As of May 2026 Armstrong World Industries has a market cap of โน663.90 Billion. This makes Armstrong World Industries the world's 2569th 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 May 4th, 2026 the market cap of Armstrong World Industries was reported to be: