Constellation is buying power natural gas and geothermal power provider Calpine in a cash-and-stock deal valued at approximately $16.4 billion, joining together two of the country’s biggest power comp ...

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

Constellation will acquire power company Calpine for $16.4 billion, linking two of the nation's biggest power companies.

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

Constellation Energy’s deal to buy Calpine is being driven by fast-rising demand for electricity by the technology industry.

Key for Constellation was gaining a larger slice of the Texas market, where electricity demand is expected to grow at one of ...

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