Dynegy, Inc. operates as a holding company with interest in production and sale of electric energy, capacity and ancillary services from their fleet of power plants. It operates its business through its subsidiaries under three segments: Coal, IPH and Gas. The Coal segment operates through Dynegy Midwest Generation, LLC, which owns, directly and indirectly certain of their coal-fired power generation facilities in Illinois. The IPH segment includes IPGC or Genco, which also owns, directly and indirectly, certain of their coal-fired power generation facilities in Illinois. The Gas segment operates both intermediate and peaking natural gas plants, located in the Midwest, Northeast and California. Dynegy was founded in 1984 and is headquartered in Houston, TX.