Headquartered in Baltimore, Maryland and launched as a standalone company in 2022 following its separation from Exelon, Constellation Energy (NASDAQ: CEG) is a Fortune 200 company and the largest producer of clean, carbon-free energy in the United States, with 13,000+ employees. Constellation operates roughly 55 gigawatts of generating capacity spanning nuclear, wind, solar, hydro, and geothermal facilities, enough to power the equivalent of 27 million homes, and it supplies about 10% of the nation’s clean energy. Following its 2026 acquisition of Calpine, Constellation significantly expanded its clean generation fleet.