Mark C. Lindgren - 05 Feb 2026 Form 4 Insider Report for AMEREN CORP (AEE)

Role: EVP & Chief HR Officer of Sub
Signature: Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Mark C. Lindgren
Issuer symbol: AEE
Transactions as of: 05 Feb 2026
Net transactions value: $0
Form type: 4
Filing time: 09 Feb 2026, 20:42:05 UTC
Previous filing: 15 Sep 2025
Next filing: 03 Mar 2026
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
Lindgren Mark C	EVP & Chief HR Officer of Sub	P.O. BOX 66149, ST. LOUIS	Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Mark C. Lindgren	09 Feb 2026	0001640852

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AEE	Common Stock, $.01 Par Value	Award	$0	+2,082	+4.9%	$0.000000	44,656	05 Feb 2026	Direct	F2
transaction	AEE	Common Stock, $.01 Par Value	Award	$0	+4,349	+9.7%	$0.000000	49,099	05 Feb 2026	Direct	F3, F4
holding	AEE	Common Stock, $.01 Par Value						1,731	05 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 January 31, 2026.
F2	These restricted stock units were granted under the issuer's 2022 Omnibus Incentive Compensation Plan (the "Plan") and are scheduled to vest upon the payment date in 2029, which shall be no later than March 15, 2029, subject to the terms of the Plan and the applicable award agreement issued thereunder.
F3	Shares acquired upon vesting of previously-granted performance share units.
F4	Amount includes 94 accrued dividend equivalents acquired during the third through fourth quarters of 2025 pursuant to a dividend reinvestment feature of restricted stock units granted under the Plan.