{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-001005","form_type":"8-K","ticker":"PB","cik":"0001068851","company_name":"PROSPERITY BANCSHARES INC","filed_at":"2026-01-02T23:59:59+00:00","discovered_at":"2026-05-14T18:02:34.492766+00:00","generated_at":"2026-05-16T11:46:41.957126+00:00","sec_items":["8.01","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Prosperity Bancshares closes all-stock acquisition of American Bank; issues 4.44M shares","bullets":["Merger of American Bank Holding Corp and American Bank into Prosperity effective January 1, 2026.","Prosperity issued 4,439,981 shares of common stock to American shareholders and award holders.","Stephen Raffaele named South Texas and San Antonio Area Chairman; Ben Wallace named South Texas Senior Chairman.","Acquired 18 banking offices and 2 loan production offices in South and Central Texas.","Operational integration of American Bank branches scheduled for September 2026."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-001005","json":"https://secwatch.observer/filing/0001193125-26-001005.json","markdown":"https://secwatch.observer/filing/0001193125-26-001005.md","text":"https://secwatch.observer/filing/0001193125-26-001005.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1068851/000119312526001005/0001193125-26-001005-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1068851/000119312526001005/pb-20260102.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T11:46:41.957126+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"}