Ameren (AEE) SVP Finance reports 726-share tax withholding on equity vesting

Rhea-AI Filing Summary

Ameren Corp senior vice president reports routine share withholding for taxes. On the vesting of performance share units and restricted stock units, 726 shares of common stock were withheld by the company at a price of $113.28 per share to cover tax obligations. After this tax-withholding disposition, Ryan J. Martin directly holds 27,779 Ameren common shares and has an additional estimated 1,789 share equivalents held indirectly through the Ameren Corporation Savings Investment Plan as of February 28, 2026.

Insider Trade Summary

2 transactions reported

Mixed 2 txns

Insider Martin Ryan J

Role SVP Finance

Type	Security	Shares	Price	Value
Tax Withholding	Common Stock, $.01 Par Value	726	$113.28	$82K
holding	Common Stock, $.01 Par Value	--	--	--

Holdings After Transaction: Common Stock, $.01 Par Value — 27,779 shares (Direct); Common Stock, $.01 Par Value — 1,789 shares (Indirect, By 401(k))

Footnotes (1)

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. Shares withheld by the issuer to satisfy tax withholding obligations arising in connection with the vesting of performance share units and restricted stock units.

Form 4 Insider Transactions: What Each Field Means →

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^*

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)
02/27/2026

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	02/27/2026		F		726	D	$113.28	27,779(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. 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.

2. Shares withheld by the issuer to satisfy tax withholding obligations arising in connection with the vesting of performance share units and restricted stock units.

Remarks:

	Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Ryan J. Martin	03/03/2026
	** 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 did Ameren (AEE) executive Ryan J. Martin report in this Form 4?

Ryan J. Martin reported a tax-related share disposition. Ameren withheld 726 common shares to satisfy tax obligations from vesting performance share units and restricted stock units, a routine, non-open-market transaction commonly used to cover income tax liabilities on equity compensation.

How many Ameren (AEE) shares were withheld for Ryan J. Martin’s taxes?

Ameren withheld 726 common shares for taxes. The withholding occurred in connection with the vesting of performance share units and restricted stock units, and was priced at $113.28 per share, according to the Form 4 filed for senior vice president of finance Ryan J. Martin.

Is Ryan J. Martin’s Ameren (AEE) Form 4 a market sale of shares?

No, the Form 4 reflects a tax-withholding disposition, not an open-market sale. Shares were withheld by Ameren to satisfy tax obligations tied to vesting equity awards, a standard administrative process rather than a discretionary sale on the stock market.

How many Ameren (AEE) shares does Ryan J. Martin hold after this transaction?

After the tax-withholding transaction, Ryan J. Martin directly holds 27,779 Ameren common shares. He also has an estimated 1,789 share equivalents indirectly through the Ameren Corporation Savings Investment Plan as of February 28, 2026, according to the filing footnote.

What indirect Ameren (AEE) holdings does Ryan J. Martin report in the Form 4?

The Form 4 shows an estimated 1,789 share equivalents held indirectly through the Ameren Corporation Savings Investment Plan. These are unitized stock fund holdings in a 401(k)-type plan, reported as of February 28, 2026, and are separate from Martin’s directly held Ameren shares.