As of December 2025 Kaiser Aluminum has a market cap of $1.69 Billion USD. This makes Kaiser Aluminum the world's 4970th 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 6th, 2025 the market cap of Kaiser Aluminum was reported to be: