{"schema_version":"secwatch.filing_event.v1","accession":"0001558370-25-004102","form_type":"8-K","ticker":"NBBK","cik":"0001979330","company_name":"NB Bancorp, Inc.","filed_at":"2025-03-31T23:59:59+00:00","discovered_at":"2026-05-14T18:03:05.707175+00:00","generated_at":"2026-05-24T02:34:04.870030+00:00","sec_items":["8.01"],"event_type":"other_material","sentiment":"neutral","materiality_score":0.5,"calibrated_materiality_score":0.5,"confidence":"high","headline":"NB Bancorp completes 5% stock repurchase, buying back 2.1M shares at $19.06","bullets":["Repurchased 2,135,286 shares, or approximately 5% of then-outstanding common stock.","Average repurchase price of $19.06 per share, inclusive of commission and excise tax.","Announcement made on March 28, 2025; program is now completed."],"urls":{"canonical":"https://secwatch.observer/filing/0001558370-25-004102","json":"https://secwatch.observer/filing/0001558370-25-004102.json","markdown":"https://secwatch.observer/filing/0001558370-25-004102.md","text":"https://secwatch.observer/filing/0001558370-25-004102.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1979330/000155837025004102/0001558370-25-004102-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1979330/000155837025004102/nbbk-20250328x8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-24T02:34:04.870030+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"}