REN - Redes Energéticas Nacionais, SGPS, S.A., together with its subsidiaries, engages in the transmission of electricity and natural gas in Portugal. The company operates in two segments, Electricity and Gas; and Telecommunications. It operates as a national electricity transmission network; purchases, sells, imports, and exports electricity and natural gas; manages a concession to operate a pilot area to produce electric energy from ocean waves; and operates a telecommunications network. The company also operates liquefied natural gas terminal maintenance and regasification facilities; and manages projects and ventures in the natural gas sector. In addition, it provides underground storage development, maintenance, and operation services; natural gas transport and management services; and distributes natural gas, as well as communication and sustainability, marketing, business management, business development and consulting, and IT project services. Further, the company invests in assets, shares, companies, and associations; transmits and transforms electricity in Chile, as well as participates, finances, collaborates, and conducts management of companies; and manages back offices. The company was founded in 1994 and is headquartered in Lisbon, Portugal.