NewMarket Corporation is a specialty chemicals and advanced materials holding company operating through two main segments. Its petroleum additives segment, anchored by Afton Chemical, manufactures custom lubricant and fuel additives for global customers including major oil companies and refiners, supplying around 70% of the engine oil market and serving diverse industrial applications including electric vehicle transmission fluids. Its specialty materials segment produces ammonium perchlorate for aerospace propulsion systems through AMPAC and high-purity hydrazine propellants for satellite applications, serving U.S. defense, NASA, and commercial space customers with long-standing relationships built on product qualification and supply reliability. The company competes on technical expertise, formulation capability, differentiated products, and global manufacturing reach across North America, Europe, Asia, Africa, and Latin America.