As of September 2026 Ameren has a market cap of โฌ24.72 Billion. This makes Ameren the world's 863th 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 Sep 15th, 2026 the market cap of Ameren was reported to be: