NEWMARKET CORP

NewMarket Corporation (NewMarket) (NYSE: NEU) is a holding company and is the parent company of Afton Chemical Corporation (Afton), Ethyl Corporation (Ethyl), American Pacific Corporation (AMPAC), Calca Solutions, LLC (Calca), NewMarket Services Corporation (NewMarket Services), and NewMarket Development Corporation (NewMarket Development). We acquired Calca on October 1, 2025. Each of our subsidiaries manages its own assets and liabilities. Afton manufactures and sells petroleum additives, while Ethyl markets antiknock compounds in North America and performs contracted manufacturing and related services. AMPAC is a manufacturer of specialty materials primarily used in solid rocket motors for the aerospace and defense industries, and Calca is a producer of hydrazine products used primarily in aerospace and defense applications. NewMarket Development manages the real property that we own in Virginia. NewMarket Services provides various administrative services to NewMarket, Afton, Ethyl, AMPAC, Calca, and NewMarket Development. NewMarket Services expenses are billed to each subsidiary pursuant to services agreements between the companies. References in this Annual Report on Form 10-K to we, us, our, and NewMarket are to NewMarket Corporation and its consolidated subsidiaries, unless the context indicates otherwise. As a specialty chemicals company, Afton develops and manufactures highly formulated lubricant and fuel additive packages and markets and sells these products worldwide. Afton is one of the largest lubricant and fuel additives companies in the world.