Gwendolyn G. Mizell - 27 Feb 2026 Form 4 Insider Report for AMEREN CORP (AEE)

Role: SVP & CSO of Subsidiary
Signature: Jonathan T. Shade, Deputy Corp. Secy. of Ameren Corporation, attorney-in-fact for Gwendolyn G. Mizell
Issuer symbol: AEE
Transactions as of: 27 Feb 2026
Net transactions value: -$106,823
Form type: 4
Filing time: 03 Mar 2026, 16:46:38 UTC
Previous filing: 19 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Mizell Gwendolyn G	SVP & CSO of Subsidiary	1901 CHOUTEAU AVE, ST LOUIS	Jonathan T. Shade, Deputy Corp. Secy. of Ameren Corporation, attorney-in-fact for Gwendolyn G. Mizell	03 Mar 2026	0001849779

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEE	Common Stock, $.01 Par Value	Tax liability	$106,823	-943	-13%	$113.28	6,324	27 Feb 2026	Direct	F2
holding	AEE	Common Stock, $.01 Par Value						2,424	27 Feb 2026	By 401(K)	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents the estimated number of share equivalents held by the reporting person in the unitized stock fund included in the Ameren Corporation Savings Investment Plan as of February 28, 2026.
F2	Shares withheld by the issuer to satisfy tax withholding obligations arising in connection with the vesting of performance share units and restricted stock units.