Vistra Corp.

During the three months ended September 30, 2026, 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) (a 10b5-1 Plan) or any "non-Rule 10b5-1 trading arrangement," except as set forth below.

On August 18, 2026, Stephanie Moore, Executive Vice President, General Counsel and Chief Compliance Officer of the Company, entered into a 10b5-1 Plan. The 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. The 10b5-1 Plan will become effective on November 20, 2026 and will terminate on August 27, 2027, subject to earlier termination as provided in the 10b5-1 Plan. The 10b5-1 Plan was entered into during an open insider trading window in accordance with our Transactions in Securities Policy.

On August 24, 2026, Stacey Doré, Chief Strategy and Sustainability Officer & Executive Vice President, Public Affairs of the Company, entered into a 10b5-1 Plan. The 10b5-1 Plan provides for the potential sale of up to 50,000 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. The 10b5-1 Plan will become effective on January 4, 2027 and will terminate on June 30, 2027, subject to earlier termination as provided in the 10b5-1 Plan. The 10b5-1 Plan was entered into during an open insider trading window in accordance with our Transactions in Securities Policy.