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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): November 20, 2023

AMEREN CORPORATION

(Exact name of registrant as specified in its charter)

Missouri

1-14756

43-1723446

(State or other jurisdiction
of incorporation)

(Commission
File Number)

(I.R.S. Employer

Identification No.)

1901 Chouteau Avenue, St. Louis, Missouri 63103

(Address of principal executive offices and Zip Code)

Registrant’s telephone number, including area code: (314) 621-3222

Check the appropriate box below if the Form 8-K filing is intended to simultaneously satisfy the filing obligation of the registrant 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 ¨

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. ¨

ITEM 8.01

Other Events.

On November 20, 2023, Ameren Corporation (“Ameren”) sold $600 million principal amount of its 5.70% Senior Notes due 2026 (the “Notes”). The Notes were offered pursuant to a Registration Statement on Form S-3 (File No. 333-274977), which became effective on October 13, 2023, and a Prospectus Supplement dated November 15, 2023, to a Prospectus dated October 13, 2023. Ameren received net offering proceeds of approximately $597.1 million, before expenses, upon closing of the transaction.

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

ITEM 9.01

Financial Statements and Exhibits.

(d)

Exhibits

Exhibit Number		Title

1		Underwriting Agreement, dated November 15, 2023, between Ameren and the several underwriters named therein, for whom Barclays Capital Inc., Goldman Sachs & Co. LLC, J.P. Morgan Securities LLC, Mizuho Securities USA LLC and Wells Fargo Securities, LLC are acting as representatives.

4.1*		Indenture, dated as of December 1, 2001, by and between Ameren and The Bank of New York Mellon Trust Company, N.A., as successor trustee, (“Ameren Indenture”) (Exhibit 4.5, File No. 333-81774).

4.2*		First Supplemental Indenture, dated as of May 19, 2008, to the Ameren Indenture (June 30, 2008 Form 10-Q, Exhibit 4.1, File No. 1-14756).

4.3		Company Order, dated November 20, 2023, establishing the Notes.

4.4		Global Notes.

5.1		Opinion of Chonda J. Nwamu, Esq., Executive Vice President, General Counsel and Secretary of Ameren, regarding the legality of the Notes (including consent).

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

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

Incorporated by reference as indicated.

SIGNATURES

Pursuant to the requirements of the Securities Exchange Act of 1934, Ameren has duly caused this report to be signed on its behalf by the undersigned hereunto duly authorized.

	AMEREN CORPORATION
	(Registrant)


	By:	/s/ Michael L. Moehn
	Name:	Michael L. Moehn
	Title:	Senior Executive Vice President and Chief Financial Officer

Date: November 20, 2023