E.ON UK

E.ON UK (formerly Powergen) is an energy company in the United Kingdom and a subsidiary of E.ON, the world's largest investor-owned power and gas company. As Powergen, it was listed on the London Stock Exchange and was once a constituent of the FTSE 100 Index but since 1 July 2002 has been owned by E.ON SE of Germany.

It was formerly a vertically integrated utility company with interests in electrical generation, electricity distribution in the Midlands region, and in the electricity and gas supply markets. However, since restructuring and sales, E.ON UK is now a retail business with support functions.

Other E.ON business, with bases in the UK but not part of E.ON UK, include Gas Storage, Climate and Renewables, New Build and Technology and Energy Trading.

E.ON UK, as part of E.ON group will be split into 2 independent companies following the announcement in 2014. The E.ON brand will continue to service the downstream business including retail and distribution, as well as the Climate and Renewables business; with the Upstream business, to be branded Uniper, containing all conventional power generation and current Energy Trading activities.