NB BANCORP, INC._May 12, 2026

UNITED STATES
SECURITIES AND EXCHANGE COMMISSION
WASHINGTON, D.C. 20549

FORM 8-K
CURRENT REPORT

PURSUANT TO SECTION 13 OR 15(D) OF
THE SECURITIES EXCHANGE ACT OF 1934

Date of Report (Date of earliest event reported): May 12, 2026

NB BANCORP, INC.

(Exact Name of Registrant as Specified in Charter)


Maryland	001-41899	93-2560883
(State or Other Jurisdiction)	(Commission File No.)	(I.R.S. Employer
of Incorporation)		Identification No.)


	1063 Great Plain Avenue, Needham, Massachusetts	02492
	(Address of Principal Executive Offices)	(Zip Code)

Registrant’s telephone number, including area code: (781) 444-2100

Not Applicable
(Former name or former address, if changed since last report)

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant under any of the following provisions (see General Instruction A.2. below):

☐	Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425)

☐	Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12)

☐	Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b))

☐	Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))

Securities registered pursuant to Section 12(b) of the Act:


Title of each class		Trading Symbol(s)		Name of each exchange on which registered
Common Stock, Par Value $0.01 Per Share		NBBK		The Nasdaq Stock Market, LLC

Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).

Emerging growth company ☒

If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act. ☐

Item 8.01 Other Events

On May 13, 2026, NB Bancorp, Inc. (the “Company”) announced the completion of its stock repurchase program. Under the plan, the Company repurchased 2,207,236 shares, or approximately 5% of its then outstanding common stock. The shares were repurchased by the Company at an average price of $20.96 per share, including commission and excise tax.

Since announcing its first stock repurchase program on January 22, 2025, through the completion of the third stock repurchase program, the Company has repurchased 6,371,044 shares, or 16% of its common shares that were issued in its initial public offering at the end of 2023, at a weighted average price of $19.25. The Company’s tangible book value per share was $18.00 as of March 31, 2026.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, the registrant has duly caused this report to be signed on its behalf by the undersigned, hereunto duly authorized.


		NB BANCORP, INC.

DATE: May 13, 2026	By:	/s/ Jean-Pierre Lapointe
		Jean-Pierre Lapointe Senior Executive Vice President and Chief Financial Officer

NB Bancorp Inc. filed SEC Form 8-K: Other Events