Form 4 Filing for ARMSTRONG WORLD INDUSTRIES INC

Barbara Loughran, a director at ARMSTRONG WORLD INDUSTRIES INC (AWI), acquired 876 shares of Common Stock on June 12, 2026. The acquisition was part of her annual grant of restricted stock units under the Issuer's nonemployee Director Compensation Program, with a grant date fair value of $154.21 per unit. These units vest on the earlier of the next annual shareholders meeting, the director's death or disability, or a Change in Control. Vested units can be acquired by the director at vesting or upon termination of service. Following this transaction, Loughran directly owns 9,744 shares.