Donald Michael Westermann - 01 Mar 2026 Form 4 Insider Report for Eastern Bankshares, Inc. (EBC)

Role
Chief Information Officer
Signature
/s/ Kathleen R. Henry, by Power of Attorney
Issuer symbol
EBC
Transactions as of
01 Mar 2026
Net transactions value
-$175,473
Form type
4
Filing time
03 Mar 2026, 16:37:03 UTC
Previous filing
29 Jan 2026
Next filing
05 Mar 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Westermann Donald Michael Chief Information Officer 125 HIGH STREET, BOSTON /s/ Kathleen R. Henry, by Power of Attorney 03 Mar 2026 0001825585

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction EBC Common Stock Options Exercise $0 +14,359 +69% $0.000000 35,219 01 Mar 2026 Direct F1
transaction EBC Common Stock Tax liability $127,570 -6,522 -19% $19.56 28,697 01 Mar 2026 Direct
transaction EBC Common Stock Award $0 +5,520 +19% $0.000000 34,217 01 Mar 2026 Direct F9
transaction EBC Common Stock Tax liability $47,902 -2,449 -7.2% $19.56 31,768 01 Mar 2026 Direct
holding EBC Common Stock 22,682 01 Mar 2026 By 401(k) F2
holding EBC Common Stock 4,921 01 Mar 2026 By ESOP F2

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Underlying Class Amount Exercise Price Ownership Footnotes
transaction EBC Restricted Stock Units Options Exercise $0 -9,488 -50% $0.000000 9,488 01 Mar 2026 Common stock 9,488 Direct F1, F4
transaction EBC Restricted Stock Units Options Exercise $0 -1,977 -100% $0.000000 0 01 Mar 2026 Common stock 1,977 Direct F1, F5
transaction EBC Restricted Stock Units Options Exercise $0 -2,894 -50% $0.000000 2,895 01 Mar 2026 Common stock 2,894 Direct F1, F6
transaction EBC Restricted Stock Units Award $0 +7,099 $0.000000 7,099 02 Mar 2026 Common stock 7,099 Direct F3, F8
holding EBC Restricted Stock Units 34,697 01 Mar 2026 Common stock 34,697 Direct F1, F7
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Restricted stock units convert into common stock on a one-for-one basis.
F2 Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report.
F3 Each restricted stock unit represents a contingent right to receive one share of EBC common stock on the applicable vesting date.
F4 On March 1, 2022, the reporting person was granted 47,438 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.
F5 On March 1, 2023, the reporting person was granted 5,930 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.
F6 On March 1, 2024, the reporting person was granted 8,683 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.
F7 On March 3, 2025, the reporting person was granted 34,697 restricted stock units of which 6,497 vest in three equal annual installments beginning March 3, 2026 and 28,200 vest after 3 years, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F8 On March 2, 2026, the reporting person was granted 7,099 restricted stock units that vest in three equal annual installments beginning March 2, 2027, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F9 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 the Company's performance on total shareholder return ("TSR") measured at the end of the three-year performance period of January 1, 2023 through December 31, 2025 (the "Performance Period") relative to TSR performance over that performance period of the banks listed on the KBW Nasdaq Regional Banking Index (the "TSR Measure"). The Compensation and Human Capital Management Committee determined that the Company's performance of the TSR Measure resulted in a payout of 93.1% of target.