NB Bancorp (NBBK) CFO adds 1,000 shares in open-market stock purchase

Rhea-AI Filing Summary

NB Bancorp, Inc. Senior Executive Vice President and CFO Jean-Pierre Lapointe reported an open-market purchase of 1,000 shares of common stock at $20.42 per share. Following this transaction, he directly owns 110,331 shares, and also has indirect holdings through a 401(k) plan and an ESOP. Footnotes note that part of his holdings are restricted stock that vest over several years.

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

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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^*

Lapointe Jean-Pierre

(Last) (First) (Middle)

1063 GREAT PLAIN AVE

(Street)

NEEDHAM MA 02492

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
NB Bancorp, Inc. [ NBBK ]

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

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

3. Date of Earliest Transaction (Month/Day/Year)
03/09/2026

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	03/09/2026		P		1,000	A	$20.42	110,331(1)(2)	D
Common Stock								4,018	I	By 401(k)
Common Stock								1,779	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. Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026.

2. Includes shares of restricted stock which vest at a rate of 33 1/3% per year commencing on February 25, 2027.

	/s/ Steven Lanter, pursuant to power of attorney	03/09/2026
	** 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

What insider transaction did NB Bancorp (NBBK) report for Jean-Pierre Lapointe?

NB Bancorp reported that SEVP and CFO Jean-Pierre Lapointe bought 1,000 shares of common stock in an open-market purchase at $20.42 per share, increasing his directly held stake in the company.

How many NB Bancorp (NBBK) shares does Jean-Pierre Lapointe own after this Form 4?

After the reported transaction, Jean-Pierre Lapointe directly owns 110,331 shares of NB Bancorp common stock. He also has additional indirect holdings through a 401(k) plan and an ESOP, as disclosed in the Form 4.

What was the purchase price in Jean-Pierre Lapointe’s NB Bancorp (NBBK) Form 4 trade?

Jean-Pierre Lapointe purchased 1,000 shares of NB Bancorp common stock at a price of $20.42 per share. The filing describes this as an open-market purchase transaction coded as a standard “P” acquisition.

Does Jean-Pierre Lapointe hold NB Bancorp (NBBK) shares indirectly?

Yes. In addition to directly held shares, the Form 4 shows indirect ownership of NB Bancorp common stock through a 401(k) plan and an employee stock ownership plan (ESOP), each reported separately as indirect holdings.

What do the restricted stock footnotes in the NB Bancorp (NBBK) Form 4 indicate?

The footnotes state that Lapointe’s holdings include restricted stock awards. Some vest 20% per year starting April 24, 2026, and others vest 33 1/3% per year starting February 25, 2027, adding time-based conditions to part of his ownership.