Producer
Constellation Energy (Everett LNG)
Constellation Energy Corporation (Nasdaq: CEG; Baltimore MD; spun off from Exelon in 2022) is the largest US nuclear power operator, producing approximately 10% of US electricity from 21 nuclear power plants (~32,000 MW capacity). Fleet includes Byron, Braidwood, Calvert Cliffs, Clinton, Dresden, Ginna, Hope Creek, LaSalle, Limerick, Nine Mile Point, Peach Bottom, Quad Cities, and Three Mile Island (restarted September 2023 under a 20-year power purchase agreement with Microsoft specifically for data center power in the mid-Atlantic grid — the first ever single-company restart of a nuclear reactor driven by hyperscaler AI power demand).
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Nuclear Power Generation (Dominant)
90%Clean Energy Solutions
8%Legacy LNG (Everett Terminal)
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Did you know2023
Constellation Energy restarted Three Mile Island Unit 1 in September 2023 under a 20-year Power Purchase Agreement with Microsoft Corporation — the first time in US history that a nuclear power plant was restarted primarily due to demand from a single corporate technology customer requiring zero-carbon power for data centers. Microsoft signed a 20-year contract specifically to restart TMI-1 (which had been shut since 2019 for economic reasons) to supply its mid-Atlantic data centers. The deal established a new economic model for nuclear power: rather than selling into wholesale electricity markets at market prices, a hyperscaler data center operator commits to a long-term contract at a fixed price, providing the financial certainty to justify a $1.6B nuclear restart. The same Three Mile Island that caused the most significant US nuclear incident in 1979 (TMI-2 partial meltdown) had Unit 1 running until 2019, shut for 4 years, and was restarted by Microsoft's AI server power demand in 2023. Artificial intelligence training demand directly resurrected a nuclear power plant.
Constellation Energy Corporation ↗