{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-060111","form_type":"8-K","ticker":"NBBK","cik":"0001979330","company_name":"NB Bancorp, Inc.","filed_at":"2026-05-13T18:00:31+00:00","discovered_at":"2026-05-13T18:01:00.384718+00:00","generated_at":"2026-05-13T18:01:21.109466+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"positive","materiality_score":0.7,"calibrated_materiality_score":0.7,"confidence":"high","headline":"NB Bancorp completes stock repurchase; 2.2M shares bought at avg $20.96","bullets":["Repurchased 2,207,236 shares (~5% of outstanding) at average price $20.96/share.","Cumulative buybacks since Jan 2025: 6,371,044 shares (16% of IPO shares) at weighted avg $19.25.","Tangible book value per share was $18.00 as of March 31, 2026."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-060111","json":"https://secwatch.observer/filing/0001104659-26-060111.json","markdown":"https://secwatch.observer/filing/0001104659-26-060111.md","text":"https://secwatch.observer/filing/0001104659-26-060111.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1979330/000110465926060111/0001104659-26-060111-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1979330/000110465926060111/nbbk-20260512x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-13T18:01:21.109466+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"}