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Merck & Co.

Also known as MSD, Merck Sharp & Dohme, Merck Sharp & Dohme Corp.

American multinational pharmaceutical company

Key facts

Company type: Public
Traded as: NYSE : MRK DJIA component S&P 100 component S&P 500 component
Industry: Pharmaceuticals
Founded: January 1891 ; 135 years ago ( 1891-01 ) , as a subsidiary of Merck 1917 ; 109 years ago ( 1917 ) , as an independent company
Founders: Theodore Weicker George Merck
Headquarters: Rahway, New Jersey , U.S.
Area served: Worldwide
Key people: Robert M. Davis ( chairman , president and CEO ) Caroline Litchfield ( CFO ) Dean Y. Li (president, Merck Research Laboratories)
Products: Pharmaceuticals generic drugs over-the-counter drugs vaccines diagnostics Veterinary medicine
Revenue: US$ 65.01 billion (2025)
Operating income: US$21.22 billion (2025)

Article

Merck & Co., Inc. is an American multinational pharmaceutical company headquartered in Rahway, New Jersey. The company does business as Merck Sharp & Dohme or MSD outside the United States and Canada. The company is ranked fifth on the list of largest biomedical companies by revenue.

The company's revenues are primarily from cancer treatments, vaccines, and animal health products. In 2024, 46% of the company's revenue, or $29.5 billion, came from sales of Keytruda (pembrolizumab), a PD-1 inhibitor used to treat various types of cancers, and 13% of the company's revenue, or $8.6 billion, came from sales of Gardasil, an HPV vaccine. In addition, 9% of the company's revenue, or $5.8 billion, came from the sales of animal health products.