AMEREN CORP

For the period ended Sep 30, 2026. Filed Nov 6, 2026.

About this filing

A company's report for each of its first three quarters. The financial statements are not audited. It shows how the business has moved since the last annual report, and what management says changed.

Sep 30, 2026 · Filed Nov 6, 2026

AEE$114.02+1.0%Stored close · as of Nov 9, 2026

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Contents

Signatures

Pursuant to the requirements of the Exchange Act, each registrant has duly caused this report to be signed on its behalf by the undersigned thereunto duly authorized. The signature for each undersigned company shall be deemed to relate only to matters having reference to such company or its subsidiaries.

AMEREN CORPORATION(Registrant)

/s/ Leonard P. Singh

Leonard P. SinghExecutive Vice President and Chief Financial Officer (Principal Financial Officer)

UNION ELECTRIC COMPANY(Registrant)

/s/ Leonard P. Singh

Leonard P. SinghExecutive Vice President and Chief Financial Officer (Principal Financial Officer)

AMEREN ILLINOIS COMPANY(Registrant)

/s/ Leonard P. Singh

Leonard P. SinghExecutive Vice President and Chief Financial Officer (Principal Financial Officer)

Date: November 6, 2026

ContentsView on SEC.gov

The text of this filing, as the company filed it with the SEC, without its images or exhibits. This is not investment advice.