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Market data provided for informational purposes only. Not financial advice. Read disclaimers.

About Merck & Co. Inc.

Merck is a global pharmaceutical company known for Keytruda, the world's best-selling drug and the leading cancer immunotherapy (anti-PD-1). Keytruda generates over $25B in annual revenue and is approved across 30+ cancer types. Merck also operates an Animal Health division (the largest veterinary pharma business globally) and has a growing vaccine portfolio including Gardasil (HPV).

SectorHealthcare
IndustryPharmaceuticals
CEORob Davis
HeadquartersRahway, NJ
Founded1891
Employees~69,000
Market Cap TierMega Cap

Key Products & Services

Keytruda (oncology)Gardasil (HPV vaccine)Lagevrio (COVID)Animal Health
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Why Watch MRK in 2026

The Keytruda patent cliff (expected late 2028) is the dominant investment question. Merck's pipeline must replace $25B+ in Keytruda revenue — acquisitions, line extensions (subcutaneous Keytruda), and new oncology/immunology drugs are the critical watch items.

Key Competitors

Bristol-Myers SquibbRocheAstraZenecaPfizer