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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).

馃嚞馃嚙 Northern Ireland50 companiesUpdated Nov 12, 2026

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.

#CompanyIndustryHeadquarters EmployeesFounded
1
Queen's University Belfastqub.ac.uk

A renowned university with over 150 years of academic excellence, offering a wide range of degree programs and a strong research focus

Higher Education 馃嚞馃嚙 Belfast 7,278 1845
2
Ulster Universityulster.ac.uk

A multi-campus university in Northern Ireland, focused on research, teaching, employability, and industry collaboration to support student success and career readiness

Higher Education 馃嚞馃嚙 Belfast 5,911 1968
3
Almac Groupalmacgroup.com

Providing drug development, biomarker discovery, clinical trial supply, analytical services, and commercial manufacturing solutions for pharmaceutical and biotech companies worldwide.

Pharmaceutical Manufacturing 馃嚞馃嚙 Craigavon 4,888 1968
4
Kainoskainos.com

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 馃嚞馃嚙 Belfast 3,317 1986
5
FD Technologiesfdtechnologies.com

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 馃嚞馃嚙 Newry 2,025 1996
6
GRAHAM Groupgraham.co.uk

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 馃嚞馃嚙 Hillsborough 1,933 1778
7
EOS IT Solutionseosits.com

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 馃嚞馃嚙 Banbridge 1,733 n/a
8
Norbrook Laboratories ltdnorbrook.com

A global provider of veterinary pharmaceuticals for farm and companion animals, investing in manufacturing, laboratories, IT infrastructure, and offering diverse career opportunities

Pharmaceutical Manufacturing 馃嚞馃嚙 Newry 1,069 1969
9
FinTrUfintru.com

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 馃嚞馃嚙 Belfast 1,032 2013
10
Liberty ITliberty-it.co.uk

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 馃嚞馃嚙 Belfast 835 1997
11
McLaughlin & Harvey Ltdmclh.co.uk

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 馃嚞馃嚙 Newtownabbey 557 1853
12
CDE Groupcdegroup.com

Leading company specializing in innovative materials washing equipment and services, delivering professional client experiences with award-winning management.

Machinery Manufacturing 馃嚞馃嚙 Cookstown 536 1992
13
Everwayeverway.com

Focus on unlocking and maximizing individual potential through personal development, empowerment, and growth strategies for every person.

Software Development 馃嚞馃嚙 Antrim 457 n/a
14
Totalmobile Ltdtotalmobile.com

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 馃嚞馃嚙 Belfast 429 1985
15
Westland Horticulture Ltdgardenhealth.com

Leading UK horticultural company offering innovative gardening products, wild bird care brands, and creative solutions to common gardening problems

Manufacturing 馃嚞馃嚙 Dungannon 428 1990
16
Dale Farm Ltddalefarm.com

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 馃嚞馃嚙 Belfast 415 n/a
17
Brett Martin Ltdbrettmartin.com

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 馃嚞馃嚙 Newtownabbey 414 1958
18
Eakin Healthcareeakinhealthcare.com

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 馃嚞馃嚙 Comber 409 1973
19
Omexom UKomexom.co.uk

Specializing in electricity generation, transmission, distribution, and substation design and construction to support the energy transition for clients in the UK and Ireland

Construction 馃嚞馃嚙 Belfast 394 1998
20
FG Wilsonfgwilson.com

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 馃嚞馃嚙 Larne 376 1966
21
Camlin Groupcamlingroup.com

A provider of innovative monitoring products and services improving safety, efficiency, resilience, and sustainability of electricity and rail networks

Energy Technology 馃嚞馃嚙 Lisburn 366 2008
22
PwC | Operate

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 馃嚞馃嚙 Belfast 357 2017
23
Alternative Heat Ltdalternativeheat.co.uk

A market leader in offsite fabrication for MEP solutions, offering high-quality products through experienced design engineers and skilled trades personnel

Construction 馃嚞馃嚙 Banbridge 330 2003
24
MJM Marinemjm-group.com

A global marine outfitting company based in Northern Ireland, specializing in crafting high-spec, bespoke spaces for leading cruise liner brands worldwide

Construction 馃嚞馃嚙 Newry 320 1983
25
Kane Groupkanegroup.co.uk

Designing, developing, and delivering building-service solutions across the UK and Ireland with a focus on quality, health, and safety.

