Octopus Energy

Octopus Energy Group Limited (formerly Octopus Energy Limited and Octopus Energy Holdings Limited), known as Octopus Energy, is a British company operating in the fields of energy generation and supply.

It was founded in 2015 with the backing of Octopus Group, a British asset management company.

Headquartered in London, it has operations in the United Kingdom, France, Germany, Italy, Spain, Australia, Japan, New Zealand and the United States.

Octopus Energy is the UK's largest supplier of domestic electricity and gas, with customers in 7.7 million households as of December 2025.

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 not-for-profit think-tank Centre for Net Zero. The group also supplies software services to other energy suppliers.

Octopus Energy was established in August 2015 as a subsidiary of Octopus Group. Trading began in December 2015. Greg Jackson is the founder of the company and holds the position of chief executive.

By April 2018, the company had 198,000 customers and had made an energy procurement deal with Shell. Later in 2018, Octopus gained the 100,000 customers of Iresa, under Ofgem's "supplier of last resort" process, after Iresa ceased trading. The same year, Octopus replaced SSE as the energy supplier for M&S Energy, a brand of Marks & Spencer, and bought Affect Energy, which had 22,000 customers.

In 2018 Hanwha Energy Retail Australia (Nectr) chose the Kraken platform, developed by Octopus to provide billing, CRM and other technology services to support its launch into the Australian retail energy market.