These multinational companies in Wales operate across diverse sectors, including financial services, higher education, and specialized manufacturing. The list features a mix of well-established institutions like Swansea University, founded in 1920, and major employers such as Admiral Group Plc, a car insurance provider with over 11,000 employees. Other significant firms include Tata Steel UK, producing high-quality steel products, and phs Group, a provider of hygiene services.
A notable pattern among these companies is the concentration of headquarters in major Welsh cities. Cardiff hosts several large employers, including Admiral Group Plc and Cardiff Metropolitan University, alongside specialized firms like IQE in semiconductor manufacturing. Caerphilly is home to phs Group and DHG, a medical device company. This distribution highlights key economic hubs within Wales.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
Admiral Group Plcadmiralgroup.co.uk
Leading car insurance provider in the UK and 7 other countries, focusing on innovation, customer service, and employee satisfaction. |
11,047 | |||
| 2 |
Swansea University / Prifysgol Abertaweswansea.ac.uk
Research-led university offering excellent teaching, producing globally recognized research, and contributing to economic growth and community wellbeing. |
5,646 | |||
| 3 |
Admiral Group - MBA Leadership Programsadmiraljobs.co.uk
A company seeking future leaders who can make a difference, inspire teams, and grow into great leaders within a personalized and impactful environment |
3,515 | |||
| 4 |
Cardiff Metropolitan Universitycardiffmet.ac.uk
Higher education institution focusing on teaching, research, innovation, and community engagement both locally and internationally. |
2,789 | |||
| 5 |
Prifysgol Cymru Y Drindod Dewi Sant / University of Wales Trinity Saint Daviduwtsd.ac.uk
A prestigious university in Wales, offering a dual-sector approach to education with a focus on benefiting learners, employers, and communities |
1,960 | |||
| 6 | 1,481 | ||||
| 7 |
Tata Steel UKtatasteeluk.com
This company produces high quality steel products for various industries, prioritizing innovation, sustainability, and community engagement in all aspects of their operations |
1,375 | |||
| 8 |
Randoxrandox.com
An international health diagnostics company offering a range of products including Biochip Array Technology, clinical chemistry analyzers, reagents, software, and biosciences portfolio |
1,100 | |||
| 9 |
Nidec Drivesnidec.com
Manufacturing and supplying precision electric drive solutions worldwide to enhance performance, efficiency, and productivity across various industries. |
737 | |||
| 10 |
HB Leisure Ltd.hbleisure.com
A global leader in skill games and family entertainment, operating in 25 countries with partnerships in theme parks and leisure sectors |
707 | |||
| 11 |
Finsbury Food Groupfinsburyfoods.co.uk
production of cakes, bread, bakery snacks for UK supermarkets, restaurants, hotels, pubs, including licensed celebration cakes and specialty breads |
636 | |||
| 12 |
BGIwearebgi.com
Tailored recruitment solutions through partnership-driven outsourced labor services in the UK and Europe Comprised of sector specialists for top expertise |
422 | |||
| 13 | 420 | ||||
| 14 |
Nidec Control Techniquescontroltechniques.com
Leading provider of variable speed drives & power conversion technology for commercial and industrial applications, enhancing productivity with innovative products for demanding applications |
365 | |||
| 15 |
DHGdhg-healthcare.com
Supports health forward movement by delivering innovative solutions for individuals impacted by reduced movement, enhancing outcomes and lowering healthcare costs. |
341 | |||
| 16 |
BBI Solutionsbbisolutions.com
Global experts in immunoassay development & manufacturing, offering an extensive portfolio of diagnostic products to enhance quality of life |
335 | |||
| 17 | 335 | ||||
| 18 |
Alcumusalcumus.com
Providing compliance, risk management, certification, HR, health and safety consultancy, and training solutions to create safer, more efficient workplaces globally. |
333 | |||
| 19 |
Simbec-Orionsimbecorion.com
Responsive and agile full-service CRO specializing in clinical pharmacology, oncology, and rare diseases Tailormade solutions for small to mid-size drug developers |
313 | |||
| 20 |
Orangeboxorangebox.com
Specializing in furniture solutions for modern workplaces and hospitality settings, this company delivers global clients research-led designs tailored to their needs |
237 | |||
| 21 |
Flexicare Globalflexicare.com
A global provider of innovative medical devices with over 40 years of experience, supporting clinicians to enhance patient outcomes worldwide |
222 | |||
| 22 |
ecubeecube.aero
Specializes in aircraft storage, disassembly, and transition services connecting owners and parts companies to maximize asset value. |
206 | |||
| 23 |
Bisleythebisleygroup.com
Design and manufacture innovative storage products tailored to meet the evolving needs of modern workplaces with extensive experience. |
205 | |||
| 24 |
Nodor International Limitednodor-darts.com
A global sporting goods company that distributes products worldwide, focused on enhancing athletic performance and enjoyment for customers |
195 | |||
| 25 |
RMS (Retail Merchandising Services)rms.uk.com
A leading merchandising, installation, and retail support company in the UK and Ireland, providing skilled flexible teams to enhance shopping experiences for retail partners |
194 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 26 |
Huntleigh Healthcarehuntleigh-diagnostics.com
A leading global provider of innovative medical equipment for healthcare professionals, specializing in vascular care, fetal monitoring, and patient monitoring solutions |
193 | |||
| 27 |
Siderise Groupsiderise.com
A company providing innovative insulation solutions for fire and acoustic applications internationally, with trusted products used in construction, building services, and other industries |
186 | |||
| 28 |
Intermarine UK Limitedintermarinegroup.com
Global company providing complete peace of mind through technical expertise, meticulous planning, and pragmatic approach to shipping, marine, offshore, and energy projects worldwide |
185 | |||
| 29 |
Sony - UK Technology Centresonypencoed.co.uk
Award-winning manufacturer of broadcast equipment and Raspberry Pi, providing UK service and repair, committed to quality, environment, and energy management. |
185 | |||
| 30 |
Net World Sportsnetworldsports.co.uk
A leading sports equipment supplier with over 15,000 products, serving 30+ sports, shipping to 180+ countries, and partnering with top clubs worldwide |
180 | |||
| 31 |
Sonovatesonovate.com
Financial services and workflow management platform providing funding and payment solutions for recruitment businesses, consultancies, and marketplaces managing global contingent labour forces. |
153 | |||
| 32 |
UnitBirwelcounitbirwelco.com
Design, manufacture, and maintenance of thermal equipment including flare systems, fired heaters, and heat exchangers for oil, gas, power, and pharmaceutical industries. |
149 | |||
| 33 |
NoteMachine UK Ltd - A Brink's Companynotemachine.com
Financial services business serving 15 million customers monthly through 200 UK branches, cash machines in UK & Europe, and large shopping center presence |
149 | |||
| 34 |
FIS Softwaresapiens.com
Development and delivery of packaged global insurance solutions managing life insurance, pensions, and investment products through a single platform. |
120 | |||
| 35 |
OP Chocolate Ltdbaronie.com
A company in South Wales with over 75 years of experience baking high-quality wafers and other confectionery products for UK and European markets |
102 | |||
| 36 |
Biocatalysts Ltdbiocatalysts.com
A biotechnology company producing specialty enzymes on a commercial scale for various industries, developing bio-based solutions through research, production, and distribution services |
102 | |||
| 37 |
CatSci Ltdcatsci.com
Innovative drug development partner offering services from candidate selection to product launch, utilizing critical technologies for safer, greener, and cost-effective therapeutics |
99 | |||
| 38 |
GS Yuasa Battery Europe Ltdgs-yuasa.eu
