EDF retains position as no.1 large business energy supplier
EDF has once again been confirmed as the leading energy supplier for large businesses in Great Britain, according to the latest data from Cornwall Insight. The report highlights EDF’s market leadership in both meter points and volume in the Industrial & Commercial (I&C) segment, reinforcing its commitment to providing reliable and innovative energy solutions.
As Britain’s largest generator of zero-carbon electricity, EDF remains dedicated to powering the nation’s large businesses and public sector organisations while helping them save both cash and carbon.
Key Findings from the Cornwall Insight Report:
- EDF added 14,285-meter points and increased its billing volume by 2TWh, demonstrating substantial growth in the I&C sector.
- The company holds the No.1 position in the I&C market for both meter points and volume.
- Historically focused on larger I&C customers, EDF maintains a 66% share of meters and a 48% share of volume in the HH >30GWh sector.
- Across the entire I&C market, EDF accounts for 27% of meters and 25% of volume.
Camilla McCorkell, Director of EDF Business Solutions, commented: “We are proud to be recognised as the market leader for both meter points and volume in the I&C segment. At EDF, we go beyond supplying energy we support our large business customers, across a range of industry sectors with carbon and cost-saving solutions, that help them on their journey to net zero. Our position as a leading meter operator and energy supplier means businesses can rely on us for all their energy needs under one roof, empowering them to achieve their sustainability and operational goals.”
Dan Morris, CEO at Cornwall Insight said: “It is a significant achievement that Cornwall Insight have been able to able to rank EDF as the biggest large business energy supplier for another year. Our Business Market Share report is the yardstick for a highly competitive and innovative sector, and EDF’s ability to maintain its position as the leading large business energy supplier highlights its consistent performance and dedication to excellence in the sector."
Notes to Editors:
About the Report: The Business Electricity Market Share Headlines report accompanies Cornwall Insight’s October 2024 Business Electricity Market Share Survey, published on 18 January 2025. This biannual survey provides insights into the UK’s business electricity market, including:
- Market scale and segmentation across business electricity sectors.
- Market shares by supplier for contract segments, covering all suppliers with a market share of more than 1% by meters or volume as of 31 October 2024 (Q424).
- Comparative analysis against previous survey results from 30 April 2024 (Q224) and longer-term market trends.
- Cornwall Insight’s survey is based on independent assessments of market dimensions and supplier shares, incorporating data from public sources, media reports, industry insights, and supply market dynamics.
About EDF
EDF is driving the transition towards An Electric Britain – a secure, affordable, low-carbon future for everyone. As Britain’s biggest generator of zero carbon electricity, we are investing more than £100 million weekly in Britain’s electricity infrastructure. We supply millions of customers with electricity and help homes and businesses switch to electricity for heating, transport and industrial processes.
We operate five nuclear power stations and more than 35 onshore wind farms and three offshore wind farms. Since 2009, EDF has invested almost £9 billion in the nuclear fleet to improve reliability and extend station lifetimes. The five generating stations currently supply about 12% of the UK’s electricity demand.
EDF is building the UK's nuclear renaissance with the construction of a new nuclear power station at Hinkley Point C. We are a minority investor (12.5%) in and major supplier to a replica plant at Sizewell C in Suffolk. Hinkley Point C and Sizewell C will provide low carbon electricity to meet 14% of UK demand and power around 12 million homes. EDF Group companies Framatome and Arabelle Solutions have a presence in the UK and manufacture critical equipment such as reactor pressure vessels and turbines.
EDF is enabling its 5 million customers, both in business and at home, to choose electric solutions that save cash and carbon, whether it is buying an electric car, generating and storing electricity, selling energy back to the grid or installing solar panels or a heat pump. In 2025, EDF’s Customers business was ranked as one of the Sunday Times’s Best Place to Work.
It is also one of the UK’s leading developers of renewable energy through EDF power solutions UK and Ireland. We have more than 2GW of renewable generation in operation and over 10GW in construction, planning and development across a range of technologies including onshore and offshore wind, solar and battery storage.
We are one of the largest suppliers to British business and a leading supplier of innovative energy solutions that are helping businesses become more energy independent. In addition, the company’s energy services business, Dalkia, one of the UK and Ireland’s largest technical service providers.
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