Mizell Gwendolyn G 4

What Happened
Gwendolyn G. Mizell, SVP & CSO of a subsidiary of Ameren Corporation (AEE), had 943 shares withheld to cover tax withholding obligations related to the vesting of equity awards. The withholding was recorded on 2026-02-27 at a price of $113.28 per share, for a total value of about $106,823.

Key Details

• Transaction date: 2026-02-27; Form 4 filed: 2026-03-03.
• Transaction type/code: F — payment of exercise price or tax liability (shares withheld).
• Shares withheld/disposed: 943 shares at $113.28 each (total ≈ $106,823).
• Shares owned after transaction: Not specified in the provided filing.
• Footnotes in filing: F1 notes estimated share equivalents held in the Ameren Savings Investment Plan as of 2/28/2026; F2 confirms shares were withheld by the issuer to satisfy tax withholding on vesting of performance share units and restricted stock units.
• No indication in this filing of an open-market sale or a 10b5-1 plan; this is a routine tax-withholding transaction related to vested awards.

Context
This was a tax-withholding (cashless) disposition tied to the vesting of equity awards, not an open-market sale. Such withholding is routine and typically reflects tax obligations rather than a directional insider view on the company.