Construction 馃嚞馃嚙 Banbridge 302 2003

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26
Cubis Systemscubis-systems.com

Manufacture lightweight, high-strength composite plastic systems for underground infrastructure including access chambers, cable protection, and sealing accessories.

Plastics Manufacturing 馃嚞馃嚙 244 2009
27
AROUND NOON.aroundnoon.com

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 馃嚞馃嚙 Newry 243 1989
28
Haldane Fisher NIhaldane-fisher.com

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 馃嚞馃嚙 Newry 235 1946
29
DV8fashiondv8fashion.com

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 馃嚞馃嚙 Craigavon 228 1992
30
Mannokmannokbuild.com

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 馃嚞馃嚙 Derrylin 203 n/a
31
STATSportslinktr.ee

A leading sports technology company developing wearable monitoring devices for athletes worldwide, used by elite teams in various sports

Software Development 馃嚞馃嚙 Newry 193 2008
32
Grant Thornton (NI) LLPgrantthorntonni.com

A growing professional services firm offering innovative solutions to business challenges with a focus on long-term relationships and core values

Professional Services 馃嚞馃嚙 Belfast 190 1899
33
Murdock Builders Merchantsmurdockbuildersmerchants.com

Supplier of building materials and timber with multiple branches across Ireland, supporting home and garden construction and renovation projects.

Wholesale Building Materials 馃嚞馃嚙 Newry 188 1982
34
Ulster Carpetsulstercarpets.com

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 馃嚞馃嚙 Portadown 184 1938
35
H & J Martin Limitedhjmartin.co.uk

A construction company with over 175 years of experience, specializing in asset management, construction, and fit out services within Ireland

Construction 馃嚞馃嚙 Belfast 183 1840
36
Lowe Rental - Refrigeration and Catering Specialistslowerental.com

Supplier of energy-efficient refrigeration, catering equipment, cold rooms, and temporary kitchens with worldwide delivery, installation, and maintenance services.

Facilities Services 馃嚞馃嚙 Lisburn 181 1977
37
Lagan Specialist Holdingslaganscg.com

Undertakes specialist contracting activities including Aviation & Infrastructure, Piling, Operations and Maintenance, Facilities Management, Fit Out, civil engineering, and building projects globally.

Construction 馃嚞馃嚙 Belfast 175 n/a
38
Ryobi Aluminium Casting (UK) Ltdryobi.co.uk

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 馃嚞馃嚙 Co Antrim 158 1990
39
Egis in Irelandegis-group.com

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 馃嚞馃嚙 Dundrum Road 152 1994
40
Uformuform.co.uk

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 馃嚞馃嚙 Toomebridge 144 1993
41
Belfast International Airportbelfastairport.com

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 馃嚞馃嚙 Belfast 132 n/a
42
Cooneen Groupcooneengroup.com

Group of companies designing and supplying character nightwear, military clothing, body armour, and workwear with strong global supply chains.

Retail Apparel and Fashion 馃嚞馃嚙 Fivemiletown 129 1966
43
Elite Electronic Systems Ltdelite.tech

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 馃嚞馃嚙 Enniskillen 117 1986
44
Prestige Underwritingprestigeunderwriting.co.uk

A trusted MGA since 1997, specializing in creating bespoke standard and non-standard insurance products for brokers through partnership and innovation

Insurance 馃嚞馃嚙 Carrickfergus 116 1997
45
Crust & Crumbcrust-crumb.com

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 馃嚞馃嚙 Derrylin 114 2012
46
MiFinitymifinity.com

A global payments provider offering cost-effective and secure payment solutions for online gaming, travel, Forex, and eCommerce sectors worldwide

Financial Services 馃嚞馃嚙 Belfast 113 2002
47
Fern Softwarefernsoftware.com

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 馃嚞馃嚙 Belfast 110 1979
48
JP Corryjpcorry.com

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 馃嚞馃嚙 Belfast 109 n/a
49
DELI LITES IRELANDdelilites.com

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 馃嚞馃嚙 Warrenpoint 102 1998
50
Copius Groupcopiusgroup.com

Provides comprehensive electrical, mechanical, and construction services for offshore and onshore projects, focusing on power, renewables, oil & gas, and critical infrastructure globally.

Construction 馃嚞馃嚙 Newtownabbey 96 2008

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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.

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