
Dividends
164,395
Interest
4,910,774
Foreign tax reclaims
890
Variation margin for futures contracts
113,438
Expense reimbursement due from Investment Manager
3,511
Prepaid expenses
7,002
Total assets
890,300,005
Liabilities
 
Due to custodian
33,235
Payable for:
 
Investments purchased
14,171,283
Investments purchased on a delayed delivery basis
16,995,555
Capital shares redeemed
4,209,669
Distributions to shareholders
2,939,087
Variation margin for futures contracts
193,577
Management services fees
9,912
Distribution and/or service fees
1,689
Transfer agent fees
55,996
Compensation of chief compliance officer
1
Compensation of board members
2,197
Other expenses
49,100
Deferred compensation of board members
268,705
Total liabilities
38,930,006
Net assets applicable to outstanding capital stock
$851,369,999
Represented by
 
Paid in capital
911,362,606
Total distributable earnings (loss)
(59,992,607
)
Total - representing net assets applicable to outstanding capital stock
$851,369,999
The accompanying Notes to Financial Statements are an integral part of this statement.
24
Columbia Short Term Bond Fund  | Annual Report 2024

Statement of Assets and Liabilities (continued)
March 31, 2024
Class A
 
Net assets
$216,784,847
Shares outstanding
22,453,758
Net asset value per share
$9.65
Maximum sales charge
1.00%
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)
$9.75
Advisor Class
 
Net assets
$43,360,527
Shares outstanding
4,497,456
Net asset value per share
$9.64
Class C
 
Net assets
$9,619,240
Shares outstanding
998,609
Net asset value per share
$9.63
Institutional Class
 
Net assets
$283,666,695
Shares outstanding
29,422,356
Net asset value per share
$9.64
Institutional 2 Class
 
Net assets
$33,417,120
Shares outstanding
3,470,952
Net asset value per share
$9.63
Institutional 3 Class
 
Net assets
$264,306,507
Shares outstanding
27,430,762
Net asset value per share
$9.64
Class R
 
Net assets
$215,063
Shares outstanding
22,282
Net asset value per share
$9.65
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
25

Statement of Operations
Year Ended March 31, 2024
Net investment income
 
Income:
 
Dividends — affiliated issuers
$1,087,695
Interest
34,030,204
Interfund lending
2,814
Total income
35,120,713
Expenses:
 
Management services fees
3,328,547
Distribution and/or service fees
 
Class A
516,966
Class C
76,117
Class R
5,855
Transfer agent fees
 
Class A
269,889
Advisor Class
53,459
Class C
12,433
Institutional Class
261,751
Institutional 2 Class
14,567
Institutional 3 Class
16,525
Class R
1,536
Custodian fees
18,128
Printing and postage fees
62,823
Registration fees
136,153
Accounting services fees
41,499
Legal fees
21,759
Compensation of chief compliance officer
146
Compensation of board members
20,172
Deferred compensation of board members
47,362
Other
23,728
Total expenses
4,929,415
Fees waived or expenses reimbursed by Investment Manager and its affiliates
(1,217,899
)
Fees waived by transfer agent
 
Institutional 2 Class
(1,645
)
Institutional 3 Class
(16,525
)
Expense reduction
(1,255
)
Total net expenses
3,692,091
Net investment income
31,428,622
Realized and unrealized gain (loss) — net
 
Net realized gain (loss) on:
 
Investments — unaffiliated issuers
(9,519,514
)
Investments — affiliated issuers
(5,777
)
Futures contracts
(2,062,229
)
Net realized loss
(11,587,520
)
Net change in unrealized appreciation (depreciation) on:
 
Investments — unaffiliated issuers
27,856,664
Investments — affiliated issuers
2,754
Futures contracts
(1,053,067
)
Net change in unrealized appreciation (depreciation)
26,806,351
Net realized and unrealized gain
15,218,831
Net increase in net assets resulting from operations
$46,647,453
The accompanying Notes to Financial Statements are an integral part of this statement.
26
Columbia Short Term Bond Fund  | Annual Report 2024

Statement of Changes in Net Assets
 
Year Ended
March 31, 2024
Year Ended
March 31, 2023
Operations
 
 
Net investment income
$31,428,622
$29,767,270
Net realized loss
(11,587,520
)
(23,597,586
)
Net change in unrealized appreciation (depreciation)
26,806,351
(11,501,044
)
Net increase (decrease) in net assets resulting from operations
46,647,453
(5,331,360
)
Distributions to shareholders
 
 
Net investment income and net realized gains
 
 
Class A
(8,091,732
)
(5,640,936
)
Advisor Class
(1,706,768
)
(1,392,720
)
Class C
(319,587
)
(237,899
)
Institutional Class
(8,439,933
)
(5,380,133
)
Institutional 2 Class
(1,103,797
)
(558,766
)
Institutional 3 Class
(12,512,394
)
(16,057,156
)
Class R
(42,333
)
(27,079
)
Total distributions to shareholders
(32,216,544
)
(29,294,689
)
Decrease in net assets from capital stock activity
(98,608,423
)
(260,425,518
)
Total decrease in net assets
(84,177,514
)
(295,051,567
)
Net assets at beginning of year
935,547,513
1,230,599,080
Net assets at end of year
$851,369,999
$935,547,513
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
27

Statement of Changes in Net Assets  (continued)
 
Year Ended
Year Ended
 
March 31, 2024
March 31, 2023
 
Shares
Dollars ($)
Shares
Dollars ($)
Capital stock activity
Class A
 
 
 
 
Shares sold
6,362,569
60,581,182
5,346,913
50,626,672
Distributions reinvested
784,121
7,453,702
547,091
5,167,767
Shares redeemed
(7,157,235
)
(67,995,859
)
(7,311,267
)
(69,275,307
)
Net increase (decrease)
(10,545
)
39,025
(1,417,263
)
(13,480,868
)
Advisor Class
 
 
 
 
Shares sold
1,706,901
16,202,967
966,576
9,108,579
Distributions reinvested
117,749
1,118,427
91,815
866,267
Shares redeemed
(1,617,670
)
(15,355,307
)
(3,856,273
)
(36,685,755
)
Net increase (decrease)
206,980
1,966,087
(2,797,882
)
(26,710,909
)
Class C
 
 
 
 
Shares sold
334,475
3,171,322
594,842
5,635,677
Distributions reinvested
33,063
313,506
24,643
232,066
Shares redeemed
(455,614
)
(4,308,821
)
(893,344
)
(8,449,569
)
Net decrease
(88,076
)
(823,993
)
(273,859
)
(2,581,826
)
Institutional Class
 
 
 
 
Shares sold
22,039,295
210,242,129
7,629,513
72,315,387
Distributions reinvested
749,026
7,116,676
484,176
4,567,393
Shares redeemed
(13,151,844
)
(125,123,287
)
(8,725,765
)
(82,551,906
)
Net increase (decrease)
9,636,477
92,235,518
(612,076
)
(5,669,126
)
Institutional 2 Class
 
 
 
 
Shares sold
1,572,152
14,967,842
1,075,507
10,121,264
Distributions reinvested
116,264
1,103,742
59,227
558,742
Shares redeemed
(533,585
)
(5,067,127
)
(1,570,307
)
(14,854,347
)
Net increase (decrease)
1,154,831
11,004,457
(435,573
)
(4,174,341
)
Institutional 3 Class
 
 
 
