Ameren (NYSE: AEE) SVP Finance reports new stock and RSU awards

Rhea-AI Filing Summary

Ameren Corporation SVP Finance Ryan J. Martin reported equity awards and holdings in company stock. On February 5, 2026, he acquired 1,294 shares of Ameren common stock at $0 per share in the form of restricted stock units granted under the 2022 Omnibus Incentive Compensation Plan, which are scheduled to vest by March 15, 2029. He also acquired 1,752 shares of common stock upon vesting of previously granted performance share units, bringing his directly held Ameren common stock to 28,505 shares, including 42 dividend-equivalent shares accrued in the fourth quarter of 2025. Separately, he indirectly holds an estimated 1,788 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^*

Martin Ryan J

(Last) (First) (Middle)

1901 CHOUTEAU AVENUE

(Street)

SAINT LOUIS MO 63103

(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
X	Officer (give title below)		Other (specify below)
	SVP Finance

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								1,788(1)	I	By 401(k)
Common Stock, $.01 Par Value	02/05/2026		A		1,294(2)	A	$0	26,711	D
Common Stock, $.01 Par Value	02/05/2026		A		1,752(3)	A	$0	28,505(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 42 accrued dividend equivalents acquired during the fourth quarter 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 Ryan J. Martin	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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FAQ

What insider transaction did Ameren (AEE) SVP Finance Ryan J. Martin report?

Ryan J. Martin reported acquiring Ameren common stock through equity awards. On February 5, 2026, he received 1,294 restricted stock units at $0 per share and 1,752 shares from vesting performance share units, increasing his directly held Ameren common stock to 28,505 shares.

How many Ameren (AEE) shares does Ryan J. Martin now hold directly and indirectly?

After the reported transactions, Ryan J. Martin directly holds 28,505 shares of Ameren common stock. He also indirectly holds an estimated 1,788 share equivalents in the Ameren Corporation Savings Investment Plan as of January 31, 2026, reflecting his retirement-plan exposure to Ameren stock.

What are the terms of the restricted stock units granted to Ameren (AEE) SVP Finance?

The 1,294 restricted stock units granted to Ryan J. Martin were issued under Ameren’s 2022 Omnibus Incentive Compensation Plan. They are scheduled to vest on a payment date in 2029, no later than March 15, 2029, subject to the plan and award agreement terms.

How did Ryan J. Martin acquire additional Ameren (AEE) shares on February 5, 2026?

On February 5, 2026, Ryan J. Martin acquired 1,752 Ameren common shares upon vesting of previously granted performance share units. This vesting, combined with earlier awards, raised his directly held Ameren stock to 28,505 shares following the reported transactions on that date.

What does the Ameren (AEE) Form 4 say about dividend equivalents for Ryan J. Martin?

The filing notes that his 28,505 directly held Ameren shares include 42 accrued dividend equivalents. These were acquired in the fourth quarter of 2025 through a dividend reinvestment feature tied to restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan.

How are Ameren (AEE) shares held through the 401(k) plan reported for Ryan J. Martin?

The Form 4 shows 1,788 estimated share equivalents indirectly owned by Ryan J. Martin through a unitized stock fund in the Ameren Corporation Savings Investment Plan. This amount is reported as of January 31, 2026, and reflects his 401(k) plan’s Ameren stock exposure.