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Eversource Energy is a diversified holding company with subsidiaries that provide rate-regulated electric, gas, and water distribution service to more than 4 million customers in the Northeast U.S. The company expanded its service territories with acquisitions of NStar (2012), Aquarion (2017), and Columbia Gas (2020). Eversource is exiting its 50% partnership with European utility Orsted to develop 2 gigawatts of offshore wind projects in the Northeast U.S. The company exited most of its unregulated businesses in 2006.

American Electric Power is one of the largest regulated utilities in the United States, providing electricity generation, transmission, and distribution to more than 5 million customers in 11 states. About 42% of AEP's of capacity is coal, with the remainder from a mix of natural gas (27%), renewable energy and hydro (21%), nuclear (8%), and demand response (2%). Vertically integrated utilities, transmission and distribution, and generation and marketing support earnings.

FirstEnergy is an investor-owned holding company with 10 regulated distribution utilities across six mid-Atlantic and Midwestern states. FirstEnergy also owns and operates one of the nation's largest electric transmission systems.

Avangrid operates two business units, Networks and Renewables. Networks operates eight regulated electric and natural gas utilities across New York, Maine, Connecticut, and Massachusetts, serving over 3 million customers. Renewables has historically focused on developing onshore wind projects but is looking to make developments in solar and offshore wind over the next five years. It operates nearly 8.6 gigawatts of renewable energy projects across the U.S. Spanish utility Iberdrola spun off Avangrid's predecessor, Iberdrola USA, in 2015. Iberdrola owns 81.6% of Avangrid and has proposed to acquire the remaining shares.