Robert Francis Rivers - 03 Mar 2026 Form 4 Insider Report for Eastern Bankshares, Inc. (EBC)

Role: Executive Chair, Director
Signature: /s/ Kathleen R. Henry, by Power of Attorney
Issuer symbol: EBC
Transactions as of: 03 Mar 2026
Net transactions value: $0
Form type: 4
Filing time: 05 Mar 2026, 17:49:39 UTC
Previous filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Rivers Robert Francis	Executive Chair, Director	125 HIGH STREET, BOSTON	/s/ Kathleen R. Henry, by Power of Attorney	05 Mar 2026	0001825654

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	EBC	Common Stock	Options Exercise		+11,223	+2.5%	$0.000000^*	463,709	03 Mar 2026	Direct	F1
transaction	EBC	Common Stock	Tax liability		-5,427	-1.2%	$19.45^*	458,282	03 Mar 2026	Direct	F2
holding	EBC	Common Stock						4,921	03 Mar 2026	By ESOP	F3

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		-11,223	-33%	$0.000000^*	22,448	03 Mar 2026	Common stock	11,223		Direct	F1, F6
holding	EBC	Restricted Stock Units						21,348	03 Mar 2026	Common stock	21,348		Direct	F1, F4
holding	EBC	Restricted Stock Units						15,535	03 Mar 2026	Common stock	15,535		Direct	F1, F5
holding	EBC	Restricted Stock Units						33,301	03 Mar 2026	Common stock	33,301		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	Includes 200,000 shares held in joint tenancy with spouse.
F3	Reflects the amount of shares beneficially owned, including shares received due to automatic dividend reinvestment, as of the date of this report.
F4	On March 1, 2022, the reporting person was granted 106,736 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, 2024, the reporting person was granted 46,604 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.
F6	On March 3, 2025, the reporting person was granted 33,671 restricted stock units that vest in three equal annual installments beginning March 3, 2026, after market close, subject to continued service. Vested shares will be issued to the reporting person as soon as practicable after the vesting date.
F7	On March 2, 2026, the reporting person was granted 33,301 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.