Disclosure on California Transparency in Supply Chains Act of 2010

NewMarket Corporation (“NewMarket”) together with its subsidiaries, Afton Chemical Corporation and Ethyl Corporation, is firmly opposed to any form of forced labor, human trafficking and slavery. NewMarket does not condone any such unlawful conduct by its employees, suppliers, service providers and other business partners. NewMarket has adopted a Policy against Slavery and Human Trafficking.

NewMarket requires that all suppliers and service providers comply with all applicable laws, including those local laws relating to labor practices and forced labor. In the event that a credible report is received, NewMarket will conduct an investigation and take appropriate action to ensure compliance with local law.

NewMarket will conduct compliance training, including training on the California Transparency in Supply Chains Act of 2010, for its employees who have responsibility for supply chain management.

If you require additional information regarding NewMarket’s Policy or have a concern related to a supplier or service provider’s labor practices, contact the NewMarket Integrity Hotline: 1-800-932-5378 (toll-free in the United States), + 800-932-5378 if you are outside of the United States, or at https://www.compliance-helpline.com/welcomePageNewMarket.jsp. Communication with NewMarket’s Integrity Hotline is confidential.