Ameren (AEE) director Mackay reports 1,686-share stock award and 11,834 total holdings

Rhea-AI Filing Summary

Ameren Corp director Leo S. Mackay Jr. reported receiving 1,686 shares of Ameren common stock on January 5, 2026 as an award classified as director compensation. The shares were acquired at a stated price of $0 per share, indicating they were granted rather than purchased on the open market. Following this grant, he beneficially owns 11,834 Ameren shares in total on a direct basis. This total includes 283 shares accumulated during the first through fourth quarters of 2025 through reinvested dividends.

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

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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^*

Mackay Leo S. Jr.

(Last) (First) (Middle)

1901 CHOUTEAU AVENUE, MC 1310

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)

X	Director		10% Owner
	Officer (give title below)		Other (specify below)

3. Date of Earliest Transaction (Month/Day/Year)
01/05/2026

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	01/05/2026		A		1,686(1)	A	$0	11,834(2)	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. Director compensation.

2. Amount includes a total of 283 shares acquired during the first through fourth quarters of 2025 through reinvested dividends.

Remarks:

	Jonathan T. Shade, Deputy Corp. Secy. of Ameren Corporation, attorney-in-fact for Leo S. Mackay, Jr.	01/07/2026
	** 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.

FAQ

What insider transaction did Ameren (AEE) report for Leo S. Mackay Jr.?

Ameren reported that director Leo S. Mackay Jr. acquired 1,686 shares of Ameren common stock on January 5, 2026, coded as an A transaction (acquisition).

At what price were the 1,686 Ameren (AEE) shares acquired by the director?

The 1,686 shares of Ameren common stock were acquired at a stated price of $0 per share, consistent with a stock grant rather than an open-market purchase.

How many Ameren (AEE) shares does Leo S. Mackay Jr. own after this transaction?

After the reported grant, Leo S. Mackay Jr. beneficially owns 11,834 shares of Ameren common stock, held in direct ownership form.

What is the reason given for the Ameren (AEE) stock grant to the director?

The filing notes that the 1,686-share acquisition represents director compensation, indicating the shares were issued as part of his board compensation.

How were dividend reinvestments reflected in this Ameren (AEE) Form 4?

The total holding of 11,834 shares includes 283 shares that were acquired during the first through fourth quarters of 2025 through reinvested dividends.

Is the Ameren (AEE) director’s ownership reported as direct or indirect?

The Form 4 reports the 11,834 shares of Ameren common stock as held under direct (D) ownership, with no separate indirect ownership entity listed.