Constellation says that after merging with Calpine, it will be the biggest electric utility in America, with 2.5 million customers, and also the

Constellation Energy agreed to buy Calpine for $16.4 billion, combining two of the country’s largest electricity generators at a time when their product is in high demand from tech companies.Including the assumption of debt,

Constellation is buying power natural gas and geothermal power provider Calpine in a cash-and-stock deal valued at approximately $16.4 billion, joining together two of the country’s biggest power companies.