E.ON looks to acquire OVO and become one of the largest energy suppliers in the UK

05/10/2026: The Competition and Markets Authority has approved the proposed acquisition of OVO by E.ON. This will make E.ON the UK's largest energy supplier, with a customer base of 9.6 million.

The two brands will continue to operate separately for the time being, so if you're an OVO customer, there won't be any changes to your tariff, billing or account until further notice.

Any benefits that you receive off your bill, such as the Warm Home Discount, will also continue to be paid.

What had previously happened?

E.ON announced on 11 May 2026 that it was planning to acquire another of the UK’s main energy suppliers, OVO, in a significant investment by E.ON Group into the UK market, with the supplier citing accelerating consumer energy flexibility as a key goal.

At a time when energy prices remain a concern for many households, the merger between E.ON and OVO has the potential to connect resources and new technology to deliver better value to its customers across the country.

Marc Spieker, E.ON's chief operating officer, said: “The United Kingdom is an important growth market for E.ON, particularly for flexibility and customer‑focused energy solutions. The planned acquisition of Ovo strengthens our retail business.”

Chris Norbury, E.ON's UK chief executive, said: “For decades the UK energy system focused too much on those upstream. Now is our opportunity to change that. Solar, batteries, EVs and a retailer built to orchestrate. That is what this deal is about: customers in control and new energy that works for everyone.”

What should customers do?

There’s no immediate cause for action for customers of either E.ON or OVO, as the entire merger process will take time and be well communicated throughout.

However, given rising energy prices, now is as good a time as any to check the current market and see if you’re on the best energy deal for your home.