Ameren chair granted 3,705 restricted stock units

Melda Aaron P reported acquisition or exercise transactions in this Form 4 filing.

Rhea-AI Filing Summary

Melda Aaron P reported acquisition or exercise transactions in this Form 4 filing.

AMEREN CORP Chairman and President P. Melda Aaron received an equity grant of 3,705 restricted stock units of common stock. The grant was made at a stated price of $0.00 per share as compensation, not an open-market purchase.

The restricted stock units were granted under Ameren’s 2022 Omnibus Incentive Compensation Plan and will vest in two equal installments on March 1, 2027 and March 1, 2028, subject to the plan and the applicable award agreement. Following this grant, Aaron directly holds 3,705 shares or units reported in this filing.

Insider Trade Summary

Grant/Award: 3,705 shares

Grant/Award 1 txn

Insider Melda Aaron P

Role Chairman and President

Type	Security	Shares	Price	Value
Grant/Award	Common Stock, $.01 Par Value	3,705	$0.00	$0.00

Holdings After Transaction: Common Stock, $.01 Par Value — 3,705 shares (Direct)

Footnotes (1)

1. F1. Represents restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan (the "Plan"), which will vest in equal installments on March 1, 2027, and March 1, 2028, subject to the terms of the Plan and the applicable award agreement issued thereunder.

Key Figures

Restricted stock units granted: 3,705 units Grant price per unit: $0.00 per share Holdings after transaction: 3,705 shares/units +2 more

5 metrics

Restricted stock units granted 3,705 units Equity award to Chairman and President on June 1, 2026

Grant price per unit $0.00 per share Compensation grant, not open-market purchase

Holdings after transaction 3,705 shares/units Total non-derivative holdings following grant

First vesting date March 1, 2027 Half of restricted stock units vest

Second vesting date March 1, 2028 Remaining restricted stock units vest

Key Terms

restricted stock units, 2022 Omnibus Incentive Compensation Plan, vest, grant, award, or other acquisition

4 terms

restricted stock units financial

"Represents restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan"

Restricted stock units are a type of company reward where employees are promised shares of stock, but they only fully own these shares after meeting certain conditions, like staying with the company for a set time. They matter because they can become valuable assets and are often used to motivate employees to help the company succeed.

2022 Omnibus Incentive Compensation Plan financial

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

vest financial

"which will vest in equal installments on March 1, 2027, and March 1, 2028"

A vest is the process by which an employee earns the right to receive certain benefits or ownership interests, such as stock or retirement funds, over time. It’s similar to earning a reward gradually, ensuring that the benefit becomes fully yours only after a set period or meeting specific conditions. This makes it important for investors because it determines when they can actually claim or use those benefits.

grant, award, or other acquisition financial

"transaction_code_description": "Grant, award, or other acquisition"

FAQ

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

What insider transaction did Ameren (AEE) report for P. Melda Aaron?

Ameren reported that Chairman and President P. Melda Aaron received 3,705 restricted stock units of common stock as a compensation grant at a stated price of $0.00 per share, rather than through an open-market purchase or sale.

How many Ameren (AEE) shares or units does P. Melda Aaron hold after this Form 4?

After this compensation grant, P. Melda Aaron is reported as directly holding 3,705 shares or restricted stock units of Ameren common stock, according to the Form 4’s post-transaction ownership figure for non-derivative securities.

What type of award did Ameren (AEE) grant to P. Melda Aaron?

Ameren granted P. Melda Aaron 3,705 restricted stock units of common stock under its 2022 Omnibus Incentive Compensation Plan. This is a stock-based compensation award, not a cash bonus or open-market transaction.

When do P. Melda Aaron’s Ameren (AEE) restricted stock units vest?

The 3,705 restricted stock units will vest in two equal installments on March 1, 2027 and March 1, 2028. Vesting remains subject to the terms of Ameren’s 2022 Omnibus Incentive Compensation Plan and the related award agreement.

Was the Ameren (AEE) insider award to P. Melda Aaron an open-market buy?

No. The Form 4 identifies the transaction as a grant or award acquisition with a price of $0.00 per share. This indicates a stock-based compensation grant, not an open-market purchase of Ameren shares.

Under which plan were Ameren (AEE) restricted stock units granted to P. Melda Aaron?

The restricted stock units granted to P. Melda Aaron were issued under Ameren’s 2022 Omnibus Incentive Compensation Plan. Vesting is subject to this plan and the specific award agreement’s terms and conditions.

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

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Accepted by SEC EDGAR 06/03/2026 - 05:29 PM EDT 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^*

Melda Aaron P

(Last) (First) (Middle)

1901 CHOUTEAU AVENUE

(Street)

ST 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)
	Chairman and President

2a. Foreign Trading Symbol

3. Date of Earliest Transaction (Month/Day/Year)
06/01/2026

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	06/01/2026		A		3,705(1)	A	$0	3,705	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 restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan (the "Plan"), which will vest in equal installments on March 1, 2027, and March 1, 2028, subject to the terms of the Plan and the applicable award agreement issued thereunder.

Remarks:

	Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Aaron P. Melda	06/03/2026
	** 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.
* Form 4: SEC 1474 (03-26)