 
Shares sold
6,841,866
64,789,807
19,241,095
181,647,534
Distributions reinvested
153,124
1,452,844
614,422
5,797,426
Shares redeemed
(28,389,273
)
(268,249,022
)
(41,808,162
)
(395,344,994
)
Net decrease
(21,394,283
)
(202,006,371
)
(21,952,645
)
(207,900,034
)
Class R
 
 
 
 
Shares sold
9,128
86,723
82,097
791,081
Distributions reinvested
4,141
39,304
2,649
25,002
Shares redeemed
(119,198
)
(1,149,173
)
(75,109
)
(724,497
)
Net increase (decrease)
(105,929
)
(1,023,146
)
9,637
91,586
Total net decrease
(10,600,545
)
(98,608,423
)
(27,479,661
)
(260,425,518
)
The accompanying Notes to Financial Statements are an integral part of this statement.
28
Columbia Short Term Bond Fund  | Annual Report 2024

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Columbia Short Term Bond Fund  | Annual Report 2024
29

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 ratios of expenses and net investment income are 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
Total
distributions to
shareholders
Class A
Year Ended 3/31/2024
$9.47
0.36
0.19
0.55
(0.37
)
(0.37
)
Year Ended 3/31/2023
$9.75
0.25
(0.28
)
(0.03
)
(0.25
)
(0.25
)
Year Ended 3/31/2022
$10.11
0.12
(0.35
)
(0.23
)
(0.13
)
(0.13
)
Year Ended 3/31/2021
$9.37
0.18
0.73
0.91
(0.17
)
(0.17
)
Year Ended 3/31/2020
$9.98
0.26
(0.54
)
(0.28
)
(0.33
)
(0.33
)
Advisor Class
Year Ended 3/31/2024
$9.46
0.38
0.19
0.57
(0.39
)
(0.39
)
Year Ended 3/31/2023
$9.74
0.26
(0.27
)
(0.01
)
(0.27
)
(0.27
)
Year Ended 3/31/2022
$10.10
0.14
(0.35
)
(0.21
)
(0.15
)
(0.15
)
Year Ended 3/31/2021
$9.36
0.20
0.74
0.94
(0.20
)
(0.20
)
Year Ended 3/31/2020
$9.96
0.29
(0.53
)
(0.24
)
(0.36
)
(0.36
)
Class C
Year Ended 3/31/2024
$9.45
0.31
0.19
0.50
(0.32
)
(0.32
)
Year Ended 3/31/2023
$9.73
0.19
(0.28
)
(0.09
)
(0.19
)
(0.19
)
Year Ended 3/31/2022
$10.08
0.07
(0.35
)
(0.28
)
(0.07
)
(0.07
)
Year Ended 3/31/2021
$9.35
0.12
0.72
0.84
(0.11
)
(0.11
)
Year Ended 3/31/2020
$9.96
0.20
(0.54
)
(0.34
)
(0.27
)
(0.27
)
Institutional Class
Year Ended 3/31/2024
$9.46
0.39
0.18
0.57
(0.39
)
(0.39
)
Year Ended 3/31/2023
$9.74
0.27
(0.28
)
(0.01
)
(0.27
)
(0.27
)
Year Ended 3/31/2022
$10.09
0.15
(0.35
)
(0.20
)
(0.15
)
(0.15
)
Year Ended 3/31/2021
$9.36
0.20
0.73
0.93
(0.20
)
(0.20
)
Year Ended 3/31/2020
$9.96
0.29
(0.53
)
(0.24
)
(0.36
)
(0.36
)
Institutional 2 Class
Year Ended 3/31/2024
$9.45
0.39
0.19
0.58
(0.40
)
(0.40
)
Year Ended 3/31/2023
$9.73
0.27
(0.27
)
0.00
(0.28
)
(0.28
)
Year Ended 3/31/2022
$10.08
0.16
(0.35
)
(0.19
)
(0.16
)
(0.16
)
Year Ended 3/31/2021
$9.35
0.21
0.72
0.93
(0.20
)
(0.20
)
Year Ended 3/31/2020
$9.95
0.29
(0.52
)
(0.23
)
(0.37
)
(0.37
)
The accompanying Notes to Financial Statements are an integral part of this statement.
30
Columbia Short Term Bond Fund  | Annual Report 2024

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 3/31/2024
$9.65
5.93%
0.86%
0.70%
(c)
3.83%
81%
$216,785
Year Ended 3/31/2023
$9.47
(0.31%
)
0.84%
0.72%
(c)
2.61%
35%
$212,800
Year Ended 3/31/2022
$9.75
(2.33%
)
0.84%
0.74%
(c)
1.22%
96%
$232,895
Year Ended 3/31/2021
$10.11
9.77%
0.85%
0.77%
(c)
1.77%
173%
$240,561
Year Ended 3/31/2020
$9.37
(2.94%
)
0.85%
0.78%
(c)
2.61%
169%
$216,266
Advisor Class
Year Ended 3/31/2024
$9.64
6.20%
0.61%
0.45%
(c)
4.08%
81%
$43,361
Year Ended 3/31/2023
$9.46
(0.07%
)
0.59%
0.47%
(c)
2.79%
35%
$40,585
Year Ended 3/31/2022
$9.74
(2.09%
)
0.59%
0.49%
(c)
1.43%
96%
$69,029
Year Ended 3/31/2021
$10.10
10.06%
0.60%
0.52%
(c)
2.03%
173%
$7,409
Year Ended 3/31/2020
$9.36
(2.60%
)
0.60%
0.53%
(c)
2.87%
169%
$7,103
Class C
Year Ended 3/31/2024
$9.63
5.35%
1.41%
1.25%
(c)
3.27%
81%
$9,619
Year Ended 3/31/2023
$9.45
(0.86%
)
1.39%
1.27%
(c)
2.02%
35%
$10,270
Year Ended 3/31/2022
$9.73
(2.77%
)
1.46%
1.29%
(c)
0.68%
96%
$13,238
Year Ended 3/31/2021
$10.08
9.06%
1.60%
1.34%
(c),(d)
1.22%
173%
$16,981
Year Ended 3/31/2020
$9.35
(3.53%
)
1.60%
1.38%
(c),(d)
2.02%
169%
$21,157
Institutional Class
Year Ended 3/31/2024
$9.64
6.20%
0.61%
0.45%
(c)
4.11%
81%
$283,667
Year Ended 3/31/2023
$9.46
(0.07%
)
0.59%
0.47%
(c)
2.86%
35%
$187,176
Year Ended 3/31/2022
$9.74
(1.99%
)
0.59%
0.49%
(c)
1.47%
96%
$198,640
Year Ended 3/31/2021
$10.09
9.95%
0.60%
0.52%
(c)
2.03%
173%
$189,774
Year Ended 3/31/2020
$9.36
(2.60%
)
0.60%
0.53%
(c)
2.87%
169%
$167,429
Institutional 2 Class
Year Ended 3/31/2024
$9.63
6.28%
0.54%
0.37%
4.19%
81%
$33,417
Year Ended 3/31/2023
$9.45
0.01%
0.51%
0.39%
2.88%
35%
$21,879
Year Ended 3/31/2022
$9.73
(1.92%
)
0.52%
0.42%
1.57%
96%
$26,761
Year Ended 3/31/2021
$10.08
10.04%
0.52%
0.44%
2.08%
173%
$11,814
Year Ended 3/31/2020
$9.35
(2.52%
)
0.51%
0.44%
2.94%
169%
$22,420
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
31

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
Total
distributions to
shareholders
Institutional 3 Class
Year Ended 3/31/2024
$9.45
0.39
0.20
0.59
(0.40
)
(0.40
)
Year Ended 3/31/2023
$9.73
0.28
(0.28
)
0.00
(0.28
)
(0.28
)
Year Ended 3/31/2022
$10.09
0.16
(0.35
)
(0.19
)
(0.17
)
(0.17
)
Year Ended 3/31/2021
$9.36
0.21
0.73
0.94
(0.21
)
(0.21
)
Year Ended 3/31/2020
$9.96
0.30
(0.53
)
(0.23
)
(0.37
)
(0.37
)
Class R
Year Ended 3/31/2024
$9.47
0.33
0.19
0.52
(0.34
)
(0.34
)
Year Ended 3/31/2023
$9.75
0.23
(0.29
)
(0.06
)
(0.22
)
(0.22
)
Year Ended 3/31/2022
$10.11
0.10
(0.36
)
(0.26
)
(0.10
)
(0.10
)
Year Ended 3/31/2021
$9.37
0.15
0.74
0.89
(0.15
)
(0.15
)
Year Ended 3/31/2020
$9.98
0.24
(0.54
)
(0.30
)
(0.31
)
(0.31
)
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 the impact of voluntary waivers paid by the Investment Manager. For the periods indicated below, if the Investment Manager had not paid these voluntary waivers, the Fund’s net expense ratio would increase by:
 
3/31/2021
3/31/2020
Class C
0.06%
0.15%
The accompanying Notes to Financial Statements are an integral part of this statement.
32
Columbia Short Term Bond Fund  | Annual Report 2024

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)
Institutional 3 Class
Year Ended 3/31/2024
$9.64
6.45%
0.48%
0.32%
4.18%
81%
$264,307
Year Ended 3/31/2023
$9.45
0.06%
0.46%
0.34%
2.93%
35%
$461,623
Year Ended 3/31/2022
$9.73
(1.97%
)
0.46%
0.37%
1.60%
96%
$688,879
Year Ended 3/31/2021
$10.09
10.09%
0.47%
0.39%
2.16%
173%
$547,413
Year Ended 3/31/2020
$9.36
(2.47%
)
0.46%
0.39%
3.00%
169%
$514,116
Class R
Year Ended 3/31/2024
$9.65
5.65%
1.11%
0.95%
(c)
3.55%
81%
$215
Year Ended 3/31/2023
$9.47
(0.56%
)
1.09%
0.97%
(c)
2.39%
35%
$1,214
Year Ended 3/31/2022
$9.75
(2.57%
)
1.09%
0.99%
(c)
0.98%
96%
$1,156
Year Ended 3/31/2021
$10.11
9.50%
1.10%
1.02%
(c)
1.54%
173%
$1,216
Year Ended 3/31/2020
$9.37
(3.18%
)
1.10%
1.03%
(c)
2.37%
169%
$1,966
The accompanying Notes to Financial Statements are an integral part of this statement.
Columbia Short Term Bond Fund  | Annual Report 2024
33

Notes to Financial Statements
March 31, 2024
Note 1. Organization
Columbia Short Term Bond 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 net investment income 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 8 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.
The Fund’s Board of Trustees approved a proposal to liquidate Class R shares of the Fund. Effective on March 11, 2024, Class R shares of the Fund were closed to new and existing investors and effective on April 19, 2024, Class R shares of the Fund were liquidated. For federal tax purposes, this liquidation was treated as a redemption of fund shares.
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
Debt securities generally are valued based on prices obtained from pricing services, which are intended to reflect 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 market value, unless this method results in a valuation that management believes does not approximate fair value.
Asset- and mortgage-backed securities are generally valued by pricing services, which utilize pricing models that incorporate the securities’ cash flow and loan performance data. These models also take into account available market data, including trades, market quotations, and benchmark yield curves for identical or similar securities. Factors used to identify similar securities may include, but are not limited to, issuer, collateral type, vintage, prepayment speeds, collateral performance, credit ratings, credit enhancement and expected life. Asset-backed securities for which quotations are readily available may also be valued based upon an over-the-counter or exchange bid quote from an approved independent broker-dealer. Debt securities maturing in 60 days or less are valued primarily at amortized market value, unless this method results in a valuation that management believes does not approximate fair value.
34
Columbia Short Term Bond Fund  | Annual Report 2024

Notes to Financial Statements (continued)
March 31, 2024
Investments in open-end investment companies (other than exchange-traded funds (ETFs)), are valued at the latest net asset value reported by those companies as of the valuation time.
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 a settlement price, 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 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, in seeking 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 provides some protection in the case of clearing member default. The clearinghouse or central counterparty stands between the buyer and the seller of the contract; therefore, failure of the clearinghouse or central counterparty may pose additional counterparty credit risk. 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 clearing brokers are required to segregate customer margin from their own assets, in the event that a clearing broker becomes insolvent or goes into bankruptcy and at that time there is a shortfall in the aggregate amount of margin held by the clearing broker for all its clients and such shortfall is remedied by the central counterparty or otherwise, U.S. bankruptcy laws will typically allocate that shortfall on a pro-rata basis across all the clearing 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 counterparties. An ISDA Master Agreement is an agreement between the Fund and a counterparty that governs over-the-counter derivatives and foreign exchange forward contracts and 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 instruments’ payables and/or receivables with collateral held and/or posted and create one single net payment. The provisions of the
Columbia Short Term Bond Fund  | Annual Report 2024
35

Notes to Financial Statements (continued)
March 31, 2024
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 central counterparty for exchange-traded and centrally cleared derivatives. Brokers can ask for margin in excess of the minimum in certain circumstances. Collateral terms for most over-the-counter derivatives are subject to regulatory requirements to exchange variation margin with trading counterparties and may have contract specific margin terms as well. 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 or receive interest income on cash collateral pledged to the broker. 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 manage the duration and yield curve exposure of the Fund versus the benchmark and to manage exposure to movements in interest rates. 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 generally expects to earn interest income on its margin deposits. 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.
36
Columbia Short Term Bond Fund  | Annual Report 2024

Notes to Financial Statements (continued)
March 31, 2024
The following table is a summary of the fair value of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) at March 31, 2024:
 
Liability derivatives
 
Risk exposure
category
Statement
of assets and liabilities
location
Fair value ($)
Interest rate risk
Component of total distributable earnings (loss) — unrealized depreciation on futures contracts
413,294
*
*
Includes cumulative appreciation (depreciation) as reported in the tables following the Portfolio of Investments. Only the current day’s variation margin for futures and centrally cleared swaps, if any, is reported in receivables or payables in the Statement of Assets and Liabilities.
The following table indicates the effect of derivative instruments (not considered to be hedging instruments for accounting disclosure purposes) in the Statement of Operations for the year ended March 31, 2024:
Amount of realized gain (loss) on derivatives recognized in income
Risk exposure category
Futures
contracts
($)
Interest rate risk
(2,062,229
)
Change in unrealized appreciation (depreciation) on derivatives recognized in income
Risk exposure category
Futures
contracts
($)
Interest rate risk
(1,053,067
)
The following table is a summary of the average daily outstanding volume by derivative instrument for the year ended March 31, 2024:
Derivative instrument
Average notional
amounts ($)
Futures contracts — long
224,336,524
Futures contracts — short
97,260,229
Asset- and mortgage-backed securities
The Fund may invest in asset-backed and mortgage-backed securities. The maturity dates shown represent the original maturity of the underlying obligation. Actual maturity may vary based upon prepayment activity on these obligations. All, or a portion, of the obligation may be prepaid at any time because the underlying asset may be prepaid. As a result, decreasing market interest rates could result in an increased level of prepayment. An increased prepayment rate will have the effect of shortening the maturity of the security. Unless otherwise noted, the coupon rates presented are fixed rates.
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.
To be announced securities
The Fund may trade securities on a To Be Announced (TBA) basis. As with other delayed-delivery transactions, a seller agrees to issue a TBA security at a future date. However, the seller does not specify the particular securities to be delivered. Instead, the Fund agrees to accept any security that meets specified terms.
Columbia Short Term Bond Fund  | Annual Report 2024
37

