The United Kingdom's pharmaceutical sector is represented here by large groups and established firms. GSK, with over 92,000 employees, unites science and technology for healthcare and disease prevention. AstraZeneca, another major player, focuses on transforming healthcare through scientific potential. Reckitt provides hygiene, wellness, and nourishment products, while Smith+Nephew designs medical technologies. Haleon, founded in 2022, concentrates on everyday health, and Hikma Pharmaceuticals manufactures and supplies generic and specialty products globally.
A notable pattern among these companies is the strong concentration of headquarters in London. GSK, Haleon, Hikma Pharmaceuticals, Convatec, LivaNova, LGC, Accord Healthcare, and ViiV Healthcare are all based in the capital. This suggests a significant hub for pharmaceutical and medical technology businesses within the city.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 92,092 | ||||
| 2 |
AstraZenecaastrazeneca.com
Pioneering healthcare transformation through the potential of science, impacting individuals, society, and the environment for a healthier future |
79,513 | |||
| 3 |
Reckittreckitt.com
Focus on providing high-quality hygiene, wellness, and nourishment products, aiming for global access and sustainable growth for healthier communities. |
43,000 | |||
| 4 |
Smith+Nephewsmith-nephew.com
Design and manufacture medical technologies supporting healthcare professionals to restore patient health and mobility, enhancing performance and quality of life. |
19,222 | |||
| 5 |
Haleonhaleon.com
The company is focused on improving everyday health through a human-centered approach They promote community guidelines for social media interactions #HelloHaleon |
18,581 | |||
| 6 |
Hikma Pharmaceuticalshikma.com
Manufacturing and supplying over 800 generic, specialty, and branded pharmaceutical products to hospitals, physicians, and pharmacists globally. |
10,626 | |||
| 7 |
Convatecconvatecgroup.com
Delivering pioneering and trusted medical solutions focused on improving the lives of patients and healthcare providers worldwide. |
6,954 | |||
| 8 |
Hillromhillrom.com
A global medtech leader committed to saving and sustaining lives, redefining healthcare through compassion, innovation, and meaningful change |
5,300 | |||
| 9 |
Almac Groupalmacgroup.com
Providing drug development, biomarker discovery, clinical trial supply, analytical services, and commercial manufacturing solutions for pharmaceutical and biotech companies worldwide. |
4,888 | |||
| 10 |
LivaNovalivanova.com
Global medical technology company with advanced technologies and breakthrough treatments focused on improving patient lives worldwide in cardiopulmonary and neuromodulation |
3,545 | |||
| 11 |
Orion Pharmaorionpharma.com
Development manufacturing marketing of human and veterinary pharmaceuticals focusing on oncology, pain, neurological and respiratory diseases treatments. |
3,167 | |||
| 12 |
LGClgcgroup.com
Global life science tools company providing mission-critical components and solutions in human healthcare and applied markets, with a focus on genomic analysis and quality assurance applications |
2,500 | |||
| 13 |
Mundipharmamundipharma.com
A global healthcare company dedicated to bringing innovative treatments to patients in Pain Management, Infectious Disease, Consumer Healthcare, and other disease areas |
2,071 | |||
| 14 |
Accord Healthcareaccord-healthcare.com
Development, manufacturing, and distribution of affordable medicines across over 85 countries, focusing on patient access and healthcare improvement. |
2,038 | |||
| 15 |
ViiV Healthcareviivhealthcare.com
A global HIV specialist company focused on researching new medicines and improving access to care for people living with HIV |
1,960 | |||
| 16 |
Dechradechra.com
Development, manufacture, and sales of high-quality veterinary pharmaceuticals and related products supporting veterinarians worldwide with training and information. |
1,902 | |||
| 17 | 1,880 | ||||
| 18 | 1,482 | ||||
| 19 |
Necsanecsa.co.za
The company's focus is on administering nuclear energy matters in South Africa, covering safety, technology, and non-proliferation to facilitate industry leadership |
1,384 | |||
| 20 |
PrimeVigilanceprimevigilance.com
Leading Pharmacovigilance specialist delivering global solutions for clinical and post-marketing safety, medical information, regulatory support, and quality management services worldwide |
1,365 | |||
| 21 |
Oxford Nanopore Technologiesnanoporetech.com
Innovative biotech company developing portable DNA and RNA sequencing technology for real-time data delivery and scalable analysis in over 100 countries worldwide |
1,352 | |||
| 22 |
ABF Ingredientsabfingredients.com
Development and production of specialty ingredients for food, health, pharmaceutical, animal health, and various industrial applications worldwide. |
1,177 | |||
| 23 |
Allogacencora.com
An international healthcare supply chain network providing warehousing, distribution, contract management, packaging, labelling, and support solutions for the industry |
1,135 | |||
| 24 |
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 | |||
| 25 |
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 |
1,069 | |||
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 |
NextPharmanextpharma.com
NextPharma is a leading European CDMO partner offering fast, flexible, and personalized solutions for pharmaceutical development and manufacturing in various industries |
977 | |||
| 27 |
APCER Life Sciencesapcerls.com
Global provider of drug safety, pharmacovigilance, regulatory services, and risk management programs for pharmaceutical companies worldwide, with expertise in medical writing and quality assurance |
943 | |||
| 28 | 940 | ||||
| 29 |
Qinecsa Solutionsqinecsa.com
A global life science partner offering industry-leading pharmacovigilance technology and expert scientific solutions to efficiently manage drug safety data |
936 | |||
| 30 |
Sterling Pharma Solutionssterlingpharmasolutions.com
A global organization with 50+ years of experience providing API development and manufacturing services to the pharmaceutical industry, specializing in complex chemistries |
908 | |||
| 31 |
Eisai EMEAeisai.eu
development of innovative medicines addressing high unmet medical needs in oncology and neurology with patient-centered healthcare philosophy |
895 | |||
| 32 |
Alliance Medical UKalliancemedical.co.uk
Europe's top independent imaging services provider improving imaging processes and patient outcomes for over 20 years with expertise and knowledge |
857 | |||
| 33 |
Healthcare at Homesciensus.com
A leading healthcare provider delivering clinical care and medication services to patients in their homes across the UK and Europe |
834 | |||
| 34 |
Advanced Medical Solutionsadmedsol.com
Specializing in advanced wound care and closure products, this UK-based company provides innovative and technologically advanced solutions through design, development, and manufacturing services |
830 | |||
| 35 |
Terumo Aorticterumoaortic.com
Partnering with customers to provide innovative, versatile, and precise aortic care solutions, including implantable devices and digital technologies. |
812 | |||
| 36 |
Quotient Sciencesquotientsciences.com
A drug development and manufacturing accelerator offering integrated programs and tailored services to get drugs to patients faster and more efficiently |
811 | |||
| 37 | 803 | ||||
| 38 |
Intersurgicalintersurgical.com
Global designer, manufacturer, and supplier of high-quality medical devices for respiratory care, offering solutions for airway management, anaesthesia, critical care, and oxygen therapy |
790 | |||
| 39 |
Autolus Therapeuticsautolus.com
Clinical-stage biopharmaceutical company developing next-generation T cell therapies for cancer treatment by engineering targeted and active therapies to eliminate cancer cells |
755 | |||
| 40 |
ADVANZ PHARMAadvanzpharma.com
Global pharmaceutical company providing specialty, hospital, and rare disease medicines through partnerships and direct commercial presence worldwide. |
734 | |||
| 41 |
Corin Groupcoringroup.com
Development and provision of advanced orthopaedic products and services designed to improve patient outcomes and implant performance worldwide. |
724 | |||
| 42 |
ERGOMEDergomedcro.com
Global provider of specialized clinical trial management services in oncology, rare diseases, and complex trials for pharmaceutical and biotech sectors. |
720 | |||
| 43 |
Kyowa Kirin International plc.kyowakirininternational.com
Development and commercialization of innovative medicines in oncology, nephrology, and CNS therapies across Europe and the Middle East. |
701 | |||
| 44 |
CMR Surgicalcmrsurgical.com
Global medical devices company innovating surgery with Versius robotic system to make minimal access surgery accessible and affordable, redefining surgical robotics market Visit website to learn more |
664 | |||
| 45 |
Salix Pharmaceuticalssalix.com
Specialty pharmaceutical company focused on preventing and treating gastrointestinal diseases, offering effective solutions, connecting with patients and healthcare professionals, and driving innovation |
651 | |||
| 46 |
Raynerrayner.com
Manufacturing and distributing intraocular lenses for cataract surgery with global production facilities and offices in over 80 countries. |
650 | |||
| 47 |
Sygnature Discoverysygnaturediscovery.com
Integrated drug discovery contract research organization providing services from target identification to candidate nomination across multiple therapeutic areas globally. |
640 | |||
| 48 |
Clinigenclinigengroup.com
specialist pharmaceutical services and products platform providing ethical access to medicines, supporting drug development and patient access worldwide |
633 | |||
| 49 |
Sinclairsinclair.com
global medical aesthetics company providing innovative products and tools to empower clinicians, supporting practice growth and holistic patient care worldwide |
613 | |||
| 50 |
Veramedveramed.co.uk
A customer-focused Clinical Research Organisation offering high-quality biostatistics and programming services for the pharmaceutical industry, with a focus on innovation and service excellence |
609 | |||
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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 the United Kingdom
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- Financial services firms in the United Kingdom 3,711
- Financial Services companies in the United Kingdom 3,696
- Retail chains in the United Kingdom 3,289
- Professional services firms in the United Kingdom 2,706
- Software Development companies in the United Kingdom 2,600
- Manufacturers in the United Kingdom 2,159
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- E-commerce companies in the United Kingdom 1,246
- Hardware manufacturers in the United Kingdom 1,239
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- Hospitality companies in the United Kingdom 1,204
- Critical infrastructure operators in the United Kingdom 1,195
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- Retail Apparel and Fashion companies in the United Kingdom 1,085
- Subscription businesses in the United Kingdom 1,077
- Distributors and wholesalers in the United Kingdom 1,060