Weighted-Average Shares Outstanding (Diluted): The number of shares held by shareholders including insiders but not including a company's treasury shares assuming conversion of all convertible debt, securities, warrants and options, sourced from the company 10-K or 10-Q SEC reports.

Armstrong World Industries, Inc. (AWI) had Weighted-Average Shares Outstanding (Diluted) of 43.60M for the most recently reported fiscal year, ending 2025-12-31.