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10-K primary document
NEU · Annual Report (Form 10-K) · Filed February 12, 2026

Newmarket Corp10-K exhibit

neu-20251231xex21subsidiar.htm
Document

Exhibit 21

The following is a list of the subsidiaries of the registrant as of February 12, 2026. Each such subsidiary does business under its corporate name.









































SubsidiaryJurisdiction of Incorporation
Afton Argentina Services SRLArgentina
Aditivos Mexicanos S.A. de C.V.Mexico
Afton Chemical Additives CorporationVirginia
Afton Chemical Arabia, LLCKingdom of Saudi Arabia
Afton Chemical Asia Pacific LLCVirginia
Afton Chemical Asia Pte. Ltd.Singapore
Afton Chemical (Beijing) Co., Ltd.China
Afton Chemical Canada CorporationCanada
Afton Chemical Canada Holdings, IncVirginia
Afton Chemical CH Holdings S.à.r.l.
Luxembourg
Afton Chemical CorporationDelaware
Afton Chemical de Mexico S.A. de C.V.Mexico
Afton Chemical EA Holdings S.à.r.l.
Luxembourg
Afton Chemical France succursale D'Afton Chemical SRLFrance
Afton Chemical GmbHGermany
Afton Chemical India Private LimitedIndia
Afton Chemical Industria de Aditivos LtdaBrazil
Afton Chemical Intangibles LLCVirginia
Afton Chemical International Holdings S.à.r.l.Luxembourg
Afton Chemical Japan CorporationJapan
Afton Chemical Korea Co., Ltd.Korea
Afton Chemical LimitedUnited Kingdom
Afton Chemical Mexico Holdings LLCVirginia
Afton Chemical North Africa SARL AUMorocco
Afton Chemical SRLBelgium
Afton Chemical (Suzhou) Co., Ltd.China
Afton Chemical Switzerland GmbHSwitzerland
Afton Chemical UK Holdings LimitedUnited Kingdom
Afton Chemical UK LLPUnited Kingdom
Afton Cooper LimitedUnited Kingdom
Ethyl Canada Holdings, Inc.Virginia
Ethyl Canada Inc.Canada
Ethyl CorporationVirginia
Foundry Park I, LLCVirginia
Foundry Park II, LLCVirginia
Gamble’s Hill, LLCVirginia
Gamble’s Hill Lab, LLCVirginia
Gamble’s Hill Landing, LLCVirginia
Gamble’s Hill Third Street, LLCVirginia
Gamble’s Hill Tredegar, LLCVirginia
Lewistown Road, LLCVirginia
NewMarket Development CorporationVirginia
NewMarket Investment CompanyVirginia
NewMarket Services CorporationVirginia
Old Town LLCVirginia
Servicios Afton de Mexico, S.A. de C.V.Mexico
The Edwin Cooper CorporationVirginia
NewMarket Specialty Materials, LLCDelaware



American Pacific CorporationDelaware
American Pacific CorporationNevada
AMPAC Farms, Inc.Nevada
American Azide CorporationNevada
Mars TopCo, LLCDelaware
Mars Intermediate, LLCDelaware
Calca Solutions, LLCDelaware
Calca Neutralizing Solutions, LLCDelaware

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