As of December 2025 Constellation Energy has a market cap of ยฃ79.61 Billion. This makes Constellation Energy the world's 193th most valuable company by market cap according to our data. The market capitalization, commonly called market cap, is the total market value of a publicly traded company's outstanding shares and is commonly used to measure how much a company is worth.
On Dec 16th, 2025 the market cap of Constellation Energy was reported to be: