VST: Acquisition or asset disposal · New financial obligation · Unregistered securities sale · Company disclosure

Item 7.01. Regulation FD Disclosure. On October 30, 2026, Vistra issued a press release announcing completion of the Transactions. A copy of this press release is attached hereto as Exhibit 99.1 and is incorporated herein by reference. In accordance with General Instruction B.2 of Form 8-K, the information in this Item 7.01 and Exhibit 99.1 attached hereto is deemed to be furnished and shall not be deemed “filed” for purposes of Section 18 of the Securities Exchange Act of 1934, as amended, or otherwise subject to the liabilities of that section, nor shall it be deemed incorporated by reference in any filing under the Securities Act except as shall be expressly set forth by specific reference in such a filing. Item 9.01. Financial Statements and Exhibits. Exhibit No. Description 2.1* Purchase and Sale Agreement, dated as of December 31, 2025, by and among Q-Generation Holdings, LLC, Vistra Operations Company LLC and Vistra Corp. (incorporated by reference to Exhibit 2.1 to Vistra’s Current Report on Form 8-K filed on January 5, 2026). 2.2* Agreement and Plan of Merger, dated as of December 31, 2025, by and among Hamilton Holdings II, LLC, Vistra Operations Company LLC, TSVME LLC and Q-Generation Holdings, LLC (incorporated by reference to Exhibit 2.2 to Vistra’s Current Report on Form 8-K filed on January 5, 2026). 99.1 Press Release dated October 30, 2026. 104 The cover page from this Current Report on Form 8-K, formatted in Inline XBRL. * Certain schedules and other similar attachments to this exhibit have been omitted pursuant to Item 601(a)(5) of Regulation S-K. Vistra agrees to furnish supplementally a copy of any omitted schedules or attachments to the SEC upon its request. 3 SIGNATURES Pursuant to the requirements of the Securities Exchange Act of 1934, the regis