NewMarket Corporation (NewMarket) is a holding company and is the parent company of Afton Chemical Corporation (Afton), Ethyl Corporation (Ethyl), NewMarket Services Corporation (NewMarket Services), and NewMarket Development Corporation (NewMarket Development). Each of its the Company's subsidiaries manages its own assets and liabilities. Afton encompasses the petroleum additives business, while Ethyl represents the sale of tetraethyl lead (TEL) in North America and certain petroleum additives manufacturing operations. NewMarket Development manages the property that it owns in Virginia. NewMarket Services provides various administrative services to NewMarket, Afton, Ethyl, and NewMarket Development. The Company's business consists of one segment, petroleum additives, which is primarily represented by Afton. The TEL business of Ethyl is reflected in the 'All other' category. The 'All Other' also includes contract manufacturing performed by Ethyl.