NB Bancorp (NBBK) EVP granted 6,980 restricted stock award

Rhea-AI Filing Summary

NB Bancorp, Inc. executive Matthew G. Schulman, EVP and President of Needham Private Bank, reported an acquisition of 6,980 shares of common stock as a stock grant. The award was recorded at $0.00 per share, reflecting compensation rather than an open-market purchase.

The filing shows Schulman now directly holds 6,980 common shares, all from this grant. According to the footnote, these restricted shares vest in installments of 33 1/3% per year, beginning on March 9, 2027, which means the award becomes fully vested over three years.

Insider Trade Summary

1 transaction reported

Mixed 1 txn

Insider Schulman Matthew G

Role EVP, President Needham Prv Bnk

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	6,980	$0.00	--

Holdings After Transaction: Common Stock — 6,980 shares (Direct)

Footnotes (1)

1. [object Object]

Key Figures

Restricted stock grant: 6,980 shares Grant price: $0.00 per share Shares owned after grant: 6,980 shares +2 more

5 metrics

Restricted stock grant 6,980 shares Common stock award reported on March 9, 2026

Grant price $0.00 per share Recorded transaction price for the restricted stock grant

Shares owned after grant 6,980 shares Direct common stock holdings following the transaction

Vesting rate 33 1/3% per year Restricted stock vests annually starting March 9, 2027

Vesting start date March 9, 2027 First vesting date for the restricted stock award

Key Terms

restricted stock, vest, grant, award, or other acquisition, Common Stock

4 terms

restricted stock financial

"Shares of restricted stock vest at a rate of 33 1/3% per year"

Shares granted to an individual that carry limits on transfer or sale until certain conditions are met, such as staying with the company for a set time or hitting performance targets. Think of them as a locked gift that gradually opens; for investors they matter because they affect how many shares may enter the market later, signal management incentives and potential dilution, and reveal confidence in future company performance.

vest financial

"Shares of restricted stock vest at a rate of 33 1/3% per year"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

grant, award, or other acquisition financial

"transaction_code_description: Grant, award, or other acquisition"

Common Stock financial

"security_title: Common Stock"

Common stock represents ownership shares in a company, giving investors a stake in its success and a say in important decisions through voting rights. It is the most common type of stock traded on markets and can provide income through dividends, as well as potential for value growth. For investors, holding common stock means sharing in the company’s profits and risks.

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^*

Schulman Matthew G

(Last) (First) (Middle)

1063 GREAT PLAIN AVE

(Street)

NEEDHAM MASSACHUSETTS 02492

(City) (State) (Zip)

UNITED STATES

(Country)

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)
	EVP, President Needham Prv Bnk

2a. Foreign Trading Symbol

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

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

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

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

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		A		6,980(1)	A	$0	6,980	D

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. Shares of restricted stock vest at a rate of 33 1/3% per year commencing on March 9, 2027.

	/s/ Steven Lanter, pursuant to power of attorney	03/30/2026
	** 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.
* Form 4: SEC 1474 (03-26)

FAQ

What insider transaction did NB Bancorp (NBBK) executive Matthew Schulman report?

Matthew G. Schulman reported receiving a grant of 6,980 NB Bancorp common shares as compensation. The award was recorded at $0.00 per share and classified as a “grant, award, or other acquisition,” rather than an open-market purchase or sale of stock.

How many NB Bancorp (NBBK) shares does Matthew Schulman hold after this Form 4?

After the reported grant, Matthew G. Schulman directly holds 6,980 shares of NB Bancorp common stock. All of these shares come from this single restricted stock award, according to the Form 4 transaction details and the post-transaction ownership figure disclosed.

Is the NB Bancorp (NBBK) Form 4 transaction a purchase or a stock grant?

The Form 4 reports a stock grant, not a purchase. It is coded as an “A” transaction, described as a grant, award, or other acquisition, with a transaction price of $0.00 per share, indicating compensation-based restricted stock rather than an open-market buy.

What is the vesting schedule for Matthew Schulman’s NB Bancorp restricted shares?

The 6,980 restricted NB Bancorp shares vest in three equal annual installments. The footnote states they vest at 33 1/3% per year starting on March 9, 2027, so the award becomes fully vested over a three-year period following that commencement date.

Does the NB Bancorp (NBBK) Form 4 show any stock sales by Matthew Schulman?

The Form 4 does not show any stock sales by Matthew G. Schulman. It reports only one transaction: an acquisition of 6,980 restricted common shares through a compensation grant, with no corresponding dispositions or derivative exercises listed in the filing data.