Top energy companies in the UK
| Company Name | Country | City | Address 1 | State/Province | Postal Code | Website | Founding Year | Yearly Revenue in U.S. Dollars | Employees Total | Business Legal Type - Description | Number of Companies in Group | Company Registration Number | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 | Edf Energy Customers LIMITED | Unitedkingdom | Queen'S Park | 11 Bressenden Place | London | SW1E 5BY | edfenergy.***** | 1988 | $17,306,394,664 | 3,708 | Corporation | 71 | 02228297 |
| 2 | Edf Energy LIMITED | Unitedkingdom | Queen'S Park | Nova North | London | SW1E 5BY | edfenergy.***** | 1989 | $13,453,909,066 | 819 | Corporation | 71 | 02366852 |
| 3 | Octopus Energy LIMITED | Unitedkingdom | Holborn-strand-covent Garden | 1 Upper James Street | London | W1F 9DE | octopus.***** | 2014 | $12,279,187,382 | 2,445 | Corporation | 206 | 09263424 |
| 4 | E.ON Next Energy LIMITED | Unitedkingdom | Finham | E on UK Plc | Coventry, West Midlands | CV4 8LG | eonnext.***** | 1990 | $10,066,662,762 | 3,852 | Corporation | 1341 | 03782443 |
| 5 | Sefe Marketing & Trading LIMITED | Unitedkingdom | Hampstead | 20 Triton Street | London | NW1 3BF | sefe-mt.***** | 1999 | $7,978,155,399 | 849 | Corporation | 5998 | 03768267 |
| 6 | Cnooc U.K. Marketing LTD | Unitedkingdom | Holborn-strand-covent Garden | Level 6 | London | W1H 6AZ | N/A | 2019 | $7,379,575,000 | 242 | Corporation | 1527 | 11894677 |
| 7 | British Gas LIMITED | Unitedkingdom | Windsor | Millstream | Windsor and Maidenhead | SL4 5GD | britishgas.***** | 2013 | $6,960,841,862 | 266 | Corporation | 235 | 08811254 |
| 8 | Npower Commercial Gas LIMITED | Unitedkingdom | Finham | Westwood Way | Coventry, West Midlands | CV4 8LG | N/A | 1990 | $6,269,753,611 | 1,021 | Corporation | 1341 | 03768856 |
| 9 | Scottishpower Energy Retail LIMITED | Unitedkingdom | Glasgow | Scottishpower House | Glasgow City | G2 5AD | scottishpower.***** | 1998 | $5,945,935,653 | 932 | Corporation | 3627 | SC190287 |
| 10 | Edf Energy Nuclear Generation LIMITED | Unitedkingdom | Gloucester | Javelin House,building 1420 | Gloucestershire | GL3 4AE | edfenergy.***** | 1995 | $5,120,167,598 | 5,366 | Corporation | 71 | 03076445 |
| 11 | B.B. Energy Trading LIMITED | Unitedkingdom | Kensington | Bb House | London | W8 5BN | bbenergy.***** | 2002 | $5,029,677,000 | 73 | Corporation | 7 | 04511776 |
| 12 | Drax Energy Solutions LIMITED | Unitedkingdom | Selby | Drax Power Station | North Yorkshire | YO8 8PH | drax.***** | 2006 | $4,260,239,316 | 405 | Corporation | 51 | 05893966 |
| 13 | Sse Hornsea LIMITED | Unitedkingdom | Reading | 43 Forbury Road | Reading | RG1 3JH | N/A | 2002 | $4,207,213,612 | 97 | Corporation | 308 | 04467860 |
| 14 | E.ON UK Energy Markets LIMITED | Unitedkingdom | Finham | Westwood Way | Coventry, West Midlands | CV4 8LG | eonenergy.***** | 2015 | $3,939,955,656 | 107 | Corporation | 1341 | 09884706 |
| 15 | National Energy System Operator LIMITED | Unitedkingdom | Winnersh | St. Catherines Lodge | Wokingham | RG41 5BN | neso.***** | 2024 | $3,673,516,440 | 2,076 | Corporation | N/A | 11014226 |
| 16 | Scottishpower Energy Management LIMITED | Unitedkingdom | Cathcart | Spean Street Cathcart Business Park | Glasgow City | G44 4BE | scottishpower.***** | 2001 | $3,558,763,679 | 59 | Corporation | 3627 | SC215843 |
| 17 | Statkraft Markets GMBH | Unitedkingdom | Monument-aldgate-fenchurch Street-tower Hill | : 19th Floor | London | EC2N 4BQ | statkraft.***** | 2018 | $3,520,513,490 | 241 | Foreign company | 2922 | FC035811 |
| 18 | National Grid Electricity Transmission PLC | Unitedkingdom | Holborn-strand-covent Garden | 1 - 3 Strand | London | WC2N 5EH | nationalgrid.***** | 1989 | $3,312,995,715 | 6,102 | Corporation | 569 | 02366977 |
| 19 | Sse Energy Supply LIMITED | Unitedkingdom | Reading | No.1 Forbury Place | Reading | RG1 3JH | sseplc.***** | 1999 | $3,289,719,991 | 1,057 | Corporation | 308 | 03757502 |
| 20 | E.ON UK PLC | Unitedkingdom | Finham | Westwood House | Coventry, West Midlands | CV4 8HS | eonenergy.***** | 1989 | $3,231,321,418 | 905 | Corporation | 1341 | 02366970 |
| 21 | National Grid Electricity Distribution PLC | Unitedkingdom | Saint Philips | Avonbank | City of Bristol | BS2 0TB | westernpower.***** | 2014 | $3,133,620,842 | 7,102 | Corporation | 569 | 09223384 |
