As of June 2026 Ioneer has a market cap of ยฃ0.23 Billion. This makes Ioneer the world's 8209th 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 Jun 19th, 2026 the market cap of Ioneer was reported to be: