As of October 2026 Rio Tinto has a market cap of A$220.60 Billion. This makes Rio Tinto the world's 141th 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 9th, 2026 the market cap of Rio Tinto was reported to be: