Texas' surging growth in power demand was a big driver in the $26.6 billion deal to acquire Houston's largest private company.

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

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

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

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 companies.

CEG announces the acquisition of Calpine. This should help CEG provide a broader array of clean energy and sustainability solutions.

Constellation is buying natural gas and geothermal power provider Calpine for $16.4 billion ... include a significantly expanded presence in Texas, the fastest growing market for power demand ...

the Public Utility Commission of Texas and other regulatory agencies. Privately held Calpine is based in Houston. Shares of Constellation Energy Corp., based in Baltimore, surged more than 25% Friday.

Constellation is buying natural gas and geothermal power provider Calpine for $16.4 billion, joining together two of the country's biggest power companies.

Baltimore-based Constellation’s plans to acquire a Houston, Texas,-based natural gas  producer in a $26.6 billion deal will create one of the nation’s biggest energy firms at a time

Calpine's facilities are located mostly on the East Coast (mid-Atlantic and New England), Texas, and California. Also like Constellation, Calpine has a strong sales and marketing organization with ...

Constellation, based in Baltimore, has agreed to acquire Houston's Calpine Corp. in a deal that will create the nation's largest clean energy provider.