As of September 2026 Ioneer has a market cap of โน22.39 Billion. This makes Ioneer the world's 8859th 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 Ioneer was reported to be: