Ameren Corp (AEE) finance SVP sells 1,300 shares in open market

Rhea-AI Filing Summary

Ameren Corp senior vice president of finance Ryan J. Martin sold common stock in an open-market transaction. On March 4, 2026, he sold 1,300 shares of Ameren common stock at an average price of $113.31 per share. After this sale, he directly owned 26,479 shares. He also held an estimated 1,789 share equivalents indirectly through a 401(k) unitized stock fund as of February 28, 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

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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)
03/04/2026

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	03/04/2026		S		1,300	D	$113.31	26,479	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 February 28, 2026.

Remarks:

	Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Ryan J. Martin	03/06/2026
	** 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 Corp (AEE) report for Ryan J. Martin?

Ameren Corp reported that senior vice president of finance Ryan J. Martin executed an open-market sale of 1,300 shares of common stock on March 4, 2026, at $113.31 per share. This Form 4 filing reflects a discretionary insider sale rather than an option exercise.

How many Ameren (AEE) shares did Ryan J. Martin sell and at what price?

Ryan J. Martin sold 1,300 shares of Ameren common stock at an average price of $113.31 per share on March 4, 2026. This open-market sale reduced his direct holdings but left him with a sizable remaining position reported in the filing.

What are Ryan J. Martin’s Ameren (AEE) share holdings after this Form 4 sale?

Following the reported transaction, Ryan J. Martin directly owned 26,479 Ameren common shares. In addition, the filing notes an estimated 1,789 share equivalents held indirectly through a unitized Ameren stock fund in the company’s Savings Investment Plan as of February 28, 2026.

Does the Ameren (AEE) Form 4 include shares held in a 401(k) plan?

Yes. The Form 4 discloses an estimated 1,789 share equivalents held indirectly via a unitized Ameren stock fund in the Ameren Corporation Savings Investment Plan. This figure reflects his 401(k) position as of February 28, 2026, separate from his directly owned common shares.

Is the insider transaction in Ameren (AEE) stock a purchase or a sale?

The disclosed insider transaction is a sale. Ryan J. Martin, Ameren’s senior vice president of finance, executed an open-market sale of 1,300 common shares at $113.31 per share on March 4, 2026, as indicated by transaction code “S” in the Form 4 filing.