0001437749-26-013440.txt : 20260427 0001437749-26-013440.hdr.sgml : 20260427 20260427145158 ACCESSION NUMBER: 0001437749-26-013440 CONFORMED SUBMISSION TYPE: 4 PUBLIC DOCUMENT COUNT: 1 CONFORMED PERIOD OF REPORT: 20260424 FILED AS OF DATE: 20260427 DATE AS OF CHANGE: 20260427 REPORTING-OWNER: OWNER DATA: COMPANY CONFORMED NAME: CAMPANELLI JOSEPH P CENTRAL INDEX KEY: 0001222378 ORGANIZATION NAME: FILING VALUES: FORM TYPE: 4 SEC ACT: 1934 Act SEC FILE NUMBER: 001-41899 FILM NUMBER: 26899911 MAIL ADDRESS: STREET 1: C/O NB BANCORP, INC. STREET 2: 1063 GREAT PLAIN AVENUE CITY: NEEDHAM STATE: MA ZIP: 02492 ISSUER: COMPANY DATA: COMPANY CONFORMED NAME: NB Bancorp, Inc. CENTRAL INDEX KEY: 0001979330 STANDARD INDUSTRIAL CLASSIFICATION: SAVINGS INSTITUTIONS, NOT FEDERALLY CHARTERED [6036] ORGANIZATION NAME: 02 Finance EIN: 932560883 FISCAL YEAR END: 1231 BUSINESS ADDRESS: STREET 1: 1063 GREAT PLAIN AVENUE CITY: NEEDHAM STATE: MA ZIP: 02492 BUSINESS PHONE: 781-444-2100 MAIL ADDRESS: STREET 1: 1063 GREAT PLAIN AVENUE CITY: NEEDHAM STATE: MA ZIP: 02492 4 1 rdgdoc.xml FORM 4 X0609 4 2026-04-24 0001979330 NB Bancorp, Inc. NBBK 0001222378 CAMPANELLI JOSEPH P false 1063 GREAT PLAIN AVE NEEDHAM MA 02492 1 1 1 President & CEO Chairman of the Board 0 Common Stock 2026-04-24 4 F 0 24371 19.82 D 372290 D Common Stock 2026-04-24 4 P 0 320 19.33 A 372610 D Common Stock 2026-04-24 4 P 0 180 19.34 A 372790 D Common Stock 2026-04-24 4 P 0 500 19.37 A 373290 D Common Stock 2026-04-24 4 P 0 722 19.45 A 374012 D Common Stock 2026-04-24 4 P 0 178 19.46 A 374190 D Common Stock 2026-04-24 4 P 0 100 19.47 A 374290 D Common Stock 2026-04-24 4 P 0 500 19.625 A 374790 D Common Stock 47000 I By IRA Common Stock 3000 I As trustee for trust Common Stock 50470 I By 401(k) Common Stock 3677 I By ESOP Includes shares of restricted stock which vest at a rate of 20% per year commencing on April 24, 2026. Includes shares of restricted stock which vest at a rate of 33 1/3% per year commencing on February 25, 2027. Reflects transactions not required to be reported pursuant to Section 16 of the Securities Act of 1934, as amended. /s/ Steven Lanter, pursuant to power of attorney 2026-04-27