Quincy Lee Miller - 01 Mar 2026 Form 4 Insider Report for Eastern Bankshares, Inc. (EBC)

Role: President
Signature: /s/ Kathleen R. Henry, by Power of Attorney
Issuer symbol: EBC
Transactions as of: 01 Mar 2026
Net transactions value: -$309,635
Form type: 4
Filing time: 03 Mar 2026, 17:55:28 UTC
Previous filing: 29 Aug 2025
Next filing: 05 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Miller Quincy Lee	President	125 HIGH STREET, BOSTON	/s/ Kathleen R. Henry, by Power of Attorney	03 Mar 2026	0001825603

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EBC	Common Stock	Options Exercise	$0	+25,069	+57%	$0.000000	68,698	01 Mar 2026	Direct	F1
transaction	EBC	Common Stock	Tax liability	$218,172	-11,154	-16%	$19.56	57,544	01 Mar 2026	Direct
transaction	EBC	Common Stock	Award	$0	-10,542	-13%	$0.000000	68,086	01 Mar 2026	Direct	F9
transaction	EBC	Common Stock	Tax liability	$91,463	-4,676	-6.9%	$19.56	63,410	01 Mar 2026	Direct
holding	EBC	Common Stock						13,900	01 Mar 2026	By 401(k)
holding	EBC	Common Stock						83,240	01 Mar 2026	By IRA
holding	EBC	Common Stock						1,280	01 Mar 2026	By Spouse in IRA
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	-14,232	-50%	$0.000000	14,232	01 Mar 2026	Common stock	14,232		Direct	F1, F4
transaction	EBC	Restricted Stock Units	Options Exercise	$0	-3,775	-100%	$0.000000	0	01 Mar 2026	Common stock	3,775		Direct	F1, F5
transaction	EBC	Restricted Stock Units	Options Exercise	$0	-7,062	-50%	$0.000000	7,063	01 Mar 2026	Common stock	7,062		Direct	F1, F6
transaction	EBC	Restricted Stock Units	Award	$0	+15,162		$0.000000	15,162	02 Mar 2026	Common stock	15,162		Direct	F3, F8
holding	EBC	Restricted Stock Units						16,864	01 Mar 2026	Common stock	16,864		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 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.
F5	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.
F6	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.
F7	On March 3, 2025, the reporting person was granted 16,864 restricted stock units that vest in three equal annual installments beginning March 3, 2026, 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 15,162 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.