On January 27, 2026, Armstrong World Industries, Inc. and Austin K. So, the Company?s Senior Vice President, General Counsel, Head of Government Relations & Chief Sustainability Officer, Secretary, finalized their mutual agreement regarding his separation, effective April 1, 2026. This separation aligns with a broader board and management transition, which will also be effective April 1, 2026, including the previously announced appointments of a new Executive Chair of the Company?s Board of Directors and a new President and Chief Executive Officer.