Constellation is buying power natural gas and geothermal power provider Calpine in a cash-and-stock deal valued at ...

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 ...

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

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

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

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

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.

The $16.4 billion purchase agreement would combine the biggest U.S. nuclear operator with Calpine’s natural gas assets.

Constellation Energy Group, Ins. (CEG) and Calpine Corp. (CPN) announced Friday they have entered into a definitive agreement under ...