Constellation Energy is set to acquire Calpine Corp. in a deal valued at $16.4 billion, marking one of the largest transactions in the electricity generation sector. The agreement includes $4.5 billion in cash and 50 million newly issued shares, with Calpine becoming a wholly owned subsidiary post-transaction. This acquisition will combine Constellation's extensive nuclear fleet with its natural gas operations, positioning the company to generate more electricity than any other firm in the United States. Following the announcement, Constellation Energy's stock surged by 25%. Additionally, the sellers, including Energy Capital Partners, anticipate profits exceeding $20 billion from the sale, although they may not fully realize these gains for over two years. Concurrently, New York is collaborating with Constellation to pursue Department of Energy funding for an advanced nuclear reactor at Nine Mile Point, as part of a broader initiative to enhance clean energy development.