Grizzle Victor Officer/Director Transaction Report

Victor Grizzle, Executive Chair, Director, and Officer of ARMSTRONG WORLD INDUSTRIES INC, reported a series of transactions on April 28, 2026. He acquired 72,823 shares of Common Stock through the conversion of Restricted Stock Units, with a reported price of $0 for the derivative security and $169.84 per share for the underlying common stock. Concurrently, he disposed of 31,671 shares of Common Stock, also valued at $169.84 per share. These transactions resulted in a post-transaction ownership of 537,493 shares following the acquisition and 505,822 shares after the disposal. The disposal of 31,671 shares was to cover tax obligations incurred upon the vesting of restricted stock units granted under the 2022 Equity and Cash Incentive Plan. These RSUs vest on the third anniversary of the grant, contingent on continued employment.