As of January 2026 Owens Corning has a market cap of NZ$18.09 Billion. This makes Owens Corning the world's 1945th 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 Jan 15th, 2026 the market cap of Owens Corning was reported to be: