# 48 leading publicly traded companies in Ireland

Tamtam tracks 49 publicly traded companies headquartered in Ireland. This list ranks the 48 largest by number of employees on LinkedIn, led by Accenture, Johnson Controls and Eaton. Their median headcount is 1,306. Half of them were founded in 1997 or later. The most common headquarters are Dublin (27) and Belfast (2).

This list covers publicly traded companies based in Ireland, primarily featuring large multinational groups. Sectors represented include business consulting with Accenture, industrial technology with TE Connectivity, and packaging solutions from Smurfit Kappa and Smurfit Westrock. Other significant firms are Johnson Controls, a global leader in smart building solutions, and Eaton, which focuses on intelligent power management.

A notable pattern among these companies is their global reach, with many headquartered in Dublin but operating extensively across international markets. This indicates a strong presence of Irish-based entities with worldwide operations, particularly in industrial manufacturing, technology, and professional services.

🇮🇪 Ireland · 48 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Accenture](https://www.tamtam.ai/c/accenture) (accenture.com)<br>It provides professional services to businesses and governments, focusing on digital transformation, operational optimization, and enhancing citizen services globally. | Business Consulting and Services | 🇮🇪 Dublin | 687,682 |  |
| 2 | [Johnson Controls](https://www.tamtam.ai/c/johnson-controls) (johnsoncontrols.com)<br>Global leader in transforming environments through smart, healthy, and sustainable buildings Offering innovative digital solutions for various industries worldwide | Industrial Machinery Manufacturing | 🇮🇪 Cork | 67,718 |  |
| 3 | [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 |  |
| 4 | [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 |  |
| 5 | [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 |  |
| 6 | [TE Connectivity](https://www.tamtam.ai/c/te-connectivity) (te.com)<br>A global leader in industrial technology manufacturing, specializing in connectivity and sensor solutions for various industries to create a safer, sustainable, and connected future | Appliances, Electrical, and Electronics Manufacturing | 🇮🇪 Galway | 41,478 |  |
| 7 | [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 |  |
| 8 | [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 |
| 9 | [Ryanair - Europe's Favourite Airline](https://www.tamtam.ai/c/ryanair-europe-s-favourite-airline) (ryanair.com)<br>Europe's largest airline group, offering over 3,000 daily flights to 225 airports, with a plan to carry 225m+ guests annually | Airlines and Aviation | 🇮🇪 Co Dublin | 21,217 | 1985 |
| 10 | [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 |  |
| 11 | [Cimpress](https://www.tamtam.ai/c/cimpress) (cimpress.com)<br>Cimpress plc invests in mass-customization businesses, providing personalized products to meet individual customer needs with near mass production efficiency | Technology, Information and Internet | 🇮🇪 Dundalk | 12,460 | 1995 |
| 12 | [Flutter Entertainment](https://www.tamtam.ai/c/flutter-entertainment) (flutter.com)<br>Global provider of sports betting, gaming, and entertainment, serving over 18 million customers worldwide through leading consumer brands Vision to be global online leader | Entertainment Providers | 🇮🇪 Dublin | 7,681 |  |
| 13 | [CRH](https://www.tamtam.ai/c/crh) (crh.com)<br>Global leader in building materials solutions, with market leadership in North America and Europe, offering materials for infrastructure projects and sustainable construction | Wholesale Building Materials | 🇮🇪 Dublin | 7,256 |  |
| 14 | [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 |  |
| 15 | [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 |  |
| 16 | [Glanbia](https://www.tamtam.ai/c/glanbia) (glanbia.com)<br>A global nutrition company creating better products, sustainable practices, and high-quality nutrition to help people live full, healthy lives | Food and Beverage Services | 🇮🇪 Kilkenny | 4,176 | 1997 |
| 17 | [Flutter International](https://www.tamtam.ai/c/flutter-international) (careers.flutterinternational.com)<br>Global sports betting, gaming, and entertainment provider with innovative brands focused on championing play, empowerment, and teamwork for millions of customers worldwide | Entertainment Providers | 🇮🇪 Dublin | 4,076 |  |
| 18 | [DCC plc](https://www.tamtam.ai/c/dcc-plc) (dccenergy.com)<br>A global group providing solutions in energy, healthcare, and technology sectors through diverse businesses across 22 countries, driving long-term value creation | Executive Offices | 🇮🇪 Dublin | 3,820 | 1976 |
| 19 | [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 |
| 20 | [PTSB](https://www.tamtam.ai/c/ptsb) (ptsb.ie)<br>The company provides banking services and emphasizes privacy and security by directing customers to customer service on Facebook and Twitter | Banking | 🇮🇪 Dublin | 3,251 |  |
| 21 | [Kingspan Group](https://www.tamtam.ai/c/kingspan-group) (kingspan.com)<br>Global leader in high-performance insulation and building envelope solutions for construction, aiming to improve building performance and create a sustainable future | Wholesale Building Materials | 🇮🇪 Kingscourt | 2,910 | 1965 |
| 22 | [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 |
| 23 | [Origin Enterprises Plc](https://www.tamtam.ai/c/origin-enterprises-plc) (originenterprises.com)<br>Provides technically-led agricultural solutions promoting sustainable land use, empowering customers across multiple countries to maximize land potential. | Holding Companies | 🇮🇪 Dublin | 1,956 |  |
| 24 | [Dole plc](https://www.tamtam.ai/c/dole-plc) (doleplc.com)<br>The company grows, sources, packs, markets, and distributes fresh produce globally, focusing on quality, sustainability, and healthy eating from farm to fork. | Food and Beverage Manufacturing | 🇮🇪 Dublin | 1,306 |  |
| 25 | [Dalata Hotel Group](https://www.tamtam.ai/c/dalata-hotel-group) (dalatahotelgroup.com)<br>Bringing hospitality to hotels worldwide, Dalata focuses on caring for guests through unique experiences at their 53 locations in Ireland, UK, Germany, and the Netherlands | Hospitality | 🇮🇪 Dublin | 1,020 | 2007 |
| 26 | [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 |
| 27 | [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 |  |
| 28 | [Moog Controls Corporation (Philippine Branch)](https://www.tamtam.ai/c/moog-controls-corporation-philippine-branch) (moog.com)<br>A worldwide designer and integrator of precision motion control products and systems for various industries, with a strong focus on culture and integrity | Aviation and Aerospace Component Manufacturing | 🇮🇪 Baguio City | 779 | 1984 |
| 29 | [AerCap](https://www.tamtam.ai/c/aercap) (aercap.com)<br>Global aviation leasing leader with a strong order book, serving 300+ customers worldwide with fleet solutions Listed on NYSE, headquartered in Dublin | Airlines and Aviation | 🇮🇪 Dublin | 739 | 1995 |
| 30 | [Cairn](https://www.tamtam.ai/c/cairn) (cairnhomes.com)<br>Focused on creating sustainable communities that support individuals in thriving Embracing the #BuiltForGood ethos to drive positive change | Construction | 🇮🇪 Dublin City | 581 | 2015 |
| 31 | [Gambling.com Group](https://www.tamtam.ai/c/gambling-com-group) (grandstand.com)<br>A multi-award-winning digital marketing company focused on the online gambling industry, operating websites in multiple languages across 15 markets Publicly traded on Nasdaq | Advertising Services | 🇮🇪 Dublin | 510 | 2006 |
| 32 | [Hostelworld Group](https://www.tamtam.ai/c/hostelworld-group) (hostelworld.com)<br>A social network-powered OTA in the hostelling sector, connecting travelers through social features and aiming to help them find people to hang out with | Travel Arrangements | 🇮🇪 Dublin | 474 | 1999 |
| 33 | [Glenveagh Properties plc](https://www.tamtam.ai/c/glenveagh-properties-plc) (glenveagh.ie)<br>Leading Irish homebuilder focused on delivering sustainable, high-quality homes in diverse communities through innovation, integration, and a commitment to customer satisfaction | Construction | 🇮🇪 Maynooth | 420 | 2017 |
| 34 | [Grafton Group plc](https://www.tamtam.ai/c/grafton-group-plc) (graftonplc.com)<br>An international distributor of building materials with leading positions in UK, Ireland, and the Netherlands, also manufacturing dry mortar and operating DIY retail stores | Wholesale Building Materials | 🇮🇪 Sandyford | 384 |  |
| 35 | [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 |
| 36 | [Global Payments](https://www.tamtam.ai/c/global-payments) (globalpaymentsinc.com)<br>Global Payments provides scalable, technology-driven payment solutions tailored to businesses of all sizes, enabling growth, expansion, and seamless transactions worldwide | IT Services and IT Consulting | 🇮🇪 Leicester | 361 | 1967 |
