{"schema_version":"secwatch.filing_event.v1","accession":"0001193125-26-291511","form_type":"8-K","ticker":"STEL","cik":"0001473844","company_name":"Stellar Bancorp, Inc.","filed_at":"2026-07-01T11:30:06+00:00","discovered_at":"2026-07-01T11:35:00.279338+00:00","generated_at":"2026-07-01T11:35:21.375061+00:00","sec_items":["2.01","3.01","3.03","5.01","5.02","5.03","8.01","9.01"],"event_type":"m_and_a","sentiment":"neutral","materiality_score":1.0,"calibrated_materiality_score":1.0,"confidence":"high","headline":"Stellar Bancorp completes merger with Prosperity Bancshares; stock delisted","bullets":["Merger closed July 1, 2026; each Stellar share converted to 0.3803 Prosperity shares plus $11.36 cash.","Stellar directors and officers resigned; Robert R. Franklin, Jr. and Joseph B. Swinbank appointed to Prosperity board.","Stellar sold approximately $466.4M of securities (agency MBS, CMBS, CMOs, municipals, corporate debt) as balance sheet repositioning.","Stellar Common Stock delisted from NYSE; Prosperity intends to file Form 15 to deregister and suspend reporting."],"urls":{"canonical":"https://secwatch.observer/filing/0001193125-26-291511","json":"https://secwatch.observer/filing/0001193125-26-291511.json","markdown":"https://secwatch.observer/filing/0001193125-26-291511.md","text":"https://secwatch.observer/filing/0001193125-26-291511.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1473844/000119312526291511/0001193125-26-291511-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1473844/000119312526291511/d116708d8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-07-01T11:35:21.375061+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":"9226b2e3fa","claim":"Robert R. Franklin, Jr. departed as Director at Stellar Bancorp, Inc..","evidence_excerpt":"Stellar’s directors and executive officers ceased serving as directors and executive officers of Stellar.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1473844/000119312526291511/0001193125-26-291511-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"ceased serving"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"},{"claim_id":"b8dfb36149","claim":"Joseph B. Swinbank departed as Director at Stellar Bancorp, Inc..","evidence_excerpt":"Stellar’s directors and executive officers ceased serving as directors and executive officers of Stellar.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1473844/000119312526291511/0001193125-26-291511-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"ceased serving"},{"label":"Role","value":"Director"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}