The company is betting that data-center owners will be hungry for all sorts of power—from nuclear to conventional.

Baltimore-based Constellation, the nation’s largest operator of nuclear power plants, is acquiring Calpine Corp.

U.S. nuclear power provider Constellation Energy on Friday agreed to buy privately-held natural gas and geothermal company ...

Baltimore's Constellation Energy buying Calpine in a deal that joins two huge U.S. power companies George W. Bush gave fellow ...

Constellation Energy announces acquisition of Calpine, creating America's largest clean energy provider.

Constellation is buying power natural gas and geothermal power provider Calpine for $16.4 billion, joining together two of ...

Constellation says that after merging with Calpine, it will be the biggest electric utility in America, with 2.5 million ...

Constellation Energy Corp., an electricity provider whose stock has doubled over the last year on hopes it will help meet the ...

Separately, Calpine and Constellation are already among the largest power generation companies in the country.

Constellation Energy agreed to buy Calpine for $16.4 billion, combining two of the country’s largest electricity generators ...

Constellation Energy struck a $26.6 billion deal to buy Calpine, uniting two of the U.S.'s largest power generators amid ...

Constellation Energy is nearing a roughly $30 billion deal to acquire power producer Calpine, people familiar with the matter ...