Constellation Energy Corporation

Constellation Energy Corporation is the largest producer of clean carbon-free energy in the United States. Headquartered in Baltimore, Maryland since its founding as an independent entity in 2022 after being spun off from Exelon Corporation, Constellation operates a diverse fleet of nuclear, hydroelectric, wind and solar facilities that collectively provide over 32 gigawatts of capacity—enough to power more than 16 million homes. Nearly 90% of its annual output is carbon-free electricity.
The company serves approximately two million customers across North America—including residential users as well as three-fourths of Fortune 100 companies—offering integrated solutions that span electricity/natural gas procurement to advanced sustainability consulting. Constellation has been at the forefront of innovative clean-energy offerings such as real-time carbon-free matching products for organizations seeking to decarbonize their operations.
In addition to its core business lines supplying power and natural gas at both wholesale/retail levels nationwide—including through regulated utility Baltimore Gas & Electric—the company partners with Sunrun to deliver residential rooftop solar installations in several states. Constellation’s ongoing investments include upgrading existing nuclear plants for higher output and acquiring new assets like Calpine’s geothermal/natural-gas portfolio pending regulatory approval.
With over $23 billion in annual revenue (2024), more than 14 thousand employees nationwide, strong commitments to community engagement ($20M+ donated annually), workforce development programs and ambitious climate action targets—Constellation stands out as a leader accelerating America’s transition toward reliable zero-carbon electricity.