| 37 | [Diaceutics PLC](https://www.tamtam.ai/c/diaceutics-plc) (diaceutics.com)<br>Provider of a diagnostic commercialization platform for precision medicine, facilitating access to tailored treatments through a global network of laboratories | Pharmaceutical Manufacturing | 🇮🇪 Belfast | 210 | 2005 |
| 38 | [Connolly Motor Group](https://www.tamtam.ai/c/connolly-motor-group) (connollys.ie)<br>A family-run automotive group with 14 dealerships in west Ireland, offering new and used vehicles from top brands, car buying services, and exceptional customer care | Retail Motor Vehicles | 🇮🇪 Ballina \| Sligo \| Letterkenny \| Galway | 141 | 1939 |
| 39 | [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 |  |
| 40 | [Cirata](https://www.tamtam.ai/c/cirata) (cirata.com)<br>Specializes in migrating Hadoop data lakes to cloud platforms, enabling AI and analytics with flexibility, efficiency, and risk reduction. | Data Infrastructure and Analytics | 🇮🇪 Belfast | 71 | 2023 |
| 41 | [grenke Ireland](https://www.tamtam.ai/c/grenke-ireland) (grenke.ie)<br>The company provides fast, simple, and personalized financial solutions to businesses, offering leasing, invoice finance, and tailored options for various industries and start-ups | Financial Services | 🇮🇪 Sandyford Business Park | 57 | 2004 |
| 42 | [Cybertek](https://www.tamtam.ai/c/cybertek) (cybertek.ie)<br>An ICT and Business Services provider offering friendly, efficient solutions including technology training, internet security, e-commerce solutions, and corporate image management | IT Services and IT Consulting | 🇮🇪 | 23 | 1999 |
| 43 | [Accenture PLC](https://www.tamtam.ai/c/accenture-plc) (accenture.com)<br>A global management consulting and professional services firm offering strategy, digital, technology, and operations services to clients worldwide | IT Services and IT Consulting | 🇮🇪 Dublin | 17 | 1989 |
| 44 | [bxp software](https://www.tamtam.ai/c/bxp-software) (bxpsoftware.com)<br>It provides tailored web-based software solutions including CRM, Contact Centre Management, eLearning, and Quality Assurance for various industries. | Software Development | 🇮🇪 Dublin | 8 | 2005 |
| 45 | [Malin Corporation plc](https://www.tamtam.ai/c/malin-corporation-plc) (malinplc.com)<br>An investment company focused on supporting innovative life sciences companies to bring transformative outcomes for patients and value for shareholders | Biotechnology Research | 🇮🇪 Dublin | 6 | 2015 |
| 46 | [TONA Commercial Interiors Ltd.](https://www.tamtam.ai/c/tona-commercial-interiors-ltd) (tona.ie)<br>A leading office fit out and design company in Ireland, specializing in project management to create functional workspaces tailored to clients' needs | Furniture and Home Furnishings Manufacturing | 🇮🇪 Co. Kildare | 5 | 1997 |
| 47 | [Business Talk](https://www.tamtam.ai/c/business-talk) (businesstalk.ie)<br>Specialized PR agency in Ireland focused on Financial Services sector Services include media relations, messaging, and editorial support to enhance clients' media presence | Public Relations and Communications Services | 🇮🇪 Dublin | 5 |  |
| 48 | [IM TECH Industrial Manufacturing Technologies Ltd](https://www.tamtam.ai/c/im-tech-industrial-manufacturing-technologies-ltd) (imtech.ie)<br>Specializing in subcontract manufacturing of prototypes, special tooling, jigs, fixtures, and CNC batch production of precision components with quality assurance and high-tech machinery | Industrial Machinery Manufacturing | 🇮🇪 Limerick | 3 |  |

## 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)
- [Software Development companies in Ireland](https://www.tamtam.ai/l/software-development-companies-ireland) (176)
- [Retail chains in Ireland](https://www.tamtam.ai/l/retail-chains-ireland) (166)
- [Financial services firms in Ireland](https://www.tamtam.ai/l/financial-services-firms-ireland) (143)
- [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)
- [IT services companies in Ireland](https://www.tamtam.ai/l/it-services-companies-ireland) (77)
- [Construction companies in Ireland](https://www.tamtam.ai/l/construction-companies-ireland) (70)
- [Healthcare providers in Ireland](https://www.tamtam.ai/l/healthcare-providers-ireland) (69)
- [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 in Ireland

- [Publicly traded companies in Dublin](https://www.tamtam.ai/l/publicly-traded-companies-dublin) (27)

## The same list elsewhere

- [Publicly traded companies in the world](https://www.tamtam.ai/l/publicly-traded-companies-in-the-world) (11,535)
- [Publicly traded companies in Europe](https://www.tamtam.ai/l/publicly-traded-companies-in-europe) (3,623)

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