ITEM 8.01 Other Events.

On June 29, 2021, Ameren Illinois Company ("Ameren Illinois"), a subsidiary of Ameren Corporation, sold $100 million principal amount of its 0.375% First Mortgage Bonds due 2023 (the "2023 Bonds") and $350 million principal amount of its 2.90% First Mortgage Bonds due 2051 (the "2051 Bonds" and together with the 2023 Bonds, the "Bonds"). The Bonds were offered pursuant to a Registration Statement on Form S-3 (File No. 333-249475-02), which became effective on October 14, 2020, a Prospectus Supplement dated June 22, 2021 to a Prospectus dated October 14, 2020 relating to the 2023 Bonds and a Prospectus Supplement dated June 22, 2021 to a Prospectus dated October 14, 2020 relating to the 2051 Bonds. Ameren Illinois received aggregate net offering proceeds of approximately $445.2 million, before expenses, upon closing of the transactions.

This Current Report on Form 8-K is being filed to report as exhibits certain documents in connection with the offering of the Bonds.

ITEM 9.01 Financial Statements and Exhibits.






(d) Exhibits




Exhibit Number Title




  1.1     Underwriting Agreement relating to the 2023 Bonds, dated June 22, 2021,
        between Ameren Illinois and the several underwriters named therein, for
        whom RBC Capital Markets, LLC, TD Securities (USA) LLC, Truist
        Securities, Inc. and Wells Fargo Securities, LLC are acting as
        representatives.




  1.2     Underwriting Agreement relating to the 2051 Bonds, dated June 22, 2021,
        between Ameren Illinois and the several underwriters named therein, for
        whom RBC Capital Markets, LLC, TD Securities (USA) LLC, Truist
        Securities, Inc. and Wells Fargo Securities, LLC are acting as
        representatives.

4.1* General Mortgage Indenture and Deed of Trust, dated as of November 1, 1992,


     from Ameren Illinois to The Bank of New York Mellon Trust Company, N.A., as
     successor trustee (1992 Form 10-K, Exhibit 4(cc), File No. 1-3004).




  4.2     Supplemental Indenture, dated as of June 1, 2021, by and between Ameren
        Illinois and The Bank of New York Mellon Trust Company, N.A., as
        successor trustee, relating to the 2023 Bonds and the 2051 Bonds.




  5.1     Opinion of Craig W. Stensland, Esq., Senior Corporate Counsel, Ameren
        Services Company, regarding the legality of the Bonds (including
        consent).




  5.2     Opinion of Morgan, Lewis & Bockius LLP regarding the legality of the
        Bonds (including consent).

104 Cover Page Interactive Data File (formatted as Inline XBRL).

* Incorporated by reference as indicated.

This combined Form 8-K is being filed separately by Ameren Corporation 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.





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