As of February 2026 Ioneer has a market cap of A$0.42 Billion. This makes Ioneer the world's 8027th 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 Jan 31st, 2026 the market cap of Ioneer was reported to be: