Eric Seidler V. - 27 Feb 2026 Form 4 Insider Report for AMEREN CORP (AEE)

Role: SVP of Subsidiary
Signature: Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Eric V. Seidler
Issuer symbol: AEE
Transactions as of: 27 Feb 2026
Net transactions value: -$111,241
Form type: 4
Filing time: 03 Mar 2026, 16:46:18 UTC
Previous filing: 09 Feb 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Seidler Eric V	SVP of Subsidiary	1901 CHOUTEAU AVENUE, SAINT LOUIS	Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Eric V. Seidler	03 Mar 2026	0002093862

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEE	Common Stock, $.01 Par Value	Tax liability	$111,241	-982	-6.5%	$113.28	14,041	27 Feb 2026	Direct	F2
holding	AEE	Common Stock, $.01 Par Value						1,793	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.