Exhibit 99.1
NEWMARKET CORPORATION INCREASES QUARTERLY DIVIDEND
Richmond, VA, February 26, 2026 - The Board of Directors of NewMarket Corporation (NYSE: NEU) declared a quarterly dividend in the amount of $3.00 per
share on the common stock of the Corporation. The dividend is payable April 1, 2026, to NewMarket shareholders of record at the close of business on March 16, 2026.
NewMarket Corporation is a holding company operating through its subsidiaries, Afton Chemical Corporation (Afton), Ethyl Corporation (Ethyl), American Pacific
Corporation (AMPAC) and Calca Solutions, LLC (Calca). 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 materials
primarily used in solid rocket motors for the aerospace and defense industries. Calca is the nation’s leading producer of UltraPure and high-purity hydrazine – essential, mission-critical propellants that enable advanced aerospace and
defense applications. The NewMarket family of companies has a long-term commitment to its people, to safety, to providing innovative solutions for its customers, and to making the world a better place.
Some of the information contained in this press release constitutes forward-looking statements within the meaning of the Private Securities Litigation Reform
Act of 1995. Although NewMarket’s management believes its expectations are based on reasonable assumptions within the bounds of its knowledge of its business and operations, there can be no assurance that actual results will not differ
materially from expectations.
Factors that could cause actual results to differ materially from expectations include, but are not limited to, the
availability of raw materials and distribution systems; disruptions at production facilities, including single-sourced facilities; hazards common to chemical businesses; the ability to respond effectively to technological changes in our industries;
failure to protect our intellectual property rights; sudden, sharp, or prolonged raw material price increases; competition from other manufacturers; current and future governmental regulations; the loss of significant customers; termination or
changes to contracts with contractors and subcontractors of the U.S. government or directly with the U.S. government; failure to attract and retain a highly-qualified workforce; an information technology system failure or security breach; the
occurrence or threat of extraordinary events, including natural disasters, terrorist attacks, wars and health-related epidemics; risks related to operating outside of the United States, including tariffs and trade policy; political, economic, and
regulatory factors concerning our products; the impact of substantial indebtedness on our operational and financial flexibility; the impact of fluctuations in foreign exchange rates; resolution of environmental liabilities or legal proceedings;
limitation of our insurance coverage; our inability to realize expected benefits from investment in our infrastructure or from acquisitions, or our inability to successfully integrate acquisitions into our business; the underperformance of our
pension assets resulting in additional cash contributions to our pension plans; and other factors detailed from time to time in the reports that NewMarket files with the Securities and Exchange Commission, including the risk factors in Part I, Item
1A. “Risk Factors” of our Annual Report on Form 10-K for the year ended December 31, 2025, which is available to shareholders upon request.
