NewMarket Corporation's Board of Directors elected Bruce R. Hazelgrove, III as a director, effective February 26, 2026. Mr. Hazelgrove currently serves as the Company's Executive Vice President and Chief Administrative Officer. He will not receive additional compensation for his board service. Mr. Hazelgrove will serve on the Executive Committee but will not serve on any other committees due to his non-independent status as a company officer. Information regarding Mr. Hazelgrove's related party transactions from the March 12, 2025 Definitive Proxy Statement is incorporated by reference.