- Founded: 1998 (merger of Scottish Hydro-Electric and Southern Electric)
- FY 2024 Revenue: £10.46 billion
- Employees: Approximately 15,000
- Market Cap: Approximately £26 billion (January 2026)
- FTSE 100 Index constituent listed on the London Stock Exchange
SSE Plc is a multinational energy company headquartered in Perth, Scotland. The company develops, owns and operates low-carbon infrastructure including onshore and offshore wind farms, hydropower facilities, electricity transmission and distribution grids, and gas-fired generation plants.
SSE operates across Great Britain, Northern Ireland, the Republic of Ireland, and several European countries including Japan, Spain, Portugal, Denmark, and Poland. The company has become one of the UK’s largest generators of renewable electricity and ranks among the largest electricity network operators in the country.
SSE Plc History
SSE Plc Co-founders
SSE was not founded by individual entrepreneurs but emerged from the 1998 merger of two established public sector electricity authorities that had been privatised in the early 1990s.
SSE Plc Revenue
SSE Plc generated £10.46 billion in revenue for fiscal year 2024, ending March 2024. This represents a decrease from the previous year’s £12.5 billion, reflecting changes in energy market conditions.
The company’s revenue comes from multiple segments including electricity transmission, distribution, renewable energy generation, and thermal power plants. SSE continues to invest heavily in renewable infrastructure to support long-term growth.
SSE Plc Acquisitions
SSE has grown through strategic acquisitions that expanded its geographic reach and diversified its energy portfolio. The company has focused on building capabilities in renewable energy and strengthening its network infrastructure across the UK and Ireland.
In August 2000, SSE acquired the SWALEC energy supply business from Hyder plc. This deal brought approximately 863,000 domestic customers and 6,000 commercial accounts in Wales. The acquisition enabled SSE to trade electricity across the entire UK market rather than being restricted to Scotland and England.
The company purchased the Ferrybridge and Fiddlers Ferry coal-fired power stations from American Electric Power for £250 million in July 2004. That same year, SSE announced a landmark deal with National Grid Transco to acquire two gas distribution networks for £3.16 billion. The transaction completed in April 2005 and created Scotia Gas Networks, making SSE the second-largest energy distribution company in the UK.
The acquisition of Airtricity Holdings in January 2008 marked a major shift toward renewable energy. SSE paid approximately £1.35 billion for the Irish wind farm business. This deal doubled SSE’s renewable energy capacity and established it as the largest wind power operator in the UK and Ireland.
SSE purchased Uskmouth power station from Welsh Power Group in August 2009 for £27 million. In April 2010, the company acquired natural gas exploration and production assets from Hess Corporation across three areas of the UK Continental Shelf. More recent transactions include the 2021 sale of SSE’s 33.3% stake in SGN for £1.2 billion, as the company refocused on renewable energy and electricity networks.
SSE Plc Marketcap
SSE Plc maintains a market capitalisation of approximately £26 billion as of January 2026. The company trades on the London Stock Exchange and is a constituent of the FTSE 100 Index.
SSE Plc Competitors
SSE operates in a competitive UK energy market alongside several major utilities. The company was formerly part of the Big Six energy suppliers but sold its retail business to OVO Energy in 2020. SSE now competes primarily in electricity generation, transmission, and distribution. Similar to FirstEnergy Corp. in the US market, SSE focuses on regulated network operations and power generation.
| Company | Headquarters | Primary Business |
|---|---|---|
| National Grid | London, UK | Electricity and Gas Transmission |
| Centrica (British Gas) | Windsor, UK | Energy Supply and Services |
| EDF Energy | London, UK | Nuclear and Renewable Generation |
| E.ON UK | Coventry, UK | Energy Supply and Renewables |
| Scottish Power | Glasgow, UK | Electricity Generation and Networks |
| Drax Group | Selby, UK | Biomass and Renewable Generation |
| Orsted | Fredericia, Denmark | Offshore Wind Development |
| Iberdrola | Bilbao, Spain | Renewable Energy and Networks |
| OVO Energy | Bristol, UK | Retail Energy Supply |
| Octopus Energy | London, UK | Retail Energy and Technology |
FAQs
What does SSE stand for?
SSE stands for Scottish and Southern Energy. The company shortened its name from Scottish and Southern Energy plc to SSE plc in January 2010.
When was SSE Plc founded?
SSE was formed in September 1998 through the merger of Scottish Hydro-Electric and Southern Electric, two privatised electricity companies with origins dating back to 1943 and 1948.
Where is SSE Plc headquartered?
SSE Plc is headquartered in Perth, Scotland, United Kingdom. The company operates across Great Britain, Ireland, and several European countries.
Is SSE a renewable energy company?
Yes, SSE is one of the UK’s largest renewable energy generators. The company owns and operates onshore and offshore wind farms, hydropower facilities, and invests heavily in clean energy infrastructure.
Does SSE still supply energy to homes?
No, SSE sold its GB household energy supply business to OVO Energy in 2020. SSE now focuses on electricity networks, renewable generation, and business energy services.