MRK

Merck & Co., Inc. is a global biopharmaceutical company that discovers, develops, manufactures and markets prescription medicines, vaccines, biologic therapies and animal‑health products, primarily selling through wholesalers, hospitals, pharmacies and veterinary channels. It operates in the healthcare sector, with major business segments focused on human pharmaceuticals, vaccines and animal health. The firm is among the world’s largest drugmakers, ranking within the top five by revenue and known for leading oncology treatments such as Keytruda and a broad portfolio of vaccines including Gardasil. Its business model combines extensive R&D investment with worldwide commercialization networks and a strong presence in both human and veterinary markets.