SEC Filing Summary

Mark A. Hershey, President & CEO of ARMSTRONG WORLD INDUSTRIES INC, reported a transaction on April 8, 2026. He acquired 13,423 shares of Common Stock through the conversion of performance-based restricted stock units (RSUs) which vested after the performance period of January 1, 2023, to December 31, 2025, subject to pre-established performance conditions. The RSUs were granted on March 1, 2023, under the 2022 Equity and Cash Incentive Plan. Following this acquisition, Mr. Hershey acquired 13,423 shares. Additionally, he disposed of 5,839 shares of Common Stock, with 13,423 shares withheld by the issuer to cover tax obligations. Post-transaction, Mr. Hershey directly owns 64,777 shares of common stock.