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

Constellation Energy Corporation (CEG) shares ended the last trading session 25.2% higher at $305.19. The jump came on an impressive volume with a higher-than-average number of shares changing hands ...

Constellation's USD26.6 billion acquisition of Calpine, the USA's largest generator of electricity from natural gas and ...