Redes Energeticas Nacionais SGPS SA is a holding company, which engages in the management of the the main transport infrastructure of electricity and natural gas. It operates through the following business segments: Electricity, Gas, Telecommunications, and Others. The Electricity segment deals with the transmission of electricity and overall management of the public electricity supply system. The Gas segment includes the transportation of gas; management of national natural gas system, and underground storage of natural gas. The Telecommunications segment operates telecommunications network. The Others segment includes the operations of REN SGPS, REN Serviços, and REN Finance, BV. The company was founded on August 18, 1994 and is headquartered in Lisbon, Portugal.