The number of electricity and gas customers of the German-based energy company E.ON has decreased over the past few years. In 2023, the country supplied energy to approximately ** million people. E.ON's activities include the management of power supply networks and customer solutions.

E.ON was ranked first among the world's leading electric utilities companies in 2025, with annual sales of almost ** billion U.S. dollars. Italy's Enel followed, with sales revenue of almost ** billion U.S. dollars. What is an electric utility? Electric utilities are companies involved in the provision of electricity to customers. An electric utility company can be involved in one or more of the steps included in this process, namely generation, transmission, and distribution of electricity. Recent years have seen utility companies across the globe increasing their utilization of renewable energy sources. The largest renewable energy companies worldwide are located in the United States and Europe. European utilities leading the pack Six out of the top 10 leading electric utilities based on sales are located in Europe. E.ON, headquartered in Germany, had annual sales of approximately ***** billion U.S. dollars as of June 17, 2025. The British branch of E.ON is a member of the Big Six in the UK.