Vistra Energy Corp. operates as an energy company, which engages in the provision of electricity and power generation. Its portfolio of businesses includes TXU Energy and Luminant. It operates through the following segments: Retail, ERCOT, PJM, NY/NE, MISO, Asset Closure, and Corporate and Other. The Retail segment sells electricity and related services to residential, commercial and industrial customers. The ERCOT, PJM, NY/NE, and MISO segments relate to electricity generation, wholesale energy sales and purchases, commodity risk management activities, and fuel production and logistics management. The Asset Closure segment involves in the decommissioning and reclamation of retired plants and mines. The Corporate and Other represents the remaining non-segment operations. The company was founded in 1882 and is headquartered in Irving, TX.