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 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 ...

Microsoft signed a deal with Constellation last year to fulfill its growing need for electricity for its data centers. Barron ...

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

Constellation Energy Group Inc. has agreed to buy a Texas company in a deal worth more than $26 billion that will create one ...

Houston's largest private company will be acquired by a publicly traded utilities company based in Baltimore in a deal worth ...

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

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%.