# 50 leading multinational companies in Northern Ireland

Tamtam tracks 84 multinational companies headquartered in Northern Ireland. This list ranks the 50 largest by number of employees on LinkedIn, led by Queen's University Belfast, Ulster University and Almac Group. Their median headcount is 302. Half of them were founded in 1989 or later. The most common headquarters are Belfast (16).

This selection of multinational companies in Northern Ireland highlights a mix of well-established institutions and technology-focused firms. Queen's University Belfast and Ulster University are prominent higher education providers, while Almac Group and Norbrook Laboratories are key players in pharmaceutical manufacturing. Kainos, FD Technologies, and EOS IT Solutions represent the strong IT services sector, contributing to a diverse economic landscape.

A notable pattern among these companies is the presence of several older, large organizations alongside younger technology companies. For instance, GRAHAM Group, founded in 1778, and McLaughlin & Harvey Ltd, established in 1853, are long-standing construction firms. In contrast, FinTrU, founded in 2013, specializes in financial services with a technology emphasis, showcasing a blend of traditional industries and modern innovation.

🇬🇧 Northern Ireland · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Queen's University Belfast](https://www.tamtam.ai/c/queen-s-university-belfast) (qub.ac.uk)<br>A renowned university with over 150 years of academic excellence, offering a wide range of degree programs and a strong research focus | Higher Education | 🇬🇧 Belfast | 7,278 | 1845 |
| 2 | [Ulster University](https://www.tamtam.ai/c/ulster-university) (ulster.ac.uk)<br>A multi-campus university in Northern Ireland, focused on research, teaching, employability, and industry collaboration to support student success and career readiness | Higher Education | 🇬🇧 Belfast | 5,911 | 1968 |
| 3 | [Almac Group](https://www.tamtam.ai/c/almac-group) (almacgroup.com)<br>Providing drug development, biomarker discovery, clinical trial supply, analytical services, and commercial manufacturing solutions for pharmaceutical and biotech companies worldwide. | Pharmaceutical Manufacturing | 🇬🇧 Craigavon | 4,888 | 1968 |
| 4 | [Kainos](https://www.tamtam.ai/c/kainos) (kainos.com)<br>Utilizing technology to solve customer problems, Kainos transforms businesses and improves lives through Digital Services and the Workday Practice globally | IT Services and IT Consulting | 🇬🇧 Belfast | 3,317 | 1986 |
| 5 | [FD Technologies](https://www.tamtam.ai/c/fd-technologies) (fdtechnologies.com)<br>A data-driven group that offers technology, services in capital markets, and predictive marketing solutions to drive organizations forward globally | IT Services and IT Consulting | 🇬🇧 Newry | 2,025 | 1996 |
| 6 | [GRAHAM Group](https://www.tamtam.ai/c/graham-group) (graham.co.uk)<br>Specializes in delivering construction and development projects across the UK and Ireland, encompassing building, civil engineering, interior fit out, facilities management, and investment projects. | Construction | 🇬🇧 Hillsborough | 1,933 | 1778 |
| 7 | [EOS IT Solutions](https://www.tamtam.ai/c/eos-it-solutions) (eosits.com)<br>A family-run global technology company providing IT support services, innovative solutions, and international deployment for industry leaders in various domains worldwide | IT Services and IT Consulting | 🇬🇧 Banbridge | 1,733 |  |
| 8 | [Norbrook Laboratories ltd](https://www.tamtam.ai/c/norbrook-laboratories-ltd) (norbrook.com)<br>A global provider of veterinary pharmaceuticals for farm and companion animals, investing in manufacturing, laboratories, IT infrastructure, and offering diverse career opportunities | Pharmaceutical Manufacturing | 🇬🇧 Newry | 1,069 | 1969 |
| 9 | [FinTrU](https://www.tamtam.ai/c/fintru) (fintru.com)<br>Specializing in KYC, Compliance, Risk, and Legal services, this company creates technology-based Client Lifecycle Management solutions for global financial institutions from various locations worldwide | Financial Services | 🇬🇧 Belfast | 1,032 | 2013 |
| 10 | [Liberty IT](https://www.tamtam.ai/c/liberty-it) (liberty-it.co.uk)<br>A technology company backed by global giant Liberty Mutual Insurance, specializing in problem-solving, innovation, and customer interactions with a focus on employee well-being | Software Development | 🇬🇧 Belfast | 835 | 1997 |
| 11 | [McLaughlin & Harvey Ltd](https://www.tamtam.ai/c/mclaughlin-and-harvey-ltd) (mclh.co.uk)<br>Construction, civil engineering, and fit-out projects and facilities management services for public and private clients across diverse sectors throughout the UK and Ireland. | Construction | 🇬🇧 Newtownabbey | 557 | 1853 |
| 12 | [CDE Group](https://www.tamtam.ai/c/cde-group) (cdegroup.com)<br>Leading company specializing in innovative materials washing equipment and services, delivering professional client experiences with award-winning management. | Machinery Manufacturing | 🇬🇧 Cookstown | 536 | 1992 |
| 13 | [Everway](https://www.tamtam.ai/c/everway) (everway.com)<br>Focus on unlocking and maximizing individual potential through personal development, empowerment, and growth strategies for every person. | Software Development | 🇬🇧 Antrim | 457 |  |
| 14 | [Totalmobile Ltd](https://www.tamtam.ai/c/totalmobile-ltd) (totalmobile.com)<br>Field service management organization providing technology to improve work and the lives of mobile workers, offering integrated solutions for operational excellence and ROI | Software Development | 🇬🇧 Belfast | 429 | 1985 |
| 15 | [Westland Horticulture Ltd](https://www.tamtam.ai/c/westland-horticulture-ltd) (gardenhealth.com)<br>Leading UK horticultural company offering innovative gardening products, wild bird care brands, and creative solutions to common gardening problems | Manufacturing | 🇬🇧 Dungannon | 428 | 1990 |
| 16 | [Dale Farm Ltd](https://www.tamtam.ai/c/dale-farm-ltd) (dalefarm.com)<br>Farmer-owned dairy cooperative producing award-winning dairy products from local milk for retail, foodservice, and export markets, with a focus on innovation and sustainability | Food and Beverage Manufacturing | 🇬🇧 Belfast | 415 |  |
| 17 | [Brett Martin Ltd](https://www.tamtam.ai/c/brett-martin-ltd) (brettmartin.com)<br>Global supplier of specialist plastic products including plastic sheets, rooflight systems, and plumbing/drainage systems for construction, fabrication, print, and display sectors worldwide | Plastics Manufacturing | 🇬🇧 Newtownabbey | 414 | 1958 |
| 18 | [Eakin Healthcare](https://www.tamtam.ai/c/eakin-healthcare) (eakinhealthcare.com)<br>Family-owned healthcare company providing medical devices for ostomy, wound, respiratory, and surgical needs globally, including manufacturing and distribution services in multiple countries | Medical Equipment Manufacturing | 🇬🇧 Comber | 409 | 1973 |
| 19 | [Omexom UK](https://www.tamtam.ai/c/omexom-uk) (omexom.co.uk)<br>Specializing in electricity generation, transmission, distribution, and substation design and construction to support the energy transition for clients in the UK and Ireland | Construction | 🇬🇧 Belfast | 394 | 1998 |
| 20 | [FG Wilson](https://www.tamtam.ai/c/fg-wilson) (fgwilson.com)<br>Global supplier of diesel generator sets, with wide range of products from 68 to over 2,500 kVA, installed in over 150 countries, supported by dealer network worldwide | Appliances, Electrical, and Electronics Manufacturing | 🇬🇧 Larne | 376 | 1966 |
| 21 | [Camlin Group](https://www.tamtam.ai/c/camlin-group) (camlingroup.com)<br>A provider of innovative monitoring products and services improving safety, efficiency, resilience, and sustainability of electricity and rail networks | Energy Technology | 🇬🇧 Lisburn | 366 | 2008 |
| 22 | [PwC \| Operate](https://www.tamtam.ai/c/pwc-operate)<br>A provider of operational and managed services solutions for clients, focusing on regulatory, risk, and compliance issues with expertise in technology | Outsourcing and Offshoring Consulting | 🇬🇧 Belfast | 357 | 2017 |
| 23 | [Alternative Heat Ltd](https://www.tamtam.ai/c/alternative-heat-ltd) (alternativeheat.co.uk)<br>A market leader in offsite fabrication for MEP solutions, offering high-quality products through experienced design engineers and skilled trades personnel | Construction | 🇬🇧 Banbridge | 330 | 2003 |
| 24 | [MJM Marine](https://www.tamtam.ai/c/mjm-marine) (mjm-group.com)<br>A global marine outfitting company based in Northern Ireland, specializing in crafting high-spec, bespoke spaces for leading cruise liner brands worldwide | Construction | 🇬🇧 Newry | 320 | 1983 |
| 25 | [Kane Group](https://www.tamtam.ai/c/kane-group) (kanegroup.co.uk)<br>Designing, developing, and delivering building-service solutions across the UK and Ireland with a focus on quality, health, and safety. | Construction | 🇬🇧 Banbridge | 302 | 2003 |
| 26 | [Cubis Systems](https://www.tamtam.ai/c/cubis-systems) (cubis-systems.com)<br>Manufacture lightweight, high-strength composite plastic systems for underground infrastructure including access chambers, cable protection, and sealing accessories. | Plastics Manufacturing | 🇬🇧 | 244 | 2009 |
| 27 | [AROUND NOON.](https://www.tamtam.ai/c/around-noon) (aroundnoon.com)<br>An award-winning food manufacturer specializing in food-to-go, serving blue-chip clients across various sectors with high-quality products delivered daily | Food and Beverage Manufacturing | 🇬🇧 Newry | 243 | 1989 |
| 28 | [Haldane Fisher NI](https://www.tamtam.ai/c/haldane-fisher-ni) (haldane-fisher.com)<br>Leading independent supplier to construction industry in UK and Ireland, offering building materials, plumbing products, home improvement items, and engineered timber solutions | Wholesale Building Materials | 🇬🇧 Newry | 235 | 1946 |
| 29 | [DV8fashion](https://www.tamtam.ai/c/dv8fashion) (dv8fashion.com)<br>A popular UK and Ireland-based fashion retailer with over 50 stores and an online platform offering a wide range of clothing and footwear brands since 1994 | Retail | 🇬🇧 Craigavon | 228 | 1992 |
| 30 | [Mannok](https://www.tamtam.ai/c/mannok) (mannokbuild.com)<br>Manufacturing premium building materials including thermal blocks, cement, roof tiles, insulation and precast concrete while providing technical support and sustainable construction solutions. | Wholesale Building Materials | 🇬🇧 Derrylin | 203 |  |
| 31 | [STATSports](https://www.tamtam.ai/c/statsports) (linktr.ee)<br>A leading sports technology company developing wearable monitoring devices for athletes worldwide, used by elite teams in various sports | Software Development | 🇬🇧 Newry | 193 | 2008 |
| 32 | [Grant Thornton (NI) LLP](https://www.tamtam.ai/c/grant-thornton-ni-llp) (grantthorntonni.com)<br>A growing professional services firm offering innovative solutions to business challenges with a focus on long-term relationships and core values | Professional Services | 🇬🇧 Belfast | 190 | 1899 |
| 33 | [Murdock Builders Merchants](https://www.tamtam.ai/c/murdock-builders-merchants) (murdockbuildersmerchants.com)<br>Supplier of building materials and timber with multiple branches across Ireland, supporting home and garden construction and renovation projects. | Wholesale Building Materials | 🇬🇧 Newry | 188 | 1982 |
| 34 | [Ulster Carpets](https://www.tamtam.ai/c/ulster-carpets) (ulstercarpets.com)<br>Leading carpet manufacturer designing high-tech, prestigious carpets for discerning clients worldwide Headquarters in Northern Ireland with global sales offices and design studios | Textile Manufacturing | 🇬🇧 Portadown | 184 | 1938 |
| 35 | [H & J Martin Limited](https://www.tamtam.ai/c/h-and-j-martin-limited) (hjmartin.co.uk)<br>A construction company with over 175 years of experience, specializing in asset management, construction, and fit out services within Ireland | Construction | 🇬🇧 Belfast | 183 | 1840 |
| 36 | [Lowe Rental - Refrigeration and Catering Specialists](https://www.tamtam.ai/c/lowe-rental-refrigeration-and-catering-specialists) (lowerental.com)<br>Supplier of energy-efficient refrigeration, catering equipment, cold rooms, and temporary kitchens with worldwide delivery, installation, and maintenance services. | Facilities Services | 🇬🇧 Lisburn | 181 | 1977 |
| 37 | [Lagan Specialist Holdings](https://www.tamtam.ai/c/lagan-specialist-holdings) (laganscg.com)<br>Undertakes specialist contracting activities including Aviation & Infrastructure, Piling, Operations and Maintenance, Facilities Management, Fit Out, civil engineering, and building projects globally. | Construction | 🇬🇧 Belfast | 175 |  |
