{"schema_version":"secwatch.filing_event.v1","accession":"0001104659-23-090991","form_type":"8-K","ticker":"AEE","cik":"0001002910","company_name":"AMEREN CORP","filed_at":"2023-08-14T23:59:59+00:00","discovered_at":"2026-05-14T18:03:32.822857+00:00","generated_at":"2026-06-11T09:52:49.921207+00:00","sec_items":["5.02"],"event_type":"leadership","sentiment":"neutral","materiality_score":0.6,"calibrated_materiality_score":0.6,"confidence":"high","headline":"Executive Chairman Warner L. Baxter to retire Nov 2, 2023; CEO Martin Lyons named Chairman","bullets":["Warner L. Baxter notified Company he will retire from Board and as Executive Chairman effective November 2, 2023.","Board elected Martin J. Lyons, Jr., President and CEO, to additional role of Chairman, effective same date.","Chairman role added to Lyons' existing duties; no other changes to executive leadership disclosed."],"urls":{"canonical":"https://secwatch.observer/filing/0001104659-23-090991","json":"https://secwatch.observer/filing/0001104659-23-090991.json","markdown":"https://secwatch.observer/filing/0001104659-23-090991.md","text":"https://secwatch.observer/filing/0001104659-23-090991.txt","edgar_index":"https://www.sec.gov/Archives/edgar/data/1002910/000110465923090991/0001104659-23-090991-index.htm","edgar_primary_document":"https://www.sec.gov/Archives/edgar/data/1002910/000110465923090991/tm2323531d1_8k.htm"},"model":{"generated_by":"deepseek-v4-flash:cloud@v2","generated_at":"2026-06-11T09:52:49.921207+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":"15afda7195","claim":"Martin J. Lyons, Jr. was elected as Chairman at AMEREN CORP.","evidence_excerpt":"The Board has elected Martin J. Lyons, Jr., the President and Chief Executive Officer of the Company and a member of the Board, to the additional role of Chairman, effective upon Mr. Baxter's retirement on November 2, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1002910/000110465923090991/0001104659-23-090991-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"elected"},{"label":"Role","value":"Chairman"}],"fact_type":"executive_change"},{"claim_id":"5756a47543","claim":"Warner L. Baxter departed as Executive Chairman at AMEREN CORP.","evidence_excerpt":"Warner L. Baxter, Executive Chairman of Ameren Corporation (the \"Company\"), notified the Company that he will retire from the Company's Board of Directors (the \"Board\") and as Executive Chairman, effective November 2, 2023.","evidence_source":"SEC 8-K Item 5.02","evidence_url":"https://www.sec.gov/Archives/edgar/data/1002910/000110465923090991/0001104659-23-090991-index.htm","confidence":0.95,"family_label":"Executive change","details":[{"label":"Action","value":"retire"},{"label":"Role","value":"Executive Chairman"}],"fact_type":"executive_change"}],"license":"Source filings: public domain (SEC EDGAR). Summaries (headline + bullets): CC-BY-4.0; attribute https://secwatch.observer"}