| Id | Content |
|---|---|
| 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 January 31, 2024. |
| F2 | Shares withheld by the issuer to satisfy tax withholding obligations arising in connection with the vesting of restricted stock units; although the reporting person's intervening reports correctly stated the total amount of securities beneficially owned, this transaction is being reported late due to an inadvertent administrative error. |
| F3 | These restricted stock units were granted under the issuer's 2022 Omnibus Incentive Compensation Plan (the "Plan") and are scheduled to vest upon the payment date in 2027, which shall be no later than March 15, 2027, subject to the terms of the Plan and the applicable award agreement issued thereunder. |
| F4 | Shares acquired upon vesting of previously granted performance share units. |
| F5 | Amount includes 611 accrued dividend equivalents acquired during the fourth quarter of 2023 pursuant to a dividend reinvestment feature of restricted stock units granted under the Plan. |