These pharmaceutical companies in Ireland are primarily large groups, with several global players in drug development, manufacturing, and biotechnology research. ICON plc specializes in accelerating drug and device development, while Allergan discovers and delivers innovative medicines across therapeutic areas. Kerry provides taste and nutrition solutions to various brands, and Perrigo Company plc is a top player in the European consumer self-care market. Jazz Pharmaceuticals focuses on developing medicines for serious diseases.
The companies listed are largely headquartered in Dublin, indicating a concentration of the pharmaceutical sector in the capital. While some firms like Mallinckrodt Pharmaceuticals have long histories, founded in 1867, others like Jazz Pharmaceuticals, founded in 2003, represent more recent establishments in the sector. This blend of established and newer companies reflects a diverse industry landscape.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
ICON plciconplc.com
A global company founded in Ireland in 1990, specializing in accelerating the development of drugs and devices to save lives and improve quality of life |
35,001 | |||
| 2 | 16,755 | ||||
| 3 |
Allerganabbvie.com
The company discovers and delivers innovative medicines in various therapeutic areas including immunology, oncology, neuroscience, eye care, and more |
9,833 | |||
| 4 |
ICON Strategic Solutionsiconplc.com
Global leader in Functional Service Provision services, offering cost-saving FSP models and clinical expertise to improve business performance Providing industry insights and job opportunities |
7,496 | |||
| 5 |
Perrigo Company plcperrigo.com
European Consumer Self-Care market top player, U.S. store brand over-the-counter and infant formula provider, offering trusted health and wellness solutions. |
5,088 | |||
| 6 |
Jazz Pharmaceuticalsjazzpharma.com
Global biopharmaceutical company focused on developing innovative medicines for serious diseases with limited treatment options to improve patient lives. |
3,643 | |||
| 7 |
Mallinckrodt Pharmaceuticalsmnk.com
Specializing in specialty pharmaceuticals, we develop, manufacture, and distribute innovative treatments for underserved patient populations across various medical fields |
3,400 | |||
| 8 | 2,720 | ||||
| 9 |
Alkermesalkermes.com
A neuroscience-focused company developing innovative medicines for psychiatric and neurological disorders, with a strong focus on patient well-being and community support |
2,397 | |||
| 10 |
MSD Irelandmsd-ireland.com
A leading biopharmaceutical company dedicated to inventing life-saving medicines and vaccines for challenging diseases, with a focus on research and improving health worldwide |
1,697 | |||
| 11 |
Uniphar Groupuniphar.ie
Diversified healthcare services company operating in Ireland, UK, Europe, USA, and APAC, providing a wide range of healthcare-related activities |
825 | |||
| 12 |
Elan Pharmaceuticalsperrigo.com
Research, development, and commercialization of treatments for neurodegenerative and autoimmune diseases including Alzheimer鈥檚, Parkinson鈥檚, and multiple sclerosis. |
793 | |||
| 13 |
Creganna Medicalte.com
A global leader in designing and manufacturing access & delivery devices for minimally invasive medical therapies with a reputation for industry innovation and quality |
790 | |||
| 14 |
DOCSiconplc.com
It is a global leader in Functional Service Provision, offering expertise and models that enhance business performance and reduce costs. |
734 | |||
| 15 |
Aerogenaerogen.com
Aerogen innovates aerosol drug delivery to improve respiratory care, patient outcomes, and healthcare provider efficiency, focusing on safety and effectiveness |
698 | |||
| 16 |
Bimedabimeda.com
An international veterinary pharmaceutical company with manufacturing facilities in multiple countries, offering high-quality products worldwide and focused on customer satisfaction |
661 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 17 |
APCapprocess.com
This company helps biopharma companies accelerate drug development with breakthrough science, lightning-fast process development, and radical collaboration to deliver for patients faster |
648 | |||
| 18 |
Vital Healthcaredccvital.com
A healthcare company specializing in sales, marketing, and distribution of pharmaceuticals, medical, surgical, and lab products with a focus on improving patient care |
571 | |||
| 19 |
Chanelle Pharmachanellepharma.com
Ireland鈥檚 largest manufacturer of generic pharmaceuticals for human and animal health, with a global presence and ambitious plans for growth |
559 | |||
| 20 |
Vitalographvitalograph.com
Global leader manufacturing and supplying high-quality spirometers and medical devices, aiding detection, diagnosis, and management of respiratory conditions for healthcare professionals worldwide. |
396 | |||
| 21 |
Trinity Biotechtrinitybiotech.com
Specializing in diagnostic test kits and equipment, we prioritize quality and efficacy to provide reliable diagnosis, aiming for an inclusive workplace with varied roles |
381 | |||
| 22 |
Felix Pharmaceuticals Pvt. Ltd.felixvet.com
A company specializing in pharmaceutical generics for veterinary medicine, with an HPRA approved facility in India and corporate offices in Ireland and India |
312 | |||
| 23 |
GC Aestheticsgcaesthetics.com
Leading manufacturer of breast implants with over 30 years experience, focusing on safety, innovation, quality, and customer support. |
296 | |||
| 24 |
Trulifetrulife.com
An internationally-managed group creating and marketing niche medical devices in areas such as Pressurecare, Orthopaedics, Prosthetics, Breastcare, Seating Solutions, and Walking Aids |
289 | |||
| 25 |
Eurofins Biopharma Product Testing Irelandeurofins.ie
Global network providing comprehensive GMP product testing services for pharmaceutical, biopharmaceutical, and medical device companies ensuring health and safety. |
249 | |||
| 26 |
Deciphexdeciphex.com
Developing software for preclinical pathology to improve productivity, help pathologists focus on critical content, and address industry challenges |
186 | |||
| 27 |
Novartis Irelandnovartis.com
Innovative medicines company in Ireland focused on improving lives through breakthrough treatments for serious diseases and utilizing data and digital technologies |
162 | |||
| 28 |
Veeda Lifesciencesheads-research.com
A full service CRO specializing in global hemato-oncology research with innovative late phase designs and technology-driven monitoring to enhance data quality and reduce costs |
124 | |||
| 29 |
Servier Irelandservier.ie
A global pharmaceutical group dedicated to therapeutic innovation in cardiology, oncology, and other diseases, with a commitment to patient access and safety |
123 | |||
| 30 |
ResMed Sensor Technologiesresmed.com
Global leader in developing, manufacturing, and marketing medical products for respiratory disorders, specifically focusing on sleep-disordered breathing, to improve lives and raise awareness |
121 | |||
| 31 |
Prothena Corporationprothena.com
A late-stage clinical biotechnology company specializing in novel therapies for neurodegenerative and rare peripheral amyloid diseases, driven by a commitment to improving human health |
86 | |||
| 32 |
INNOVOmyinnovo.com
Development of medical devices and software to treat incontinence and sexual dysfunction by strengthening pelvic floor muscles and modulating nerves. |
54 | |||
| 33 |
Aegerion Pharmaceuticalsamrytpharma.com
A biopharmaceutical company focused on developing innovative treatments for rare and orphan diseases, with a growing commercial business and significant development pipeline |
29 | |||
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How this list is built
Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 12, 2026.
More company lists in Ireland
- The largest companies in Ireland 1,769
- Multinational companies in Ireland 564
- SaaS companies in Ireland 203
- Software Development companies in Ireland 176
- Retail chains in Ireland 166
- Financial services firms in Ireland 143
- Financial Services companies in Ireland 143
- Professional services firms in Ireland 126
- Manufacturers in Ireland 125
- Companies with in-house R&D in Ireland 120
- Critical infrastructure operators in Ireland 118
- Companies with a mobile app in Ireland 99
- Public sector organisations in Ireland 88
- Retail companies in Ireland 84
- Education providers in Ireland 83
- IT Services and IT Consulting companies in Ireland 83
- IT services companies in Ireland 77
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- Healthcare providers in Ireland 69
- Consulting firms in Ireland 65
- Family-owned companies in Ireland 64
- Distributors and wholesalers in Ireland 63
- Subscription businesses in Ireland 62
- Hardware manufacturers in Ireland 61