# The 33 largest pharmaceutical companies in Ireland

Tamtam tracks 33 pharmaceutical companies headquartered in Ireland. This list ranks all of them by number of employees on LinkedIn, led by ICON plc, Kerry and Allergan. Their median headcount is 648. Half of them were founded in 1997 or later. The most common headquarters are Dublin (19).

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.

🇮🇪 Ireland · 33 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [ICON plc](https://www.tamtam.ai/c/icon-plc) (iconplc.com)<br>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 | Biotechnology Research | 🇮🇪 Dublin | 35,001 |  |
| 2 | [Kerry](https://www.tamtam.ai/c/kerry) (kerry.com)<br>Provides taste and nutrition solutions to food, beverage, and pharma brands, supporting product innovation and consumer satisfaction worldwide. | Food and Beverage Services | 🇮🇪 Naas | 16,755 |  |
| 3 | [Allergan](https://www.tamtam.ai/c/allergan) (abbvie.com)<br>The company discovers and delivers innovative medicines in various therapeutic areas including immunology, oncology, neuroscience, eye care, and more | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 9,833 |  |
| 4 | [ICON Strategic Solutions](https://www.tamtam.ai/c/icon-strategic-solutions) (iconplc.com)<br>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 | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 7,496 |  |
| 5 | [Perrigo Company plc](https://www.tamtam.ai/c/perrigo-company-plc) (perrigo.com)<br>European Consumer Self-Care market top player, U.S. store brand over-the-counter and infant formula provider, offering trusted health and wellness solutions. | Manufacturing | 🇮🇪 Dublin | 5,088 |  |
| 6 | [Jazz Pharmaceuticals](https://www.tamtam.ai/c/jazz-pharmaceuticals) (jazzpharma.com)<br>Global biopharmaceutical company focused on developing innovative medicines for serious diseases with limited treatment options to improve patient lives. | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 3,643 | 2003 |
| 7 | [Mallinckrodt Pharmaceuticals](https://www.tamtam.ai/c/mallinckrodt-pharmaceuticals) (mnk.com)<br>Specializing in specialty pharmaceuticals, we develop, manufacture, and distribute innovative treatments for underserved patient populations across various medical fields | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 3,400 | 1867 |
| 8 | [Horizon](https://www.tamtam.ai/c/horizon-dublin) (amgen.com)<br>Merged into Amgen and currently maintains an inactive social media presence without monitoring or active updates following the completed corporate acquisition. | Biotechnology Research | 🇮🇪 Dublin | 2,720 | 2008 |
| 9 | [Alkermes](https://www.tamtam.ai/c/alkermes) (alkermes.com)<br>A neuroscience-focused company developing innovative medicines for psychiatric and neurological disorders, with a strong focus on patient well-being and community support | Biotechnology Research | 🇮🇪 Dublin | 2,397 | 1987 |
| 10 | [MSD Ireland](https://www.tamtam.ai/c/msd-ireland) (msd-ireland.com)<br>A leading biopharmaceutical company dedicated to inventing life-saving medicines and vaccines for challenging diseases, with a focus on research and improving health worldwide | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 1,697 |  |
| 11 | [Uniphar Group](https://www.tamtam.ai/c/uniphar-group) (uniphar.ie)<br>Diversified healthcare services company operating in Ireland, UK, Europe, USA, and APAC, providing a wide range of healthcare-related activities | Pharmaceutical Manufacturing | 🇮🇪 Citywest Business Park | 825 |  |
| 12 | [Elan Pharmaceuticals](https://www.tamtam.ai/c/elan-pharmaceuticals) (perrigo.com)<br>Research, development, and commercialization of treatments for neurodegenerative and autoimmune diseases including Alzheimer’s, Parkinson’s, and multiple sclerosis. | Biotechnology Research | 🇮🇪 Dublin | 793 | 1969 |
| 13 | [Creganna Medical](https://www.tamtam.ai/c/creganna-medical) (te.com)<br>A global leader in designing and manufacturing access & delivery devices for minimally invasive medical therapies with a reputation for industry innovation and quality | Medical Equipment Manufacturing | 🇮🇪 Galway | 790 | 1980 |
| 14 | [DOCS](https://www.tamtam.ai/c/docs) (iconplc.com)<br>It is a global leader in Functional Service Provision, offering expertise and models that enhance business performance and reduce costs. | Pharmaceutical Manufacturing | 🇮🇪 Leopardstown | 734 |  |
| 15 | [Aerogen](https://www.tamtam.ai/c/aerogen) (aerogen.com)<br>Aerogen innovates aerosol drug delivery to improve respiratory care, patient outcomes, and healthcare provider efficiency, focusing on safety and effectiveness | Medical Equipment Manufacturing | 🇮🇪 Lower Dangan | 698 | 1997 |
| 16 | [Bimeda](https://www.tamtam.ai/c/bimeda) (bimeda.com)<br>An international veterinary pharmaceutical company with manufacturing facilities in multiple countries, offering high-quality products worldwide and focused on customer satisfaction | Veterinary | 🇮🇪 Tallaght | 661 | 1960 |
| 17 | [APC](https://www.tamtam.ai/c/apc-dublin) (approcess.com)<br>This company helps biopharma companies accelerate drug development with breakthrough science, lightning-fast process development, and radical collaboration to deliver for patients faster | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 648 | 2011 |
| 18 | [Vital Healthcare](https://www.tamtam.ai/c/vital-healthcare) (dccvital.com)<br>A healthcare company specializing in sales, marketing, and distribution of pharmaceuticals, medical, surgical, and lab products with a focus on improving patient care | Hospitals and Health Care | 🇮🇪 Dublin | 571 | 1829 |
| 19 | [Chanelle Pharma](https://www.tamtam.ai/c/chanelle-pharma) (chanellepharma.com)<br>Ireland’s largest manufacturer of generic pharmaceuticals for human and animal health, with a global presence and ambitious plans for growth | Pharmaceutical Manufacturing | 🇮🇪 Loughrea | 559 | 1985 |
| 20 | [Vitalograph](https://www.tamtam.ai/c/vitalograph) (vitalograph.com)<br>Global leader manufacturing and supplying high-quality spirometers and medical devices, aiding detection, diagnosis, and management of respiratory conditions for healthcare professionals worldwide. | Medical Equipment Manufacturing | 🇮🇪 Ennis | 396 | 1963 |
| 21 | [Trinity Biotech](https://www.tamtam.ai/c/trinity-biotech) (trinitybiotech.com)<br>Specializing in diagnostic test kits and equipment, we prioritize quality and efficacy to provide reliable diagnosis, aiming for an inclusive workplace with varied roles | Medical Equipment Manufacturing | 🇮🇪 Bray | 381 | 1992 |
| 22 | [Felix Pharmaceuticals Pvt. Ltd.](https://www.tamtam.ai/c/felix-pharmaceuticals-pvt-ltd) (felixvet.com)<br>A company specializing in pharmaceutical generics for veterinary medicine, with an HPRA approved facility in India and corporate offices in Ireland and India | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 312 | 2014 |
| 23 | [GC Aesthetics](https://www.tamtam.ai/c/gc-aesthetics) (gcaesthetics.com)<br>Leading manufacturer of breast implants with over 30 years experience, focusing on safety, innovation, quality, and customer support. | Medical Equipment Manufacturing | 🇮🇪 Sandyford | 296 |  |
| 24 | [Trulife](https://www.tamtam.ai/c/trulife) (trulife.com)<br>An internationally-managed group creating and marketing niche medical devices in areas such as Pressurecare, Orthopaedics, Prosthetics, Breastcare, Seating Solutions, and Walking Aids | Medical Equipment Manufacturing | 🇮🇪 Dublin | 289 | 1958 |
| 25 | [Eurofins Biopharma Product Testing Ireland](https://www.tamtam.ai/c/eurofins-biopharma-product-testing-ireland) (eurofins.ie)<br>Global network providing comprehensive GMP product testing services for pharmaceutical, biopharmaceutical, and medical device companies ensuring health and safety. | Pharmaceutical Manufacturing | 🇮🇪 Dungarvan | 249 |  |
| 26 | [Deciphex](https://www.tamtam.ai/c/deciphex) (deciphex.com)<br>Developing software for preclinical pathology to improve productivity, help pathologists focus on critical content, and address industry challenges | Software Development | 🇮🇪 DCU Alpha Building | 186 | 2017 |
| 27 | [Novartis Ireland](https://www.tamtam.ai/c/novartis-ireland) (novartis.com)<br>Innovative medicines company in Ireland focused on improving lives through breakthrough treatments for serious diseases and utilizing data and digital technologies | Pharmaceutical Manufacturing | 🇮🇪 Dublin | 162 |  |
| 28 | [Veeda Lifesciences](https://www.tamtam.ai/c/veeda-lifesciences-dublin) (heads-research.com)<br>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 | Research Services | 🇮🇪 Dublin | 124 | 2010 |
| 29 | [Servier Ireland](https://www.tamtam.ai/c/servier-ireland) (servier.ie)<br>A global pharmaceutical group dedicated to therapeutic innovation in cardiology, oncology, and other diseases, with a commitment to patient access and safety | Pharmaceutical Manufacturing | 🇮🇪 Arklow | 123 |  |
| 30 | [ResMed Sensor Technologies](https://www.tamtam.ai/c/resmed-sensor-technologies) (resmed.com)<br>Global leader in developing, manufacturing, and marketing medical products for respiratory disorders, specifically focusing on sleep-disordered breathing, to improve lives and raise awareness | Medical Equipment Manufacturing | 🇮🇪 Dublin | 121 |  |
| 31 | [Prothena Corporation](https://www.tamtam.ai/c/prothena-corporation) (prothena.com)<br>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 | Biotechnology Research | 🇮🇪 Dublin | 86 | 2012 |
| 32 | [INNOVO](https://www.tamtam.ai/c/innovo) (myinnovo.com)<br>Development of medical devices and software to treat incontinence and sexual dysfunction by strengthening pelvic floor muscles and modulating nerves. | Wellness and Fitness Services | 🇮🇪 Oranmore | 54 | 2017 |
| 33 | [Aegerion Pharmaceuticals](https://www.tamtam.ai/c/aegerion-pharmaceuticals) (amrytpharma.com)<br>A biopharmaceutical company focused on developing innovative treatments for rare and orphan diseases, with a growing commercial business and significant development pipeline | Biotechnology Research | 🇮🇪 Dublin | 29 | 2015 |

