Vistra Corp. is an integrated retail electricity and power generation company based in Irving, Texas. The company is the largest competitive power generator in the U.S. with a capacity of approximately 39GW powered by a diverse portfolio, including natural gas, coal, nuclear, solar, and battery energy storage facilities.[2]
In the 2020 Forbes Global 2000, Vistra Energy was ranked as the 756th-largest public company in the world.[3] The company owns the Moss Landing Power Plant in California which as of 2021 contained the largest battery energy storage system in the world (400-MW/1,600-MWh), but was significantly damaged in a fire in January 2025. As of 2020, the company was ranked as the highest CO2 emitter in the US.[4] In 2024, it is ranked first as the No. 1 polluter in the United States for the 2024 Greenhouse 100 Polluters Index Report, producing 1.5% of all greenhouse gas emissions generated in the United States of America, according to the Political Economy Research Institute (PERI) at the University of Massachusetts, Amherst.[5]