Ameren Corp 8-K Filing

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Key Financial Figures

• $0.01 — nge on which registered Common Stock, $0.01 par value per share AEE New York St

Filing Documents

• tm2532033d1_8k.htm (8-K) — 47KB
• 0001104659-25-115502.txt ( ) — 258KB
• aee-20251124.xsd (EX-101.SCH) — 3KB
• aee-20251124_def.xml (EX-101.DEF) — 26KB
• aee-20251124_lab.xml (EX-101.LAB) — 35KB
• aee-20251124_pre.xml (EX-101.PRE) — 24KB
• tm2532033d1_8k_htm.xml (XML) — 7KB

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ITEM 8.01 Other Events. Reference is made to Note 2 – Rate and Regulatory Matters to the financial statements under Part I, Item 1. Financial Statements and to Overview and Outlook under Part I, Item 2. Management's Discussion and Analysis of Financial Condition and Results of Operations, each in the Quarterly Report on Form 10-Q for the quarter ended September 30, 2025, of registrants Ameren Corporation and Union Electric Company, doing business as Ameren Missouri ("Ameren Missouri"), for a discussion of Ameren Missouri's request to modify its existing large primary service tariff (the "Large Load Customer Rate Plan"), which was filed with the Missouri Public Service Commission (the "MoPSC") in May 2025 and updated in November 2025. On November 24, 2025, the MoPSC issued an order (the "Large Load Order") approving an amended non-unanimous global stipulation and agreement among Ameren Missouri, the staff of the MoPSC, and all other intervenors in the Large Load Customer Rate Plan proceeding, other than the Missouri Office of Public Counsel, which did not object. The Large Load Order applies to electric service provided to (i) new facilities with a monthly load demand expected to be 75 megawatts or more, and (ii) existing customers that have a monthly load demand that is expected to expand by 75 megawatts or more. Such customers will be required to enter into an electric service agreement ("ESA") that specifies certain provisions of their electric service. The ESAs will have a minimum service term of 12 years plus a ramp period of up to five years to reach peak demand. Under the ESAs, customers must pay demand charges on a minimum of 80% of contracted capacity and provide written notice of service termination at least 24 months in advance. Termination of an ESA during the ramp period will result in an exit fee equivalent to the customer's minimum monthly bill multiplied by the number of months in the remaining term of the ramp period plus 60 months. Terminatio

SIGNATURES

SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. The signature for each undersigned company shall be deemed to relate only to matters having reference to such company or its subsidiaries. AMEREN CORPORATION (Registrant) By: /s/ Michael L. Moehn Name: Michael L. Moehn Title: Senior Executive Vice President and Chief Financial Officer UNION ELECTRIC COMPANY (Registrant) By: /s/ Michael L. Moehn Name: Michael L. Moehn Title: Interim Chairman and President, Senior Executive Vice President and Chief Financial Officer Date: November 24, 2025 2

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