Vistra Corp.

During the three months ended December 31, 2025, 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," except as set forth below:

On December 2, 2025, Stephanie Zapata Moore, Executive Vice President, General Counsel and Chief Compliance Officer of the Company, entered into a trading plan intended to satisfy the affirmative defense conditions of Rule 10b5-1(c) of the Exchange Act (10b5-1 Plan). Moore's 10b5-1 Plan provides for the potential sale of up to 57,500 shares of our common stock. Any sales are subject to certain price limitations set forth in the 10b5-1 Plan such that the actual number of shares sold could vary if certain minimum stock prices are not met. Moore's 10b5-1 Plan will become effective on March 9, 2026 and will terminate on October 30, 2026, subject to earlier termination as provided in the 10b5-1 Plan. Moore's 10b5-1 Plan was entered into during an open insider trading window in accordance with our Transactions in Securities Policy.

On December 1, 2025, Scott Hudson, Executive Vice President and President of Vistra Retail of the Company, entered into a 10b5-1 Plan. Hudson's 10b5-1 Plan provides for the potential sale of up to 27,000 shares of our common stock. Any sales are subject to certain price limitations set forth in the 10b5-1 Plan such that the actual number of shares sold could vary if certain minimum stock prices are not met. Hudson's 10b5-1 Plan will become effective on March 9, 2026 and will terminate on August 31, 2026, subject to earlier termination as provided in the 10b5-1 Plan. Hudson's 10b5-1 Plan was entered into during an open insider trading window in accordance with our Transactions in Securities Policy.

On December 1, 2025, Stacey Doré, Chief Strategy and Sustainability Officer and Executive Vice President of Public Affairs of the Company, entered into a 10b5-1 Plan. Doré's 10b5-1 Plan provides for the potential sale of up to 36,000 shares of our common stock. Any sales are subject to certain price limitations set forth in the 10b5-1 Plan such that the actual number of shares sold could vary if certain minimum stock prices are not met. Doré's 10b5-1 Plan will become effective on March 9, 2026 and will terminate on December 31, 2026, subject to earlier termination as provided in the 10b5-1 Plan. Doré's 10b5-1 Plan was entered into during an open insider trading window in accordance with our Transactions in Securities Policy.