{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-26-007678","form_type":"8-K","ticker":"STEL","cik":"0001473844","company_name":"Stellar Bancorp, Inc.","filed_at":"2026-01-29T23:59:59+00:00","discovered_at":"2026-05-14T18:02:35.148307+00:00","generated_at":"2026-05-16T06:23:40.083513+00:00","sec_items":["1.01","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":0.85,"calibrated_materiality_score":0.85,"confidence":"high","headline":"Stellar Bancorp to be acquired by Prosperity Bancshares in stock-and-cash deal","bullets":["Stellar stockholders to receive 0.3803 Prosperity shares and $11.36 cash per share.","Termination fee of $78 million payable by Stellar under certain conditions.","Directors holding ~8.8% of Stellar shares entered voting agreements to support the merger.","Two Stellar directors to join Prosperity board after closing; Stellar equity awards cashed out.","Closing requires Stellar shareholder vote, regulatory approvals, and no legal restraints."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-26-007678","json":"https://secwatch.observer/filing/0001104659-26-007678.json","markdown":"https://secwatch.observer/filing/0001104659-26-007678.md","text":"https://secwatch.observer/filing/0001104659-26-007678.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1473844/000110465926007678/0001104659-26-007678-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1473844/000110465926007678/tm264235d6_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-05-16T06:23:40.083513+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":[{"claim_id":"e895c6b29fb1c022a2afaa832e3cb84ab910a842","claim":"Stellar Bancorp, Inc. entered into Agreement and Plan of Merger with Prosperity Bancshares, Inc. (effective 2026-01-27).","evidence_excerpt":"On January 27, 2026, Stellar Bancorp, Inc., a Texas corporation (“Stellar”), entered into an Agreement and Plan of Merger (the “Merger Agreement”) with Prosperity Bancshares, Inc., a Texas corporation (“Prosperity”).","evidence_source":"SEC 8-K Item 1.01/1.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1473844/000110465926007678/0001104659-26-007678-index.htm","confidence":0.9,"family_label":"Material Agreements","details":[{"label":"Action","value":"entry"},{"label":"Agreement","value":"merger"},{"label":"Counterparty","value":"Prosperity Bancshares, Inc."},{"label":"Effective","value":"2026-01-27"}],"fact_type":"material_agreement"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}