{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-128325","form_type":"8-K","ticker":"NBBK","cik":"0001979330","company_name":"NB Bancorp, Inc.","filed_at":"2023-12-21T23:59:59+00:00","discovered_at":"2026-05-14T18:03:31.494341+00:00","generated_at":"2026-06-07T09:30:17.639129+00:00","sec_items":["8.01","9.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.75,"calibrated_materiality_score":0.75,"confidence":"high","headline":"NB Bancorp expects conversion and IPO close Dec 27; 40.9975M shares at $10 on Nasdaq","bullets":["Conversion and IPO close expected Dec 27, 2023; shares to trade on Nasdaq under \"NBBK\" on Dec 28.","Offering oversubscribed; 40,997,500 shares sold at $10.00 per share.","ESOP intends to purchase up to 8% of outstanding shares (3,416,458) in open market.","Company to contribute 1,708,229 shares and $2.0M cash to Needham Bank Charitable Foundation.","Subscription oversubscribed by first-tier priority depositors; other orders not filled."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-128325","json":"https://secwatch.observer/filing/0001104659-23-128325.json","markdown":"https://secwatch.observer/filing/0001104659-23-128325.md","text":"https://secwatch.observer/filing/0001104659-23-128325.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1979330/000110465923128325/0001104659-23-128325-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1979330/000110465923128325/tm2333547d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-07T09:30:17.639129+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"}