| 38 | [Ryobi Aluminium Casting (UK) Ltd](https://www.tamtam.ai/c/ryobi-aluminium-casting-uk-ltd) (ryobi.co.uk)<br>Manufacturer of high-quality aluminium automotive components, part of the Ryobi Group, aiming to be the top die casting company in Europe | Motor Vehicle Manufacturing | 🇬🇧 Co Antrim | 158 | 1990 |
| 39 | [Egis in Ireland](https://www.tamtam.ai/c/egis-in-ireland) (egis-group.com)<br>Leading consulting engineers in Ireland providing high quality and innovative designs in civil, environmental, structural, and transportation sectors, now part of Egis Group | Civil Engineering | 🇬🇧 Dundrum Road | 152 | 1994 |
| 40 | [Uform](https://www.tamtam.ai/c/uform) (uform.co.uk)<br>A leading manufacturer and distributor of doors and accessories for the kitchen, bedroom, and furniture trade in the UK and Ireland | Furniture and Home Furnishings Manufacturing | 🇬🇧 Toomebridge | 144 | 1993 |
| 41 | [Belfast International Airport](https://www.tamtam.ai/c/belfast-international-airport) (belfastairport.com)<br>Northern Ireland's principal airport serving over 70 domestic and international destinations, with a range of customer airlines, cargo services, and car parks | Airlines and Aviation | 🇬🇧 Belfast | 132 |  |
| 42 | [Cooneen Group](https://www.tamtam.ai/c/cooneen-group) (cooneengroup.com)<br>Group of companies designing and supplying character nightwear, military clothing, body armour, and workwear with strong global supply chains. | Retail Apparel and Fashion | 🇬🇧 Fivemiletown | 129 | 1966 |
| 43 | [Elite Electronic Systems Ltd](https://www.tamtam.ai/c/elite-electronic-systems-ltd) (elite.tech)<br>Leading provider of Sub-Contract Electronic Manufacturing Services for various industries, adhering to quality standards, with state-of-the-art equipment and flexible scheduling | Appliances, Electrical, and Electronics Manufacturing | 🇬🇧 Enniskillen | 117 | 1986 |
| 44 | [Prestige Underwriting](https://www.tamtam.ai/c/prestige-underwriting) (prestigeunderwriting.co.uk)<br>A trusted MGA since 1997, specializing in creating bespoke standard and non-standard insurance products for brokers through partnership and innovation | Insurance | 🇬🇧 Carrickfergus | 116 | 1997 |
| 45 | [Crust & Crumb](https://www.tamtam.ai/c/crust-and-crumb) (crust-crumb.com)<br>Leading Irish manufacturer of a wide range of dough-based products, specializing in private-label pizza bases, topped pizzas, garlic breads, wraps, and flatbreads | Food and Beverage Manufacturing | 🇬🇧 Derrylin | 114 | 2012 |
| 46 | [MiFinity](https://www.tamtam.ai/c/mifinity) (mifinity.com)<br>A global payments provider offering cost-effective and secure payment solutions for online gaming, travel, Forex, and eCommerce sectors worldwide | Financial Services | 🇬🇧 Belfast | 113 | 2002 |
| 47 | [Fern Software](https://www.tamtam.ai/c/fern-software) (fernsoftware.com)<br>A global provider of banking software for inclusive financial institutions, offering solutions for improved operations, product development, and community support | IT Services and IT Consulting | 🇬🇧 Belfast | 110 | 1979 |
| 48 | [JP Corry](https://www.tamtam.ai/c/jp-corry) (jpcorry.com)<br>A leading builders' merchant in Northern Ireland, offering a wide range of building materials, washroom solutions, and expert advice to trade and DIY customers | Wholesale Building Materials | 🇬🇧 Belfast | 109 |  |
| 49 | [DELI LITES IRELAND](https://www.tamtam.ai/c/deli-lites-ireland) (delilites.com)<br>A company specializing in human resources services and solutions, with a focus on recruitment, training, and development for businesses Contact: humanresources@delilitescom | Food and Beverage Manufacturing | 🇬🇧 Warrenpoint | 102 | 1998 |
| 50 | [Copius Group](https://www.tamtam.ai/c/copius-group) (copiusgroup.com)<br>Provides comprehensive electrical, mechanical, and construction services for offshore and onshore projects, focusing on power, renewables, oil & gas, and critical infrastructure globally. | Construction | 🇬🇧 Newtownabbey | 96 | 2008 |

