As of February 2026 Ameren has a market cap of โน2.567 Trillion. This makes Ameren the world's 861th 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 Feb 6th, 2026 the market cap of Ameren was reported to be: