Vistra Corp

(a) On February 25, 2024, Brian Ferraioli notified the Company that he will not seek re-election and will resign as a member of the Board of Directors (Board) of the Company, effective as of the date of the Company's 2024 annual meeting of stockholders (Annual Meeting). Mr. Ferraioli's other business and professional opportunities have increased in demand, and he is resigning from the Board to focus on those other opportunities. Mr. Ferraioli has served as a director of the Company since 2017. Mr. Ferraioli's decision not to seek re-election is not the result of any disagreement with the Company on any matter relating to the Company's operations, policies or practices.

In addition, on February 26, 2024, Jeff Hunter notified the Company that he will not seek re-election and will resign as a member of the Board, effective as of the Annual Meeting. Mr. Hunter's other business and professional opportunities have increased in demand, and he is resigning from the Board to focus on those other opportunities. Mr. Hunter has served as a director of the Company since 2016. Mr. Hunter's decision not to seek re-election is not the result of any disagreement with the Company on any matter relating to the Company's operations, policies or practices.

The Board and the Company express sincere appreciation to Messrs. Ferraioli and Hunter for their leadership, strategic contributions, and dedicated service to the Board and the Company.

(b) During the three months ended December 31, 2023, none of our officers or directors adopted orterminated any contract, instruction, or written plan for the purchase or sale of Company securities that was intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) or any "non-Rule 10b5-1 trading arrangement".