SSE plc (formerly Scottish and Southern Energy plc) is a British energy company headquartered in Perth Scotland United Kingdom. It is a constituent of the FTSE 100 Index.
SSE operates in Ireland and the United Kingdom. It is involved in the generation and supply of electricity and gas, the operation of gas and telecoms networks and other energy-related services such as gas storage, exploration and production, contracting, connections and metering.
It is considered as one of the Big Six, that dominate the energy market in the United Kingdom.