As of January 2026 FirstEnergy has a market cap of C$35.49 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 31st, 2025 the market cap of FirstEnergy was reported to be: