SSE Plc is an electricity and gas company, which engages in the generation, transmission, distribution and supply of electricity. The company also engages in the production, storage, distribution and supply of gas. It operates through three segments: Networks, Retail and Wholesale. The Networks segment focuses on the economically regulated transmission and distribution of electricity and gas, and other related networks. The Retail segment engages in the supply of electricity, gas and other services to household and business customers. The Wholesale segment focuses in the production, storage and generation of energy, and energy portfolio management. SSE was formerly known as Scottish & Southern Energy Plc. The company was founded in December 1998 and is headquartered in Perth, the United Kingdom.