As of September 2026 Alcoa has a market cap of A$16.46 Billion. This makes Alcoa the world's 1821th 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 Sep 19th, 2026 the market cap of Alcoa was reported to be: