finance.foundation / Companies / UNH vs MRK
Comparison · seed-0.6 · 2026-08-29
UnitedHealth Group (UNH) vs Merck & Co. (MRK)
UnitedHealth Group (UNH) and Merck & Co. (MRK) side by side: both in Healthcare, both listed on New York Stock Exchange. UnitedHealth Group is the larger of the two by approximate market capitalization (about 1.4×).
| Field | UnitedHealth Group | Merck & Co. |
|---|---|---|
| Legal name | UnitedHealth Group Incorporated | Merck & Co., Inc. |
| Ticker | UNH | MRK |
| Exchange | New York Stock Exchange XNYS | New York Stock Exchange XNYS |
| Jurisdiction | United States | United States |
| Sector | Healthcare | Healthcare |
| Industry | Health Insurance | Pharmaceuticals |
| Market cap ≈ | $350bn | $250bn |
| Founded | 1977 | 1891 |
| Reporting currency | USD | USD |
| LEI | 549300GHBMY8T5GXDE41 | 4YV9Y5M8S0BRK1RP0397 |
| ISIN | US91324P1021 | US58933Y1055 |
| FIGI | BBG001S6WCJ1 | BBG001S5TC52 |
| Index membership | S&P 500 | S&P 500 |
| Held by (covered funds) | — | — |
UnitedHealth Group
Largest US health insurer plus Optum health-services and data platform.
Merck & Co.
US pharmaceutical major (known as MSD outside North America) whose cancer immunotherapy Keytruda is among the world's best-selling drugs; also strong in vaccines and animal health.
What they share
Same indices: S&P 500
Approximate reference values (seed-0.6 · 2026-08-29) — not real-time, not investment advice. Both sides as data: /api/v1/companies/unitedhealth · /api/v1/companies/merck