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UNITED STATES

SECURITIES AND EXCHANGE COMMISSION

Washington, DC 20549

FORM 10-K

☒			ANNUAL REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934,

for the Fiscal Year Ended December 31, 2020,

or

☐			TRANSITION REPORT PURSUANT TO SECTION 13 OR 15(d) OF THE SECURITIES EXCHANGE ACT OF 1934,

for the transition period from           N/A           to                                 .

Commission File Number: 0-23695

Securities registered pursuant to Section 12(b) of the Act:

Title of Each Class			Trading Symbol(s)			Name of Each Exchange on Which Registered
Common Stock, par value of $0.01 per share			BRKL			Nasdaq Global Select Market

Securities registered pursuant to Section 12 (g) of the Act: None

Indicate by check mark if the registrant is a well-known seasoned issuer, as defined in Rule 405 of the Securities Act of 1934. Yes ☐    No ☒

Indicate by check mark if the registrant is not required to file reports pursuant to Section 13 or 15(d) of the Securities Act of 1934. Yes ☐    No ☒

Indicate by check mark whether the registrant (1) has filed all reports required to be filed by Section 13 or 15(d) of the Securities Exchange Act of 1934 during the preceding 12 months (or for such shorter period that the registrant was required to file such reports) and (2) has been subject to such filing requirement for the past 90 days. Yes ☒    No ☐

Indicate by check mark whether the registrant (1) has submitted electronically every Interactive Data File required to be submitted pursuant to Rule 405 of Regulation S-T (§232.405 of this chapter) during the preceding 12 months (or for such shorter period that the registrant was required to submit such files). Yes ☒    No ☐

Indicate by check mark whether the registrant is a large accelerated filer, an accelerated filer, a non-accelerated filer, a smaller reporting company, or emerging growth company. See the definitions of "large accelerated filer", "accelerated filer", "smaller reporting company", and "emerging growth company" in Rule 12b-2 of the Exchange Act.

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Indicate by check mark whether the registrant has filed a report on and attestation to its management’s assessment of the effectiveness of its internal control over financial reporting under Section 404(b) of the Sarbanes-Oxley Act (15 U.S.C. 7262(b)) by the registered public accounting firm that prepared or issued its audit report.                      ☒

Indicate by check mark if the registrant is a shell company (as defined in Rule 12b-2 of the Act). Yes ☐    No ☒

As of June 28, 2020, the last business day of the registrant's most recently completed second fiscal quarter, the aggregate market value of the shares of common stock held by nonaffiliates, based upon the closing price per share of the registrant's common stock as reported on NASDAQ, was approximately $0.8 billion.

As of February 26, 2021, there were 85,177,172 and 78,192,589 shares of the registrant's common stock, par value $0.01 per share, issued and outstanding, respectively.

BROOKLINE BANCORP, INC. AND SUBSIDIARIES

2020 FORM 10-K

Table of Contents

						Page
Part I
Item 1.			Business			1
Item 1A.			Risk Factors			12
Item 1B.			Unresolved Staff Comments			21
Item 2.			Properties			21
Item 3.			Legal Proceedings			22
Item 4.			Mine Safety Disclosures			22
Part II
Item 5.			Market for the Registrant's Common Equity, Related Stockholder Matters and Issuer Purchases of Equity Securities			23
Item 6.			Selected Financial Data			25
Item 7.			Management's Discussion and Analysis of Financial Condition and Results of Operations			27
Item 7A.			Quantitative and Qualitative Disclosures About Market Risk			67
Item 8.			Financial Statements and Supplementary Data			70
Item 9.			Changes In and Disagreements With Accountants on Accounting and Financial Disclosure			71
Item 9A.			Controls and Procedures			71
Item 9B.			Other Information			71
Part III
Item 10.			Directors, Executive Officers and Corporate Governance			71
Item 11.			Executive Compensation			71
Item 12.			Security Ownership of Certain Beneficial Owners and Management and Related Stockholder Matters			71
Item 13.			Certain Relationships and Related Transactions, and Director Independence			71
Item 14.			Principal Accounting Fees and Services			71
Part IV
Item 15.			Exhibits and Financial Statement Schedules			72
Item 16.			Form 10-K Summary			74
Signatures						75

FORWARD-LOOKING STATEMENTS

Certain statements contained in this Annual Report on Form 10-K that are not historical facts may constitute forward-looking statements within the meaning of Section 27A of the Securities Act of 1933, as amended, and Section 21E of the Securities Exchange Act of 1934, as amended, and are intended to be covered by the safe harbor provisions of the Private Securities Litigation Reform Act of 1995. Forward-looking statements involve risks and uncertainties. These statements, which are based on certain assumptions and describe Brookline Bancorp, Inc.'s (the "Company's") future plans, strategies and expectations, can generally be identified by the use of the words "may," "will," "should," "could," "would," "plan," "potential," "estimate," "project," "believe," "intend," "anticipate," "expect," "target" and similar expressions. These statements include, among others, statements regarding the Company's intent, belief or expectations with respect to economic conditions, trends affecting the Company's financial condition or results of operations, and the Company's exposure to market, liquidity, interest-rate and credit risk.

Forward-looking statements are based on the current assumptions underlying the statements and other information with respect to the beliefs, plans, objectives, goals, expectations, anticipations, estimates and intentions of management and the financial condition, results of operations, future performance and business are only expectations of future results. Although the Company believes that the expectations reflected in the Company’s forward-looking statements are reasonable, the Company’s actual results could differ materially from those projected in the forward-looking statements as a result of, among other factors, the negative impacts and disruptions of the COVID-19 pandemic and measures taken to contain its spread on the Company’s employees, customers, business operations, credit quality, financial position, liquidity and results of operations; continued deterioration in employment levels; turbulence in the capital and debt markets; changes in interest rates; competitive pressures from other financial institutions; the effects of weakness in general economic conditions on a national basis or in the local markets in which the Company operates; changes in consumer behavior due to changing political, business and economic conditions, including increased unemployment, or legislative or regulatory initiatives; changes in the value of securities and other assets in the Company’s investment portfolio; increases in loan and lease default and charge-off rates; the adequacy of allowances for loan and lease losses; decreases in deposit levels that necessitate increases in borrowing to fund loans and investments; operational risks including, but not limited to, cybersecurity incidents, fraud, natural disasters and future pandemics; changes in regulation; reputational risks relating to the Company’s participation in the Paycheck Protection Program (the "PPP"), and other pandemic-related legislative and regulatory initiatives and programs; the possibility that future credit losses may be higher than currently expected; due to changes in economic assumptions and adverse economic developments; the risk that goodwill and intangibles recorded in the Company’s financial statements will become impaired; and changes in assumptions used in making such forward-looking statements; and the other risks and uncertainties detailed in Item 1A, "Risk Factors." Forward-looking statements speak only as of the date on which they are made. The Company does not undertake any obligation to update any forward-looking statement to reflect circumstances or events that occur after the date the forward-looking statements are made.