Vistra Energy Corp. is an energy company, which engages in the provision of electricity and power generation. 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 focuses in the 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 such as general corporate expenses, interest, taxes, and other expenses related to support functions that provide shared services to operating segments and CAISO operations. The company was founded in 1882 and is headquartered in Irving, TX.