As of September 2026 Owens Corning has a market cap of NZ$17.11 Billion. This makes Owens Corning the world's 2062th 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 Sep 18th, 2026 the market cap of Owens Corning was reported to be: