# The 100 largest multinational companies in Ireland

Tamtam tracks 564 multinational companies headquartered in Ireland. This list ranks the 100 largest by number of employees on LinkedIn, led by Accenture, Johnson Controls and Eaton. Their median headcount is 2,576. Half of them were founded in 1981 or later. The most common headquarters are Dublin (64), Cork (5) and Galway (5).

These are large multinational companies with significant operations in Ireland, spanning a diverse range of sectors from industrial manufacturing to retail and technology. Accenture provides professional services globally, while Johnson Controls leads in smart building solutions. Eaton specializes in intelligent power management, and Smurfit Westrock is a global provider of paper-based packaging. Primark is an international fashion retailer, and Ryanair is Europe's largest airline group.

Dublin emerges as a prominent hub, with many of these large employers headquartered there. This concentration indicates a strong presence of global corporate operations and services within the capital, alongside specialized manufacturing in other regions like Cork and Galway.

🇮🇪 Ireland · 100 companies · Updated Nov 11, 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 | [Primark](https://www.tamtam.ai/c/primark) (primark.com)<br>International fashion retailer, over 470 stores, offering affordable fashion and everyday essentials at unbeatable prices for everyone. | Retail | 🇮🇪 Dublin | 45,876 | 1969 |
| 7 | [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 |  |
| 8 | [Musgrave](https://www.tamtam.ai/c/musgrave) (musgravegroup.com)<br>Leading food retail, wholesale, and foodservice provider in Ireland with 19 market-leading brands, supporting thousands of family businesses and jobs. | Retail | 🇮🇪 Ireland | 41,000 | 1876 |
| 9 | [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 |  |
| 10 | [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 |
| 11 | [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 |
| 12 | [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 |  |
| 13 | [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 |
| 14 | [Keywords Studios](https://www.tamtam.ai/c/keywords-studios) (keywordsstudios.com)<br>A leading creative services provider for the global video games industry, offering end-to-end solutions and support across all aspects of game development | Computer Games | 🇮🇪 Dublin | 11,828 | 1998 |
| 15 | [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 |  |
| 16 | [University College Dublin](https://www.tamtam.ai/c/university-college-dublin) (ucd.ie)<br>Research-intensive university offering undergraduate, masters, PhD education, fostering innovation, global engagement, and diverse academic disciplines across multiple campuses. | Higher Education | 🇮🇪 Dublin | 8,585 | 1854 |
| 17 | [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 |  |
| 18 | [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 |  |
| 19 | [Trinity College Dublin](https://www.tamtam.ai/c/trinity-college-dublin) (tcd.ie)<br>Leading Irish university offering world-class education and research, recognized globally for academic excellence and high international rankings. | Higher Education | 🇮🇪 Dublin | 7,268 | 1592 |
| 20 | [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 |  |
| 21 | [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 |  |
| 22 | [Descon Engineering Limited](https://www.tamtam.ai/c/descon-engineering-limited) (descon.com)<br>An integrated engineering services and manufacturing company operating in Pakistan and the Middle East, delivering client-specific solutions for Energy, Infrastructure, and Process industries | Education | 🇮🇪 Lahore | 6,444 |  |
| 23 | [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 |  |
| 24 | [ESB](https://www.tamtam.ai/c/esb) (esb.ie)<br>A company focused on providing secure, sustainable, and affordable electricity supplies to enhance societal, economic well-being, driven by innovation and collaboration for a brighter future | Utilities | 🇮🇪 Dublin | 4,937 | 1927 |
