Company Update

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): December 20, 2024       Commission File Number Exact Name of Registrant as Specified in Charter; State of Incorporation; Address and Telephone Number   IRS Employer Identification Number       333-282616 Union Electric Company ( Missouri Corporation) 1901 Chouteau Avenue St. Louis , Missouri 63103 ( 314 ) 621-3222   43-0559760       333-282616-01 Ameren Missouri Securitization Funding I, LLC ( Delaware Corporation) 1901 Chouteau Avenue St. Louis , Missouri 63103 ( 314 ) 621-3222 33-1368847   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 N/A N/A N/A   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   Union Electric Company  ¨ Ameren Missouri Securitization Funding I, LLC  ¨   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.   Union Electric Company  ¨ Ameren Missouri Securitization Funding I, LLC  ¨     Co-Registrant CIK 0002039835 Co-Registrant Amendment Flag false Co-Registrant Form Type 8-K Co-Registrant DocumentperiodEndDate 2024-12-20 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 8.01 Other Events.   On December 20, 2024, Ameren Missouri Securitization Funding I, LLC (the “ Issuing Entity ”) issued $476,121,000 aggregate principal amount of Securitized Utility Tariff Bonds, Series 2024-A (the “ Bonds ”), pursuant to an Indenture and Series Supplement (together, the “ Indenture ”), each dated as of December 20, 2024, which are annexed hereto as Exhibits 4.1 and 4.2, respectively. The Bonds were offered pursuant to the prospectus dated December 10, 2024 (the “ Prospectus ”). In connection with this issuance of the Bonds, the Issuing Entity and Union Electric Company d/b/a Ameren Missouri (the “ Utility ”) entered into the Securitized Utility Tariff Property Servicing Agreement, Securitized Utility Tariff Property Purchase and Sale Agreement and Administration Agreement, each dated as of December 20, 2024, which are annexed hereto as Exhibits 10.1, 10.2 and 10.3, respectively.   ITEM 9.01 Financial Statements and Exhibits.   (d) Exhibits   Exhibit Number Title     4.1 Indenture between Ameren Missouri Securitization Funding I, LLC and The Bank of New York Mellon Trust Company, N.A., dated as of December 20, 2024 4.2 Series Supplement between Ameren Missouri Securitization Funding I, LLC and The Bank of New York Mellon Trust Company, N.A. (including forms of the Bonds), dated as of December 20, 2024 5.1 Opinion of Hunton Andrews Kurth LLP with respect to legality 10.1 Securitized Utility Tariff Property Servicing Agreement between Ameren Missouri Securitization Funding I, LLC and Union Electric Company, as Servicer, dated as of December 20, 2024 10.2 Securitized Utility Tariff Property Purchase and Sale Agreement between Ameren Missouri Securitization Funding I, LLC and Union Electric Company, as Seller, dated as of December 20, 2024 10.3 Administration Agreement between Ameren Missouri Securitization Funding I, LLC and Union Electric Company, as Administrator, dated as of December 20, 2024 23.1 Consent of Hunton Andrews Kurth LLP (included as part of its Opinions filed as Exhibits 5.1 and 99.1 ) 23.2 Consent of Dentons US LLP (included as part of its Opinion filed as Exhibit 99.2) 99.1 Opinion of Hunton Andrews Kurth LLP with respect to U.S. constitutional matters 99.2 Opinion of Dentons US LLP with respect to Missouri constitutional matters 104 Cover Page Interactive Data File – the cover page XBRL tags are embedded within the Inline XBRL document             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 hereunto duly authorized.     UNION ELECTRIC COMPANY   (Registrant)         By: /s/ Michael L. Moehn   Name: Michael L. Moehn Title: Senior Executive Vice President and Chief Financial Officer     AMEREN MISSOURI SECURITIZATION FUNDING I, LLC   (Registrant)         By: /s/ Darryl T. Sagel   Name: Darryl T. Sagel Title: President and Treasurer   Date: December 20, 2024