Yes — Merck is headquartered in New Jersey, listed on the NYSE since 1949, and generates nearly half its sales from US human health.
The Short Answer Is Yes
When a company has been synonymous with American pharmaceutical research for as long as Merck & Co., Inc. has, it's easy to assume its nationality without checking the facts. But the facts back it up plainly: Merck is an American company, headquartered in Rahway, New Jersey, and listed on the New York Stock Exchange under the ticker MRK.
Headquartered in New Jersey
Merck's home base sits in Rahway, New Jersey, a state that has long been a hub for pharmaceutical manufacturing and research. That headquarters address is the anchor point for a company that now employs approximately 75,000 people worldwide.
A Listing Going Back Decades
Merck isn't a recent arrival to American capital markets. The company went public in April 1949, meaning it has traded on US exchanges for more than seven decades — a long institutional history tied to the American financial system.
What Merck Actually Makes
Merck is a pharmaceutical company, and its business spans several major therapeutic areas. It develops treatments for cardiometabolic disease, cancer, and infections, alongside a substantial vaccine business.
The Cancer and Vaccine Businesses
Within oncology, Merck's immuno-oncology platform — led by Keytruda — is a major contributor to overall company sales. On the vaccine side, Merck produces shots aimed at preventing pediatric diseases, along with Gardasil, its vaccine for human papillomavirus. The company also sells animal health-related drugs, rounding out a diversified portfolio.
Sizing Up the Business
Merck's financial scale reflects its position as one of the larger companies in American pharmaceuticals. In fiscal year 2025, the company reported revenue of $65.0 billion and net income of $18.3 billion. Total assets stand at $136.9 billion, and the company's market capitalization is $323.7 billion.
Where the Sales Come From
Geography matters when answering the American-company question, and here the data is telling: 47% of Merck's sales are generated from US human health, covering both pharmaceuticals and vaccines. That means nearly half of the company's business runs through the American health care system, even as it also sells products abroad.
Publicly Traded and Publicly Verifiable
Because Merck is publicly traded on the NYSE, its corporate structure, headquarters location, and financial filings are a matter of public record rather than internal claim. That transparency is part of what makes the American-company question answerable with confidence rather than guesswork.
Listed in the National Directory
Merck's inclusion in the americancompanies.com directory of US-based companies further reflects its standing as a domestic firm rather than a foreign entity with a US sales office. Between its New Jersey headquarters, its 1949 IPO on a US exchange, and the near-half share of sales tied to US human health, the evidence points in one direction. Merck & Co., Inc. is, by every measure available here, an American company.