| 22 | Sefe Energy LIMITED | Unitedkingdom | Hampstead | 20 Triton Street | London | NW1 3BF | N/A | 2007 | $2,802,894,342 | 291 | Corporation | 5998 | 03904624 |
| 23 | Cadent Gas LIMITED | Unitedkingdom | Shilton | Ansty Park Pilot Way | Warwickshire | CV7 9JU | cadentgas.***** | 2016 | $2,747,547,420 | 6,361 | Corporation | 11 | 10080864 |
| 24 | Vpi Holding LIMITED | Unitedkingdom | Queen'S Park | 10th Floor | London | SW1E 5LB | vitol.***** | 2013 | $2,384,509,842 | 299 | Corporation | 19 | 08484743 |
| 25 | Centrica Energy Marketing LIMITED | Unitedkingdom | Windsor | Millstream | Windsor and Maidenhead | SL4 5GD | centrica.***** | 2013 | $2,207,541,435 | 5 | Corporation | 235 | 08807923 |
Showing 25 of 18,235 companies
Request Free SampleEnergy companies in the UK by employee size
| Bracket | Companies | Share |
|---|---|---|
| 1-4 | 15,281 | |
| 5-9 | 1,375 | |
| 0 or Unknown | 695 | |
| 10-19 | 370 | |
| 20-49 | 245 | |
| 50-99 | 110 | |
| 100-199 | 60 | |
| 200-499 | 54 | |
| 1.000-4.999 | 22 | |
| 500-999 | 21 | |
| 5.000-9.999 | 2 |
Energy companies in the UK by revenue
| Bracket | Companies | Share |
|---|---|---|
| 1 to 100.000 | 7,566 | |
| 100.001 to 499.999 | 5,355 | |
| 1.000.000 to 4.999.999 | 2,012 | |
| 500.000 to 999.999 | 1,533 | |
| 0 or Unknown | 539 | |
| 10.000.000 to 49.999.999 | 474 | |
| 5.000.000 to 9.999.999 | 435 | |
| 100.000.000 to 499.999.999 | 139 | |
| 50.000.000 to 99.999.999 | 101 | |
| 1.000.000.000 or more | 45 | |
| 500.000.000 to 999.999.999 | 36 |
About the UK energy companies sector
The UK energy companies market spans large national operators and local independents across England, Scotland, Wales and Northern Ireland. Together they make up the full list of energy companies in the UK shown above, grouped under the Utilities category.
Looking for a list of energy companies in the UK for outbound sales, an email list for marketing campaigns, or a mailing list for direct outreach? The list above is filterable by region, employee size, revenue band and founding year. Every active business is verified against the UK companies register. Export to CSV or Excel, or request a free sample to evaluate.
Closely related industries
UK energy companies sit within the Utilities sector. The list above covers every active UK company in this sector, so the regional and revenue breakdowns reflect the full market rather than a sample. Explore closely related sectors below.
Frequently asked questions about energy companies in the UK
The full list of UK energy companies on this page covers every active business registered with Companies House. The live counter near the top shows the current total, updated continuously as new companies register and dormant ones are dissolved.
London is typically the largest concentration, followed by other major cities and counties. The full regional breakdown is shown in the table below the company list. Click any region to open a focused list of energy companies in that area.
Yes. Use the form on this page to request a free sample or a full export. Files are delivered as CSV or Excel and include company name, registered address, region, SIC code, employee size, revenue band, website and email where available.
Each entry on the UK energy companies list includes company name, Companies House registration number, registered address, region, SIC code(s), incorporation date, current status (active or dormant), employee size band, revenue band, website, phone number and email where available.
The list refreshes continuously from the UK companies register. New registrations, address changes, status changes and updated financial filings propagate to your downloaded list within days.
Yes. The list of UK energy companies can be exported as an email list or a postal mailing list for outbound campaigns. Filter by region, employee size and revenue band first to narrow your target segment, then request the export with email and address fields included.
Yes. Filter to a single city or town, pick multiple cities, or take a whole region. For city-specific pages, click any row in the regional breakdown below the main list.
Yes. Filter by region, employee size, revenue band and founding year to build a precise target list, then export with contact fields for outreach. All records are GDPR-compliant business information sourced from the public UK companies register.
