As of October 2026 Rio Tinto has a market cap of ยฃ99.42 Billion. This makes Rio Tinto the world's 164th 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 29th, 2026 the market cap of Rio Tinto was reported to be: