Form 4 Filing for ARMSTRONG WORLD INDUSTRIES INC

On April 8, 2026, Michael Carl Winters, SVP, Arch Spec & Bus Dev of ARMSTRONG WORLD INDUSTRIES INC (AWI), reported transactions involving the company's common stock. Winters acquired 3,742 shares of common stock through the conversion of performance-based restricted stock units (RSUs) which vested based on pre-established performance conditions certified on April 8, 2026. The RSUs were granted under the 2022 Equity and Cash Incentive Plan, with a performance period from January 1, 2023, to December 31, 2025. Each RSU represented a contingent right to one share of common stock. Concurrently, Winters disposed of 1,629 shares to cover tax obligations amounting to $281,627.93, based on a price of $172.77 per share. Following these transactions, Winters directly holds 2,748 shares of ARMSTRONG WORLD INDUSTRIES INC common stock.