As of December 2025 Owens Corning has a market cap of ยฃ7.00 Billion. This makes Owens Corning the world's 2030th 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 9th, 2025 the market cap of Owens Corning was reported to be: