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 includes electricity distribution, electricity transmission, gas distribution and other Networks. The Retail segment provides energy supply and energy-related services to household and business customers. The Wholesale segment includes portfolio management, electricity, gas storage and gas production. SSE was formerly known as Scottish & Southern Energy Plc. The company was founded in December 1998 and is headquartered in Perth, the United Kingdom.