[Form 4] Ameren Corporation Insider Trading Activity

Rhea-AI Filing Summary

Gwendolyn G. Mizell, listed as SVP & CSO of a subsidiary of Ameren Corporation (AEE), reported a transaction on Form 4 showing she sold 1,000 shares of Ameren common stock on 08/22/2025 at a price of $101.79 per share. After that disposition the filing reports 9,129 shares beneficially owned directly. The filing also discloses an indirect holding of 2,384 share equivalents in the Ameren Savings Investment Plan as of July 31, 2025, and notes 11 shares and 23 dividend equivalents acquired in Q2 2025 through reinvestment features. The Form 4 was signed by attorney-in-fact Jonathan T. Shade on 08/26/2025.

Positive

• Continued direct ownership of 9,129 shares after the sale indicates ongoing insider alignment with Ameren equity
• Indirect retirement-plan holdings of 2,384 share equivalents show participation in the company savings plan
• Dividend reinvestment activity (11 shares plus 23 dividend equivalents in Q2 2025) indicates retention of value from compensation

Negative

• Disposition of 1,000 shares on 08/22/2025 at $101.79 reduces the reporting person’s direct holdings

Insights

Corporate Governance Expert

TL;DR: Routine insider sale; ownership remains substantial and reinvestment activity shows continued alignment with company equity.

The reported sale of 1,000 shares at $101.79 appears to be a single open-market disposition rather than a transfer out of holdings or a resignation-related sale. The reporting person still holds 9,129 shares directly plus 2,384 share equivalents indirectly through the employee savings plan, indicating ongoing exposure to Ameren equity. The disclosure of dividend reinvestment and accrued dividend equivalents suggests continued participation in compensation and savings programs rather than complete divestment.

Securities Analyst

TL;DR: Transaction is a clear, dated insider sale with precise price and post-transaction ownership; not materially transformative for investors.

The Form 4 documents a specific sale on 08/22/2025 at $101.79 for 1,000 shares and reports post-transaction direct beneficial ownership of 9,129 shares. The filing provides supporting detail on indirect holdings and recent dividend reinvestment activity, which helps verify the composition of the reporting person’s holdings. Absent additional context on total outstanding holdings or planned sales, this single disposition is informative but not clearly material to Ameren’s capital structure.

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^*

Mizell Gwendolyn G

(Last) (First) (Middle)

1901 CHOUTEAU AVE

(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
	Officer (give title below)	X	Other (specify below)
			SVP & CSO of Subsidiary

3. Date of Earliest Transaction (Month/Day/Year)
08/22/2025

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								2,384(1)	I	By 401(K)
Common Stock, $.01 Par Value	08/22/2025		S		1,000	D	$101.79	9,129(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 July 31, 2025.

2. Amount includes 11 shares acquired during the second quarter of 2025 through reinvested dividends, as well as 23 accrued dividend equivalents acquired during the second quarter 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 Gwendolyn G. Mizell	08/26/2025
	** 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.
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FAQ

What did Ameren insider Gwendolyn G. Mizell report on Form 4 (AEE)?

The Form 4 reports a sale of 1,000 Ameren shares on 08/22/2025 at $101.79 per share and shows 9,129 shares beneficially owned directly after the sale.

How many share equivalents does Mizell hold in the Ameren Savings Investment Plan?

The filing discloses 2,384 estimated share equivalents held indirectly in the unitized stock fund of the Ameren Savings Investment Plan as of July 31, 2025.

Did the filing note any dividend reinvestment or restricted stock activity?

Yes. The filing states 11 shares were acquired via reinvested dividends in Q2 2025 and 23 accrued dividend equivalents were credited under restricted stock unit reinvestment features.

Who signed the Form 4 filing for Mizell and when?

The Form 4 was signed by attorney-in-fact Jonathan T. Shade on 08/26/2025.

What was the sale price per share reported on the Form 4?

The reported sale price was $101.79 per share for the 1,000-share disposition on 08/22/2025.