As of February 2026 Rio Tinto has a market cap of A$276.18 Billion. This makes Rio Tinto the world's 93th 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 Feb 23rd, 2026 the market cap of Rio Tinto was reported to be: