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.

E.ON

E.ON SE marketed with an interpunct as E·ON, is a European holding company based in Düsseldorf, North Rhine-Westphalia, Germany. It runs one of the world's largest investor-owned electric utility service providers. The name comes from the Greek word aeon which means eternity. The company is a component of the Euro Stoxx 50 stock market index.

It operates in over 30 countries and serves over 33 million customers. It is one of the 30 members of the DAX stock index of major German companies and a member of the Global Titans 50 index. Its chief executive officer (Vorstandsvorsitzender) is Dr. Johannes Teyssen.

The E.ON group split into 2 independent companies following completion of the so-called 1-to-2 project on Jan 1st 2016. The E.ON brand continues 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.