{"filing": {"accession": "0001104659-26-108859", "cik": "0001002910", "ticker": "AEE", "company_name": "AMEREN CORP", "form_type": "8-K", "filing_type": "8-K", "filing_date": "2026-09-18", "accepted_datetime": null, "acceptance_datetime": null, "accepted_at": null, "primary_doc_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/0001104659-26-108859-index.htm", "filing_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/0001104659-26-108859-index.htm", "period_of_report": "2026-09-18"}, "html_url": "/api/filings/000110465926108859/stream", "exhibits": [{"exhibit_number": "1", "exhibit_type": "1", "description": "Underwriting Agreement, dated September 8, 2026, between Ameren and the several underwriters named therein, for whom Barclays Capital Inc., BofA Securities, Inc., J.P. Morgan Securities LLC, Morgan Stanley & Co. LLC, MUFG Securities Americas Inc. and Truist Securities, Inc. are acting as representatives.", "filename": "tm2625603d1_ex1.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_ex1.htm", "category": "debt", "incorporated_by_reference": false}, {"exhibit_number": "4.1", "exhibit_type": "4", "description": "Indenture, dated as of September 1, 2026, by and between Ameren and The Bank of New York Mellon Trust Company, N.A., as trustee (\u201cAmeren Indenture\u201d).", "filename": "tm2625603d1_ex4-1.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_ex4-1.htm", "category": "debt", "incorporated_by_reference": false}, {"exhibit_number": "4.2", "exhibit_type": "4", "description": "Company Order, dated September 18, 2026, establishing the Notes.", "filename": "tm2625603d1_ex4-2.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_ex4-2.htm", "category": "debt", "incorporated_by_reference": false}, {"exhibit_number": "4.3", "exhibit_type": "4", "description": "Global Notes.", "filename": "tm2625603d1_ex4-3.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_ex4-3.htm", "category": "debt", "incorporated_by_reference": false}, {"exhibit_number": "5.1", "exhibit_type": "5", "description": "Opinion of David M. Feinberg, Esq., Executive Vice President, General Counsel and Secretary of Ameren, regarding the legality of the Notes (including consent).", "filename": "tm2625603d1_ex5-1.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_ex5-1.htm", "category": "other", "incorporated_by_reference": false}, {"exhibit_number": "5.2", "exhibit_type": "5", "description": "", "filename": "tm2625603d1_ex5-2.htm", "edgar_url": "https://www.sec.gov/Archives/edgar/data/1002910/000110465926108859/tm2625603d1_ex5-2.htm", "category": "other", "incorporated_by_reference": false}], "sections": [], "tables": [{"table_index": 0, "table_type": "text", "caption": null, "header_text": "Missouri1-1475643-1723446"}, {"table_index": 1, "table_type": "text", "caption": null, "header_text": "Title\n of each classTrading\n Symbol(s)Name\nof each exchange on whichregistered"}, {"table_index": 5, "table_type": "exhibit_index", "caption": null, "header_text": "Exhibit NumberTitle"}, {"table_index": 6, "table_type": "text", "caption": null, "header_text": "AMEREN CORPORATION"}], "exhibits_pending": false, "cdn_html": true, "response_time_ms": 21}