Dynegy Inc. is a former electric company based in Houston, Texas, in the United States. It owned and operated a number of power stations in the U.S., all of which were natural gas-fueled or coal-fueled, until merging with Vitra Energy on April 9, 2018.. The company is located at 601 Travis Street in Downtown Houston. The company was founded in 1984 as Natural Gas Clearinghouse. It was originally an energy brokerage, buying and selling natural gas supplies. It changed its name to NGC Corporation in 1995 after entering the electrical power generation business.