
The pharmaceutical manufacturing industry in the United States is a vital component of the nation's healthcare system and economy. This sector plays a crucial role in developing, producing, and distributing medications that improve and save lives. With a strong emphasis on innovation and quality, U.S. pharmaceutical manufacturers are at the forefront of medical advancements, ensuring that patients have access to cutting-edge treatments.
In this article, we will explore some of the leading pharmaceutical manufacturers in the United States, explore some of the latest trends and statistics on this powerful industry, based on data collected by MNI.
As part of MNI's ongoing initiative to update its comprehensive industrial business profiles for sales, marketing, and business development, including the Medical, Biotech & Pharmaceutical Company Database, they've contacted each and every company directly, gleaning insights into this powerful sector. Here's what to know:
| Top Companies | City | State | Number of Employees |
|---|---|---|---|
| Merck & Co., Inc. | West Point | PA | 9,500 |
| Merck & Co., Inc. | Rahway | NJ | 6,000 |
| OPKO Health, Inc. | Miami | FL | 5,269 |
| Roche Holdings, Inc. | South San Francisco | CA | 5,000 |
| Amway Corp. | Ada | MI | 4,000 |
| AstraZeneca Pharmaceuticals LP | Gaithersburg | MD | 3,500 |
| Endo Pharmaceuticals, Inc. | Malvern | PA | 3,500 |
| Perrigo Co. | Allegan | MI | 3,500 |
| AbbVie, Inc. | North Chicago | IL | 3,400 |
| Gilead Sciences, Inc. | Foster City | CA | 3,400 |

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Merck & Co., Inc. – West Point, PA (9,500 employees) Merck’s West Point campus is one of the company’s largest and most advanced manufacturing and R&D hubs. The site plays a critical role in vaccine production, sterile injectables, and biologics manufacturing. Established in the 1890s, the facility also houses clinical trial support and packaging operations, making it a linchpin in Merck’s global supply chain.
Merck & Co., Inc. – Rahway, NJ (6,000 employees) Rahway is home to Merck’s original manufacturing site and now serves as a major research and development headquarters. With operations dating back over a century, the campus supports drug discovery, pilot manufacturing, and executive leadership. The site has been central to breakthrough therapies across oncology, cardiology, and infectious disease.
OPKO Health, Inc. – Miami, FL (5,269 employees) OPKO Health is a diversified healthcare company specializing in diagnostics and pharmaceuticals, with a flagship facility in Miami. The company develops diagnostic reagents for prostate cancer and endocrine disorders, and markets the 4Kscore® test for cancer risk prediction. OPKO also has a robust drug development pipeline and operations in Latin America and Europe.
Roche Holdings, Inc. – South San Francisco, CA (5,000 employees) Roche’s U.S. pharmaceutical division is headquartered in South San Francisco, where it focuses on protein-based biologics and targeted cancer therapies. The site integrates R&D, manufacturing, and corporate operations and is closely aligned with Genentech, a Roche subsidiary that pioneered biotechnology-based drug development.
Amway Corp. – Ada, MI (4,000 employees) While better known for its consumer health and wellness products, Amway also operates one of the largest vitamin and supplement manufacturing facilities in the country at its Ada, Michigan headquarters. Its Nutrilite® brand is a global leader in phytonutrient-based supplements, and the site handles everything from seed-to-supplement processing to packaging and global distribution.
Johnson & Johnson – Raritan, NJ (9,200 employees) Johnson & Johnson’s Raritan facility serves as a major hub for its Innovative Medicine business, spanning everything from cell and gene therapy to CAR T and biologics manufacturing. With roots dating back to the early 20th century, this site anchors J&J’s vaccine, therapeutic biologics, and emerging medicine capabilities.
Pfizer – Kalamazoo, MI (6,500 employees) Pfizer’s Kalamazoo campus is the company’s single largest U.S. manufacturing facility, covering 1,300 acres and producing APIs, sterile injectables, and at least one medical device annually. With an annual output exceeding 140 million finished units, the site supplies essential medicines and equipment to more than 113 countries, supporting Pfizer’s global reach.
Pfizer – Collegeville, PA (5,300 employees) Pfizer’s iconic Collegeville campus blends R&D, drug process development, and clinical production. It is central to the company’s pipeline in oncology and advanced biologics and remains a hub for strategic manufacturing operations within Pfizer’s global network.
Boehringer Ingelheim – Ridgefield, CT (2,600 employees) The Ridgefield facility is Boehringer Ingelheim’s U.S. headquarters and a core manufacturing and patient advocacy campus.
AbbVie, Inc. – North Chicago, IL (4,000 employees) AbbVie’s North Chicago campus houses its global headquarters and advanced manufacturing operations focused on immunology, oncology, neuroscience, eye care, and aesthetics medications
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Article Sources:
Senior Scientist - Vaccines and Advanced Biotechnologies Process R&D
Demolition is on hold at Novartis HQ in East Hanover - Daily Record
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Gensler reveals rendering of Pfizer HQ conversion in New York - Dezeen