As of December 2025 Armstrong World Industries has a market cap of โน714.55 Billion. This makes Armstrong World Industries the world's 2294th 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 5th, 2025 the market cap of Armstrong World Industries was reported to be: