Pharmaceutical giant Merck will close its plant in Northumberland County, Pennsylvania. According to a WARN Notice filed with the state's Department of Labor and Industry, three rounds of layoffs ...

See the latest Merck & Co Inc stock price (MRK:XNYS), related news, valuation, dividends and more to help you make your investing decisions.

Read about Merck & Co Inc (MRK:XNYS) stock and today's latest news and financial updates.

View the latest Merck KGaA (MRK) stock price, news, historical charts, analyst ratings and financial information from WSJ.

Find the latest Merck & Co., Inc. (MRK) stock quote, history, news and other vital information to help you with your stock trading and investing.