5 Biggest Nuclear Energy and Reactor Companies in the World

4. Duke Energy Corporation (NYSE:DUK)

Market Cap as of January 01, 2022: $79.3 billion

Duke Energy Corporation (NYSE:DUK) is one of the largest utility companies in the United States and serves customers in six states: North Carolina, South Carolina, Florida, Indiana, Kentucky, and Ohio. Its nuclear sector includes 11 nuclear units at six sites in South Carolina and North Carolina. With a capacity of about 10,700 MW, these nuclear facilities provide electricity to half of its Carolina customer base boasting one of the lowest production costs in the country.