Theresa A. Shaw - 27 Feb 2026 Form 4 Insider Report for AMEREN CORP (AEE)

Role: SVP and CATO
Signature: Jonathan T. Shade, Deputy Corp. Secy. of Ameren Corporation, attorney-in-fact for Theresa A. Shaw
Issuer symbol: AEE
Transactions as of: 27 Feb 2026
Net transactions value: -$146,811
Form type: 4
Filing time: 03 Mar 2026, 16:46:56 UTC
Previous filing: 19 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Shaw Theresa A	SVP and CATO	1901 CHOUTEAU AVENUE, P.O. BOX 66149, ST. LOUIS	Jonathan T. Shade, Deputy Corp. Secy. of Ameren Corporation, attorney-in-fact for Theresa A. Shaw	03 Mar 2026	0001878241

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEE	Common Stock, $.01 Par Value	Tax liability	$146,811	-1,296	-3.6%	$113.28	34,397	27 Feb 2026	Direct	F2
holding	AEE	Common Stock, $.01 Par Value						897	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.