On October 30, 2024, the Board of Directors (the “Board”) of Vistra Corp. (the “Company”) approved and adopted the Amended and Restated Bylaws of the Company (the “Amended and Restated Bylaws”), which became effective as of such date. Among other things, the amendments effected by the Amended and Restated Bylaws: (i) revise procedural mechanics and disclosure requirements applicable to stockholder nominations of directors and submissions of proposals regarding other business at stockholder meetings; (ii) modify the provisions relating to lists of stockholders entitled to vote at stockholder meetings and adjournment procedures at stockholder meetings, in each case to reflect amendments to the Delaware General Corporation Law; (iii) permit special meetings of the Board to be called on less than 24 hours’ notice, if necessary; and (iv) implement new proxy access provisions. The Amended and Restated Bylaws also implement non-substantive, technical, and conforming changes.