As of December 2025 Alcoa has a market cap of A$18.88 Billion. This makes Alcoa the world's 1638th 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 Dec 18th, 2025 the market cap of Alcoa was reported to be: