09 E . ON Country : Germany

E . ON is a European holding company based in Düsseldorf , North Rhine-Westphalia , Germany that operates in 30 countries and serves over 26 million customers . The company formed in 2000 through the merger of energy companies VEBA and VIAG . Currently , E . ON is the world ’ s largest investor-owned energy service provider . E . ON

operates six nuclear power plants in Germany through its subsidiary E . ON Kernkraft GmbH . The company recently invested in California-based solar company Sungevity in order to bring their energy services to the Dutch market . E . ON is one of the 30 members of the DAX stock index of major German companies and Dr . Johannes Teyssen serves as E . ON ’ s CEO .

www . eon . com