Merck & Co. (MRK) is trading up at $129.56 (+3.34%) on NYSE/NASDAQ, as of the latest quote. It is a S&P 500 constituent in the Health Care sector.
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.