Mark C. Lindgren - 27 Feb 2026 Form 4 Insider Report for AMEREN CORP (AEE)

Reporting relationship: EVP & Chief HR Officer of Sub
Issuer ticker: AEE
Reported as of: 27 Feb 2026
Net transaction value: -$464,521
SEC form: 4
Accepted by SEC: 03 Mar 2026, 16:46:11 UTC
Prior SEC filing: 09 Feb 2026
Source filing: View source filing
Reporting owner signature: Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Mark C. Lindgren

Key filing fact

Mark C. Lindgren filed Form 4 for AMEREN CORP (AEE) on 03 Mar 2026.

Key facts

This page summarizes Mark C. Lindgren's Form 4 filing for AMEREN CORP (AEE).
2 reported transactions and 0 derivative rows are listed below.
Accepted by SEC: 03 Mar 2026, 16:46.

Change

Previous filing in this sequence was filed on 09 Feb 2026.
Current net transaction value: -$464,521.

Research use

This tells you what this filing adds before you inspect full transaction and derivative tables.
You can trace every row back to the original SEC filing document.

Evidence

Filed on Form 4

Ownership activity is grounded in SEC Form 4 disclosures.

View source filing

Reporting Owners (1)

CIK 0001640852 Primary reporting owner

Lindgren Mark C

Relationship: EVP & Chief HR Officer of Sub
Address: P.O. BOX 66149, ST. LOUIS
Signature: Jonathan T. Shade, Deputy Corp. Secy. for Ameren Corporation, attorney-in-fact for Mark C. Lindgren
Signature date: 03 Mar 2026

Reported non-derivative transactions

Shares, units, or other non-derivative securities reported in this filing.

AEE transaction

Common Stock, $.01 Par Value

Tax liability

Transaction value: $232,677
Shares: -2,054
Change %: -4.2%
Price: $113.28
Shares after: 47,046
Date: 27 Feb 2026
Ownership: Direct
Footnotes: F2

AEE transaction

Common Stock, $.01 Par Value

Sale

Transaction value: $231,844
Shares: -2,073
Change %: -4.4%
Price: $111.84
Shares after: 44,983
Date: 03 Mar 2026
Ownership: Direct
Footnotes: F3

AEE holding

Common Stock, $.01 Par Value

No transaction description listed

Transaction value
Shares
Change %
Price
Shares after: 1,733
Date: 27 Feb 2026
Ownership: By 401(K)
Footnotes: F1

^* marks a reported price that did not pass the local price check.

Additional SEC filing notes

Filing notes and footnotes

Rule 10b5-1 trading plan

These transactions were reported as open-market trades under a Rule 10b5-1 plan. The plan lets an insider set trading instructions in advance, which can reduce the risk of trading while in possession of material nonpublic information.

Original filing language: transaction made pursuant to a contract, instruction, or written plan intended to satisfy Rule 10b5-1(c).

Explanation of responses 3 footnotes

Footnote 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 February 28, 2026.

Footnote F2

Shares withheld by the issuer to satisfy tax withholding obligations arising in connection with the vesting of performance share units and restricted stock units.

Footnote F3

Shares sold pursuant to a Rule 10b5-1 trading plan adopted by the reporting person.