A leading supplier of high-quality batteries and energy storage solutions for automotive, industrial, and standby power applications with global distribution and manufacturing capabilities |
95 | |||
| 39 |
Penn Pharma, a PCI companypennpharm.co.uk
A leading pharmaceutical services company offering integrated drug development, clinical trial supply, manufacturing, and packaging services to the global healthcare industry |
77 | |||
| 40 |
Space Forgespaceforge.com
Global company leading the clean industrial revolution by harnessing space to develop reusable satellites for manufacturing super materials in space |
75 | |||
| 41 | 70 | ||||
| 42 |
Blackwood Engineeringblackwoodengineering.com
A leading provider of quality castings and counterweights to machinery OEMs globally, offering total supply chain solutions and custom finishing options |
66 | |||
| 43 |
Random Software Ltdrandomsoftware.net
Software development company based in UK and Sri Lanka specialising in creation and maintenance of B2B web and mobile automotive aftermarket applications. |
63 | |||
| 44 |
Carl Kammerling International Ltdcarlkammerling.com
A German company founded in 1904, offering hand tools, power tool accessories, and security products worldwide through own sales teams and distributors |
59 | |||
| 45 |
NOVOMATIC Gaming UKnovomaticgaming.co.uk
A supplier of premium gaming equipment and signage solutions for the UK leisure industry, with a focus on responsible gaming practices |
59 | |||
| 46 |
Pockitpockit.com
Financial services company dedicated to providing current accounts to underserved individuals in the UK, helping them save money on everyday expenses |
54 | |||
| 47 |
Mypinpadmypinpad.com
A UK-based B2B SaaS company enabling secure mobile transactions globally, with bank-grade technology, partner collaborations, and focus on financial inclusion |
52 | |||
| 48 |
Jane Norman Londonjanenorman.co.uk
A leading UK fashion brand targeting young women with affordable and stylish adaptations of catwalk trends, with a strong retail presence |
51 | |||
| 49 |
Newmor Wallcoveringsnewmor.com
Specializing in texture, color, and pattern, this company offers a wide range of fabric-backed vinyl wallcoverings, custom printing, and unique recoloring options globally |
47 | |||
| 50 |
Porvair Sciences Ltdporvairsciences.com
Global manufacturer of consumables, porous plastics, and instruments for life science and analytical labs Providing high quality products for improved analysis and productivity |
46 | |||
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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 11, 2026.
More company lists in Wales
- The largest companies in Wales 570
- Manufacturers in Wales 74
- Retail chains in Wales 50
- Companies with in-house R&D in Wales 38
- Family-owned companies in Wales 36
- Financial services firms in Wales 35
- Financial Services companies in Wales 35
- Hardware manufacturers in Wales 32
- Food and Beverage Manufacturing companies in Wales 29
- SaaS companies in Wales 29
- Retail companies in Wales 28
- Public sector organisations in Wales 28
- Contract manufacturers in Wales 26
- Food and beverage companies in Wales 26
- Hotel and hospitality groups in Wales 26
The same list elsewhere in United Kingdom
- Multinational companies in the United Kingdom 7,458
- Multinational companies in Scotland 248
- Multinational companies in Northern Ireland 84
- Multinational companies in London 3,652
- Multinational companies in Manchester 163
- Multinational companies in Birmingham 78
- Multinational companies in Glasgow 69
- Multinational companies in Cambridge 67
- Multinational companies in Leeds 67
- Multinational companies in Edinburgh 55
- Multinational companies in Milton Keynes 53
- Multinational companies in Reading 42
- Multinational companies in Bristol 41
- Multinational companies in Aberdeen 39
- Multinational companies in Oxford 37
- Multinational companies in Belfast 35
- Multinational companies in Nottingham 34
- Multinational companies in Coventry 30
- Multinational companies in Leicester 29
- Multinational companies in Newcastle upon Tyne 27
- Multinational companies in Watford 27
- Multinational companies in Liverpool 26
- Multinational companies in Sheffield 26