Insider Theresa Shaw (NYSE: AEE) gets stock, units vest

Rhea-AI Filing Summary

Ameren Corporation senior vice president and chief accounting and tax officer Theresa A. Shaw reported new equity awards and updated holdings. On 02/05/2026 she received 1,333 restricted stock units under Ameren's 2022 Omnibus Incentive Compensation Plan, scheduled to vest on a payment date in 2029, no later than March 15, 2029.

She also acquired 3,126 shares of common stock upon vesting of previously granted performance share units, with both awards priced at $0 per share. After these transactions, she directly owned 36,018 Ameren common shares, and indirectly held an estimated 895 share equivalents in the Ameren Corporation Savings Investment Plan as of January 31, 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

OMB APPROVAL

OMB Number:			3235-0287
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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^*

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 and CATO

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								895(1)	I	By 401(k)
Common Stock, $.01 Par Value	02/05/2026		A		1,333(2)	A	$0	32,843	D
Common Stock, $.01 Par Value	02/05/2026		A		3,126(3)	A	$0	36,018(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 48 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. of Ameren Corporation, attorney-in-fact for Theresa A. Shaw	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.

FAQ

What insider transactions did Ameren (AEE) report for Theresa A. Shaw?

Theresa A. Shaw reported acquisitions of Ameren common stock and stock units. On February 5, 2026, she received 1,333 restricted stock units and 3,126 shares from vesting performance share units, both at $0 per share, increasing her directly held Ameren common shares.

How many Ameren shares does Theresa A. Shaw own after the reported Form 4?

After the transactions, Theresa A. Shaw directly owns 36,018 Ameren shares. In addition, she indirectly holds an estimated 895 share equivalents in the unitized stock fund of the Ameren Corporation Savings Investment Plan as of January 31, 2026.

What are the terms of Theresa A. Shaw’s new Ameren restricted stock units?

Shaw received 1,333 restricted stock units under Ameren’s 2022 Omnibus Incentive Compensation Plan. These units are scheduled to vest on a payment date in 2029, which must occur no later than March 15, 2029, subject to the plan and award agreement terms.

What is the source of the 3,126 Ameren shares acquired by Theresa A. Shaw?

The 3,126 Ameren shares came from vesting performance share units. The filing explains these shares were acquired upon vesting of previously granted performance share units, and they were reported as acquired at a price of $0 per share.

How are Theresa A. Shaw’s Ameren 401(k) holdings reported in this Form 4?

The filing reports 895 share equivalents held through Ameren’s savings plan. This represents an estimated number of share equivalents in the unitized stock fund within the Ameren Corporation Savings Investment Plan as of January 31, 2026, reported as indirectly owned.

What role does Theresa A. Shaw hold at Ameren (AEE) in this insider report?

Theresa A. Shaw is reported as Ameren’s SVP and CATO. The filing identifies her as a senior vice president and chief accounting and tax officer of Ameren Corporation, making these transactions reportable insider activities under Section 16 rules.