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Amgen Inc. is an American multinational biopharmaceutical company headquartered in Thousand Oaks, California, that develops, manufactures, and sells human therapeutics. As of 2021, Amgen is the world's largest biotechnology company by revenue and the world's fifth-largest pharmaceutical company by sales. The company's products are used to treat a wide range of diseases, including cancer, blood disorders, kidney disease, and bone disorders.