Notes to Financial Statements (continued)
March 31, 2024
In some cases, Master Securities Forward Transaction Agreements (MSFTAs) may be used to govern transactions of certain forward-settling agency mortgage-backed securities, such as delayed-delivery and TBAs, between the Fund and counterparty. The MSFTA maintains provisions for, among other things, initiation and confirmation, payment and transfer, events of default, termination, and maintenance of collateral relating to such transactions.
Mortgage dollar roll transactions
The Fund may enter into mortgage “dollar rolls” in which the Fund sells securities for delivery in the current month and simultaneously contracts with the same counterparty to repurchase similar but not identical securities (same type, coupon and maturity) on a specified future date. These transactions may increase the Fund’s portfolio turnover rate. During the roll period, the Fund loses the right to receive principal and interest paid on the securities sold. However, the Fund may benefit because it receives negotiated amounts in the form of reductions of the purchase price for the future purchase plus the interest earned on the cash proceeds of the securities sold until the settlement date of the forward purchase. The Fund records the incremental difference between the forward purchase and sale of each forward roll as a realized gain or loss. Unless any realized gains exceed the income, capital appreciation, and gain or loss due to mortgage prepayments that would have been realized on the securities sold as part of the mortgage dollar roll, the use of this technique may diminish the investment performance of the Fund compared to what the performance would have been without the use of mortgage dollar rolls. Mortgage dollar rolls involve the risk that the market value of the securities the Fund is obligated to repurchase may decline below the repurchase price, or that the counterparty may default on its obligations. All cash proceeds will be invested in instruments that are permissible investments for the Fund. The Fund identifies cash or liquid securities in an amount equal to the forward purchase price. The Fund does not currently enter into mortgage dollar rolls that are accounted for as financing transactions.
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. The Fund classifies gains and losses realized on prepayments received on mortgage-backed securities as adjustments to interest income.
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. The Fund may also adjust accrual rates when it becomes probable the full interest will not be collected and a partial payment will be received. A defaulted debt security is removed from non-accrual status when the issuer resumes interest payments or when collectability of interest is reasonably assured.
Dividend income is recorded on the ex-dividend date.
The value of additional securities received as an income payment through a payment-in-kind, if any, is recorded as interest income and increases the cost basis of such securities.
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.
38
Columbia Short Term Bond Fund  | Annual Report 2024

Notes to Financial Statements (continued)
March 31, 2024
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 in the Statement of Assets and Liabilities.
Distributions to shareholders
Distributions from net investment income, if any, are declared daily and paid monthly. 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.
Recent accounting pronouncements and regulatory updates
Tailored Shareholder Reports
In October 2022, the Securities and Exchange Commission adopted a final rule, "Tailored Shareholder Reports for Mutual Funds and Exchange-Traded Funds; Fee Information in Investment Company Advertisements." The rule and form amendments will, among other things, require the Fund to transmit concise and visually engaging shareholder reports that highlight key information. The amendments will require that funds tag information in a structured data format and that certain more in-depth information be made available online and available for delivery free of charge to investors on request. The amendments became effective January 24, 2023. There is an 18-month transition period after the effective date of the amendments.
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 0.43% to 0.28% as the Fund’s net assets increase. The effective management services fee rate for the year ended March 31, 2024 was 0.43% of the Fund’s average daily net assets.
Columbia Short Term Bond Fund  | Annual Report 2024
39

Notes to Financial Statements (continued)
March 31, 2024
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. The expense for the Deferred Plan, which includes Trustees’ fees deferred during the current period as well as any gains or losses on the Trustees’ deferred compensation balances as a result of market fluctuations, is included in "Deferred compensation of board members" in the Statement of Operations.
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 SS&C GIDS, Inc. (SS&C GIDS) to serve as sub-transfer agent. The Transfer Agent pays the fees of SS&C GIDS for services as sub-transfer agent and SS&C GIDS 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 July 31, 2024, 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 March 31, 2024, 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
0.13
Advisor Class
0.13
Class C
0.13
Institutional Class
0.13
Institutional 2 Class
0.05
Institutional 3 Class
0.00
Class R
0.13
40
Columbia Short Term Bond Fund  | Annual Report 2024

Notes to Financial Statements (continued)
March 31, 2024
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 March 31, 2024, these minimum account balance fees reduced total expenses of the Fund by $1,255.
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 0.55% 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 March 31, 2024, if any, are listed below:
 
Front End (%)
CDSC (%)
Amount ($)
Class A
1.00
0.50 - 1.00
(a)
291,632
Class C
1.00
(b)
603
(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 classes’ average daily net assets:
 
Fee rate(s) contractual
through
July 31, 2024
Class A
0.71
%
Advisor Class
0.46
Class C
1.26
Institutional Class
0.46
Institutional 2 Class
0.37
Institutional 3 Class
0.32
Class R
0.96
In addition, 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) through July 31, 2024, 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
Columbia Short Term Bond Fund  | Annual Report 2024
41

Notes to Financial Statements (continued)
March 31, 2024
Fund’s custodian, will not exceed the annual rates of 0.74% for Class A, 0.49% for Advisor Class, 1.29% for Class C, 0.49% for Institutional Class, 0.42% for Institutional 2 Class, 0.37% for Institutional 3 Class and 0.99% for Class R as a percentage of the classes’ average daily net assets. Effective July 31, 2023, this arrangement was terminated and an updated agreement with lower annual expense cap rates as reflected in the table above has been implemented.
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, costs associated with shareholder meetings, 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. This arrangement may be revised or discontinued at any time. Reflected in the contractual cap commitments, effective December 11, 2021 through July 31, 2024, 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.
At March 31, 2024, these differences were primarily due to differing treatment for deferral/reversal of wash sale losses, derivative investments, tax straddles, principal and/or interest from fixed income securities, capital loss carryforwards, trustees’ deferred compensation and distributions. 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 ($)
104,445
(104,445
)
Net investment income (loss) and net realized gains (losses), as disclosed in the Statement of Operations, and net assets were not affected by this reclassification.
The tax character of distributions paid during the years indicated was as follows:
Year Ended March 31, 2024
Year Ended March 31, 2023
Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
Ordinary
income ($)
Long-term
capital gains ($)
Total ($)
32,216,544
32,216,544
29,294,689
29,294,689
Short-term capital gain distributions, if any, are considered ordinary income distributions for tax purposes.
42
Columbia Short Term Bond Fund  | Annual Report 2024

Notes to Financial Statements (continued)
March 31, 2024
At March 31, 2024, the components of distributable earnings on a tax basis were as follows:
Undistributed
ordinary income ($)
Undistributed
long-term
capital gains ($)
Capital loss
carryforwards ($)
Net unrealized
(depreciation) ($)
3,239,242
(42,665,261
)
(17,358,796
)
At March 31, 2024, 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) ($)
Net unrealized
(depreciation) ($)
893,808,506
2,995,864
(20,354,660
)
(17,358,796
)
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 March 31, 2024, may be available to reduce future net realized gains on investments, if any, to the extent permitted by the Internal Revenue Code. In addition, for the year ended March 31, 2024, capital loss carryforwards utilized, if any, were as follows:
No expiration
short-term ($)
No expiration
long-term ($)
Total ($)
Utilized ($)
(12,401,041
)
(30,264,220
)
(42,665,261
)
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 $630,078,924 and $730,910,058, respectively, for the year ended March 31, 2024, of which $192,370,744 and $195,182,406, respectively, were U.S. government securities. 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. The Securities and Exchange Commission has adopted amendments to money market fund rules requiring institutional prime money market funds like the Affiliated MMF to be subject to a discretionary liquidity fee of up to 2% if the imposition of such a fee is determined to be in the best interest of the Affiliated MMF and, by October 2, 2024, to a mandatory liquidity fee if daily net redemptions exceed 5% of net assets.
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 Short Term Bond Fund  | Annual Report 2024
43

Notes to Financial Statements (continued)
March 31, 2024
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 March 31, 2024 was as follows:
Borrower or lender
Average loan
balance ($)
Weighted average
interest rate (%)
Number of days
with outstanding loans
Lender
3,460,000
5.86
5
Interest income earned by the Fund is recorded as Interfund lending in the Statement of Operations. The Fund had no outstanding interfund loans at March 31, 2024.
Note 8. Line of credit
The Fund has access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A. whereby the Fund may borrow for the temporary funding of shareholder redemptions or for other temporary or emergency purposes. Pursuant to an October 26, 2023 amendment and restatement, the credit facility, which is an agreement between the Fund and certain other funds managed by the Investment Manager or an affiliated investment manager, severally and not jointly, permits aggregate borrowings up to $900 million. Interest is currently 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 secured overnight financing rate plus 0.10% 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 October unless extended or renewed. Prior to the October 26, 2023 amendment and restatement, the Fund had access to a revolving credit facility with a syndicate of banks led by JPMorgan Chase Bank, N.A., Citibank, N.A. and Wells Fargo Bank, N.A. which permitted collective borrowings up to $950 million. Interest was 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 secured overnight financing rate plus 0.10% and (iii) the overnight bank funding rate plus, in each case, 1.00%.
The Fund had no borrowings during the year ended March 31, 2024.
Note 9. Significant risks
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 interest rates rise, the values of debt instruments tend to fall, and if interest rates fall, the values of debt instruments tend to rise. Actions by governments and central banking authorities can result in increases or decreases in interest rates. Higher periods of inflation could lead such authorities to raise 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.
44
Columbia Short Term Bond Fund  | Annual Report 2024

Notes to Financial Statements (continued)
March 31, 2024
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 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 the Fund’s ability to price or value hard-to-value assets in thinly traded and closed markets and could cause 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, other conflicts, 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 large-scale invasion of Ukraine by Russia in February 2022 has resulted in sanctions and market disruptions, including declines in regional and global stock markets, unusual volatility in global commodity markets and significant devaluations of Russian currency. The extent and duration of the military action are impossible to predict but could continue to be significant. Market disruption caused by the Russian military action, and any countermeasures or responses thereto (including international sanctions, a downgrade in a country’s credit rating, purchasing and financing restrictions, boycotts, tariffs, changes in consumer or purchaser preferences, cyberattacks and espionage) could continue to have severe adverse impacts on regional and/or global securities and commodities markets, including markets for oil and natural gas. These impacts may include reduced market liquidity, distress in credit markets, further disruption of global supply chains, increased risk of inflation, restricted cross-border payments and limited access to investments and/or assets in certain international markets and/or issuers. These developments and other related events could negatively impact Fund performance.
Mortgage- and other asset-backed securities risk
The value of any mortgage-backed and other asset-backed securities including collateralized debt obligations, if any, held by the Fund may be affected by, among other things, changes or perceived changes in: interest rates; factors concerning the interests in and structure of the issuer or the originator of the mortgages or other assets; the creditworthiness of the entities that provide any supporting letters of credit, surety bonds or other credit enhancements; or the market’s assessment of the quality of underlying assets. Payment of principal and interest on some mortgage-backed securities (but not the market value of the securities themselves) may be guaranteed by the full faith and credit of a particular U.S. Government agency, authority, enterprise or instrumentality, and some, but not all, are also insured or guaranteed by the U.S. Government. Mortgage-backed securities issued by non-governmental issuers (such as commercial banks, savings and loan institutions, private mortgage insurance companies, mortgage bankers and other secondary market issuers) may entail greater risk than obligations guaranteed by the U.S. Government. Mortgage- and other asset-backed securities are subject to liquidity risk and prepayment risk. A decline or flattening of housing values may cause delinquencies in mortgages (especially sub-prime or non-prime mortgages) underlying mortgage-backed securities and thereby adversely affect the ability of the mortgage-backed securities issuer to make principal and/or interest payments to mortgage-backed securities holders, including the Fund. Rising or high interest rates tend to extend the duration of mortgage- and other asset-backed securities, making their prices more volatile and more sensitive to changes in interest rates.
Columbia Short Term Bond Fund  | Annual Report 2024
45

Notes to Financial Statements (continued)
March 31, 2024
Shareholder concentration risk
At March 31, 2024, one unaffiliated shareholder of record owned 23.8% 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 26.3% of the outstanding shares of the Fund in one or more accounts. Fund shares sold to or redeemed 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 in Note 1 above, there were 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 are involved in the normal course of business in legal proceedings which include regulatory inquiries, arbitration and litigation, including class actions concerning matters arising in connection with the conduct of their activities as part of a diversified financial services firm. 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 or one or more of its affiliates that provide services to the Fund.
46
Columbia Short Term Bond Fund  | Annual Report 2024

Report of Independent Registered Public Accounting Firm
To the Board of Trustees of Columbia Funds Series Trust and Shareholders of Columbia Short Term Bond Fund
Opinion on the Financial Statements
We have audited the accompanying statement of assets and liabilities, including the portfolio of investments, of Columbia Short Term Bond Fund (one of the funds constituting Columbia Funds Series Trust, referred to hereafter as the "Fund") as of March 31, 2024, the related statement of operations for the year ended March 31, 2024, the statement of changes in net assets for each of the two years in the period ended March 31, 2024, including the related notes, and the financial highlights for each of the five years in the period ended March 31, 2024 (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 March 31, 2024, 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 March 31, 2024 and the financial highlights for each of the five years in the period ended March 31, 2024 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 March 31, 2024 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
May 23, 2024
We have served as the auditor of one or more investment companies within the Columbia Funds Complex since 1977.
Columbia Short Term Bond Fund  | Annual Report 2024
47

Federal Income Tax Information
(Unaudited)
The Fund hereby designates the following tax attributes for the fiscal year ended March 31, 2024. Shareholders will be notified in early 2025 of the amounts for use in preparing 2024 income tax returns.
Section
163(j)
Interest
Dividends
 
99.84%
 
Section 163(j) Interest Dividends. The percentage of ordinary income distributed during the fiscal year that shareholders may treat as interest income for purposes of IRC Section 163(j), subject to holding period requirements and other limitations.
TRUSTEES AND OFFICERS
(Unaudited)
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. The year set forth beneath Length of Service in the table below is the year in which the Trustee was first appointed or elected as Trustee to any Fund currently in the Columbia Funds Complex or a predecessor thereof. Under current Board policy, each Trustee generally serves until December 31 of the year such Trustee turns seventy-five (75).
Independent trustees
Name,
address,
year of birth
Position held
with the Columbia
Funds 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
and other relevant Board
experience
George S. Batejan
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1954
Trustee since 2017
Executive Vice President, Global Head of Technology
and Operations, Janus Capital Group, Inc.,
2010-2016
161
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; former Board
Member, Chase Bank
International, 1993-1994
48
Columbia Short Term Bond Fund  | Annual Report 2024

TRUSTEES AND OFFICERS (continued)
(Unaudited)
Independent trustees (continued)
Name,
address,
year of birth
Position held
with the Columbia
Funds 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
and other relevant Board
experience
Kathleen Blatz
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1954
Trustee since 2006
Attorney, specializing in arbitration and mediation;
Trustee of Gerald Rauenhorst 1982 Trusts, since
2020; 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-July 2017; Interim President and
Chief Executive Officer, Blue Cross and Blue Shield of
Minnesota (health care insurance), February-July
2018, April-October 2021
161
Former Trustee, Blue Cross and
Blue Shield of Minnesota,
2009-2021 (Chair of the
Business Development
Committee, 2014-2017; Chair
of the Governance Committee,
2017-2019); former Member
and Chair of the Board,
Minnesota Sports Facilities
Authority, January 2017-July
2017; former Director, Robina
Foundation, 2009-2020
(Chair, 2014-2020); Director,
Richard M. Schulze Family
Foundation, since 2021
Pamela G. Carlton
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1954
Chair since 2023;
Trustee since 2007
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, 1982-1991, Morgan
Stanley; Attorney, Cleary Gottlieb Steen &
Hamilton LLP, 1980-1982
161
Trustee, New York Presbyterian
Hospital Board, since 1996;
Director, DR Bank (Audit
Committee, since 2017 and
Audit Committee Chair, since
November 2023); Director,
Evercore Inc. (Audit
Committee, Nominating and
Governance Committee)
(financial services company),
since 2019; Director, Apollo
Commercial Real Estate
Finance, Inc. (Chair,
Nominating and Governance
Committee), since 2021; the
Governing Council of the
Independent Directors Council
(IDC), since 2021
Janet Langford Carrig
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1957
Trustee since 1996
Senior Vice President, General Counsel and Corporate
Secretary, ConocoPhillips (independent energy
company), September 2007-October 2018
161
Director, EQT Corporation
(natural gas producer), since
2019; former Director, Whiting
Petroleum Corporation
(independent oil and gas
company), 2020-2022
J. Kevin Connaughton
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1964
Trustee since 2020
CEO and President, RhodeWay Financial (non-profit
financial planning firm), since December 2022;
Member, FINRA National Adjudicatory Council, January
2020-December 2023; Adjunct Professor of Finance,
Bentley University January 2018-April 2023;
Consultant to Independent Trustees of CFVIT and CFST
I from March 2016 to June 2020 with respect to CFVIT
and to December 2020 with respect to CFST I;
Managing Director and General Manager of Mutual
Fund Products, Columbia Management Investment
Advisers, LLC, May 2010-February 2015; President,
Columbia Funds, 2008-2015; and senior officer of
Columbia Funds and affiliated funds, 2003-2015
159
Former Director, The Autism
Project, March
2015-December 2021; former
Member of the Investment
Committee, St. Michael’s
College, November
2015-February 2020; former
Trustee, St. Michael’s College,
June 2017-September 2019;
former Trustee, New Century
Portfolios (former mutual fund
complex), January
2015-December 2017
Columbia Short Term Bond Fund  | Annual Report 2024
49

TRUSTEES AND OFFICERS (continued)
(Unaudited)
Independent trustees (continued)
Name,
address,
year of birth
Position held
with the Columbia
Funds 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
and other relevant Board
experience
Olive M. Darragh
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1962
Trustee since 2020
Managing Director of Darragh Inc. (strategy and talent
management consulting firm), since 2010; Founder
and CEO, Zolio, Inc. (investment management talent
identification platform), since 2004; Consultant to
Independent Trustees of CFVIT and CFST I from June
2019 to June 2020 with respect to CFVIT and to
December 2020 with respect to CFST I; Partner, Tudor
Investments, 2004-2010; Senior Partner, McKinsey &
Company (consulting), 1990-2004; Touche Ross CPA,
1985-1988
159
Treasurer, Edinburgh University
US Trust Board, since January
2023; Member, HBS
Community Action Partners
Board, since September 2022;
former Director, University of
Edinburgh Business School
(Member of US Board),
2004-2019; former Director,
Boston Public Library
Foundation, 2008-2017
Patricia M. Flynn
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1950
Trustee since 2004
Professor Emeritus of Economics and Management,
Bentley University, since 2023; Professor of
Economics and Management, Bentley University,
1976-2023; Dean, McCallum Graduate School of
Business, Bentley University, 1992-2002
161
Former Trustee, MA Taxpayers
Foundation, 1997-2022;
former Director, The MA
Business Roundtable,
2003-2019; former
Chairperson, Innovation Index
Advisory Committee, MA
Technology Collaborative,
1997-2020
Brian J. Gallagher
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1954
Trustee since 2017
Retired; Partner with Deloitte & Touche LLP and its
predecessors, 1977-2016
161
Trustee, Catholic Schools
Foundation, since 2004
Douglas A. Hacker
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1955
Trustee since 1996
Independent business executive, since May 2006;
Executive Vice President – Strategy of United Airlines,
December 2002 - May 2006; President of UAL Loyalty
Services (airline marketing company), September
2001-December 2002; Executive Vice President and
Chief Financial Officer of United Airlines, July
1999-September 2001
161
Director, SpartanNash
Company (food distributor),
since November 2013 (Chair
of the Board, since May
2021); Director, Aircastle
Limited (aircraft leasing), since
August 2006 (Chair of Audit
Committee); former Director,
Nash Finch Company (food
distributor), 2005-2013;
former Director, SeaCube
Container Leasing Ltd.
(container leasing),
2010-2013; and former
Director, Travelport Worldwide
Limited (travel information
technology), 2014-2019
Nancy T. Lukitsh
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1956
Trustee since 2011
Senior Vice President, Partner and Director of
Marketing, Wellington Management Company, LLP
(investment adviser), 1997-2010; Chair, Wellington
Management Portfolios (commingled non-U.S.
investment pools), 2007-2010; Director, Wellington
Trust Company, NA and other Wellington affiliates,
1997-2010
159
None
50
Columbia Short Term Bond Fund  | Annual Report 2024

TRUSTEES AND OFFICERS (continued)
(Unaudited)
Independent trustees (continued)
Name,
address,
year of birth
Position held
with the Columbia
Funds 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
and other relevant Board
experience
David M. Moffett
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1952
Trustee since 2011
Retired; former Chief Executive Officer of Freddie Mac
and Chief Financial Officer of U.S. Bank
161
Director, CSX Corporation
(transportation suppliers);
Director, PayPal Holdings Inc.
(payment and data processing
services); former Director,
eBay Inc. (online trading
community), 2007-2015; and
former Director, CIT Bank, CIT
Group Inc. (commercial and
consumer finance),
2010-2016; former Senior
Adviser to The Carlyle Group
(financial services), March
2008-September 2008; former
Governance Consultant to
Bridgewater Associates,
January 2013-December 2015
Catherine James Paglia
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1952
Trustee since 2004
Director, Enterprise Asset Management, Inc. (private
real estate and asset management company), since
September 1998; Managing Director and Partner,
Interlaken Capital, Inc., 1989-1997; Vice President,
1982-1985, Principal, 1985-1987, Managing
Director, 1987-1989, Morgan Stanley; Vice President,
Investment Banking, 1980-1982, Associate,
Investment Banking, 1976-1980, Dean Witter
Reynolds, Inc.
161
Director, Valmont Industries,
Inc. (irrigation systems
manufacturer), since 2012;
Trustee, Carleton College (on
the Investment Committee),
since 1987; Trustee, Carnegie
Endowment for International
Peace (on the Investment
Committee), since 2009
Natalie A. Trunow
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1967
Trustee since 2020
Chief Executive Officer, Millennial Portfolio
Solutions LLC (asset management and consulting
services), January 2016-January 2021; Non-executive
Member of the Investment Committee and Valuation
Committee, Sarona Asset Management Inc. (private
equity firm) since September 2019; Advisor, Horizon
Investments (asset management and consulting
services), August 2018-January 2022; Advisor,
Paradigm Asset Management, November
2016-January 2022; Consultant to Independent
Trustees of CFVIT and CFST I from September 2016 to
June 2020 with respect to CFVIT and to December
2020 with respect to CFST I; Director of
Investments/Consultant, Casey Family Programs, April
2016-November 2016; Senior Vice President and
Chief Investment Officer, Calvert Investments, August
2008-January 2016; Section Head and Portfolio
Manager, General Motors Asset Management, June
1997-August 2008
159
Independent Director,
Investment Committee, Health
Services for Children with
Special Needs, Inc.,
2010-2021; Independent
Director, (Executive Committee
and Chair, Audit Committee),
Consumer Credit Counseling
Services (formerly Guidewell
Financial Solutions), since
2016; Independent Director,
(Investment Committee),
Sarona Asset Management,
since 2019
Sandra L. Yeager
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1964
Trustee since 2017
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
161
Former Director, NAPE
(National Alliance for
Partnerships in Equity)
Education Foundation, October
2016-October 2020; Advisory
Board, Jennersville YMCA, June
2022-June 2023
Columbia Short Term Bond Fund  | Annual Report 2024
51

TRUSTEES AND OFFICERS (continued)
(Unaudited)
Independent trustees (continued)
Interested trustee affiliated with Investment Manager**
Name,
address,
year of birth
Position held with
the Columbia
Funds 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 and
other relevant Board
experience
Daniel J. Beckman
c/o Columbia Management
Investment Advisers, LLC
290 Congress Street
Boston, MA 02210
1962
Trustee since
November 2021 and
President since June
2021
President and Principal Executive Officer of the
Columbia Funds, since June 2021; Vice President,
Columbia Management Investment Advisers, LLC,
since April 2015; formerly, Vice President – Head of
North America Product, Columbia Management
Investment Advisers, LLC, April 2015 – December
2023; President and Principal Executive Officer,
Columbia Acorn/Wanger Funds, since July 2021
161
Director, Ameriprise
Trust Company, since October
2016; Director, Columbia
Management Investment
Distributors, Inc., since
November 2018; Board of
Governors, Columbia Wanger
Asset Management, LLC, since
January 2022
*
The term “Columbia Funds Complex” as used herein includes Columbia Seligman Premium Technology Growth Fund, Tri-Continental Corporation and each series of Columbia Funds Series Trust (CFST), Columbia Funds Series Trust I (CFST I), Columbia Funds Series Trust II (CFST II), Columbia ETF Trust I (CET I), Columbia ETF Trust II (CET II), Columbia Funds Variable Insurance Trust (CFVIT) and Columbia Funds Variable Series Trust II (CFVST II). Messrs. Batejan, Beckman, Gallagher, Hacker and Moffett and Mses. Blatz, Carlton, Carrig, Flynn, Paglia, and Yeager serve as directors of Columbia Seligman Premium Technology Growth Fund and Tri-Continental Corporation.
**
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 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. Beckman, who is President and Principal Executive Officer, 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
Michael G. Clarke
290 Congress Street
Boston, MA 02210
1969
Chief Financial Officer and
Principal Financial Officer
(2009); Senior Vice President
(2019); Treasurer and Chief
Accounting Officer (Principal
Accounting Officer) (2024) for
CFST, CFST I, CFST II, CFVIT
and CFVST II
Senior Vice President and North America Head of Operations & Investor Services, Columbia Management
Investment Advisers, LLC, since June 2023 (previously Senior Vice President and Head of Global
Operations, March 2022 – June 2023, Vice President, Head of North America Operations, and Co-Head of
Global Operations, June 2019 - February 2022 and Vice President – Accounting and Tax, May 2010 -
May 2019); senior officer of Columbia Funds and affiliated funds, since 2002. Director, Ameriprise Trust
Company, since June 2023.
52
Columbia Short Term Bond Fund  | Annual Report 2024

TRUSTEES AND OFFICERS (continued)
(Unaudited)
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
Marybeth Pilat
290 Congress Street
Boston, MA 02210
1968
Treasurer and Chief
Accounting Officer (Principal
Accounting Officer) and
Principal Financial Officer
(2020) for CET I and CET II;
Assistant Treasurer, CFST,
CFST I, CFST II, CFVIT and
CFVST II
Vice President – Product Pricing and Administration, Columbia Management Investment Advisers, LLC,
since May 2017.
William F. Truscott
290 Congress Street
Boston, MA 02210
1960
Senior Vice President (2001)
Formerly, Trustee/Director of Columbia Funds Complex or legacy funds, November 2001 - January 1,
2021; 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, TAM UK International Holdings Limited, since July 2021; formerly
Chairman of the Board and Director, Threadneedle Asset Management Holdings, Sàrl, March 2013 –
December 2022 and December 2008 – December 2022, respectively; senior executive of various entities
affiliated with Columbia Threadneedle Investments.
Christopher O. Petersen
5228 Ameriprise Financial Center
Minneapolis, MN 55474
1970
Senior Vice President and
Assistant Secretary (2021)
Formerly, Trustee/Director of funds within the Columbia Funds Complex, July 1, 2020 - November 22,
2021; Senior Vice President and Assistant General Counsel, Ameriprise Financial, Inc., since September
2021 (previously Vice President and Lead Chief Counsel, January 2015 - September 2021); formerly,
President and Principal Executive Officer of the Columbia Funds, 2015 - 2021; officer of Columbia Funds
and affiliated funds, since 2007.
Thomas P. McGuire
290 Congress Street
Boston, MA 02210
1972
Senior Vice President and
Chief Compliance Officer
(2012)
Vice President – Asset Management Compliance, Ameriprise Financial, Inc., since May 2010; Chief
Compliance Officer, Columbia Acorn/Wanger Funds, since December 2015; formerly, Chief Compliance
Officer, Ameriprise Certificate Company, September 2010 – September 2020.
Ryan C. Larrenaga
290 Congress Street
Boston, MA 02210
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); Chief Legal Officer, Columbia Acorn/Wanger Funds,
since September 2020; officer of Columbia Funds and affiliated funds, since 2005.
Michael E. DeFao
290 Congress Street
Boston, MA 02210
1968
Vice President (2011) and
Assistant Secretary (2010)
Vice President and Chief Counsel, Ameriprise Financial, Inc., since May 2010; Vice President, Chief Legal
Officer and Assistant Secretary, Columbia Management Investment Advisers, LLC, since October 2021
(previously Vice President and Assistant Secretary, May 2010 – September 2021).
Lyn Kephart-Strong
5903 Ameriprise Financial Center
Minneapolis, MN 55474
1960
Vice President (2015)
Vice President, Global Investment Operations Services, Columbia Management Investment Advisers, LLC,
since 2010; President, Columbia Management Investment Services Corp., since October 2014; President,
Ameriprise Trust Company, since January 2017.
Columbia Short Term Bond Fund  | Annual Report 2024
53

Liquidity Risk Management Program
(Unaudited)
Pursuant to Rule 22e-4 under the 1940 Act, the Fund has adopted a liquidity risk management program (Program). The Program’s principal objectives include assessing, managing and periodically reviewing the Fund’s liquidity risk. Liquidity risk is defined as the risk that the Fund could not meet redemption requests without significant dilution of remaining investors’ interests in the Fund.
The Board has appointed the Investment Manager as the program administrator for the Fund’s Program. The Investment Manager has delegated oversight of the Program to its Liquidity Risk Management Committee (the Committee). At a board meeting during the fiscal period, the Committee provided the Board with a report addressing the operations of the program and assessing its adequacy and effectiveness of implementation for the period January 1, 2023, through December 31, 2023, including:

the Fund had sufficient liquidity to both meet redemptions and operate effectively on behalf of shareholders;

there were no material changes to the Program during the period;

the implementation of the Program was effective to manage the Fund’s liquidity risk; and

the Program operated adequately during the period.
There can be no assurance that the Program will achieve its objectives in the future. Please refer to the Fund’s prospectus for more information regarding the Fund’s exposure to liquidity risk and other principal risks to which an investment in the Fund may be subject.
54
Columbia Short Term Bond Fund  | Annual Report 2024

[THIS PAGE INTENTIONALLY LEFT BLANK]

Columbia Short Term Bond 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.
© 2024 Columbia Management Investment Advisers, LLC.
columbiathreadneedleus.com/investor/
ANN222_03_P01_(05/24)


Item 2. Code of Ethics. 

  

The registrant has adopted a code of ethics (the “Code”) 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. During the period covered by this report, there were not any amendments to a provision of the Code that relates to any element of the code of ethics definition enumerated in paragraph (b) of Item 2 of Form N-CSR. During the period covered by this report, there were no waivers, including any implicit waivers, from a provision of the Code that relates to one or more of the items set forth in paragraph (b) of Item 2 of Form N-CSR.  A copy of the Code is attached hereto. 

  

Item 3. Audit Committee Financial Expert. 

  

The registrant’s Board of Trustees has determined that David M. Moffett, Brian J. Gallagher, J. Kevin Connaughton, Sandra L. Yeager, and Douglas A. Hacker, each of whom are members of the registrant’s Board of Trustees and Audit Committee, each qualify as an audit committee financial expert.  Mr. Moffett, Mr. Gallagher, Mr. Connaughton, Ms. Yeager, and Mr. Hacker 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 series of the relevant registrant whose reports to shareholders 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 March 31, 2024 and March 31, 2023 are approximately as follows: 

  

2024 

2023 

$41,500 

$40,300 

  

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 March 31, 2024 and March 31, 2023 are approximately as follows: 

  

2024 

2023 

$0 

$0 

  

 

Audit-Related Fees, if any, 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 March 31, 2024 and March 31, 2023, 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 March 31, 2024 and March 31, 2023 are approximately as follows: 

  

2024 

2023 

$12,900 

$13,200 

  

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.  

  

During the fiscal years ended March 31, 2024 and March 31, 2023, 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 March 31, 2024 and March 31, 2023 are approximately as follows: 

  

2024 

2023 

$0    

$0 

  

All Other Fees, if any, 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 March 31, 2024 and March 31, 2023 are approximately as follows: 

  

2024 

2023 

$570,000    

$557,000 

  

In fiscal years 2024 and 2023, 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) None, or 0%, of the Audit-Related Fees, Tax Fees and All Other Fees paid by the Fund or affiliated entities relating directly to the operations and financial reporting of the Registrant disclosed above were approved by the audit committee pursuant to paragraphs (c)(7)(i)(C) of Rule 2-01 of Regulation S-X (which permits audit committee approval after the start of the engagement with respect to services other than audit, review or attest services, if certain conditions are satisfied). 

  

(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 March 31, 2024 and March 31, 2023 are approximately as follows:   

  

2024 

2023 

$582,900 

$570,200 

  

(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. 

  

(i) Not applicable. 

  

(j) Not applicable. 

  

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. 

  

(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/ Daniel J. Beckman 

  

Daniel J. Beckman, President and Principal Executive Officer 

  

  

Date 

May 23, 2024 

  

  

  

  

  

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/ Daniel J. Beckman 

  

Daniel J. Beckman, President and Principal Executive Officer 

  

  

Date 

May 23, 2024 

  

By (Signature and Title) 

  /s/ Michael G. Clarke 

  

Michael G. Clarke, Chief Financial Officer,  

  

Treasurer, Chief Accounting Officer, 

Principal Financial Officer and Senior Vice President 

  

  

Date  

May 23, 2024 

  

  

  

  

  

  

  

  

  

  

  

  

  


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

COLUMBIA FUNDS

WANGER ADVISORS TRUST / COLUMBIA ACORN TRUST

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

September 2023

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 Boards (the Board of the Columbia Funds ("Columbia Board") and the Boards of the Columbia Acorn Trust ("CAT") and the Wanger Advisors Trust ("WAT") (collectively, "Columbia Acorn Board" and together with the Columbia Board, the "Boards") have adopted the following Code of Ethics for Principle Executive and Senior Financial Officers (the "Code"), which sets forth the ethical standards to which the Funds holds their 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 Boards have 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;

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

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;

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 Boards have 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 Boards have 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 (Columbia Management Investment Advisers, LLC

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

("CMIA") for the Columbia Funds and Columbia Wanger Asset Management, LLC ("CWAM") for the WAT / CAT Funds), 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 employ ees. 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 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 Boards of the Funds 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 Funds 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 Funds. 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 Co vered 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 a ffiliations 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

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

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.

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 ge nerally 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 regulation s.

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 Boa rd 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

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.

Proprietary and Confidential

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

Primary Service Providers as set 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 rec ords 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 aff iliates, and outside audit firms, legal counsel to the Fund and legal counsel to the Indep endent 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.

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.

Proprietary and Confidential

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

Monitoring/Oversight/Escalation

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.

Proprietary and Confidential

Page 7 of 9

Appendix A

INITIAL ACKNOWLEDGEMENT

Iacknowledge 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 Ind ependent 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

Iacknowledge 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, Daniel J. Beckman, 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: May 23, 2024

/s/ Daniel J. Beckman

 

 

Daniel J. Beckman, 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: May 23, 2024

 

/s/ Michael G. Clarke

 

 

 

Michael G. Clarke, Chief Financial Officer,

 

Treasurer, Chief Accounting Officer, Principal

 

Financial Officer and Senior Vice President


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 March 31, 2024 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: May 23, 2024   

/s/ Daniel J. Beckman 

  

Daniel J. Beckman, President and Principal Executive Officer 

  

Date: May 23, 2024   

  /s/ Michael G. Clarke 

  

Michael G. Clarke, Chief Financial Officer,  

  

Treasurer, Chief Accounting Officer, 

Principal Financial Officer and Senior Vice President 

  

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.