As of December 2025 Century Aluminum has a market cap of NZ$5.02 Billion. This makes Century Aluminum the world's 3982th 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 5th, 2025 the market cap of Century Aluminum was reported to be: