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

Constellation Energy Corporation announced its acquisition of Calpine Corporation in a $16.4 billion cash and stock transaction, creating the largest clean energy provider in the U.S. This ...

Baltimore-based Constellation Energy, the nation’s largest operator of nuclear power plants, is acquiring Calpine Corp. in a cash and stock transaction valued at $16.4 billion, the company ...