Ameren said its subsidiary Ameren Missouri sold $450 million principal amount of 4.80% First Mortgage Bonds due 2036 and $450 million principal amount of 5.55% First Mortgage Bonds due 2056 on February 27, 2026.

1. 01

   Ameren said its subsidiary Ameren Missouri sold $450 million principal amount of 4.80% First Mortgage Bonds due 2036 and $450 million principal amount of 5.55% First Mortgage Bonds due 2056 on February 27, 2026.

2. 02

   The company said Ameren Missouri received aggregate net offering proceeds of approximately $891.1 million, before expenses, upon closing of the transaction.

3. 03

   Ameren said the Bonds were offered pursuant to a Registration Statement on Form S-3 (File No. 333-274977-02), which became effective on October 13, 2023, and a Prospectus Supplement dated February 23, 2026 to a Prospectus dated October 13, 2023.

4. 04

   The company said the Form 8-K filing was being filed to report as exhibits certain documents in connection with the offering of the Bonds, including an Underwriting Agreement dated February 23, 2026 and a Supplemental Indenture dated February 1, 2026.

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