Calpine, the largest private company in Houston, announced a deal to be acquired by Baltimore-based Constellation for approximately $16.4 billion Friday morning. Constellation would buy Calpine ...

CEG set to pay mostly in stock, absorb $12 bln Calpine debt Deal talks advanced, could come as soon as Monday Would be largest U.S. power M&A deal since 2007 Calpine gas plants complement CEG's ...