{"schema_version":"secwatch.filing_event.v1","accession":"0000943374-23-000508","form_type":"8-K","ticker":"NBBK","cik":"0001979330","company_name":"NB Bancorp, Inc.","filed_at":"2023-12-27T23:59:59+00:00","discovered_at":"2026-05-14T18:03:31.494563+00:00","generated_at":"2026-06-07T07:08:35.832181+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"NB Bancorp completes IPO, sells 40.9975M shares at $10.00; begins trading on Nasdaq Dec 28 under NBBK","bullets":["Completed IPO of 40,997,500 shares at $10.00 per share in mutual-to-stock conversion of NB Financial, MHC.","Common stock begins trading on Nasdaq Capital Market under symbol NBBK on December 28, 2023.","Contributed 1,708,229 shares and $2.0M cash to Needham Bank Charitable Foundation.","ESOP intends to purchase up to 3,416,458 shares (8% of outstanding) in the open market."],"urls":{"canonical":"https://secwatch.observer/filing/0000943374-23-000508","json":"https://secwatch.observer/filing/0000943374-23-000508.json","markdown":"https://secwatch.observer/filing/0000943374-23-000508.md","text":"https://secwatch.observer/filing/0000943374-23-000508.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1979330/000094337423000508/0000943374-23-000508-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1979330/000094337423000508/form8k_122723.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T07:08:35.832181+00:00"},"review":{"review_status":"machine_generated","human_reviewed":false,"corrected":false,"correction_note":null,"correction_timestamp":null,"superseded_by":null,"related_filings":[]},"source_grounded_claims":[],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}