X0306 4 2019-02-28 0001002910 AMEREN CORP AEE 0001190099 LYONS MARTIN J P.O. BOX 66149 ST. LOUIS MO 63166-6149 0 1 0 0 Executive VP & CFO Common Stock, $.01 Par Value 1573 I By 401(K) Common Stock, $.01 Par Value 2019-02-28 4 F 0 28343 71.24 D 178587 D Common Stock, $.01 Par Value 2019-03-01 4 S 0 17794 70.82 D 160793 D 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, 2019. Shares withheld by the issuer to satisfy tax withholding obligations arising in connection with the vesting of performance share units. Shares sold pursuant to a Rule 10b5-1 trading plan adopted by the reporting person. Jonathan T. Shade, Asst. Secy. of Ameren Corporation, attorney-in-fact for Martin J. Lyons, Jr. 2019-03-04