Who Owns Octopus Energy?

Octopus Energy is privately owned, with no single controlling shareholder. Its investors include the Octopus group that founded it, Origin Energy of Australia, CPP Investments, Tokyo Gas and Generation Investment Management, alongside management and employees. The register shows a restructuring three months ago: a new Octopus Energy Topco Limited took control on 12 June 2026. Ownership verified 6 September 2026.

Who owns the Octopus Energy brand?

The group company is OCTOPUS ENERGY GROUP LIMITED (09718624), incorporated 5 August 2015 and previously named Octopus Energy Limited and then Octopus Energy Holdings Limited.

Its person with significant control is Octopus Energy Topco Limited (16982052), holding 75% or more of shares and voting rights, notified 12 June 2026. That entry replaced Octopus Energy Holdco Limited (09718990), which had held 25–50% since 2016 and ceased on the same day.

The supply licence sits in a different company again: OCTOPUS ENERGY LIMITED (09263424) was incorporated on 14 October 2014 as Mercury Energy Supply Limited. Octopus bought and renamed an existing licensed supplier rather than starting from nothing.

Parent company and ultimate owner

There is no ultimate owner. Octopus Energy is private, has never floated, and its equity is spread across several institutions with none holding a majority.

Reported holdings put Octopus Energy Holdco — the Octopus group that founded the business — at around 37%, Origin Energy at roughly 22%, CPP Investments at about 11%, Tokyo Gas at about 10%, Generation Investment Management — the firm co-founded by Al Gore — at about 9%, and management and employees at around 9%.

None of those figures is on the UK register. The PSC regime records bands and only above 25%, so a shareholder register this evenly spread produces almost nothing at Companies House beyond the topco entry.

Brand owner vs operating company

The group is really two businesses. The energy supplier serves households in Britain and abroad. Kraken, the software platform Octopus built to run it, is licensed to other utilities worldwide and has become the more valuable half.

Kraken is being separated from the group. Transactions announced in December 2025 valued it at a reported $8.65bn in its first standalone funding round, with formal separation planned for the middle of 2026 — which is almost certainly what the new Topco structure recorded on 12 June 2026 exists to accomplish.

So a reader asking who owns Octopus Energy in a year’s time may need a different answer for the supplier and for Kraken.

When the ownership changed

Octopus Energy was founded in 2015 by Greg Jackson with James Eddison and Stuart Jackson, backed by Octopus Group, the investment company. It has grown by acquisition as well as by signing customers, taking on the collapsed Avro Energy’s customers in 2021 and acquiring Bulb out of special administration in 2022 — the largest supplier failure in British history.

Outside investment arrived in stages: Origin Energy in 2020, then Generation Investment Management, CPP Investments and Tokyo Gas, with Origin increasing its stake subsequently.

The register holds a small artefact from the start of the PSC regime: James Andrew Eddison and Stuart Keith Jackson each appear as people with significant control notified on 6 April 2016 and ceasing the same day — the standard same-day entry that marks a structure being put in order rather than any change of hands.

Related brands in the same group

The group includes Octopus Energy, Kraken Technologies, Octopus Energy Generation — which invests in wind and solar — and Octopus Electric Vehicles.

Two distinctions worth drawing. Octopus Investments and Octopus Real Estate are part of the wider Octopus Group, a separate investment business, not of the energy company. And Octopus Energy is not owned by any of the incumbent suppliers: it competes with Centrica’s British Gas, EDF, E.ON and the rest, all of which are separately owned.

Sources and verification

The company numbers, the previous names, the 12 June 2026 topco entry and the ceased 2016 founder entries are from the Companies House register.

The shareholder percentages are not register-verified. They come from Origin Energy’s disclosures to the Australian market, which are the most reliable public source because Origin must report its stake, and from company announcements. Private company valuations set in funding rounds are not market prices. Because the Kraken separation is in progress, this structure is likely to change — recheck company 09718624 before relying on it. Companies House does not verify most filed information.