# The 30 largest companies with in-house R&D in Dublin

Tamtam tracks 43 companies with in-house R&D headquartered in Dublin. This list ranks the 30 largest by number of employees on LinkedIn, led by Eaton, Smurfit Westrock and Smurfit Kappa. Their median headcount is 1,697. Half of them were founded in 1993 or later.

The companies with in-house R&D in Dublin are mostly large firms, with a notable presence in manufacturing, particularly pharmaceuticals and packaging, and in healthcare. For example, Eaton specializes in intelligent power management, Smurfit Westrock provides paper-based packaging solutions, ICON plc accelerates drug and device development, and Allergan discovers and delivers innovative medicines in various therapeutic areas.

A significant pattern among these companies is their global reach, with many operating across multiple countries. Another observation is the strong representation of companies in the pharmaceutical and biotechnology sectors, such as Jazz Pharmaceuticals, which focuses on innovative medicines for serious diseases, and Mallinckrodt Pharmaceuticals, specializing in specialty pharmaceuticals.

🇮🇪 Dublin · 30 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Eaton](https://www.tamtam.ai/c/eaton) (eaton.com)<br>Intelligent power management provider working towards a sustainable future by helping customers manage power, transition to renewable energy, and solve power management challenges globally | Appliances, Electrical, and Electronics Manufacturing | 🇮🇪 Dublin | 51,011 |  |
| 2 | [Smurfit Westrock](https://www.tamtam.ai/c/smurfit-westrock) (smurfitwestrock.com)<br>Global provider of innovative paper-based packaging solutions with extensive operations, mills, and a large workforce across multiple countries. | Packaging and Containers Manufacturing | 🇮🇪 Dublin | 50,141 |  |
| 3 | [Smurfit Kappa](https://www.tamtam.ai/c/smurfit-kappa) (smurfitwestrock.com)<br>A global provider of sustainable paper-based packaging solutions, offering innovative products and expertise to drive success for customers worldwide | Packaging and Containers Manufacturing | 🇮🇪 Dublin | 48,000 |  |
| 4 | [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 |  |
| 5 | [Weatherford](https://www.tamtam.ai/c/weatherford) (weatherford.com)<br>A global energy services company with 17,000 team members in 75 countries, providing solutions for the challenges of the energy industry | Oil and Gas | 🇮🇪 Dublin | 29,301 | 1987 |
| 6 | [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 |  |
| 7 | [Allegion](https://www.tamtam.ai/c/allegion-dublin) (allegion.com)<br>Global leader in seamless access solutions for homes, businesses, schools, and institutions, specializing in securing people and assets around the door | Appliances, Electrical, and Electronics Manufacturing | 🇮🇪 Dublin | 7,123 |  |
| 8 | [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 |  |
| 9 | [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 |
| 10 | [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 |
| 11 | [St James's Hospital Dublin](https://www.tamtam.ai/c/st-james-s-hospital-dublin) (linkin.bio)<br>An academic teaching hospital delivering health treatment, care, and diagnosis while prioritizing education, research, and collaboration with a focus on quality and accountability | Hospitals and Health Care | 🇮🇪 Dublin | 2,788 |  |
| 12 | [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 |
| 13 | [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 |
| 14 | [St. Vincent's University Hospital](https://www.tamtam.ai/c/st-vincent-s-university-hospital) (stvincents.ie)<br>A leading academic teaching hospital providing acute, chronic, and emergency care across 50 medical specialties with international accreditation and pioneering patient care approaches | Hospitals and Health Care | 🇮🇪 Dublin | 2,000 | 1834 |
| 15 | [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 |  |
| 16 | [Kepak Group](https://www.tamtam.ai/c/kepak-group) (kepak.com)<br>Irish-based meat processor with multiple facilities, producing fresh and value-added meat products for international foodservice and retail markets. | Food and Beverage Manufacturing | 🇮🇪 Dublin | 1,409 | 1981 |
| 17 | [FINEOS](https://www.tamtam.ai/c/fineos) (fineos.com)<br>Leading provider of core systems for life, accident, and health insurers globally, offering end-to-end SaaS products for quote to claim administration, digital engagement, and analytics | Software Development | 🇮🇪 Dublin | 838 | 1993 |
| 18 | [Devexperts](https://www.tamtam.ai/c/devexperts) (devexperts.com)<br>Devexperts specializes in developing complex software solutions for the Capital Markets industry, including trading platforms, market data products, and consulting services | Software Development | 🇮🇪 Dublin | 786 | 2002 |
| 19 | [Fenergo](https://www.tamtam.ai/c/fenergo) (fenergo.com)<br>Develops SaaS financial technology solutions for client lifecycle management, regulatory compliance, risk monitoring, operational efficiency, and digital transformation in financial institutions. | Financial Services | 🇮🇪 Dublin | 695 |  |
| 20 | [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 |
| 21 | [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 |
| 22 | [Irish Blood Transfusion Service](https://www.tamtam.ai/c/irish-blood-transfusion-service) (giveblood.ie)<br>This organization supplies blood and blood products to hospitals in Ireland, while also encouraging individuals to become blood donors Visit their website for more information | Non-profit Organizations | 🇮🇪 Dublin | 444 | 1965 |
| 23 | [Lanas Healthcare Technology Ltd](https://www.tamtam.ai/c/lanas-healthcare-technology-ltd) (lanas.com)<br>A healthcare technology company with over 25 products and services empowering 15 million professionals worldwide to provide exceptional patient care | Software Development | 🇮🇪 Dublin | 408 | 2014 |
| 24 | [St. Patrick's Mental Health Services](https://www.tamtam.ai/c/st-patrick-s-mental-health-services) (stpatricks.ie)<br>Innovative mental health provider with deep roots in history, dedicated to offering quality care, promoting awareness, and safeguarding the rights of those with mental illness | Hospitals and Health Care | 🇮🇪 Dublin | 377 | 1745 |
| 25 | [Openet](https://www.tamtam.ai/c/openet) (linkedin.com)<br>A leading software and services provider to communications companies, specializing in digital and 5G business support systems for transformation and growth | IT Services and IT Consulting | 🇮🇪 Dublin | 339 | 1999 |
| 26 | [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 |
| 27 | [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 |
| 28 | [CR2](https://www.tamtam.ai/c/cr2) (cr2.com)<br>A global leader in digital banking and payments, offering a comprehensive platform and partner ecosystem for financial service providers worldwide | Banking | 🇮🇪 Dublin | 249 | 1997 |
| 29 | [Ecocem Global](https://www.tamtam.ai/c/ecocem-global) (ecocemglobal.com)<br>Development and manufacturing of innovative cement technology reducing carbon emissions by 50%, enabling sustainable construction and industry decarbonization. | Construction | 🇮🇪 Dublin | 196 |  |
| 30 | [CameraMatics](https://www.tamtam.ai/c/cameramatics) (cameramatics.com)<br>Provides comprehensive solutions including 360-degree cameras and AI for collision avoidance, ensuring vehicle and team protection. Also offers a hardware-free employee mobility solution for travel expense and emissions tracking. | Technology, Information and Internet | 🇮🇪 Dublin | 139 | 2016 |

## 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 11, 2026.

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## The same list elsewhere in Ireland

- [Companies with in-house R&D in Ireland](https://www.tamtam.ai/l/r-and-d-companies-ireland) (120)

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Source: https://www.tamtam.ai/l/r-and-d-companies-dublin