E.On Plans to Acquire Ovo Energy in Deal That Would Create Britain’s Largest Supplier

BBC Business reported Monday that German energy giant E.On has announced plans for an Ovo Energy takeover, a move that would vault the combined business past Octopus to become the United Kingdom’s largest domestic energy supplier.

A Deal That Reshapes the UK Energy Landscape

E.On currently serves around 5.6 million UK households. Ovo Energy adds roughly four million more customers to that figure. Together, the merged base would exceed that of Octopus, currently the country’s top supplier by customer count. The financial terms remain undisclosed, though earlier estimates placed the deal’s value at up to £600m. Both companies confirmed the two brands will continue operating independently while regulators review the transaction.

What Existing Ovo Customers Need to Know

Consumer advocates moved quickly to reassure Ovo’s customer base. Emily Seymour, energy editor at consumer group Which?, told BBC Business that supply would continue without interruption. She stressed that all existing tariffs, including fixed-rate contracts, will be honoured in full for their entire duration. Customers retain the right to switch supplier at any time. Sabrina Hoque, from price comparison platform Uswitch, added that any credit balances held by Ovo customers would be automatically transferred and fully protected should the acquisition receive regulatory approval.

Background: Consolidation in a Contested Market

The UK retail energy sector has undergone dramatic consolidation since the wave of supplier collapses that began in 2021. Dozens of smaller firms failed when wholesale gas prices surged, leaving millions of customers transferred to larger suppliers under the regulator’s safety-net process. Octopus grew rapidly through that period, absorbing several failed books. E.On itself expanded its UK footprint through the earlier integration of npower. The proposed Ovo deal continues that consolidation trend, concentrating the market further among a handful of scaled players.

Executives Frame Deal Around the Energy Transition

Marc Spieker, chief operating officer commercial at E.On, described the United Kingdom as a priority growth market. He pointed to electrification and grid flexibility as increasingly central to Europe’s energy future. Stephen Fitzpatrick, founder of Ovo, characterised the proposed deal as the logical next step for customers, staff and the broader shift toward zero-carbon energy. Regulatory review is expected to conclude later this year, at which point final approval could be granted.

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