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

Key for Constellation was gaining a larger slice of the Texas market, where electricity demand is expected to grow at one of the fastest rates, said Joe Dominguez, chief executive

Constellation Energy Corp. shares surged to a record high after agreeing to acquire closely held Calpine Corp. for $16.4 billion in a deal that will create the largest fleet of US power stations.