Joseph P. Campanelli - 06 Mar 2026 Form 4 Insider Report for NB Bancorp, Inc. (NBBK)

Role
President & CEO, Director, Chairman of the Board
Signature
/s/ Steven Lanter, pursuant to power of attorney
Issuer symbol
NBBK
Transactions as of
06 Mar 2026
Net transactions value
+$103,870
Form type
4
Filing time
09 Mar 2026, 16:07:34 UTC
Previous filing
27 Feb 2026
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
CAMPANELLI JOSEPH P President & CEO, Director, Chairman of the Board 1063 GREAT PLAIN AVE, NEEDHAM /s/ Steven Lanter, pursuant to power of attorney 09 Mar 2026 0001222378

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction NBBK Common Stock Purchase $41,560 +2,000 +4.4% $20.78 47,000 06 Mar 2026 By IRA
transaction NBBK Common Stock Purchase $62,310 +3,000 $20.77 3,000 06 Mar 2026 As trustee for trust
holding NBBK Common Stock 394,161 06 Mar 2026 Direct F1, F2
holding NBBK Common Stock 45,000 06 Mar 2026 By IRA
holding NBBK Common Stock 49,597 06 Mar 2026 By 401(k)
holding NBBK Common Stock 3,677 06 Mar 2026 By ESOP
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026.
F2 Includes shares of restricted stock which vest at a rate of 33 1/3% per year commencing on February 25, 2027.