First Gen Corp. is an investment holding company, which engages in the power generation business. It operates through the following segments: First Gas Power (FGPC), FGP, Energy Development (EDC), First Natgas Power (FNPC), Prime Meridian, and First Gen Hydro Power (FG Hydro). The FGPC segment operates the gas fired combined cycle power plant in Santa Rita. The FGP segment manages the gas fired combined cycle power plant in San Lorenzo. The EDC segment is involved in the operation of geothermal steamfields and power plants. The FNPC segment owns and operates the natural gas fired San Gabriel power plant. The Prime Meridian segment owns and operates Avion open cycle natural gas-fired power plant. The FG Hydro segment operates the Pantabangan Masiway hydroelectric power complex. The company was founded on December 22, 1998 and is headquartered in Pasig, Philippines.