## 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 Northern Ireland

- [The largest companies in Northern Ireland](https://www.tamtam.ai/l/largest-companies-northern-ireland) (354)
- [Manufacturers in Northern Ireland](https://www.tamtam.ai/l/manufacturers-northern-ireland) (48)
- [Retail chains in Northern Ireland](https://www.tamtam.ai/l/retail-chains-northern-ireland) (40)
- [Software Development companies in Northern Ireland](https://www.tamtam.ai/l/software-development-companies-northern-ireland) (30)
- [Companies with in-house R&D in Northern Ireland](https://www.tamtam.ai/l/r-and-d-companies-northern-ireland) (28)
- [Retail companies in Northern Ireland](https://www.tamtam.ai/l/retail-companies-northern-ireland) (27)
- [Family-owned companies in Northern Ireland](https://www.tamtam.ai/l/family-owned-companies-northern-ireland) (27)
- [Financial services firms in Northern Ireland](https://www.tamtam.ai/l/financial-services-firms-northern-ireland) (26)
- [Construction companies in Northern Ireland](https://www.tamtam.ai/l/construction-companies-northern-ireland) (26)
- [Food and Beverage Manufacturing companies in Northern Ireland](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-northern-ireland) (25)

## The same list elsewhere in United Kingdom

- [Multinational companies in the United Kingdom](https://www.tamtam.ai/l/multinational-companies-united-kingdom) (7,458)
- [Multinational companies in Scotland](https://www.tamtam.ai/l/multinational-companies-scotland) (248)
- [Multinational companies in Wales](https://www.tamtam.ai/l/multinational-companies-wales) (69)
- [Multinational companies in London](https://www.tamtam.ai/l/multinational-companies-london) (3,652)
- [Multinational companies in Manchester](https://www.tamtam.ai/l/multinational-companies-manchester) (163)
- [Multinational companies in Birmingham](https://www.tamtam.ai/l/multinational-companies-birmingham) (78)
- [Multinational companies in Glasgow](https://www.tamtam.ai/l/multinational-companies-glasgow) (69)
- [Multinational companies in Cambridge](https://www.tamtam.ai/l/multinational-companies-cambridge) (67)
- [Multinational companies in Leeds](https://www.tamtam.ai/l/multinational-companies-leeds) (67)
- [Multinational companies in Edinburgh](https://www.tamtam.ai/l/multinational-companies-edinburgh) (55)
- [Multinational companies in Milton Keynes](https://www.tamtam.ai/l/multinational-companies-milton-keynes) (53)
- [Multinational companies in Reading](https://www.tamtam.ai/l/multinational-companies-reading) (42)
- [Multinational companies in Bristol](https://www.tamtam.ai/l/multinational-companies-bristol) (41)
- [Multinational companies in Aberdeen](https://www.tamtam.ai/l/multinational-companies-aberdeen) (39)
- [Multinational companies in Oxford](https://www.tamtam.ai/l/multinational-companies-oxford) (37)
- [Multinational companies in Belfast](https://www.tamtam.ai/l/multinational-companies-belfast) (35)
- [Multinational companies in Nottingham](https://www.tamtam.ai/l/multinational-companies-nottingham) (34)
- [Multinational companies in Coventry](https://www.tamtam.ai/l/multinational-companies-coventry) (30)
- [Multinational companies in Leicester](https://www.tamtam.ai/l/multinational-companies-leicester) (29)
- [Multinational companies in Newcastle upon Tyne](https://www.tamtam.ai/l/multinational-companies-newcastle-upon-tyne) (27)
- [Multinational companies in Watford](https://www.tamtam.ai/l/multinational-companies-watford) (27)
- [Multinational companies in Liverpool](https://www.tamtam.ai/l/multinational-companies-liverpool) (26)
- [Multinational companies in Sheffield](https://www.tamtam.ai/l/multinational-companies-sheffield) (26)

## The same list elsewhere

- [Multinational companies in the world](https://www.tamtam.ai/l/multinational-companies-in-the-world) (74,925)
- [Multinational companies in Europe](https://www.tamtam.ai/l/multinational-companies-in-europe) (42,025)

---

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