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  4. [Form 4] AMEREN CORP Insider Trading Activity

Ameren (NYSE: AEE) SVP sells 325 shares in pre-set plan

Filing Impact
(Neutral)
Filing Sentiment
(Negative)
Form Type
4

Rhea-AI Filing Summary

AMEREN CORP executive Theresa A. Shaw, SVP and CATO, reported selling 325 shares of common stock on August 14, 2026 at $108.93 per share in an open-market or private transaction pursuant to a Rule 10b5-1 trading plan. After this sale, she directly held 32,340 shares, which include 47 dividend equivalents accrued under restricted stock units. She also indirectly held 928 share equivalents through a unitized stock fund in the Ameren Corporation Savings Investment Plan as of July 31, 2026.

Positive

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Negative

  • None.
Insider Shaw Theresa A
Role SVP and CATO
Sold 325 shs ($35K)
Type Security Shares Price Value
Sale Common Stock, $.01 Par Value F2 325 $108.93 $35K
holding Common Stock, $.01 Par Value F1 -- -- --
Holdings After Transaction: Common Stock, $.01 Par Value — 32,340 shares (Direct); Common Stock, $.01 Par Value — 928 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 47 accrued dividend equivalents acquired during the second quarter of 2026 pursuant to a dividend reinvestment feature of restricted stock units granted under the issuer's 2022 Omnibus Incentive Compensation Plan.
Shares sold 325 shares Common Stock sale on August 14, 2026
Sale price $108.93 per share Price for the 325-share sale on August 14, 2026
Direct holdings after sale 32,340 shares Direct Ameren common stock held following the reported transaction
Dividend equivalents included 47 dividend equivalents Accrued during Q2 2026 via dividend reinvestment on restricted stock units
Indirect 401(k) holdings 928 share equivalents Estimated equivalents in unitized stock fund as of July 31, 2026
Rule 10b5-1 trading plan regulatory
"transactions were made under a Rule 10b5-1 trading plan"
A Rule 10b5-1 trading plan is a pre-arranged schedule that allows company insiders to buy or sell stock at specific times, even if they have inside information. It helps prevent accusations of unfair trading by making these transactions look planned and transparent, rather than sneaky or illegal.
dividend equivalents financial
"Amount includes 47 accrued dividend equivalents acquired during the second quarter"
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.
unitized stock fund financial
"share equivalents held by the reporting person in the unitized stock fund"
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

What insider transaction did Ameren (AEE) executive Theresa A. Shaw report?
Theresa A. Shaw reported a sale of 325 Ameren (AEE) common shares on August 14, 2026 at $108.93 per share, executed as an open-market or private transaction under a Rule 10b5-1 trading plan.

How many Ameren (AEE) shares does Theresa A. Shaw hold after this Form 4?
After the reported sale, Theresa A. Shaw directly held 32,340 Ameren (AEE) shares. In addition, she indirectly held 928 share equivalents through a unitized stock fund in the Ameren Corporation Savings Investment Plan as of July 31, 2026.

At what price were the Ameren (AEE) shares sold by Theresa A. Shaw?
The reported sale by Theresa A. Shaw was at a price of $108.93 per Ameren (AEE) share. The transaction covered 325 shares of common stock, categorized as a sale in an open-market or private transaction.

Was Theresa A. Shaw’s Ameren (AEE) stock sale under a Rule 10b5-1 plan?
Yes, the filing affirms that the transactions were made under a Rule 10b5-1 trading plan. Such plans allow pre-arranged trading of shares according to specified criteria, reducing the relevance of transaction timing for informational purposes.

What do the dividend equivalents mentioned in the Ameren (AEE) Form 4 represent?
The filing states that Shaw’s holdings include 47 accrued dividend equivalents acquired in the second quarter of 2026. These arose from a dividend reinvestment feature on restricted stock units granted under Ameren’s 2022 Omnibus Incentive Compensation Plan.

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Form 4 Insider Transactions: What Each Field Means →
SEC Form 4
FORM 4UNITED 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).
X
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 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)
Director10% Owner
XOfficer (give title below)Other (specify below)
SVP and CATO
2a. Foreign Trading Symbol
3. Date of Earliest Transaction (Month/Day/Year)
08/14/2026		6. Individual or Joint/Group Filing (Check Applicable Line)
XForm 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)
CodeVAmount(A) or (D)Price
Common Stock, $.01 Par Value928(1)IBy 401(k)
Common Stock, $.01 Par Value08/14/2026S325D$108.9332,340(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)
CodeV(A)(D)Date ExercisableExpiration DateTitleAmount 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 47 accrued dividend equivalents acquired during the second quarter 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. of Ameren Corporation, attorney-in-fact for Theresa A. Shaw08/17/2026
** Signature of Reporting PersonDate
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)

Source: View Original Filing on SEC EDGAR