As of November 2026 Ameren has a market cap of A$43.49 Billion. This makes Ameren the world's 802th 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 Oct 31st, 2026 the market cap of Ameren was reported to be: