On Monday, Exelon and Constellation Energy made official their long-awaited $7.9 billion merger.
The combined nuclear power plant powerhouse and retail power and demand response leader will have a market cap of $34 billion and generate 34 gigawatts of power (19 gigawatts of it nuclear) to serve 38 states, parts of Canada and the District of Columbia.
That makes it the biggest power utility in the United States – but not for long.
Duke Energy’s proposed $26 billion merger with Progress Energy could create a six-state Southeast giant with 57 gigawatts of generation and 7 million customers.