Shareholder Vote

UNITED STATES SECURITIES AND EXCHANGE COMMISSION Washington, D.C. 20549   FORM  8-K   CURRENT REPORT Pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934   Date of report (Date of earliest event reported): May 8, 2025   Commission File Number   Exact Name of Registrant as Specified in Charter; State of Incorporation; Address and Telephone Number   IRS Employer Identification Number   1-14756     Ameren Corporation ( Missouri Corporation) 1901 Chouteau Avenue St. Louis , Missouri 63103 ( 314 ) 621-3222       43-1723446   1-2967   Union Electric Company ( Missouri Corporation) 1901 Chouteau Avenue St. Louis , Missouri 63103 ( 314 ) 621-3222   43-0559760   1-3672   Ameren Illinois Company ( Illinois Corporation) 10 Richard Mark Way Collinsville , Illinois 62234 ( 618 ) 343-8150   37-0211380   Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrants under any of the following provisions: ¨ Written communications pursuant to Rule 425 under the Securities Act (17 CFR 230.425) ¨ Soliciting material pursuant to Rule 14a-12 under the Exchange Act (17 CFR 240.14a-12) ¨ Pre-commencement communications pursuant to Rule 14d-2(b) under the Exchange Act (17 CFR 240.14d-2(b)) ¨ Pre-commencement communications pursuant to Rule 13e-4(c) under the Exchange Act (17 CFR 240.13e-4(c))   Securities registered pursuant to Section 12(b) of the Act:   Title of each class   Trading Symbol(s)   Name of each exchange on which registered Common Stock, $0.01 par value per share   AEE   New York Stock Exchange   Indicate by check mark whether the registrant is an emerging growth company as defined in Rule 405 of the Securities Act of 1933 (§230.405 of this chapter) or Rule 12b-2 of the Securities Exchange Act of 1934 (§240.12b-2 of this chapter).     Emerging Growth Company   Ameren Corporation ¨   Union Electric Company ¨   Ameren Illinois Company ¨     If an emerging growth company, indicate by check mark if the registrant has elected not to use the extended transition period for complying with any new or revised financial accounting standards provided pursuant to Section 13(a) of the Exchange Act.   Ameren Corporation ¨   Union Electric Company ¨   Ameren Illinois Company ¨     Co-Registrant CIK 0000100826 Co-Registrant Amendment Flag false Co-Registrant Form Type 8-K Co-Registrant DocumentperiodEndDate 2025-05-08 Co-Registrant Written Commuunications false Co-Registrant Solicitating Materials false Co-Registrant PreCommencement Tender Offer false Co-Registrant PreCommencement Tender Offer false Co-Registrant Entity PreCommencement Issuer Tender Offer false Co-Registrant CIK 0000018654 Co-Registrant Amendment Flag false Co-Registrant Form Type 8-K Co-Registrant DocumentperiodEndDate 2025-05-08 Co-Registrant Written Commuunications false Co-Registrant Solicitating Materials false Co-Registrant PreCommencement Tender Offer false Co-Registrant PreCommencement Tender Offer false Co-Registrant Entity PreCommencement Issuer Tender Offer false       ITEM 5.07 Submission of Matters to a Vote of Security Holders.   At the annual meeting of shareholders of each of Ameren Corporation (“Ameren”), Union Electric Company, doing business as Ameren Missouri (“Ameren Missouri”), and Ameren Illinois Company, doing business as Ameren Illinois (“Ameren Illinois”), held on May 8, 2025 (“Annual Meeting”), the matters listed below were submitted to a vote of each company’s respective shareholders.   Ameren   Item (1): Election of Directors   The following individuals (comprising Ameren’s full Board of Directors) were elected:   Name Votes For Votes Against Abstentions Broker Non-Votes Cynthia J. Brinkley 210,452,419 5,343,302 516,931 22,512,263 Catherine S. Brune 207,329,218 8,537,121 446,313 22,512,263 Ward H. Dickson 214,393,842 1,464,784 454,026 22,512,263 Ellen M. Fitzsimmons 209,364,050 6,518,784 429,818 22,512,263 Rafael Flores 211,063,253 4,732,696 516,703 22,512,263 Richard J. Harshman 210,268,482 5,593,134 451,036 22,512,263 Craig S. Ivey 214,290,975 1,575,990 445,687 22,512,263 Steven H. Lipstein 208,128,668 7,680,587 503,397 22,512,263 Martin J. Lyons, Jr. 209,341,722 6,565,956 404,974 22,512,263 Leo S. Mackay, Jr. 213,522,767 2,289,027 500,858 22,512,263 Steven O. Vondran 214,666,359 1,182,638 463,655 22,512,263     Item (2): Advisory Approval of Executive Compensation   Vote Result Votes For Votes Against Abstentions Broker Non-Votes Approved 206,339,111 8,984,597 988,944 22,512,263     Item (3): Ratification of the Appointment of PricewaterhouseCoopers LLP as Independent Registered Public Accounting Firm for the Fiscal Year Ending December 31, 2025   Vote Result Votes For Votes Against Abstentions Broker Non-Votes Approved 229,830,516 8,435,345 559,054 —     Item (4): Shareholder Proposal Regarding Evaluation of Greenhouse Gas Reduction Targets   Vote Result Votes For Votes Against Abstentions Broker Non-Votes Not Approved 17,271,457 196,547,939 2,493,256 22,512,263     Ameren Missouri   Item (1): Election of Directors   At Ameren Missouri’s Annual Meeting, the following individuals (comprising Ameren Missouri’s full Board of Directors) were elected: Mark C. Birk, Fadi M. Diya, and Michael L. Moehn. Each individual received 102,123,834 votes for election and no withheld votes, abstentions or broker non-votes.         Ameren Illinois   Item (1): Election of Directors   At Ameren Illinois’ Annual Meeting, the following individuals (comprising Ameren Illinois’ full Board of Directors) were elected: Leonard P. Singh, Michael L. Moehn, Theresa A. Shaw, and Patrick E. Smith. Each individual received 25,452,373 votes for election and no withheld votes, abstentions or broker non-votes.       This combined Form 8-K is being filed separately by Ameren Corporation, Union Electric Company and Ameren Illinois Company (each a “registrant”). Information contained herein relating to any individual registrant has been filed by such registrant on its own behalf. No registrant makes any representation as to information relating to any other registrant.         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/ Stephen C. Lee   Name: Stephen C. Lee   Title: Vice President, Interim General Counsel and Secretary         UNION ELECTRIC COMPANY (Registrant)         By: /s/ Stephen C. Lee   Name: Stephen C. Lee   Title: Vice President, Interim General Counsel and Secretary         AMEREN ILLINOIS COMPANY (Registrant)         By: /s/ Stephen C. Lee   Name: Stephen C. Lee   Title: Vice President, Interim General Counsel and Secretary   Date: May 12, 2025