About

Merck & Co., Inc. is an American multinational pharmaceutical company headquartered in Rahway, New Jersey. Founded in January 1891 as a subsidiary of Merck and becoming an independent company in 1917, it operates as Merck Sharp & Dohme or MSD outside the United States and Canada. As a public company, Merck & Co. is a major player in the pharmaceutical industry, ranked fourth among the largest biomedical companies by revenue, which stood at US$ 64.17 billion in 2024.