What was the reported price per share for the NB Bancorp (NBBK) stock acquired?

The 2,402 NB Bancorp common shares were reported as acquired at a price of $0 per share, consistent with a restricted stock award.

NB Bancorp director acquires 2,402 restricted shares

Q: Who reported a transaction in NB Bancorp (NBBK) in this Form 4?

The reporting person is Joseph R. Nolan Jr., who is identified as a director of NB Bancorp, Inc.

Q: What type of NB Bancorp (NBBK) security was involved in the transaction?

The transaction involved common stock of NB Bancorp, Inc., reported as a non-derivative security.

Q: How many NB Bancorp (NBBK) shares did the director acquire and on what date?

On January 2, 2026, the director acquired 2,402 shares of NB Bancorp common stock in a single reported transaction.

Q: When do the newly acquired restricted NB Bancorp (NBBK) shares vest?

According to the filing, these shares of restricted stock vest 100% on January 2, 2027.

Q: What other restricted NB Bancorp (NBBK) shares are included in the director’s holdings?

The total beneficial ownership includes shares of restricted stock that vest at a rate of 20% per year commencing on April 24, 2026.

NB Bancorp, Inc. director Joseph R. Nolan Jr. reported acquiring 2,402 shares of the company’s common stock on January 2, 2026.

Filing Impact

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Filing Sentiment

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Form Type

Rhea-AI Filing Summary

NB Bancorp, Inc. director Joseph R. Nolan Jr. reported acquiring 2,402 shares of the company’s common stock on January 2, 2026. The shares were acquired at a price of $0 per share and are described as restricted stock that vests 100% on January 2, 2027. Following this transaction, Nolan beneficially owned a total of 87,739 shares of NB Bancorp common stock in direct ownership. The total includes other restricted shares that vest at a rate of 20% per year beginning April 24, 2026.

Insider Trade Summary

Grant/Award: 2,402 shares

Grant/Award 1 txn

Insider NOLAN JOSEPH R JR

Role Director

Type	Security	Shares	Price	Value
Grant/Award	Common Stock	2,402	$0.00	$0.00

Holdings After Transaction: Common Stock — 87,739 shares (Direct)

Footnotes (2)

F1. Shares of restricted stock vest 100% on January 2, 2027.
F2. Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

Who reported a transaction in NB Bancorp (NBBK) in this Form 4?

The reporting person is Joseph R. Nolan Jr., who is identified as a director of NB Bancorp, Inc.

What type of NB Bancorp (NBBK) security was involved in the transaction?

The transaction involved common stock of NB Bancorp, Inc., reported as a non-derivative security.

How many NB Bancorp (NBBK) shares did the director acquire and on what date?

On January 2, 2026, the director acquired 2,402 shares of NB Bancorp common stock in a single reported transaction.

When do the newly acquired restricted NB Bancorp (NBBK) shares vest?

According to the filing, these shares of restricted stock vest 100% on January 2, 2027.

How many NB Bancorp (NBBK) shares does the director own after this transaction?

After the reported acquisition, the director beneficially owned 87,739 shares of NB Bancorp common stock in direct ownership.

What other restricted NB Bancorp (NBBK) shares are included in the director’s holdings?

The total beneficial ownership includes shares of restricted stock that vest at a rate of 20% per year commencing on April 24, 2026.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Accepted by SEC EDGAR 01/06/2026 - 12:25 PM EST

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^*

NOLAN JOSEPH R JR

(Last)

(First)

(Middle)

1063 GREAT PLAIN AVE

(Street)

NEEDHAM

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)

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

3. Date of Earliest Transaction (Month/Day/Year)
01/02/2026

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)
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	Code	V	Amount	(A) or (D)	Price		6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
Common Stock	01/02/2026		A		2,402⁽¹⁾	A	$0	87,739⁽²⁾	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)
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)	Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares	8. Price of Derivative Security (Instr. 5)		10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)

Explanation of Responses:

1. Shares of restricted stock vest 100% on January 2, 2027.

2. Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026.

	/s/ Steven Lanter, pursuant to power of attorney	01/06/2026
	** 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.

Source: View Original Filing on SEC EDGAR