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Constellation Completes Calpine Transaction
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Constellation today announced that it has completed its acquisition of Calpine Corporation from Energy Capital Partners (ECP), "creating the nation's largest producer of electricity."
The combined company serves 2.5 million retail and business customers nationwide and has 55 gigawatts of capacity
Constellation said, "By uniting Constellation's zero-emission nuclear fleet with Calpine's industry-leading natural gas and geothermal generation, the company is building the foundation for America's next great era of innovation -- powering the data centers, advanced manufacturing facilities and critical infrastructure that will define the AI age and secure the nation's economic leadership."
"The acquisition also strengthens Constellation's footprint in high-demand regions, including Texas and California, while maintaining significant operations in Illinois, Maryland, New York and Pennsylvania," Constellation said
Andrew Novotny, president and CEO of Calpine, said, "Our expanded capabilities will allow us to better serve customers and communities, enable investment in critical infrastructure and support national priorities for energy security, economic competitiveness and technological leadership."
The company will maintain headquarters in Baltimore and a "significant presence" in Houston
Constellation had previously announced various senior leadership appointments and changes upon transaction close (story here)
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January 7, 2026
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Copyright 2026 EnergyChoiceMatters.com
Reporting by Paul Ring • ring@energychoicematters.com
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