Yahoo Finance

Ameren owns rate-regulated generation, transmission, and distribution networks that deliver electricity and natural gas through the company's two main subsidiaries, Ameren Missouri and Ameren Illinois. It serves 2.5 million electricity customers and 900,000 natural gas customers across its two service territories.

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.

Entergy is a holding company with five regulated vertically integrated utilities that generate and distribute electricity to 3 million customers in Arkansas, Louisiana, Mississippi, and Texas. It is one of the largest power producers in the country with 27 gigawatts of rate-regulated owned and leased power generation capacity. Entergy was the second-largest nuclear owner in the US before it began retiring and selling its plants in the Northeast in 2014. It sold its two small gas utilities in Louisiana in 2025.

DTE Energy is a Detroit-based diversified energy company with gas and electric operations including generation, transmission, and distribution. Its subsidiaries include Detroit Edison, an electric utility serving 2.3 million customers in Southeastern Michigan; MichCon, a natural gas utility serving 1.3 million customers in Michigan; and other nonutility energy trading, fuel transportation, and marketing businesses. The company currently has one nuclear generating facility. In 2021, DTE completed the spinoff of its midstream gas pipeline operations. Total revenues in 2025 topped $15.8 billion, of which 56% was from utility operations. DTE's fuel mix is approximately 41% coal, 19% nuclear, 26% natural gas, and about 14% renewable sources. The company is expanding its use of renewable fuels. It is more reliant on coal than some peers, but expects to finish completing the conversion to natural gas from coal at its Belle River plant by 2026 and at its Monroe plant by 2040. DTE retired the Trenton Channel and St. Clair coal power plants in 2022. It is also targeting net-zero carbon emissions by 2050. The company's market capitalization is just under $30 billion.