Merck & Co., Inc. (NYSE: MRK), dba Merck Sharp & Dohme, MSD outside the United States and Canada, is one of the largest pharmaceutical companies in the world. Merck headquarters is located in Whitehouse Station, New Jersey. The company was established in 1891 as the United States subsidiary of the German company now known as Merck KGaA. Merck & Co. was confiscated by the US government during World War I and subsequently established as an independent American company. It is currently one of the World's seven largest pharmaceutical companies by market capitalization and revenue.

The company describes itself as "a global research-driven pharmaceutical company" that "discovers, develops, manufactures and markets a broad range of innovative products to improve human and animal health, directly and through its joint ventures".

Merck also publishes The Merck Manuals, a series of medical reference books for physicians, nurses, and technicians. These include the Merck Manual of Diagnosis and Therapy, the world's best-selling medical textbook, and the Merck Index, a compendium of chemical compounds.

In 2011 the company received the "Facility of the Year"-Award for the integration of its global clinical supplies manufacturing, packing, and warehouse building in Summit, New Jersey, USA. (Source: Wikipedia)