Merck & Co. (MRK)
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.
- Legal name
- Merck & Co., Inc.
- Ticker
- MRK
- Exchange
- New York Stock Exchange · MIC XNYS
- Country
- United States
- Sector
- Healthcare
- Industry
- Pharmaceuticals
- Market cap ≈
- $366bn — computed, not copied: 2.467bn shares × $148.35 close on 2026-08-28
- Reporting currency
- USD
- Founded
- 1891
- Website
- www.merck.com
- LEI
- 4YV9Y5M8S0BRK1RP0397 (GLEIF)
- ISIN
- US58933Y1055 (check digit validated)
- FIGI
- BBG001S5TC52 (share class, OpenFIGI)
Graph connections view in graph →
lists_onNew York Stock Exchange
domiciled_inUnited States
member_ofS&P 500
Sector peers — Healthcare
Compare: MRK vs LLY · MRK vs UNH · MRK vs JNJ
How this market cap is arrived at
| Shares outstanding | 2,467,171,638 |
| Basis | outstanding |
| As of | 2026-06-30 |
| Source | SEC 10-Q cover page (2026-06-30) |
| Price | 148.35 USD · MRK · close 2026-08-28 |
| Venue | NYSE |
| Market cap | $366bn |
US-domiciled, no ADR. Single class. Do not confuse this Merck (US, CIK 0000310158, NYSE: MRK) with the unrelated German Merck KGaA (MRK.DE / EMD in the US) — they share the 'Merck' name and the MRK ticker string in different markets, which is a classic mis-mapping. Count is shrinking on buyback: 2,497.8m (2025-07-31) -> 2,467.2m (2026-07-31), about -1.2% year on year. Merck holds a large treasury position, already excluded from the cover figure.
Share counts move on a filing cadence, prices move continuously — so this figure is exact only as of the two dates above, and we publish both rather than a single undated number. Provenance.
Fundamentals
| From the 10-K for the year ended 2025-12-31 | USD | As reported |
|---|---|---|
| Revenueus-gaap:Revenues | $65.0bn | |
| Net incomeus-gaap:NetIncomeLoss | $18.3bn | |
| Research & developmentus-gaap:ResearchAndDevelopmentExpense | $15.8bn | |
| Total assetsus-gaap:Assets | $136.9bn | |
| Shareholders' equityus-gaap:StockholdersEquity | $52.6bn | |
| Cash & equivalentsus-gaap:CashAndCashEquivalentsAtCarryingValue | $14.6bn |
Net margin 28.1% — net income divided by revenue, both from this same filing.
Market cap / net income 20.1× — a market value from 2026-08-28 divided by earnings for a year that ended 2025-12-31. The two dates are far apart on purpose: this is arithmetic on two published numbers, not a valuation.
Every figure above is read from the same 10-K, filed 2026-02-24, and each row names the XBRL tag it came from so it can be checked against the document. Metrics absent from that filing are absent here rather than sourced from a different year — a table mixing periods is individually true and collectively meaningless.
Identifier crosswalk
| Standard | Value | What it answers |
|---|---|---|
| Ticker | MRK | Venue-local shorthand — ambiguous across markets |
| MIC | XNYS | ISO 10383 — the venue |
| ISIN | US58933Y1055 | ISO 6166 — the security |
| LEI | 4YV9Y5M8S0BRK1RP0397 | ISO 17442 — the legal entity |
| FIGI | BBG001S5TC52 | OpenFIGI — instrument, share class |
| CUSIP | 58933Y105 | Derived from the US/CA ISIN, check digit verified — licensed identifier, not republished as data |
6 naming systems for one entity — only codes we actually hold are listed, with no gaps filled by guessing. Sources: LEI from GLEIF (CC0), ISIN read from the issuer's own primary listing document, with its ISO 6166 check digit validated, FIGI from OpenFIGI (open standard), MIC from the ISO 10383 registry. CUSIP appears because it is arithmetically embedded in US and Canadian ISINs — we derive and verify it from a code we already hold, and we do not redistribute CUSIP Global Services data. Each linked code opens its reverse-lookup page; the validator checks any code's check digit. seed-0.7 · marketcap-1 · 2026-08-30.
Approximate reference values from public sources · seed-0.7 · marketcap-1 · 2026-08-30 · not real-time. See data & methodology.
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