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Con Ed is a holding company for Consolidated Edison of New York, or CECONY, and Orange & Rockland, or O&R. These utilities provide steam, natural gas, and electricity to customers in southeastern New York—including New York City—and small parts of New Jersey. The two utilities generate nearly all of Con Ed's earnings following the sale of its clean energy business to RWE in early 2023.

Southern is one of the largest utilities in the U.S. The company serves 9 million customers with vertically integrated electric utilities in three states and natural gas distribution utilities in four states. It owns 50 gigawatts of rate-regulated generating capacity, primarily for serving customers in Georgia, Alabama, and Mississippi. Subsidiary Southern Power owns 13 gigawatts of natural gas generation and renewable energy across the U.S. and sells the electricity primarily under long-term contracts.

Vistra Energy is one of the largest power producers and retail energy providers in the US Following the 2024 Energy Harbor acquisition, Vistra owns 41 gigawatts of nuclear, coal, natural gas, and solar power generation along with one of the largest utility-scale battery projects in the world. Its retail electricity business serves 5 million customers in 20 states, including almost a third of all Texas electricity consumers. Vistra emerged from the Energy Future Holdings bankruptcy as a stand-alone entity in 2016. It acquired Dynegy in 2018.

NRG Energy is one of the largest retail energy providers in the US, with 6 million customers. Vivint Smart Home, which NRG acquired in 2023, has 2 million home services customers. NRG also is one of the largest US independent power producers, with 13 gigawatts of coal, gas, and oil power generation capacity primarily in Texas. NRG exited Chapter 11 bankruptcy as a stand-alone entity in December 2003.