144/A 0001950047-26-006326 0001342932 XXXXXXXX LIVE 0001692819 Vistra Corp. 001-38086 6555 SIERRA DRIVE IRVING TX 75039 214-812-4600 SULT JOHN R Director Common Morgan Stanley Smith Barney LLC Executive Financial Services

1 New York Plaza 8th Floor New York NY 10004

6500 1032395.00 337182468 06/18/2026 NYSE Common 03/10/2020 Open Market Purchase Issuer N 3691 03/10/2020 Cash Common 05/07/2021 Open Market Purchase Issuer N 2809 05/07/2021 Cash Y The 144 form is amended to update the acquisition information and lots for the shares sold on 6/18/2026. 06/23/2026 03/16/2026 /s/ John R. Sult