As of December 2025 FirstEnergy has a market cap of โฌ21.92 Billion. This makes FirstEnergy the world's 903th 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 10th, 2025 the market cap of FirstEnergy was reported to be: