Sec Form 4 Filing - Miller Quincy Lee @ Eastern Bankshares, Inc. - 2025-03-03

FORM 4 Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549 STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934, Section 17(a) of the Public Utility Holding Company Act of 1935 or Section 30(h) of the Investment Company Act of 1940

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1. Name and Address of Reporting Person Miller Quincy Lee 2. Issuer Name and Ticker or Trading Symbol Eastern Bankshares, Inc. [ EBC] 5. Relationship of Reporting Person(s) to Issuer (Check all applicable) _____ Director _____ 10% Owner X __ Officer (give title below) _____ Other (specify below) See Remarks (Last) (First) (Middle) 125 HIGH STREET 3. Date of Earliest Transaction (MM/DD/YY) 03/03/2025 (Street) BOSTON, MA02110 4. If Amendment, Date Original Filed (MM/DD/YY) 6. Individual or Joint/Group Filing (Check Applicable Line) __ X __ Form filed by One Reporting Person _____ Form filed by More than One Reporting Person (City) (State) (Zip)

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned 1.Title of Security (Instr. 3) 2. Transaction Date (MM/DD/YY) 2A. Deemed Execution Date, if any (MM/DD/YY) 3. Transaction Code (Instr. 8) 4. Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5) 5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4) 6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4) 7. Nature of Indirect Beneficial Ownership (Instr. 4) Code V Amount (A) or (D) Price Common Stock 03/03/2025 M 25,067 ( 1 ) A $ 0 25,067 D Common Stock 03/03/2025 F 11,119 D $ 17.73 13,948 D Common Stock 03/03/2025 A 53,367 ( 8 ) ( 9 ) A $ 0 67,315 D Common Stock 03/03/2025 F 23,686 D $ 17.73 43,629 D Common Stock 83,240 I By IRA Common Stock 1,280 I By Spouse in IRA Common Stock 3,912 I ( 2 ) By ESOP

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned ( e.g. , puts, calls, warrants, options, convertible securities) 1. Title of Derivative Security (Instr. 3) 2. Conversion or Exercise Price of Derivative Security 3. Transaction Date (MM/DD/YY) 3A. Deemed Execution Date, if any (MM/DD/YY) 4. Transaction Code (Instr. 8) 5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4, and 5) 6. Date Exercisable and Expiration Date (MM/DD/YY) 7. Title and Amount of Underlying Securities (Instr. 3 and 4) 8. Price of Derivative Security (Instr. 5) 9. Number of Derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4) 10. Ownership Form of Derivative Security: Direct (D) or Indirect (I) (Instr. 4) 11. Nature of Indirect Beneficial Ownership (Instr. 4) Code V (A) (D) Date Exercisable Expiration Date Title Amount or Number of Shares Restricted Stock Units ( 1 ) 03/03/2025 M 14,231 ( 4 ) ( 4 ) Common stock 14,231 $ 0 28,464 D Restricted Stock Units ( 1 ) 03/03/2025 M 3,775 ( 5 ) ( 5 ) Common stock 3,775 $ 0 3,775 D Restricted Stock Units ( 1 ) 03/03/2025 M 7,061 ( 6 ) ( 6 ) Common stock 7,061 $ 0 14,125 D Restricted Stock Units ( 3 ) 03/03/2025 A 16,864 ( 7 ) ( 7 ) Common stock 16,864 $ 0 16,864 D

Reporting Owners Reporting Owner Name / Address Relationships Director 10% Owner Officer Other Miller Quincy Lee 125 HIGH STREET BOSTON, MA02110 See Remarks Signatures /s/ Kathleen R. Henry, by Power of Attorney 03/05/2025 Signature of Reporting Person Date

Explanation of Responses:

( 1 )Restricted stock units convert into common stock on a one-for-one basis. ( 2 )Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report. ( 3 )Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date. ( 4 )On March 1, 2022, the reporting person was granted 71,157 restricted stock units that vest in five equal annual installments beginning March 1, 2023, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date. ( 5 )On March 1, 2023, the reporting person was granted 11,324 restricted stock units that vest in three equal annual installments beginning March 1, 2024, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date. ( 6 )On March 1, 2024, the reporting person was granted 21,186 restricted stock units that vest in three equal annual installments beginning March 1, 2025, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date. ( 7 )On March 3, 2025, the reporting person was granted 16,864 restricted stock units that vest in three equal annual installments beginning March 1, 2026, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date. ( 8 )Represents shares of Eastern Bankshares, Inc. (the "Company") common stock, par value $0.01 per share ("Common Stock") received upon vesting of a performance restricted stock unit ("PRSU") award eligible to vest based upon both (i) the Company's performance measured at the end of the three-year performance period of January 1, 2022 through December 31, 2024 (the "Performance Period") relative to the KBW Nasdaq Regional Banking Index with respect to growth in earnings per share ("EPS Measure"), and (ii) the Company's performance measured at the end of the Performance Period relative to the KBW Nasdaq Regional Banking Index with respect to total shareholder return ("TSR Measure"). Based on the Company's three year performance on the TSR Measure and EPS Measure respectively, as measured at the end of the Performance Period, the Compensation Committee determined that (i) performance under the TSR Measure did not meet the minimum threshold, ( 9 )(Continued from footnote 8) resulting in no award of shares for this metric, and (ii) performance under the EPS Measure met the maximum payout threshold of 150% of target.

Remarks: President and Chief Operating Officer

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