Constellation Energy Corporation CEG and Calpine Corp. announced that they have entered into a definitive agreement under ...

Constellation, the nation’s largest operator of nuclear power plants, said Friday it agreed to purchase Calpine Corp. for $16.4 billion through 50 million shares of Constellation stock and $4.5 ...

Exxon Mobil (XOM) announced an agreement with Calpine Corporation, which it identifies as “the nation’s largest producer of electricity from natural gas,” to transport and permanently store ...

Constellation Energy said today it would buy privately held Calpine Corp, a geothermal and natgas energy company, in a cash-and-stock deal valued at $26.6 billion including debt, sending ...