Merck is a global health care company delivering innovative health solutions through prescription medicines, biologic therapies, vaccines, and animal health products, with total sales of $65.0 billion in 2025. Its Pharmaceutical segment is anchored by the oncology blockbuster Keytruda ($31.7 billion in 2025 sales, now including the subcutaneous Keytruda Qlex), the Gardasil HPV vaccines, the fast-growing pulmonary arterial hypertension medicine Winrevair, pneumococcal vaccine Capvaxive, and hospital and cardiometabolic products, sold primarily to wholesalers, retailers, hospitals, government agencies, and managed care providers. The Animal Health segment provides veterinary pharmaceuticals, vaccines, and connected identification and monitoring products for livestock and companion animals. Headquartered in Rahway, New Jersey, Merck invests heavily in its pipeline to broaden the portfolio ahead of Keytruda's patent expiries.

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Merck & Co Inc