Constellation Energy is nearing a $30 billion deal to acquire power producer Calpine, a Houston operator of gas-fired power plants, per multiple reports. Why it matters This would force a major messaging shift for Constellation,

Constellation is in talks to buy Calpine in a transaction that would value the power company at close to $30 billion, including debt, the people said. The deal is exp

Constellation Energy Corp. is nearing an acquisition of Calpine Corp., people familiar with the matter said, in what would be one of the biggest ever deals in the power generation sector.