Ameren SVP awarded shares and stock units

Ameren Corporation senior vice president of a subsidiary, Eric V. Seidler, reported share awards and holdings changes dated February 5, 2026.

Rhea-AI Filing Summary

Ameren Corporation senior vice president of a subsidiary, Eric V. Seidler, reported share awards and holdings changes dated February 5, 2026. He received 1,066 restricted stock units under Ameren’s 2022 Omnibus Incentive Compensation Plan, scheduled to vest with a payment date no later than March 15, 2029.

He also acquired 2,364 common shares upon vesting of previously granted performance share units, both at a reported price of $0 per share. Following these transactions, he directly owned 15,023 Ameren shares, and indirectly held an estimated 1,789 share equivalents in the Ameren Corporation Savings Investment Plan as of January 31, 2026.

Insider Trade Summary

Grant/Award: 3,430 shares

Grant/Award 3 txns

Insider Seidler Eric V

Role SVP of Subsidiary

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, $.01 Par Value	1,066	$0.00	$0.00
Grant/Award	Common Stock, $.01 Par Value	2,364	$0.00	$0.00
holding	Common Stock, $.01 Par Value	--	--	--

Holdings After Transaction: Common Stock, $.01 Par Value — 15,023 shares (Direct); Common Stock, $.01 Par Value — 1,789 shares (Indirect, By 401(k))

Footnotes (4)

1. 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.
2. 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.
3. F3. Shares acquired upon vesting of previously-granted performance share units.
4. F4. Amount includes 17 shares acquired during the fourth quarter of 2025 through reinvested dividends, as well as 41 accrued dividend equivalents acquired during the fourth quarter of 2025 pursuant to a dividend reinvestment feature of restricted stock units granted under the Plan.

FAQ

What insider stock transactions did Ameren (AEE) report for Eric V. Seidler on February 5, 2026?

Ameren reported that Eric V. Seidler received 1,066 restricted stock units and 2,364 common shares on February 5, 2026. The shares came from performance share units vesting, and both awards were reported at a price of $0 per share as part of compensation.

How many Ameren (AEE) shares does Eric V. Seidler own after the February 2026 Form 4?

After the reported transactions, Eric V. Seidler directly owned 15,023 Ameren common shares. He also indirectly held an estimated 1,789 share equivalents in the Ameren Corporation Savings Investment Plan as of January 31, 2026, through a unitized stock fund in the company’s 401(k).

What are the terms of the Ameren (AEE) restricted stock units granted to Eric V. Seidler in 2026?

The 1,066 restricted stock units were granted under Ameren’s 2022 Omnibus Incentive Compensation Plan. They are scheduled to vest on a payment date in 2029, which will be no later than March 15, 2029, subject to the plan and the applicable award agreement.

How did Eric V. Seidler acquire 2,364 Ameren (AEE) shares reported on the Form 4?

The 2,364 Ameren common shares were acquired upon vesting of previously granted performance share units. These shares were reported as acquired at a price of $0 per share, reflecting equity compensation rather than an open-market purchase transaction.

What does the 1,789 Ameren (AEE) share equivalents in Eric V. Seidler’s 401(k) represent?

The 1,789 share equivalents represent an estimated interest in a unitized Ameren stock fund within the Ameren Corporation Savings Investment Plan. This figure is as of January 31, 2026, and reflects indirect ownership through the company’s 401(k) savings plan structure.

Did Eric V. Seidler’s Ameren (AEE) holdings include dividend reinvestments in 2025?

Yes. His reported amount includes 17 shares acquired in the fourth quarter of 2025 via reinvested dividends and 41 accrued dividend equivalents. These came from a dividend reinvestment feature tied to restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan.

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Accepted by SEC EDGAR 02/09/2026 - 08:41 PM Learn about SEC filing dates

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

OMB Number:			3235-0287
Estimated average burden
hours per response:			0.5

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^*

Seidler Eric V

(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 of Subsidiary

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								1,789(1)	I	By 401(k)
Common Stock, $.01 Par Value	02/05/2026		A		1,066(2)	A	$0	12,601	D
Common Stock, $.01 Par Value	02/05/2026		A		2,364(3)	A	$0	15,023(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 17 shares acquired during the fourth quarter of 2025 through reinvested dividends, as well as 41 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 Eric V. Seidler	02/09/2026
	** Signature of Reporting Person	Date
Reminder: Report on a separate line for each class of securities beneficially owned directly or indirectly.
* If the form is filed by more than one reporting person, see Instruction 4 (b)(v).
** Intentional misstatements or omissions of facts constitute Federal Criminal Violations See 18 U.S.C. 1001 and 15 U.S.C. 78ff(a).
Note: File three copies of this Form, one of which must be manually signed. If space is insufficient, see Instruction 6 for procedure.
Persons who respond to the collection of information contained in this form are not required to respond unless the form displays a currently valid OMB Number.