Ameren SVP Finance sells 971 shares at ~$110

AMEREN CORP (AEE) reported that Ryan J. Martin, SVP Finance, sold a total of 971 shares of common stock in open-market transactions, consisting of 500 shares at $109.88 on August 20, 2026 and 471 shares at $109.87 on August 18, 2026, all held directly.

Rhea-AI Filing Summary

AMEREN CORP (AEE) reported that Ryan J. Martin, SVP Finance, sold a total of 971 shares of common stock in open-market transactions, consisting of 500 shares at $109.88 on August 20, 2026 and 471 shares at $109.87 on August 18, 2026, all held directly. The filing also reports an indirect holding of 1,837 share equivalents in a unitized stock fund within the Ameren Corporation Savings Investment Plan as of July 31, 2026, and notes that reported amounts include 87 dividend equivalents accrued under restricted stock units granted pursuant to Ameren’s 2022 Omnibus Incentive Compensation Plan.

Insider Trade Summary

Net Seller: 971 shares

Net Sell 3 txns

Insider Martin Ryan J

Role SVP Finance

Sold 971 shs ($107K)

Type	Security	Shares	Price	Value
Sale	Common Stock, $.01 Par Value F2	500	$109.88	$55K
Sale	Common Stock, $.01 Par Value	471	$109.87	$52K
holding	Common Stock, $.01 Par Value F1	--	--	--

Holdings After Transaction: Common Stock, $.01 Par Value — 25,595 shares (Direct); Common Stock, $.01 Par Value — 1,837 shares (Indirect, By 401(k))

Footnotes (2)

1. F1. 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, 2026.
2. F2. Amount includes 87 accrued dividend equivalents acquired during the first and second quarters of 2026 pursuant to a dividend reinvestment feature of restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan.

Key Figures

Shares sold August 20, 2026: 500 shares at $109.88 per share Shares sold August 18, 2026: 471 shares at $109.87 per share Total shares sold: 971 shares +2 more

5 metrics

Shares sold August 20, 2026 500 shares at $109.88 per share Open-market sale of Ameren common stock by SVP Finance Ryan J. Martin

Shares sold August 18, 2026 471 shares at $109.87 per share Open-market sale of Ameren common stock by SVP Finance Ryan J. Martin

Total shares sold 971 shares Aggregate of reported open-market sales on August 18 and 20, 2026

Indirect share equivalents in Savings Investment Plan 1,837 share equivalents Estimated number of Ameren share equivalents in unitized stock fund as of July 31, 2026

Accrued dividend equivalents 87 dividend equivalents Acquired during first and second quarters of 2026 via dividend reinvestment on restricted stock units

Key Terms

unitized stock fund, dividend equivalents, Omnibus Incentive Compensation Plan

3 terms

unitized stock fund financial

"estimated number of share equivalents held by the reporting person in the unitized stock fund"

dividend equivalents financial

"includes 87 accrued dividend equivalents acquired during the first and second quarters"

Payments tied to employee or contractor equity awards that mirror the cash dividends paid on the company’s stock; they give the holder the same economic benefit as owning the shares without transferring actual shares—often paid in cash or additional award units when the award becomes payable. Investors care because these payments affect a company’s compensation costs, cash flow and potential share dilution, and they signal how management is being rewarded and aligned with shareholders.

Omnibus Incentive Compensation Plan financial

"granted under the issuer's 2022 Omnibus Incentive Compensation Plan"

An omnibus incentive compensation plan is a single, flexible program that lets a company grant different kinds of pay — such as cash bonuses, stock options, restricted stock, or performance awards — to employees, executives and directors. Investors care because the plan affects how much ownership can be given away (dilution), how much the company spends on pay, and whether executives’ goals are aligned with shareholders, much like a menu that decides what rewards staff can pick and how costly they are.

FAQ

AI-generated questions and answers. How Rhea-AI works. Not financial advice.

What insider transactions did AMEREN CORP (AEE) report for Ryan J. Martin?

The filing reports that SVP Finance Ryan J. Martin sold a total of 971 shares of Ameren common stock in two open-market sales on August 18 and 20, 2026, and also discloses indirect holdings in the company’s savings investment plan.

How many AEE shares did Ryan J. Martin sell and at what prices?

Ryan J. Martin sold 500 shares at $109.88 per share on August 20, 2026 and 471 shares at $109.87 per share on August 18, 2026, for a total of 971 shares of Ameren common stock sold.

Were the reported AEE insider sales made under a Rule 10b5-1 trading plan?

No. The Rule 10b5-1 checkbox is not marked as affirmative for this filing, and there is no footnote stating that the reported sales by Ryan J. Martin were made pursuant to a Rule 10b5-1 trading plan.

What indirect Ameren (AEE) holdings does Ryan J. Martin report?

Ryan J. Martin reports 1,837 share equivalents held indirectly through a unitized stock fund in the Ameren Corporation Savings Investment Plan as of July 31, 2026, which represent estimated share equivalents rather than directly held shares.

What are the 87 dividend equivalents referenced in the AEE Form 4 footnote?

A footnote explains that reported amounts include 87 accrued dividend equivalents acquired during the first and second quarters of 2026 via a dividend reinvestment feature of restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan.

AI-generated analysis. How Rhea-AI works. Not financial advice.

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Available on EDGAR 08/20/2026 - 04:48 PM Accepted by SEC EDGAR 08/20/2026 - 04:48 PM Learn about SEC filing dates

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 MISSOURI 63103

(City) (State) (Zip)

UNITED STATES

(Country)

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

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
08/18/2026

6. Individual or Joint/Group Filing (Check Applicable Line)

X	Form filed by One Reporting Person
	Form filed by More than One Reporting Person

4. If Amendment, Date of Original Filed (Month/Day/Year)

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								1,837(1)	I	By 401(k)
Common Stock, $.01 Par Value	08/18/2026		S		471	D	$109.87	26,008	D
Common Stock, $.01 Par Value	08/20/2026		S		500	D	$109.88	25,595(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, 2026.

2. Amount includes 87 accrued dividend equivalents acquired during the first and second quarters of 2026 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. for Ameren Corporation, attorney-in-fact for Ryan J. Martin	08/20/2026
	** 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.
* Form 4: SEC 1474 (03-26)