| 25 | [University of Galway](https://www.tamtam.ai/c/university-of-galway) (universityofgalway.ie)<br>Irish research-led academic institution providing high-quality teaching and excellence in research while fostering strong community outreach and support for the Irish language. | Higher Education | 🇮🇪 Galway | 4,759 | 1845 |
| 26 | [Cpl](https://www.tamtam.ai/c/cpl) (cpl.com)<br>Global provider of talent solutions across sectors, with 14,000 employees in 14 countries, specializing in matching the right talent to organizations | Staffing and Recruiting | 🇮🇪 Dublin | 4,748 |  |
| 27 | [PM Group](https://www.tamtam.ai/c/pm-group) (pmgroup-global.com)<br>Specializes in designing, constructing, and commissioning high-tech facilities for pharma, food, data centers, medical technology, manufacturing, and energy sectors globally. | Business Consulting and Services | 🇮🇪 Dublin | 4,477 | 1973 |
| 28 | [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 |
| 29 | [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 |  |
| 30 | [Version 1](https://www.tamtam.ai/c/version-1) (version1.com)<br>IT services and solutions provider trusted by global brands, offering independent advice to navigate the evolving IT landscape and drive customer success | IT Services and IT Consulting | 🇮🇪 Dublin | 3,944 | 1996 |
| 31 | [Aer Lingus](https://www.tamtam.ai/c/aer-lingus) (aerlingus.com)<br>National airline of Ireland operating modern fleet, connecting UK, Europe, North America via Dublin and Shannon airports with US Pre-Clearance. | Airlines and Aviation | 🇮🇪 Dublin | 3,884 | 1936 |
| 32 | [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 |
| 33 | [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 |
| 34 | [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 |
| 35 | [Concern Worldwide](https://www.tamtam.ai/c/concern-worldwide) (concern.net)<br>International humanitarian organization working with poorest communities to improve lives and influence policies reducing extreme poverty globally. | Non-profit Organizations | 🇮🇪 Dublin | 3,327 | 1968 |
| 36 | [Tyco SimplexGrinnell](https://www.tamtam.ai/c/tyco-simplexgrinnell) (tycosimplexgrinnell.com)<br>A global leader in fire protection, security, HVAC, building controls, and energy storage, delivering customized solutions to meet customers' needs | Security and Investigations | 🇮🇪 Cork | 3,232 |  |
| 37 | [Centra](https://www.tamtam.ai/c/centra-cork) (centra.ie)<br>Market-leading convenience store brand partnering with local retailers Focus on health with nutritious on-the-go food options, redefining convenience retail market | Retail | 🇮🇪 Cork | 3,179 |  |
| 38 | [Jones Engineering](https://www.tamtam.ai/c/jones-engineering) (joneseng.com)<br>Multi-disciplined engineering contracting company providing a complete range of engineering and building services installations globally, working with multi-nationals and delivering projects safely | Construction | 🇮🇪 Dublin | 3,019 | 1890 |
| 39 | [KPMG Ireland](https://www.tamtam.ai/c/kpmg-ireland) (kpmg.ie)<br>A leading provider of audit, tax, and advisory services for domestic and international clients across all sectors, specializing in driving value and navigating change | Accounting | 🇮🇪 Dublin | 2,978 |  |
| 40 | [Digital Marketing Institute](https://www.tamtam.ai/c/digital-marketing-institute) (digitalmarketinginstitute.com)<br>This company offers online digital marketing courses aligned with industry needs, providing skills, industry insights, and a supportive community for professionals | Higher Education | 🇮🇪 Blackrock | 2,912 | 2008 |
| 41 | [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 |
| 42 | [Zurich Insurance plc](https://www.tamtam.ai/c/zurich-insurance-plc) (zurich.com)<br>Insurance provider with operations in Ireland and nine other European countries, part of a global network with over 55,000 employees worldwide | Insurance | 🇮🇪 Dublin | 2,910 | 1872 |
| 43 | [Mercury](https://www.tamtam.ai/c/mercury-dublin) (mercuryeng.com)<br>Design and manage complex engineering and construction projects for leading corporations, delivering innovative solutions that connect communities and businesses. | Construction | 🇮🇪 Dublin | 2,864 | 1972 |
| 44 | [Planet](https://www.tamtam.ai/c/planet) (weareplanet.com)<br>The company provides software, payment, and technology solutions for the Hospitality and Retail sectors globally, focusing on innovative digital commerce platforms | IT Services and IT Consulting | 🇮🇪 Galway | 2,825 | 1985 |
| 45 | [Smyths Toys Superstores](https://www.tamtam.ai/c/smyths-toys-superstores) (smythstoys.com)<br>Retailer specializing in a wide range of children's toys, video games, baby products, and outdoor play items across multiple stores. | Retail | 🇮🇪 Galway | 2,806 | 1987 |
| 46 | [Lidl Ireland](https://www.tamtam.ai/c/lidl-ireland) (lidl.ie)<br>Retail grocery chain offering high-quality products at low prices, operating numerous stores across Ireland and Northern Ireland with a large workforce. | Retail | 🇮🇪 Dublin | 2,706 |  |
| 47 | [IPL Schoeller](https://www.tamtam.ai/c/ipl-schoeller) (iplschoeller.com)<br>Design and manufacture smart, reusable circular packaging solutions supporting efficient, scalable, and sustainable supply chains across multiple industries worldwide. | Packaging and Containers Manufacturing | 🇮🇪 | 2,704 |  |
| 48 | [Paddy Power](https://www.tamtam.ai/c/paddy-power) (careers.flutteruki.com)<br>International sports betting and gaming operator with leading brands in the UK, Ireland, Australia, and the USA, offering online and mobile services to millions of customers worldwide | Entertainment Providers | 🇮🇪 Dublin | 2,668 |  |
| 49 | [John Sisk & Son Ltd](https://www.tamtam.ai/c/john-sisk-and-son-ltd) (sisk.com)<br>Innovative engineering and construction company with extensive operations across Ireland, UK, and Europe, providing comprehensive construction services since 1859. | Construction | 🇮🇪 Dublin | 2,593 | 1859 |
| 50 | [Applegreen](https://www.tamtam.ai/c/applegreen) (applegreenstores.com)<br>Roadside hospitality convenience retailer with inviting spaces, quality amenities, EV charging, trusted brands, own food and coffee brands, focusing on guest experience. | Retail | 🇮🇪 Dublin | 2,576 |  |
| 51 | [Marcus Evans Group](https://www.tamtam.ai/c/marcus-evans-group) (marcusevans.com)<br>A global leader in business intelligence, offering diverse portfolios including summits, conferences, professional training, and market intelligence to help clients achieve strategic goals | Events Services | 🇮🇪 Dublin | 2,543 | 1983 |
| 52 | [PwC Ireland](https://www.tamtam.ai/c/pwc-ireland) (pwc.ie)<br>Global network providing assurance, advisory, and tax services with a commitment to quality and building trust in society. | Professional Services | 🇮🇪 Dublin | 2,502 |  |
| 53 | [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 |
| 54 | [daa](https://www.tamtam.ai/c/daa) (daa.ie)<br>Global airport and travel retail group managing airports in Dublin and Cork, operating airport retailing worldwide, and providing aviation consultancy services internationally | Airlines and Aviation | 🇮🇪 Swords | 2,343 | 1937 |
| 55 | [S&W Ireland](https://www.tamtam.ai/c/s-and-w-ireland) (swgroup.com)<br>Providing expert tax, accountancy, assurance, and advisory services to support Irish and international businesses through growth, risks, and exits. | Professional Services | 🇮🇪 Dublin | 2,293 | 1958 |
| 56 | [Iarnród Éireann Irish Rail](https://www.tamtam.ai/c/iarnrod-eireann-irish-rail) (irishrail.ie)<br>The national railway system operator in Ireland, providing intercity, commuter, and freight services within the Republic of Ireland and to Belfast | Rail Transportation | 🇮🇪 Dublin | 2,157 | 1987 |
| 57 | [PokerStars](https://www.tamtam.ai/c/pokerstars) (careers.flutterinternational.com)<br>Leading global poker platform committed to quality entertainment Empowering team members to bring pace, responsibility, and team spirit to create unique experiences worldwide | Entertainment Providers | 🇮🇪 Dublin | 2,046 |  |
| 58 | [Covalen](https://www.tamtam.ai/c/covalen-dublin) (covalensolutions.com)<br>A trusted partner providing agile outsourcing solutions to Fortune 500 companies, offering multilingual services in customer experience, operations, and trust & safety | Outsourcing and Offshoring Consulting | 🇮🇪 Dublin | 2,030 |  |
| 59 | [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 |  |
| 60 | [Linesight](https://www.tamtam.ai/c/linesight) (linesight.com)<br>Provides professional consultancy, management support, and strategic advice to the global construction industry from concept to completion across diverse sectors worldwide. | Construction | 🇮🇪 Dublin | 1,931 | 1974 |
| 61 | [Tesco Ireland](https://www.tamtam.ai/c/tesco-ireland) (tescoireland.ie)<br>Large Irish retailer. Serves customers and communities. Supports local suppliers. Provides diverse career opportunities across retail, head office, and distribution centers. | Retail | 🇮🇪 Dublin | 1,905 |  |
| 62 | [GOAL Global](https://www.tamtam.ai/c/goal-global) (goalglobal.org)<br>Specializing in emergency response, health, nutrition, food security, and livelihoods, we support vulnerable communities in crises, poverty, and exclusion | Non-profit Organizations | 🇮🇪 Dun Laoghaire | 1,860 | 1977 |
| 63 | [BrowserStack](https://www.tamtam.ai/c/browserstack) (browserstack.com)<br>Provides instant access to thousands of real devices and browsers for functional, visual, and performance testing through AI-powered cloud infrastructure and tools. | Software Development | 🇮🇪 Dublin | 1,797 | 2011 |
| 64 | [Aldi Ireland](https://www.tamtam.ai/c/aldi-ireland) (aldirecruitment.ie)<br>Established in 1913, this global retailer operates over 6,500 stores worldwide, including in Ireland, the UK, Europe, Australia, China, and the USA | Retail | 🇮🇪 Ireland | 1,771 | 1913 |
| 65 | [Oldcastle](https://www.tamtam.ai/c/oldcastle) (crh.com)<br>Leading provider of building materials solutions worldwide, offering materials, products, and services for infrastructure, commercial projects, and outdoor living | Wholesale Building Materials | 🇮🇪 Dublin | 1,768 |  |
| 66 | [Circet IRE & UK](https://www.tamtam.ai/c/circet-ire-and-uk) (circet.ie)<br>Industry-leading company providing fully managed services to the Telecommunications, Transport Infrastructure, and Power Sectors in Ireland, UK, and internationally since 1975 | Utilities | 🇮🇪 Clondalkin | 1,753 |  |
| 67 | [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 |  |
| 68 | [Kirby Group Engineering](https://www.tamtam.ai/c/kirby-group-engineering) (kirbygroup.com)<br>A leading Mechanical and Electrical engineering contractor offering HV/MV design & build services, off-site manufacturing, and expertise in Data Centres, Life Sciences, and more | Construction | 🇮🇪 Limerick | 1,683 | 1964 |
| 69 | [Creditsafe](https://www.tamtam.ai/c/creditsafe) (creditsafe.com)<br>A global provider of business credit reports and information, empowering companies with data to make informed decisions and drive growth | Information Services | 🇮🇪 Dublin | 1,670 | 1997 |
| 70 | [Waystone](https://www.tamtam.ai/c/waystone) (waystone.com)<br>Global provider of governance, administration, risk, and compliance services supporting institutional investors and asset managers in managing investment structures. | Financial Services | 🇮🇪 Ballsbridge | 1,610 | 2000 |
| 71 | [Playrix](https://www.tamtam.ai/c/playrix) (playrix.com)<br>A top mobile game company with 120 million monthly players, attributing its success to a talented global team prioritizing people over ideas | Computer Games | 🇮🇪 Dublin | 1,599 | 2004 |
| 72 | [Deloitte Ireland](https://www.tamtam.ai/c/deloitte-ireland) (deloitte.com)<br>Global professional services network delivering solutions and insights to address complex business challenges, with leadership capabilities, experience, and collaboration with clients | Management Consulting | 🇮🇪 Dublin 2 | 1,594 |  |
| 73 | [GAA](https://www.tamtam.ai/c/gaa) (gaa.ie)<br>A global organization promoting Irish sports, language, and culture through Gaelic games, with a democratic structure and headquarters in Dublin | Spectator Sports | 🇮🇪 Dublin | 1,477 | 1884 |
| 74 | [Enterprise Ireland](https://www.tamtam.ai/c/enterprise-ireland) (enterprise-ireland.com)<br>Supporting Irish enterprises in international markets through development, growth, innovation, and export sales to drive employment and economic growth | International Trade and Development | 🇮🇪 Dublin | 1,475 |  |
| 75 | [Mater Private Network](https://www.tamtam.ai/c/mater-private-network) (materprivate.ie)<br>Advanced healthcare provider offering specialized services including Heart and Vascular, Spine, Cancer, Surgery, and Robotic-assisted Surgery, with a focus on patient-centered care and innovation | Hospitals and Health Care | 🇮🇪 Dublin | 1,471 | 1986 |
| 76 | [Dornan](https://www.tamtam.ai/c/dornan) (dornan.ie)<br>A multidisciplinary organization focusing on delivering high-quality Mechanical, Electrical, Instrumentation, and Commissioning services for various projects, prioritizing client satisfaction and safety | Construction | 🇮🇪 Cork | 1,460 |  |
| 77 | [Morgan McKinley](https://www.tamtam.ai/c/morgan-mckinley) (morganmckinley.com)<br>Global talent services expert providing recruitment, executive search, and talent acquisition solutions across multiple professional disciplines worldwide. | Staffing and Recruiting | 🇮🇪 Cork | 1,430 |  |
| 78 | [H&MV Engineering](https://www.tamtam.ai/c/h-and-mv-engineering) (hmvengineering.com)<br>Global provider of specialist design, engineering, and construction services for data centers, substations, renewables, manufacturing, & pharmaceuticals with a focus on safety and sustainability | Construction | 🇮🇪 Limerick | 1,427 | 1997 |
| 79 | [Independent Contractor](https://www.tamtam.ai/c/independent-contractor-dublin) (codertal.com)<br>Codertal connects big IT companies with top-tier IT contractors, offering on-demand services, software development, recruitment assistance, and cost-effective staffing solutions | IT Services and IT Consulting | 🇮🇪 Dublin | 1,410 |  |
| 80 | [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 |
| 81 | [Ornua](https://www.tamtam.ai/c/ornua) (ornua.com)<br>Global dairy cooperative exporting Irish dairy products to 110 countries, with consumer brands and ingredients divisions managed by 3,000 employees worldwide | Food and Beverage Manufacturing | 🇮🇪 Dublin | 1,396 | 1961 |
| 82 | [Glanbia Performance Nutrition (GPN)](https://www.tamtam.ai/c/glanbia-performance-nutrition-gpn) (glanbia.com)<br>A global nutrition company focused on inspiring people to achieve performance, healthy lifestyle, and weight management goals through various leading brands | Food and Beverage Services | 🇮🇪 Kilkenny | 1,354 | 1985 |
| 83 | [Department of Foreign Affairs and Trade, Ireland](https://www.tamtam.ai/c/department-of-foreign-affairs-and-trade-ireland) (ireland.ie)<br>This company represents Ireland's interests internationally, promotes investment and tourism, provides consular services to citizens abroad, and supports Irish communities worldwide | Government Administration | 🇮🇪 Dublin | 1,341 |  |
| 84 | [Designer Group](https://www.tamtam.ai/c/designer-group) (designergrp.com)<br>International provider of innovative electrical and mechanical services, sustainable energy solutions, and industrial solutions, with a focus on safety, quality, and sustainability | Construction | 🇮🇪 Dublin | 1,335 | 1992 |
| 85 | [Leonardo Hotels UK & Ireland](https://www.tamtam.ai/c/leonardo-hotels-uk-and-ireland) (leonardohotels.co.uk)<br>A rapidly expanding hotel chain with over 150 hotels in 13 countries, offering comfortable accommodation for business and leisure guests with excellent amenities | Hospitality | 🇮🇪 Dublin | 1,335 |  |
| 86 | [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 |  |
| 87 | [ABP Food Group](https://www.tamtam.ai/c/abp-food-group) (abpfoodgroup.com)<br>Largest beef processor in Ireland and UK with renewable energy, pet food, and protein divisions employing over 14,000 people. | Food and Beverage Manufacturing | 🇮🇪 Ardee | 1,300 | 1954 |
| 88 | [Fexco](https://www.tamtam.ai/c/fexco) (fexco.com)<br>A global innovator in FX, treasury, digital tax, and government financing, simplifying processes and empowering partners with fresh thinking | Financial Services | 🇮🇪 Killorglin | 1,278 | 1981 |
