[Form 4] AMEREN CORP Insider Trading Activity

Rhea-AI Filing Summary

Ameren Corp (AEE) officer Theresa A. Shaw reported an equity award and updated holdings. On 10/09/2025, she acquired 2,411 restricted stock units at $0 under the 2022 Omnibus Incentive Compensation Plan. These RSUs are scheduled to vest upon the payment date in 2029, which shall be no later than November 15, 2029, subject to plan terms.

Following the reported transaction, Shaw directly owned 33,267 shares of Ameren common stock. The reported amount includes 92 accrued dividend equivalents acquired during the first through third quarters of 2025. She also held 884 share equivalents indirectly in the Ameren Corporation Savings Investment Plan as of September 30, 2025.

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).

1. Name and Address of Reporting Person^*

Shaw Theresa A

(Last) (First) (Middle)

1901 CHOUTEAU AVENUE

P.O. BOX 66149

(Street)

ST. 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 and CAO

3. Date of Earliest Transaction (Month/Day/Year)
10/09/2025

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								884(1)	I	By 401(k)
Common Stock, $.01 Par Value	10/09/2025		A		2,411(2)	A	$0	33,267(3)	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 September 30, 2025.

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 November 15, 2029, subject to the terms of the Plan and the applicable award agreement issued thereunder.

3. Amount includes 92 accrued dividend equivalents acquired during the first through third quarters of 2025 pursuant to a dividend reinvestment feature of restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan.

Remarks:

	Jonathan T. Shade, Deputy Corp. Secy. of Ameren Corporation, attorney-in-fact for Theresa A. Shaw	10/14/2025
	** 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.

FAQ

What did Ameren (AEE) disclose about Theresa A. Shaw's equity award?

She acquired 2,411 restricted stock units on 10/09/2025 at $0 under the 2022 Omnibus Incentive Compensation Plan.

When do the newly granted RSUs for AEE vest?

They are scheduled to vest upon the payment date in 2029, no later than November 15, 2029, per the plan and award agreement.

How many AEE shares did Shaw own directly after the transaction?

She directly owned 33,267 shares following the reported transaction.

Does Shaw have indirect holdings of AEE stock?

Yes. She held 884 share equivalents in the Ameren Corporation Savings Investment Plan as of September 30, 2025.

Were dividend equivalents included in the reported AEE holdings?

Yes. The amount includes 92 accrued dividend equivalents from the first through third quarters of 2025.

What is Shaw’s role at Ameren (AEE)?

She is an Officer, serving as SVP, Finance and CAO.