E.ON SE (marketed with an interpunct and lowercase letters as e·on) is a German electric utility company based in Essen, 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 age. The company is a component of the Euro Stoxx 50 stock market index, DAX stock index and a member of the Dow Jones Global Titans 50 index.