5 Biggest Energy Companies in the UK

4. E.ON (E.ON Energy UK)

2021 Revenue: $91.522 billion

E.ON is German electric multinational that owns one of the UK’s largest energy companies, E.ON Energy UK. According to the company, E.ON Energy UK is one of the UK’s leading energy providers with 8,000 employees and 5.6 million customers in the country. Given its focus on renewables, E.ON Energy UK has invested £3.5 billion in UK renewables since 2009 and the company will likely invest even more in the future.

Like E.ON Energy UK, E.ON is also a leading utility company given it is one of Europe’s largest operators of energy networks and energy infrastructure. In 2021, E.ON reported revenue of $91.522 billion, making it one of the largest companies in the world.