The three largest electric energy companies in the United States are Duke Energy, NextEra Energy and Domnion Resources, as of April 2015. Rankings are based on market value.
Duke Energy is an electric company based in North Carolina and has a market value of $55.4 billion. Duke Energy serves approximately 7.3 million customers.
NextEra is the largest electricity provider in Florida and has a market value of $46.9 billion. NextEra claims to be the largest producer of energy from wind and the sun in North America.
Dominion Resources is based in Richmond, Virginia, and has a market value of $42.8 billion. Dominion serves customers in Virginia, Ohio, North Carolina and West Virginia.