Constellation Energy is the largest nuclear power generator in the United States, operating approximately 21,000 MW of carbon-free nuclear capacity across 21 plants in 12 states. Key deals include the September 2024 Microsoft 20-year 837 MW PPA for the Three Mile Island restart (Crane Clean Energy Center), and a June 2025 Meta agreement for Braidwood Illinois nuclear power. The $1.6 billion TMI restart received a $1 billion DOE loan in November 2025. Constellation is pursuing a licence renewal extending TMI to at least 2054.
Public investors