Constellation Energy Corporation is a premier independent power producer and retail energy supplier in the United States. Spun off from Exelon Corporation in 2022, Constellation operates the nation's largest fleet of nuclear power plants, which forms the backbone of its carbon-free generation strategy. Following its early 2026 acquisition of Calpine Corporation, Constellation's generation portfolio boasts 55 gigawatts of capacity, comprising nuclear, natural gas, geothermal, wind, solar, and hydroelectric assets, making it the largest private-sector power producer in the world. Constellation operates through regional segments including the Mid-Atlantic, Midwest, New York, and ERCOT (Texas). The company generates revenue by selling wholesale electricity into competitive markets and providing retail electricity, natural gas, and sustainable energy solutions to distribution utilities, municipalities, and over two million commercial, industrial, and residential customers. Constellation is uniquely positioned to benefit from the surging electricity demand driven by data centers and artificial intelligence, leveraging its highly reliable, baseload nuclear generation to secure long-term power purchase agreements with major technology companies.
