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 chemicals used in solid rocket motors for the aerospace and defense industries. Its petroleum additives segment includes lubricant and fuel additives. Its specialty materials segment includes critical materials used in solid rocket motors for space launch and military defense applications. Ethyl provides contracted manufacturing and related services to Afton and to third parties and is a marketer of antiknock compounds in North America. The Company is also a producer of UltraPure and high-purity hydrazine, which are essential, mission-critical propellants that enable advanced aerospace and defense applications.