Investor Presentaiton

Sustainability: Environmental Stewardship Vistra's green-focused targets emphasize its sustainability transition that balances reliability and affordability of power EMISSIONS REDUCTIONS 60% by 2030 As compared to 2010 baseline Net-Zero 2050 Scope 1 and Scope 2 GHG Emissions 173 (in MMtCO2e) 50% reduction already achieved³ 69 Targets Net-Zero 2010 2030 2050 PORTFOLIO TRANSFORMATION ~3,400 MW² of zero-carbon generation currently online ~15,150 MW fossil generation retired since 2010, ~10,400 MW retired since 2018 and on track for ~20,000 MW total retired by 2027 (from 2010 baseline) Disciplined Zero-Carbon generation/storage growth over time VISTRA VISTRAZERO EXCELLENCE IN SURFACE COAL MINING RECLAMATION AWARDS OFFICE OF SURFACE MINING RECLAMATION AND ENFORCEMENT AWARDS TxN Surface Coal Mining 2021 Excellence in 20 Texan by Nature 20 (TxN 20) Honoree 20 22 Reclamation Award REPORTING 2022 Sustainability Report (GRI & SASB) 2021 CDP questionnaire 2020 Climate Report (TCFD) Green Finance Framework 1. Vistra's goal to achieve a 60% reduction in noted emissions by 2030, as compared to the 2010 baseline, and net-zero carbon emissions by 2050, assumes necessary advancements in technology and supportive market constructs and public policy. 2. Includes Comanche Peak nuclear facility; does not include Energy Harbor nuclear generation. 3. As of YE 2022, and the full year reduction impact of recently retired coal units. Vistra Investor Presentation/June 2023 25 25

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