Merck & Co.MRK
NYSE · USA · Segment 2 of 8 in the Medicine, pharma & life science value chain: Big pharma
Keytruda is the centre of the oncology business, which sits next to a substantial vaccines portfolio. Animal health forms a third division.
Big pharma: Large, diversified pharmaceutical groups with broad portfolios across therapeutic areas.
Key metrics
Market cap
$330B
Price
$150.66
Today
−1.2%
Return YTD
+44.9%
Return 1Y
+77.2%
P/E
103.9
P/S
5.0
P/B
7.2
Data as of 2026-08-25 · updates daily after U.S. close
Theme exposure
In the value chain
Products & services
- Oncology (Keytruda)
- Vaccines
- Animal health
Competitors
- Bristol Myers Squibb
- Pfizer
- AstraZeneca
Risks
- Dependence on Keytruda
- Patent cliff (2028)
Supply chain
Supplies →
← Suppliers
Same segment: Big pharma
Compare MRK
See where Merck & Co. sits in the full Medicine, pharma & life science map: every segment from upstream suppliers to end markets, with daily metrics.Open the Life science value chain →