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Investor Presentaiton

Q1 2023 Generation Metrics TOTAL GENERATION1 CAPACITY FACTOR (CCGT) 1 TWhs Q1 2022 Q1 2023 % Q1 2022 Q1 2023 TEXAS 17.7 16.6 TEXAS 34% 35% EAST 14.3 14.6 EAST 62% 62% WEST 1.2 1.5 WEST 54% 70% SUNSET 5.9 3.5 Ong. Ops 39.1 36.2 Asset Closure 3.9 CAPACITY FACTOR (COAL) 1 % COMMERCIAL AVAILABILITY1 Q1 2022 Q1 2023 % Q1 2022 Q1 2023 TEXAS SUNSET 77% 60% 60% 36% TEXAS Gas 94.3% 98.9% TEXAS Coal 94.1% 95.1% EAST 99.0% 98.5% WEST 98.9% 98.3% SUNSET 89.2% 84.5% Total 96.3% 96.9% CAPACITY FACTOR (NUCLEAR)² % Q1 2022² Q1 2023 TEXAS 101% 101% 1. 2. Total generation, commercial availability and capacity factor statistics remove Edwards from Q1 2022 Sunset segment as it is now reported as part of the Asset Closure segment. Q1 2022 capacity factor restated to use 2,400 MW capacity, versus 2022 reported capacity of Comanche Peak of 2,300 MW. Vistra Investor Presentation/June 2023 VISTRA 36
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