## 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](https://www.tamtam.ai/l/largest-companies-ireland) (1,769)
- [Multinational companies in Ireland](https://www.tamtam.ai/l/multinational-companies-ireland) (564)
- [SaaS companies in Ireland](https://www.tamtam.ai/l/saas-companies-ireland) (203)
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- [Financial Services companies in Ireland](https://www.tamtam.ai/l/financial-services-companies-ireland) (143)
- [Professional services firms in Ireland](https://www.tamtam.ai/l/professional-services-firms-ireland) (126)
- [Manufacturers in Ireland](https://www.tamtam.ai/l/manufacturers-ireland) (125)
- [Companies with in-house R&D in Ireland](https://www.tamtam.ai/l/r-and-d-companies-ireland) (120)
- [Critical infrastructure operators in Ireland](https://www.tamtam.ai/l/critical-infrastructure-operators-ireland) (118)
- [Companies with a mobile app in Ireland](https://www.tamtam.ai/l/companies-with-mobile-app-ireland) (99)
- [Public sector organisations in Ireland](https://www.tamtam.ai/l/public-sector-organisations-ireland) (88)
- [Retail companies in Ireland](https://www.tamtam.ai/l/retail-companies-ireland) (84)
- [Education providers in Ireland](https://www.tamtam.ai/l/education-companies-ireland) (83)
- [IT Services and IT Consulting companies in Ireland](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-ireland) (83)
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- [Construction companies in Ireland](https://www.tamtam.ai/l/construction-companies-ireland) (70)
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- [Consulting firms in Ireland](https://www.tamtam.ai/l/consulting-firms-ireland) (65)
- [Family-owned companies in Ireland](https://www.tamtam.ai/l/family-owned-companies-ireland) (64)
- [Distributors and wholesalers in Ireland](https://www.tamtam.ai/l/distributors-and-wholesalers-ireland) (63)
- [Subscription businesses in Ireland](https://www.tamtam.ai/l/subscription-businesses-ireland) (62)
- [Hardware manufacturers in Ireland](https://www.tamtam.ai/l/hardware-companies-ireland) (61)

## The same list elsewhere

- [Pharmaceutical companies in the world](https://www.tamtam.ai/l/pharmaceutical-companies-in-the-world) (5,664)
- [Pharmaceutical companies in Europe](https://www.tamtam.ai/l/pharmaceutical-companies-in-europe) (3,019)

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Source: https://www.tamtam.ai/l/pharmaceutical-companies-ireland