| 89 | [Elavon Europe](https://www.tamtam.ai/c/elavon-europe) (elavon.co.uk)<br>A leading payments provider offering tailored solutions across Europe and the USA, with a focus on reliability, global connectivity, and customer service excellence | Financial Services | 🇮🇪 Dublin | 1,241 |  |
| 90 | [IPL](https://www.tamtam.ai/c/ipl-640430) (iplschoeller.com)<br>A top packaging provider offering sustainable solutions for various industries including food, consumer, agriculture, logistics, and the environment | Plastics Manufacturing | 🇮🇪 Dublin 2 | 1,208 | 2005 |
| 91 | [BOYLE Sports](https://www.tamtam.ai/c/boyle-sports) (careers.boylesports.com)<br>A leading independent bookmaker offering betting and gaming services in Ireland, UK, and international markets, with over 375 shops and 2,700 employees globally Proud sponsors of various sports events | Gambling Facilities and Casinos | 🇮🇪 Dundalk | 1,199 | 1982 |
| 92 | [Actavo](https://www.tamtam.ai/c/actavo) (actavo.com)<br>An international strategic operations partner with diverse services, delivering excellence through rigorous quality standards, safety performance, and customer experience | Utilities | 🇮🇪 Dublin | 1,175 | 1967 |
| 93 | [AMCS Group](https://www.tamtam.ai/c/amcs-group) (amcsgroup.com)<br>Global leader in integrated software and vehicle technology for environmental, waste, recycling, and EHSQ industries, improving efficiency, margins, and customer service | Environmental Services | 🇮🇪 Ballysimon | 1,165 | 2003 |
| 94 | [Matheson LLP](https://www.tamtam.ai/c/matheson-llp) (matheson.com)<br>A global legal services provider with expertise in various practice areas, serving internationally focused companies and financial institutions operating in Ireland | Law Practice | 🇮🇪 Dublin | 1,139 | 1825 |
| 95 | [JJ Rhatigan & Company](https://www.tamtam.ai/c/jj-rhatigan-and-company) (jjrhatigan.com)<br>A leading general building contractor in Ireland and London, specializing in high-quality, sustainable construction projects for various sectors including commercial, residential, healthcare, and more | Construction | 🇮🇪 Galway | 1,114 | 1952 |
| 96 | [ESW](https://www.tamtam.ai/c/esw) (esw.com)<br>Simplify international ecommerce by localizing checkout, ensuring smooth delivery and returns, managing compliance, and providing expert growth strategies. | Technology, Information and Internet | 🇮🇪 Dublin | 1,100 | 2010 |
| 97 | [Tirlán](https://www.tamtam.ai/c/tirlan) (tirlan.com)<br>A world-class food and nutrition business with a diverse portfolio of products for consumer, agri, and international markets, focusing on sustainability and innovation | Food and Beverage Services | 🇮🇪 Kilkenny | 1,095 |  |
| 98 | [Suir Engineering](https://www.tamtam.ai/c/suir-engineering) (suireng.com)<br>A company with 40 years of international expertise in electrical, mechanical, and high voltage services, specializing in various sectors across Europe | Construction | 🇮🇪 Waterford | 1,078 | 1984 |
| 99 | [Anord Mardix](https://www.tamtam.ai/c/anord-mardix) (anordmardix.com)<br>Global leader in critical power distribution and protection, offering bespoke solutions and innovative products Part of a $24B diversified manufacturer | Appliances, Electrical, and Electronics Manufacturing | 🇮🇪 Dundalk | 1,074 |  |
| 100 | [Ivy Technology](https://www.tamtam.ai/c/ivy-technology) (ivytech.com)<br>Global provider of electronics repair and service for tech, med-tech, and telecom companies with innovative, efficient, and trustworthy solutions. | Computer Hardware Manufacturing | 🇮🇪 Dublin | 1,067 |  |

## 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.

## More company lists in Ireland

- [The largest companies in Ireland](https://www.tamtam.ai/l/largest-companies-ireland) (1,769)
- [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)
- [Government Administration companies in Ireland](https://www.tamtam.ai/l/government-administration-companies-ireland) (57)

## The same list elsewhere in Ireland

- [Multinational companies in Dublin](https://www.tamtam.ai/l/multinational-companies-dublin) (287)

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