Key TakeawaysConstellation Energy shares surged Friday after the company agreed to buy private energy company Calpine in a deal valued at $26.6 billion. The move expands Constellation's presence in California and Texas, creating the largest clean energy provider in the U.S.The acquisition comes as energy stocks have surged over the past year, due in part to power demands from data centers to support artificial intelligence. Constellation Energy (CEG) shares surged Friday after the company agreed to buy priv ...