{"url_path":"/sec/nbbk/8-k/2026-05-21/item-9-01","section_key":"item-9-01","section_title":"Item 9.01 Financial Statements and Exhibits.","topic":"sec","document":{"doc_type":"8-K","doc_date":"2026-05-21","source_url":"https://www.sec.gov/Archives/edgar/data/1979330/0001104659-26-064982-index.html","accession_number":"0001104659-26-064982","cik":"0001979330","ticker":"NBBK","issuer_name":"NB Bancorp, Inc.","edgar_url":"https://www.sec.gov/Archives/edgar/data/1979330/0001104659-26-064982-index.html","primary_entity_key":"0001979330","primary_entity_name":"NB Bancorp, Inc."},"word_count":108,"has_tables":true,"body_markdown":"Item 9.01\n\nFinancial Statements and Exhibits.\n\n(d)\n\nExhibits\n\n​\n\n​\n\n​\n\nExhibit No.\n\n  ​ ​ ​\n\nDescription\n\n99.1\n\n​\n\n[Presentation Materials of NB Bancorp, Inc. dated June 2, 2026](nbbk-20260521xex99d1.htm)\n\n104\n\n​\n\nCover Page Interactive Data File (Embedded within Inline XBRL document)\n\n​\n\n​\n\n​\n\n​\n\n​\n\nSIGNATURES\n\nPursuant 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.\n\n​\n\n​\n\n​\n\n​\n\n​\n\nNB BANCORP, INC.\n\n​\n\n​\n\n​\n\nDATE: May 21, 2026\n\nBy: \n\n/s/Jean-Pierre Lapointe\n\n​\n\n​\n\nSenior Executive Vice President and Chief Financial Officer\n\n​\n\n​\n\n​"}