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

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.

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

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

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

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

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

Competitive generation giant Constellation has agreed to acquire Calpine Corp. in a $16.4 billion deal that is set to create ...

Constellation Energy, already the biggest US nuclear plant operator, also will become the largest independent power provider in the US after agreeing to buy Calpine, sending shares up 25%.

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

Constellation and Calpine announced they have entered into a definitive agreement under which Constellation will acquire Calpine in a cash and ...