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Hawaiian Electric Industries is the parent company of three Hawaii-based regulated utilities and owns a 10% minority interest in Hawaii's American Savings Bank. The utilities provide electricity on the five islands of Oahu, Hawaii, Maui, Molokai, and Lanai.

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.

AES is a global power company that operates in 15 countries. Its generation portfolio totals over 32 gigawatts, including renewable energy (50%), gas (32%), coal (16%), and oil (2%). AES has majority ownership and operates six electric utilities distributing power to more than 2.5 million customers.

PG&E is a holding company whose main subsidiary is Pacific Gas and Electric, a regulated utility operating in Central and Northern California that serves 5.3 million electricity customers and 4.6 million gas customers in 47 of the state's 58 counties. PG&E operated under bankruptcy court supervision in 2001-04 during California's energy crisis and in 2019-20 due to wildfire losses. In 2004, PG&E sold its unregulated assets as part of its first postbankruptcy reorganization.