Exhibit 5.1
April 3, 2020
Ameren Corporation
1901 Chouteau Avenue
St. Louis, Missouri 63103
Ladies and Gentlemen:
I am Senior Corporate Counsel of Ameren Services Company, a subsidiary of Ameren Corporation, a Missouri corporation (the “Company”). The Company has filed with the Securities and Exchange Commission (the “Commission”) a Registration Statement onForm S-3 (RegistrationNo. 333-222108) (the “Registration Statement”) under the Securities Act of 1933, as amended (the “Securities Act”), with respect to the registration of an indeterminate amount of securities, which became effective on December 15, 2017. On April 3, 2020, the Company issued and sold $800,000,000 principal amount of its 3.50% Senior Notes due 2031 (the “Notes”) under an Indenture, dated as of December 1, 2001, between the Company and The Bank of New York Mellon Trust Company, N.A. (as successor to The Bank of New York), as trustee (the “Trustee”), as amended and supplemented (the “Indenture”).
In connection with the issuance and sale of the Notes by the Company, I have reviewed originals (or copies certified or otherwise identified to my satisfaction) of (1) the Registration Statement; (2) a prospectus dated December 15, 2017 (the “Base Prospectus”) forming a part of the Registration Statement, as supplemented by a prospectus supplement dated March 31, 2020 (the “Prospectus Supplement”) relating to the Notes, both such Base Prospectus and Prospectus Supplement filed pursuant to Rule 424 under the Securities Act; (3) the Company’s Restated Articles of Incorporation, as amended, and the Company’sBy-Laws, as amended, each as in effect on the date hereof; (4) the Indenture; (5) a specimen of the Notes; and (6) corporate and other documents, records and papers and certificates of public officials. In addition, I have reviewed such other documents and materials as I have deemed necessary or appropriate for purposes of this opinion. In connection with such review, I have assumed the genuineness of all signatures, the legal capacity of natural persons, the conformity to the originals of the documents submitted to me as certified or photostatic copies, the authenticity of the originals of such documents and all documents submitted to me as originals and the correctness of all statements of fact contained in such original documents. I have relied upon a certificate of the Trustee as to the authentication and delivery of the Notes under the Indenture.
On the basis of such review, I am of the opinion that the Notes are the valid and legally binding obligations of the Company, except as may be limited by bankruptcy, insolvency, fraudulent conveyance, reorganization, moratorium and other similar laws affecting creditors’ rights
