Octopus Energy Group is a British renewable energy group. It was founded in 2015 with the backing of Octopus Group, a British asset management company. Headquartered in London, the company has operations in the United Kingdom, France, Germany, Italy, Spain, Australia, Japan, New Zealand and the United States. Octopus is the UK's largest supplier of electricity to domestic customers, and the second largest in domestic gas.
Octopus Energy Group operates a range of business divisions including Octopus Energy Retail, Octopus Energy for Business, Octopus Energy Services, Octopus Electric Vehicles, Octopus Energy Generation, Octopus Heating, and Kraken Technologies, and supports the independent not-for-profit think-tank Centre for Net Zero. The company also supplies software services to other energy suppliers.