Merck & Co., Inc.
Merck & Co., Inc. is an American multinational pharmaceutical company headquartered in Rahway, New Jersey. The company does business as Merck Sharp & Dohme or MSD outside the United States and Canada. The company is ranked fifth on the list of largest biomedical companies by revenue.
Basic company information
Each field links to its source. Financial figures retain their reporting periods; background references are identified in the source list.
- Ticker / security symbols
- MRK [1]
- Listing exchanges
- NYSE [1]
- SEC industry
- Pharmaceutical Preparations [1]
- Business sectors
- pharmaceutical industry [2]
- Company / filing name
- Merck & Co., Inc. [1]
- Headquarters location
- Kenilworth; Rahway; Philadelphia [2]
- Business address
- 126 EAST LINCOLN AVENUE, P.O. BOX 2000, RAHWAY, NJ, 07065 [1]
- Founded
- 1891 [2]
- Incorporation jurisdiction
- New Jersey, United States [1]
- Leadership in background record
- Rob Davis [2]
- Founders
- George Merck [2]
- Official website
- https://www.merck.com; https://www.msd.no/ [2]
- Employees
- 70,000 · reported year 2015 [2]
- Annual revenue
- USD 65,011,000,000 · 2025-01-01 to 2025-12-31 [3]
- Total assets
- USD 136,866,000,000 · at 2025-12-31 [3]
- Net income / loss
- USD 18,254,000,000 · 2025-01-01 to 2025-12-31 [3]
- Fiscal year end
- December 31 (SEC record) [1]
- ISIN (reported securities)
- US58933Y1055 [2]
- CIK
- 0000310158 [1]
- SIC code
- 2834 [1]
- Country in background record
- United States [2]
Company positioning and business
Merck & Co., Inc. is an American multinational pharmaceutical company headquartered in Rahway, New Jersey. The company does business as Merck Sharp & Dohme or MSD outside the United States and Canada. The company is ranked fifth on the list of largest biomedical companies by revenue. [4]
The company's revenues are primarily from cancer treatments, vaccines, and animal health products. In 2024, 46% of the company's revenue, or $29.5 billion, came from sales of Keytruda (pembrolizumab), a PD-1 inhibitor used to treat various types of cancers, and 13% of the company's revenue, or $8.6 billion, came from sales of Gardasil, an HPV vaccine. In addition, 9% of the company's revenue, or $5.8 billion, came from the sales of animal health products. [4]
The company is ranked 65th on the Fortune 500 and 76th on the Forbes Global 2000. [4]
Background text: Wikipedia contributors, Merck & Co.. Selected introductory paragraphs, licensed under CC BY-SA 4.0. Official filing data is cited separately.
Management and corporate governance
The Wikidata background record identifies Rob Davis in the chief-executive role. This background entry is not an official confirmation of the current board or executive roster. [2]
Understanding company scale
Revenue: USD 65,011,000,000, 2025-01-01 to 2025-12-31. Reported in Form 10-K filed 2026-02-24. Figures are consolidated XBRL facts; reporting periods and amendments must be checked before comparing companies. [3]
Net income / loss: USD 18,254,000,000, 2025-01-01 to 2025-12-31. Reported in Form 10-K filed 2026-02-24. Figures are consolidated XBRL facts; reporting periods and amendments must be checked before comparing companies. [3]
Total assets: USD 136,866,000,000, at 2025-12-31. Reported in Form 10-K filed 2026-02-24. Figures are consolidated XBRL facts; reporting periods and amendments must be checked before comparing companies. [3]
Financial year, securities and disclosures
The SEC submissions record gives Merck & Co., Inc. a fiscal year end of 1231 (MMDD). Individual filings below identify their own reporting period; the filing date is the publication event, not the financial year end. [1]
Listed securities: MRK (NYSE). Multiple symbols may represent different share classes or securities of the same registrant. [5]
History and key events
Financial results and regulatory disclosures
Annual, quarterly and current reports from the collected SEC record. Insider Forms 4 and 144 are excluded. This is a selected list, not a live filing feed.
Source-verified relationships
Companies in the same industry
Comparison candidates share the SEC SIC classification 2834. This does not imply ownership, partnership or trading relationships.
Related entities and concepts
Frequently asked questions
When was Merck & Co., Inc. founded?
Founded: 1891. The linked source provides the background record. [2]
Where is the headquarters of Merck & Co., Inc.?
Headquarters location: Kenilworth; Rahway; Philadelphia. The linked source provides the background record. [2]
Which business sectors are recorded for Merck & Co., Inc.?
Business sectors: pharmaceutical industry. The linked source provides the background record. [2]
Merck & Co., Inc. relationship map
Select a node to inspect its relationship and source.
2 verified direct relationships. Industry peers are not relationship edges.
Sources and review dates
- SEC — Merck & Co., Inc. filing identity and securities ↗
- Wikidata — company background record (CC0) ↗
- SEC — Merck & Co., Inc. reported financial facts ↗
- Wikipedia contributors — Merck & Co. (CC BY-SA 4.0) ↗
- SEC securities directory ↗
- Company chronology / filing ↗
Reviewed 23 October 2026. Financial periods and historical event dates are shown separately. Figures reflect their stated source dates; this page is not a live quote or investment recommendation.