Constellation is buying natural gas and geothermal power provider Calpine for $16.4 billion, joining together two of the country's biggest power companies. The acquisition would create the nation’s leading retail electric supplier,

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

Baltimore-based energy company Constellation’s plans to acquire a Houston, Texas-based natural gas producer in a $26.6 billion deal will boost the nation’s biggest energy firm right as the U.S. faces skyrocketing demand for power sources for a booming tech sector.

Combined, they will have a capacity of 60 gigawatts from nuclear, natural gas, geothermal, hydro, wind, solar, cogeneration and battery storage.

The Canada Pension Plan Investment Board is selling its stake in Texas-based electricity producer Calpine Corp. for cash and stock, reaping a significant windfall in a deal that will see Constellation Energy Corp. CEG-Q acquire Calpine for US$16.4-billion.

Constellation Energy shares could remain in focus on Monday after surging more than 25% Friday as the energy giant announced that it will acquire rival Calpine in a deal valued at $26.6 billion. Monitor these key chart levels.

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

Pennsylvania and Virginia. The buyout will also create the Constellation will buy Calpine with 50 million of its shares and $4.5 billion in cash. It will also assume about $12.7 billion in Calpine ...