Ameren (NYSE: AEE) EVP Lindgren awarded RSUs and performance-based shares

Rhea-AI Filing Summary

Ameren Corporation executive Mark C. Lindgren reported new equity awards and share vesting. On February 5, 2026, he acquired 2,082 restricted stock units at $0 under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest by a payment date no later than March 15, 2029.

On the same date, he also acquired 4,349 common shares at $0 upon vesting of previously granted performance share units, including 94 dividend-equivalent shares. After these transactions, he directly held 49,099 Ameren common shares and indirectly held 1,731 share equivalents through the Ameren Corporation Savings Investment Plan as of January 31, 2026.

SEC Form 4

FORM 4

UNITED STATES SECURITIES AND EXCHANGE COMMISSION
Washington, D.C. 20549

STATEMENT OF CHANGES IN BENEFICIAL OWNERSHIP

Filed pursuant to Section 16(a) of the Securities Exchange Act of 1934
or Section 30(h) of the Investment Company Act of 1940

OMB APPROVAL

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Check this box if no longer subject to Section 16. Form 4 or Form 5 obligations may continue. See Instruction 1(b).

Check this box to indicate that a transaction was made pursuant to a contract, instruction or written plan for the purchase or sale of equity securities of the issuer that is intended to satisfy the affirmative defense conditions of Rule 10b5-1(c). See Instruction 10.

1. Name and Address of Reporting Person^*

Lindgren Mark C

(Last) (First) (Middle)

P.O. BOX 66149

(Street)

ST. LOUIS MO 63166-6149

(City) (State) (Zip)

2. Issuer Name and Ticker or Trading Symbol
AMEREN CORP [ AEE ]

5. Relationship of Reporting Person(s) to Issuer
(Check all applicable)

	Director		10% Owner
	Officer (give title below)	X	Other (specify below)
			EVP & Chief HR Officer of Sub

3. Date of Earliest Transaction (Month/Day/Year)
02/05/2026

4. If Amendment, Date of Original Filed (Month/Day/Year)

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

Table I - Non-Derivative Securities Acquired, Disposed of, or Beneficially Owned
1. Title of Security (Instr. 3)	2. Transaction Date (Month/Day/Year)	2A. Deemed Execution Date, if any (Month/Day/Year)	3. Transaction Code (Instr. 8)		4. Securities Acquired (A) or Disposed Of (D) (Instr. 3, 4 and 5)			5. Amount of Securities Beneficially Owned Following Reported Transaction(s) (Instr. 3 and 4)	6. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	7. Nature of Indirect Beneficial Ownership (Instr. 4)
			Code	V	Amount	(A) or (D)	Price
Common Stock, $.01 Par Value								1,731(1)	I	By 401(K)
Common Stock, $.01 Par Value	02/05/2026		A		2,082(2)	A	$0	44,656	D
Common Stock, $.01 Par Value	02/05/2026		A		4,349(3)	A	$0	49,099(4)	D

Table II - Derivative Securities Acquired, Disposed of, or Beneficially Owned (e.g., puts, calls, warrants, options, convertible securities)
1. Title of Derivative Security (Instr. 3)	2. Conversion or Exercise Price of Derivative Security	3. Transaction Date (Month/Day/Year)	3A. Deemed Execution Date, if any (Month/Day/Year)	4. Transaction Code (Instr. 8)		5. Number of Derivative Securities Acquired (A) or Disposed of (D) (Instr. 3, 4 and 5)		6. Date Exercisable and Expiration Date (Month/Day/Year)		7. Title and Amount of Securities Underlying Derivative Security (Instr. 3 and 4)		8. Price of Derivative Security (Instr. 5)	9. Number of derivative Securities Beneficially Owned Following Reported Transaction(s) (Instr. 4)	10. Ownership Form: Direct (D) or Indirect (I) (Instr. 4)	11. Nature of Indirect Beneficial Ownership (Instr. 4)
				Code	V	(A)	(D)	Date Exercisable	Expiration Date	Title	Amount or Number of Shares

Explanation of Responses:

1. 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.

2. 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.

3. Shares acquired upon vesting of previously-granted performance share units.

4. 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.

Remarks:

	Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Mark C. Lindgren	02/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
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** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
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FAQ

What insider transaction did Mark C. Lindgren report for Ameren (AEE)?

Mark C. Lindgren reported acquiring equity awards in Ameren common stock. On February 5, 2026, he received 2,082 restricted stock units and 4,349 common shares at $0 per share, tied to Ameren’s 2022 Omnibus Incentive Compensation Plan and previously granted performance share units.

How many Ameren (AEE) shares does Mark C. Lindgren hold after this Form 4?

After the reported transactions, Mark C. Lindgren directly held 49,099 Ameren common shares. He also indirectly held 1,731 share equivalents through the unitized stock fund in the Ameren Corporation Savings Investment Plan, based on plan holdings as of January 31, 2026.

What are the terms of the 2,082 restricted stock units granted to Lindgren at Ameren (AEE)?

The 2,082 restricted stock units were granted under Ameren’s 2022 Omnibus Incentive Compensation Plan. They are scheduled to vest upon a payment date in 2029, which will occur no later than March 15, 2029, subject to plan terms and the applicable award agreement.

What is the origin of the 4,349 Ameren (AEE) shares acquired by Lindgren?

The 4,349 Ameren common shares were acquired upon vesting of previously granted performance share units. This amount includes 94 accrued dividend-equivalent shares from the third through fourth quarters of 2025, credited under the dividend reinvestment feature of restricted stock units granted under the plan.

How are Lindgren’s indirect Ameren (AEE) holdings structured in this Form 4?

Lindgren’s indirect holdings consist of 1,731 share equivalents in a unitized stock fund. These are held through the Ameren Corporation Savings Investment Plan, a 401(k) arrangement, and represent an estimated number of share equivalents as of January 31, 2026.

What role does Mark C. Lindgren hold in relation to Ameren (AEE)?

Mark C. Lindgren is identified as an "EVP & Chief HR Officer of Sub" in relation to Ameren. This indicates he serves as an executive vice president and chief human resources officer of a subsidiary within the Ameren corporate structure, rather than as a director or 10% owner.