NewMarket Announces the Election of Executive Vice President and General Counsel

Richmond, VA, December 16, 2024 - NewMarket Corporation (NYSE: NEU) (the "Company") announces today that Bryce D. Jewett III has been elected Executive Vice President and General Counsel, effective January 1, 2025. He had previously been serving as Vice President and General Counsel of the Company. Prior to joining the Company in 2020, Mr. Jewett was a Partner at McGuireWoods LLP where his practice focused on Mergers and Acquisitions.

NewMarket Corporation is a holding company operating through its subsidiaries Afton Chemical Corporation (Afton), Ethyl Corporation (Ethyl), and American Pacific Corporation (AMPAC). The Afton and Ethyl companies develop, manufacture, blend, and deliver chemical additives that enhance the performance of petroleum products. AMPAC is a manufacturer of specialty materials primarily used in solid rocket motors for the aerospace and defense industries. The NewMarket family of companies has a long-term commitment to its people, to safety, to providing innovative solutions for its customers, and to making the world a better place.

FOR INVESTOR INFORMATION CONTACT:
William J. Skrobacz
Investor Relations
Phone: 804.788.5555
Fax: 804.788.5688
Email: [email protected]