Energy Suppliers » All companies » Octopus Energy Ltd.
Octopus Energy Ltd. may sell electricity to both households and businesses, moves wholesale gas through the national pipeline system for onward sale to suppliers, and may sell gas to both households and businesses. It appeared on the Ofgem licensee register dated 10 August 2026 holding 3 licences.
Octopus Energy is the UK's largest domestic energy supplier, known for renewable electricity tariffs, smart time-of-use tariffs and its Kraken technology platform.
| Registered name (Ofgem register) | OCTOPUS ENERGY LTD. |
| Registered name (Companies House) | OCTOPUS ENERGY LIMITED |
| Company number | 09263424 |
| Company status | Active |
| Incorporated on | 14 October 2014 |
| Company type | Private limited company |
| Registered office | UK House, 5th Floor, 164-182 Oxford Street, London, United Kingdom, W1D 1NN |
| Nature of business (SIC) | 35140 – Trade of electricity |
| 35230 – Trade of gas through mains | |
| Previous names | MERCURY ENERGY SUPPLY LIMITED (until 21 Aug 2015) |
| Trustpilot rating | 4.8 out of 5 from 867,404 reviews |
| Reviews.io rating | 4.36 out of 5 from 9,917 reviews |
| Which? customer score | 74% (2026 survey) |
Licences held
| Market | Licence type |
|---|---|
| Electricity | Electricity Suppliers (Domestic and Non-Domestic) |
| Gas | Gas Shipper Licensees |
| Gas | Gas Suppliers (Domestic and Non-Domestic) |
Useful links
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Disclaimer: This directory is provided for general information only. It is based on the Ofgem licensee registers dated 10 August 2026 and details may have changed since. Licence lists are not formal public register documents and should not be relied upon. This is not a government website and we are not affiliated with Ofgem, Companies House, Trustpilot or any company listed. Always verify details with the company or the relevant official register before acting on them.