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America's largest gas and electric utilities based on revenue 2019

Exelon Corporation was ranked as the largest gas and electric utility in the United States, based on revenues in 2019. Exelon generated approximately 34.4 billion U.S. dollars in FY 2019. The utility was also considered one of the largest publicly traded companies in its state, Illinois; Exelon is headquartered in Chicago, Illinois. Duke Energy and Southern were ranked second and third, respectively during this same period.

Exelon as a utility

The Exelon Corporation was formed in 2000 during the merger of Philadelphia’s PECO Energy and Chicago’s Unicom Corp. Exelon is one of the largest operators of nuclear power plants in the United States and serves about 10 million customers across most states and parts of Canada. Exelon Corporation has regulated utilities located in Illinois, Pennsylvania, Maryland, Delaware, New Jersey, and Washington D.C. It has several main operating subsidiaries including Exelon Generation, a deregulated energy generator, and the Constellation Energy Group, a deregulated energy supplier. Its Constellation business unit provides energy to residential, commercial, and public customers.

What do utilities do?

A utility maintains the infrastructure that provides a public service, such as electricity and water, and is regulated by public entities ranging from local community groups to statewide government monopolies. An electric utility is generally involved in the generation of electricity and the distribution of electricity for sale to customers. Globally, Hong Kong’s Towngas was considered one of the largest natural gas utilities with a market value of 36.2 billion U.S. dollars.

Largest gas and electric utilities in the United States in FY 2019, based on revenue

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Release date



United States

Survey time period

FY 2019

Supplementary notes

According to the source, all figures are based on most current 10-K filings or comparable company data. Data shown are for the FY ended on or before January 31, 2020.
The figures have been rounded.

To access figures: select "Utilities: Gas and Electric" from the dropdown menu.

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Statistics on "Electric utilities in the U.S."

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