Christopher R. Lynch - 02 Jan 2026 Form 4 Insider Report for NB Bancorp, Inc. (NBBK)

Role
Director
Signature
/s/ Steven Lanter, pursuant to power of attorney
Issuer symbol
NBBK
Transactions as of
02 Jan 2026
Net transactions value
$0
Form type
4
Filing time
06 Jan 2026, 12:27:51 UTC
Previous filing
12 Nov 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
Lynch Christopher R. Director 1063 GREAT PLAIN AVE, NEEDHAM /s/ Steven Lanter, pursuant to power of attorney 06 Jan 2026 0002003622

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction NBBK Common Stock Award $0 +7,685 +8.6% $0.000000 96,922 02 Jan 2026 Direct F1, F2
holding NBBK Common Stock 60,000 02 Jan 2026 By IRA
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
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.