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Rahway, New Jersey-based Merck & Co., Inc. (MRK) functions as a healthcare company. Valued at $265.3 billion by market cap, the company delivers health solutions through its prescription medicines, vaccines, biologic therapies, animal health, and consumer care products, which it markets directly and through its joint ventures.
Shares of this pharmaceutical giant have underperformed the broader market over the past year. MRK has gained 10.2% over this time frame, while the broader S&P 500 Index ($SPX) has rallied nearly 15.4%. However, in 2026, MRK stock is up 2.9%, surpassing the SPX’s 1.8% rise on a YTD basis.