VST

Vistra Corp.

A power generator and retail electricity seller serving millions of homes and businesses across the US under brands including TXU Energy, Ambit Energy, and Dynegy Energy Services. Formed in 2016 from the bankruptcy restructuring of Energy Future Holdings, the former parent of Texas utility TXU Energy, it later merged with Dynegy in 2018. Its name was chosen to signal a fresh start, and it ranks among the largest competitive power producers in the country, running gas, coal, and nuclear plants like Comanche Peak.