As of December 2025 Kaiser Aluminum has a market cap of NZ$3.03 Billion. This makes Kaiser Aluminum the world's 4917th 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 11th, 2025 the market cap of Kaiser Aluminum was reported to be: