# List of pharmaceutical companies in the United Kingdom

Tamtam tracks 235 pharmaceutical companies headquartered in the United Kingdom. This list ranks the 50 largest by number of employees on LinkedIn, led by GSK, AstraZeneca and Reckitt. Their median headcount is 1,069. Half of them were founded in 1992 or later. The most common headquarters are London (16), Cambridge (3) and Guildford (2).

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.

🇬🇧 United Kingdom · 50 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [GSK](https://www.tamtam.ai/c/gsk) (gsk.com)<br>Uniting science, technology, and talent to advance healthcare and disease prevention through collaborative innovation and community engagement. | Pharmaceutical Manufacturing | 🇬🇧 London | 92,092 |  |
| 2 | [AstraZeneca](https://www.tamtam.ai/c/astrazeneca) (astrazeneca.com)<br>Pioneering healthcare transformation through the potential of science, impacting individuals, society, and the environment for a healthier future | Pharmaceutical Manufacturing | 🇬🇧 Cambridge | 79,513 |  |
| 3 | [Reckitt](https://www.tamtam.ai/c/reckitt) (reckitt.com)<br>Focus on providing high-quality hygiene, wellness, and nourishment products, aiming for global access and sustainable growth for healthier communities. | Manufacturing | 🇬🇧 Slough | 43,000 |  |
| 4 | [Smith+Nephew](https://www.tamtam.ai/c/smith-nephew) (smith-nephew.com)<br>Design and manufacture medical technologies supporting healthcare professionals to restore patient health and mobility, enhancing performance and quality of life. | Medical Equipment Manufacturing | 🇬🇧 Watford | 19,222 | 1856 |
| 5 | [Haleon](https://www.tamtam.ai/c/haleon) (haleon.com)<br>The company is focused on improving everyday health through a human-centered approach They promote community guidelines for social media interactions #HelloHaleon | Consumer Services | 🇬🇧 London | 18,581 | 2022 |
| 6 | [Hikma Pharmaceuticals](https://www.tamtam.ai/c/hikma-pharmaceuticals) (hikma.com)<br>Manufacturing and supplying over 800 generic, specialty, and branded pharmaceutical products to hospitals, physicians, and pharmacists globally. | Pharmaceutical Manufacturing | 🇬🇧 London | 10,626 | 1978 |
| 7 | [Convatec](https://www.tamtam.ai/c/convatec) (convatecgroup.com)<br>Delivering pioneering and trusted medical solutions focused on improving the lives of patients and healthcare providers worldwide. | Medical Equipment Manufacturing | 🇬🇧 London | 6,954 | 1978 |
| 8 | [Hillrom](https://www.tamtam.ai/c/hillrom) (hillrom.com)<br>A global medtech leader committed to saving and sustaining lives, redefining healthcare through compassion, innovation, and meaningful change | Medical Equipment Manufacturing | 🇬🇧 Chicago | 5,300 | 1929 |
| 9 | [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 |
| 10 | [LivaNova](https://www.tamtam.ai/c/livanova) (livanova.com)<br>Global medical technology company with advanced technologies and breakthrough treatments focused on improving patient lives worldwide in cardiopulmonary and neuromodulation | Medical Equipment Manufacturing | 🇬🇧 London | 3,545 |  |
| 11 | [Orion Pharma](https://www.tamtam.ai/c/orion-pharma) (orionpharma.com)<br>Development manufacturing marketing of human and veterinary pharmaceuticals focusing on oncology, pain, neurological and respiratory diseases treatments. | Pharmaceutical Manufacturing | 🇬🇧 Espoo | 3,167 |  |
| 12 | [LGC](https://www.tamtam.ai/c/lgc) (lgcgroup.com)<br>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 | Biotechnology Research | 🇬🇧 London | 2,500 |  |
| 13 | [Mundipharma](https://www.tamtam.ai/c/mundipharma) (mundipharma.com)<br>A global healthcare company dedicated to bringing innovative treatments to patients in Pain Management, Infectious Disease, Consumer Healthcare, and other disease areas | Pharmaceutical Manufacturing | 🇬🇧 | 2,071 | 1952 |
| 14 | [Accord Healthcare](https://www.tamtam.ai/c/accord-healthcare) (accord-healthcare.com)<br>Development, manufacturing, and distribution of affordable medicines across over 85 countries, focusing on patient access and healthcare improvement. | Pharmaceutical Manufacturing | 🇬🇧 London | 2,038 |  |
| 15 | [ViiV Healthcare](https://www.tamtam.ai/c/viiv-healthcare) (viivhealthcare.com)<br>A global HIV specialist company focused on researching new medicines and improving access to care for people living with HIV | Pharmaceutical Manufacturing | 🇬🇧 London | 1,960 | 2009 |
| 16 | [Dechra](https://www.tamtam.ai/c/dechra) (dechra.com)<br>Development, manufacture, and sales of high-quality veterinary pharmaceuticals and related products supporting veterinarians worldwide with training and information. | Pharmaceutical Manufacturing | 🇬🇧 Northwich | 1,902 | 1997 |
| 17 | [Abcam](https://www.tamtam.ai/c/abcam) (abcam.com)<br>Innovative company providing essential products and solutions for scientists worldwide to drive research in areas like cancer and neurological disorders | Biotechnology Research | 🇬🇧 Cambridge | 1,880 |  |
| 18 | [Endo](https://www.tamtam.ai/c/endo) (endo.com)<br>Develops and delivers specialty pharmaceutical products focused on improving quality of life through innovative therapies and community partnerships worldwide. | Pharmaceutical Manufacturing | 🇬🇧 Malvern | 1,482 | 1997 |
| 19 | [Necsa](https://www.tamtam.ai/c/necsa) (necsa.co.za)<br>The company's focus is on administering nuclear energy matters in South Africa, covering safety, technology, and non-proliferation to facilitate industry leadership | Research Services | 🇬🇧 Brits Magisterial District | 1,384 |  |
| 20 | [PrimeVigilance](https://www.tamtam.ai/c/primevigilance) (primevigilance.com)<br>Leading Pharmacovigilance specialist delivering global solutions for clinical and post-marketing safety, medical information, regulatory support, and quality management services worldwide | Biotechnology Research | 🇬🇧 Guildford | 1,365 | 2008 |
| 21 | [Oxford Nanopore Technologies](https://www.tamtam.ai/c/oxford-nanopore-technologies) (nanoporetech.com)<br>Innovative biotech company developing portable DNA and RNA sequencing technology for real-time data delivery and scalable analysis in over 100 countries worldwide | Biotechnology Research | 🇬🇧 Oxford | 1,352 |  |
| 22 | [ABF Ingredients](https://www.tamtam.ai/c/abf-ingredients) (abfingredients.com)<br>Development and production of specialty ingredients for food, health, pharmaceutical, animal health, and various industrial applications worldwide. | Food and Beverage Services | 🇬🇧 Peterborough | 1,177 | 2003 |
| 23 | [Alloga](https://www.tamtam.ai/c/alloga) (cencora.com)<br>An international healthcare supply chain network providing warehousing, distribution, contract management, packaging, labelling, and support solutions for the industry | Pharmaceutical Manufacturing | 🇬🇧 Weybridge | 1,135 | 1996 |
| 24 | [Randox](https://www.tamtam.ai/c/randox) (randox.com)<br>An international health diagnostics company offering a range of products including Biochip Array Technology, clinical chemistry analyzers, reagents, software, and biosciences portfolio | Hospitals and Health Care | 🇬🇧 Crumlin | 1,100 | 1982 |
| 25 | [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 |
| 26 | [NextPharma](https://www.tamtam.ai/c/nextpharma) (nextpharma.com)<br>NextPharma is a leading European CDMO partner offering fast, flexible, and personalized solutions for pharmaceutical development and manufacturing in various industries | Pharmaceutical Manufacturing | 🇬🇧 London | 977 | 1946 |
| 27 | [APCER Life Sciences](https://www.tamtam.ai/c/apcer-life-sciences) (apcerls.com)<br>Global provider of drug safety, pharmacovigilance, regulatory services, and risk management programs for pharmaceutical companies worldwide, with expertise in medical writing and quality assurance | Business Consulting and Services | 🇬🇧 London | 943 | 2007 |
| 28 | [OXB](https://www.tamtam.ai/c/oxb) (oxb.com)<br>A viral vector CDMO with 25+ years of experience in gene therapies, enabling clients to deliver life-changing treatments globally | Pharmaceutical Manufacturing | 🇬🇧 Oxford | 940 | 1995 |
| 29 | [Qinecsa Solutions](https://www.tamtam.ai/c/qinecsa-solutions) (qinecsa.com)<br>A global life science partner offering industry-leading pharmacovigilance technology and expert scientific solutions to efficiently manage drug safety data | Pharmaceutical Manufacturing | 🇬🇧 London | 936 | 2006 |
| 30 | [Sterling Pharma Solutions](https://www.tamtam.ai/c/sterling-pharma-solutions) (sterlingpharmasolutions.com)<br>A global organization with 50+ years of experience providing API development and manufacturing services to the pharmaceutical industry, specializing in complex chemistries | Pharmaceutical Manufacturing | 🇬🇧 Dudley | 908 | 1969 |
| 31 | [Eisai EMEA](https://www.tamtam.ai/c/eisai-emea) (eisai.eu)<br>development of innovative medicines addressing high unmet medical needs in oncology and neurology with patient-centered healthcare philosophy | Pharmaceutical Manufacturing | 🇬🇧 Hatfield | 895 |  |
| 32 | [Alliance Medical UK](https://www.tamtam.ai/c/alliance-medical-uk) (alliancemedical.co.uk)<br>Europe's top independent imaging services provider improving imaging processes and patient outcomes for over 20 years with expertise and knowledge | Hospitals and Health Care | 🇬🇧 Warwick | 857 | 1988 |
| 33 | [Healthcare at Home](https://www.tamtam.ai/c/healthcare-at-home) (sciensus.com)<br>A leading healthcare provider delivering clinical care and medication services to patients in their homes across the UK and Europe | Hospitals and Health Care | 🇬🇧 Burton Upon Trent | 834 | 1992 |
| 34 | [Advanced Medical Solutions](https://www.tamtam.ai/c/advanced-medical-solutions) (admedsol.com)<br>Specializing in advanced wound care and closure products, this UK-based company provides innovative and technologically advanced solutions through design, development, and manufacturing services | Medical Equipment Manufacturing | 🇬🇧 Winsford | 830 |  |
| 35 | [Terumo Aortic](https://www.tamtam.ai/c/terumo-aortic) (terumoaortic.com)<br>Partnering with customers to provide innovative, versatile, and precise aortic care solutions, including implantable devices and digital technologies. | Medical Equipment Manufacturing | 🇬🇧 Inchinnan | 812 | 1982 |
| 36 | [Quotient Sciences](https://www.tamtam.ai/c/quotient-sciences) (quotientsciences.com)<br>A drug development and manufacturing accelerator offering integrated programs and tailored services to get drugs to patients faster and more efficiently | Pharmaceutical Manufacturing | 🇬🇧 Nottingham | 811 |  |
| 37 | [Optos](https://www.tamtam.ai/c/optos) (optos.com)<br>Revolutionizing retinal imaging with patient-friendly devices capturing ultra-widefield images for early detection and treatment of eye disorders worldwide | Medical Equipment Manufacturing | 🇬🇧 Dunfermline | 803 | 1992 |
| 38 | [Intersurgical](https://www.tamtam.ai/c/intersurgical) (intersurgical.com)<br>Global designer, manufacturer, and supplier of high-quality medical devices for respiratory care, offering solutions for airway management, anaesthesia, critical care, and oxygen therapy | Medical Equipment Manufacturing | 🇬🇧 Wokingham | 790 | 1982 |
| 39 | [Autolus Therapeutics](https://www.tamtam.ai/c/autolus-therapeutics) (autolus.com)<br>Clinical-stage biopharmaceutical company developing next-generation T cell therapies for cancer treatment by engineering targeted and active therapies to eliminate cancer cells | Biotechnology Research | 🇬🇧 London | 755 | 2014 |
| 40 | [ADVANZ PHARMA](https://www.tamtam.ai/c/advanz-pharma) (advanzpharma.com)<br>Global pharmaceutical company providing specialty, hospital, and rare disease medicines through partnerships and direct commercial presence worldwide. | Pharmaceutical Manufacturing | 🇬🇧 London | 734 |  |
| 41 | [Corin Group](https://www.tamtam.ai/c/corin-group) (coringroup.com)<br>Development and provision of advanced orthopaedic products and services designed to improve patient outcomes and implant performance worldwide. | Medical Equipment Manufacturing | 🇬🇧 Cirencester | 724 | 1985 |
| 42 | [ERGOMED](https://www.tamtam.ai/c/ergomed) (ergomedcro.com)<br>Global provider of specialized clinical trial management services in oncology, rare diseases, and complex trials for pharmaceutical and biotech sectors. | Biotechnology Research | 🇬🇧 Guildford | 720 | 1997 |
| 43 | [Kyowa Kirin International plc.](https://www.tamtam.ai/c/kyowa-kirin-international-plc) (kyowakirininternational.com)<br>Development and commercialization of innovative medicines in oncology, nephrology, and CNS therapies across Europe and the Middle East. | Pharmaceutical Manufacturing | 🇬🇧 Galashiels | 701 | 1995 |
| 44 | [CMR Surgical](https://www.tamtam.ai/c/cmr-surgical) (cmrsurgical.com)<br>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 | Medical Equipment Manufacturing | 🇬🇧 Cambridge | 664 | 2014 |
| 45 | [Salix Pharmaceuticals](https://www.tamtam.ai/c/salix-pharmaceuticals) (salix.com)<br>Specialty pharmaceutical company focused on preventing and treating gastrointestinal diseases, offering effective solutions, connecting with patients and healthcare professionals, and driving innovation | Pharmaceutical Manufacturing | 🇬🇧 Bridgewater | 651 | 1988 |
| 46 | [Rayner](https://www.tamtam.ai/c/rayner) (rayner.com)<br>Manufacturing and distributing intraocular lenses for cataract surgery with global production facilities and offices in over 80 countries. | Medical Equipment Manufacturing | 🇬🇧 Worthing | 650 | 1910 |
| 47 | [Sygnature Discovery](https://www.tamtam.ai/c/sygnature-discovery) (sygnaturediscovery.com)<br>Integrated drug discovery contract research organization providing services from target identification to candidate nomination across multiple therapeutic areas globally. | Biotechnology Research | 🇬🇧 Nottingham | 640 | 2004 |
| 48 | [Clinigen](https://www.tamtam.ai/c/clinigen) (clinigengroup.com)<br>specialist pharmaceutical services and products platform providing ethical access to medicines, supporting drug development and patient access worldwide | Professional Services | 🇬🇧 London | 633 | 2010 |
| 49 | [Sinclair](https://www.tamtam.ai/c/sinclair) (sinclair.com)<br>global medical aesthetics company providing innovative products and tools to empower clinicians, supporting practice growth and holistic patient care worldwide | Pharmaceutical Manufacturing | 🇬🇧 London | 613 | 1971 |
| 50 | [Veramed](https://www.tamtam.ai/c/veramed) (veramed.co.uk)<br>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 | Research Services | 🇬🇧 London | 609 | 2012 |

## 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 the United Kingdom

- [The largest companies in the United Kingdom](https://www.tamtam.ai/l/largest-companies-united-kingdom) (36,548)
- [Multinational companies in the United Kingdom](https://www.tamtam.ai/l/multinational-companies-united-kingdom) (7,458)
- [Financial services firms in the United Kingdom](https://www.tamtam.ai/l/financial-services-firms-united-kingdom) (3,711)
- [Financial Services companies in the United Kingdom](https://www.tamtam.ai/l/financial-services-companies-united-kingdom) (3,696)
- [Retail chains in the United Kingdom](https://www.tamtam.ai/l/retail-chains-united-kingdom) (3,289)
- [Professional services firms in the United Kingdom](https://www.tamtam.ai/l/professional-services-firms-united-kingdom) (2,706)
- [Software Development companies in the United Kingdom](https://www.tamtam.ai/l/software-development-companies-united-kingdom) (2,600)
- [Manufacturers in the United Kingdom](https://www.tamtam.ai/l/manufacturers-united-kingdom) (2,159)
- [Companies with in-house R&D in the United Kingdom](https://www.tamtam.ai/l/r-and-d-companies-united-kingdom) (1,930)
- [IT Services and IT Consulting companies in the United Kingdom](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-united-kingdom) (1,722)
- [Retail companies in the United Kingdom](https://www.tamtam.ai/l/retail-companies-united-kingdom) (1,596)
- [IT services companies in the United Kingdom](https://www.tamtam.ai/l/it-services-companies-united-kingdom) (1,583)
- [Hotel and hospitality groups in the United Kingdom](https://www.tamtam.ai/l/hospitality-groups-united-kingdom) (1,461)
- [Companies with a mobile app in the United Kingdom](https://www.tamtam.ai/l/companies-with-mobile-app-united-kingdom) (1,411)
- [Consulting firms in the United Kingdom](https://www.tamtam.ai/l/consulting-firms-united-kingdom) (1,298)
- [E-commerce companies in the United Kingdom](https://www.tamtam.ai/l/ecommerce-companies-united-kingdom) (1,246)
- [Hardware manufacturers in the United Kingdom](https://www.tamtam.ai/l/hardware-companies-united-kingdom) (1,239)
- [Family-owned companies in the United Kingdom](https://www.tamtam.ai/l/family-owned-companies-united-kingdom) (1,224)
- [Hospitality companies in the United Kingdom](https://www.tamtam.ai/l/hospitality-companies-united-kingdom) (1,204)
- [Critical infrastructure operators in the United Kingdom](https://www.tamtam.ai/l/critical-infrastructure-operators-united-kingdom) (1,195)
- [Wellness and Fitness Services companies in the United Kingdom](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-united-kingdom) (1,151)
- [Retail Apparel and Fashion companies in the United Kingdom](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-united-kingdom) (1,085)
- [Subscription businesses in the United Kingdom](https://www.tamtam.ai/l/subscription-businesses-united-kingdom) (1,077)
- [Distributors and wholesalers in the United Kingdom](https://www.tamtam.ai/l/distributors-and-wholesalers-united-kingdom) (1,060)

## The same list elsewhere in United Kingdom

- [Pharmaceutical companies in England](https://www.tamtam.ai/l/pharmaceutical-companies-england) (198)
- [Pharmaceutical companies in London](https://www.tamtam.ai/l/pharmaceutical-companies-london) (41)

## The same list elsewhere

- [Pharmaceutical companies in the world](https://www.tamtam.ai/l/pharmaceutical-companies-in-the-world) (5,664)
- [Pharmaceutical companies in Europe](https://www.tamtam.ai/l/pharmaceutical-companies-in-europe) (3,019)

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Source: https://www.tamtam.ai/l/pharmaceutical-companies-united-kingdom