X0306 4 2022-02-22 0 0001692819 Vistra Corp. VST 0001729598 DOBRY ELIZABETH CHRISTINE 6555 SIERRA DRIVE IRVING TX 75039 0 1 0 0 SVP and Controller Common Stock 2022-02-22 4 F 0 957 21.21 D 24865 D Common Stock 2022-02-22 4 A 0 2964 0.00 A 27829 D This transaction represents the withholding by the Issuer of shares to pay taxes in connection with the vesting of restricted stock units. The timing and amount of the transaction were determined by the terms of the applicable restricted stock unit award and were not within the control of the Reporting Person. Represents performance-based restricted stock units for which the applicable performance criteria for the three-year period ended December 31, 2021 was certified by the Issuer's Social Responsibility and Compensation Committee of the Board of Directors as of February 22, 2022. /s/ Yuki Whitmire, as Attorney-in-Fact 2022-02-24