[Form 4] Eastern Bankshares, Inc. Insider Trading Activity

Rhea-AI Filing Summary

Eastern Bankshares, Inc. (EBC) reported an insider transaction by a director involving the exercise of stock options and acquisition of common shares. On 11/25/2025, the director exercised a stock option (transaction code M) to acquire 13,696 shares of Eastern common stock at a price of $13.38 per share. Following this transaction, the director beneficially owned 78,323 shares directly and 707 shares indirectly through Double Eagle LLC, as well as 50,000 derivative securities (stock options) remaining.

The filing explains that, under the merger agreement dated April 24, 2025 between Eastern and HarborOne Bancorp, Inc., the reported stock option, which became exercisable in connection with the merger effective 11/01/2025, must be exercised no later than 05/01/2026, six months after the reporting person’s service as a HarborOne director ended.

Insider Trade Summary

13,696 shares exercised/converted

Mixed 4 txns

Insider Sullivan Michael James

Role Director

Type	Security	Shares	Price	Value
Exercise	Stock Option (Right to Buy)	13,696	$0.00	--
Exercise	Common Stock	13,696	$13.38	$183K
holding	Common Stock	--	--	--
holding	Common Stock	--	--	--

Holdings After Transaction: Stock Option (Right to Buy) — 50,000 shares (Direct); Common Stock — 13,696 shares (Direct); Common Stock — 707 shares (Indirect, Held By Double Eagle LLC)

Footnotes (1)

1. [object Object]

Form 4 Insider Transactions: What Each Field Means →

SEC Form 4

FORM 4

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
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Sullivan Michael James

(Last) (First) (Middle)

125 HIGH STREET

(Street)

BOSTON MA 02110

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
Eastern Bankshares, Inc. [ EBC ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
11/25/2025

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	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	11/25/2025		M		13,696	A	$13.38	13,696	D
Common Stock								78,323	D
Common Stock								707	I	Held By Double Eagle LLC

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 (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	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 (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (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: 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
Stock Option (Right to Buy)	$13.38	11/25/2025		M			13,696	11/01/2025	(1)	Common Stock	63,696	$0	50,000	D

Explanation of Responses:

1. Pursuant to the terms of the Agreement and Plan of Merger dated April 24, 2025 among Eastern Bankshares, Inc. ("Eastern"), Eastern Bank, HarborOne Bancorp, Inc. ("HarborOne"), and HarborOne Bank, upon the merger of HarborOne into Eastern, effective November 1, 2025, the stock option must be exercised no later than May 1, 2026 (i.e., six (6) months from the time reporting person's employment as a director of HarborOne was terminated).

	/s/ Kathleen R. Henry, by Power of Attorney	11/25/2025
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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