As of December 2025 FirstEnergy has a market cap of S$33.61 Billion. This makes FirstEnergy the world's 886th 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 5th, 2025 the market cap of FirstEnergy was reported to be: