[Form 4] Brookline Bancorp Inc Insider Trading Activity

Rhea-AI Filing Summary

Brookline Bancorp (BRKL) Form 4 filing – 5 Aug 2025

Chief Credit Officer Mark J. Meiklejohn reported several Code F transactions on 2 Aug 2025, indicating shares were withheld by the company to satisfy tax obligations triggered by the vesting of performance-based restricted stock granted under the 2021 Stock Option and Incentive Plan. Four separate withholdings totaled 4,721 common shares at an average reference price of $10.28, or roughly $48 k in value. After these non-open-market dispositions he directly owns 111,942 common shares and indirectly holds 1,623 shares via the ESOP, for total beneficial ownership of 113,565 shares.

No derivative security activity was reported, and the filing shows no purchases or open-market sales. Because Code F transactions are administrative and do not reflect discretionary trading, the event is generally considered neutral from a market-signal perspective.

Insights

Securities Analyst

TL;DR: Routine tax-withholding; neutral for BRKL fundamentals.

The Form 4 discloses automatic share withholding tied to the vesting of performance-based restricted stock. Roughly $48 k worth of shares (0.03 % of BRKL’s 3-Jun-2025 shares outstanding) were withheld, leaving the officer with 113.6 k shares. Because Code F does not involve an elective sale or purchase, it neither strengthens nor weakens insider sentiment. No new options, no open-market trading, and no change to incentive structure were reported. Hence, the filing is informational only and not expected to move the stock.

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^*

Meiklejohn Mark J.

(Last) (First) (Middle)

131 CLARENDON STREET

(Street)

BOSTON MA 02116

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
BROOKLINE BANCORP INC [ BRKL ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
08/02/2025

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	08/02/2025		F		1,869(1)	D	$10.28	114,794	D
Common	08/02/2025		F		623	D	$10.28	114,171	D
Common	08/02/2025		F		1,059	D	$10.28	113,112	D
Common	08/02/2025		F		1,170	D	$10.28	111,942(2)	D
Common								1,623	I	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 (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

Explanation of Responses:

1. Performance based restricted stock shares granted pursuant to the Brookline Bancorp, Inc. 2021 Stock Option and Incentive Plan. The shares vest on the third anniversary of the date of grant based on certain performance based metrics.

2. Includes shares of restricted stock granted pursuant to the Brookline Bancorp, Inc. 2021 Stock Option and Incentive Plan.

Remarks:

	Mark J. Meiklejohn, by Marissa S. Martin, P.O.A.	08/05/2025
	** 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).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.

FAQ

How many BRKL shares were withheld in the 2 Aug 2025 tax transaction?

4,721 common shares were withheld to cover tax obligations upon vesting.

What price was used for the withheld Brookline Bancorp shares?

The reference price disclosed for each line item was $10.28 per share.

How many Brookline Bancorp shares does Mark J. Meiklejohn now own?

He directly owns 111,942 shares and indirectly holds 1,623 via ESOP.

What does transaction code "F" mean on a Form 4 filing?

Code F indicates shares were withheld by the issuer to pay taxes related to equity award vesting.

Does this Form 4 suggest bullish or bearish insider sentiment for BRKL?

Because the shares were withheld for taxes (not sold on the market), the filing is considered neutral.