These Cambridge-based companies are primarily large organizations with significant R&D operations, spanning sectors such as pharmaceuticals, semiconductors, and software development. AstraZeneca, with over 79,000 employees, is a pharmaceutical manufacturer. Arm designs foundational computing technology, while AVEVA provides industrial software solutions. Darktrace develops AI cybersecurity platforms, and Jagex is known for its video game development.
A notable pattern among these companies is the strong representation of educational and healthcare institutions. The University of Cambridge and Anglia Ruskin University are prominent research and higher education bodies. Cambridge University Hospitals NHS Foundation Trust and Royal Papworth Hospital NHS Foundation Trust provide extensive healthcare services and are involved in biomedical research.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
AstraZenecaastrazeneca.com
Pioneering healthcare transformation through the potential of science, impacting individuals, society, and the environment for a healthier future |
79,513 | |||
| 2 |
University of Cambridgecam.ac.uk
A leading research university with 31 Colleges and over 150 departments, faculties, and schools, focused on excellence in education and research |
20,304 | |||
| 3 | 11,505 | ||||
| 4 | 7,630 | ||||
| 5 |
Anglia Ruskin Universityaru.ac.uk
Innovative global university with campuses in UK cities, offering top-ranked courses, industry partnerships, and world-leading research opportunities for students |
5,648 | |||
| 6 |
Cambridge University Hospitals NHS Foundation Trustcuh.nhs.uk
A leading healthcare provider delivering general, specialist, women's, and maternity care, known for biomedical research, academic health science, and innovative healthcare solutions |
5,288 | |||
| 7 |
Cambridge International Educationcambridgeinternational.org
The company partners with schools globally to provide an education framework from age 3 to 19, offering qualifications, resources, and support for student preparation |
2,665 | |||
| 8 |
Darktracedarktrace.com
AI cybersecurity platform learns unique data, detects threats, and intervenes against attacks, protecting organizations worldwide from cyber-threats. |
2,632 | |||
| 9 | 1,880 | ||||
| 10 | 1,796 | ||||
| 11 |
Royal Papworth Hospital NHS Foundation Trustroyalpapworth.nhs.uk
Specialist cardiothoracic hospital and main heart/lung transplant center providing high-quality patient care, research, education, and innovative treatments to patients in the UK |
1,344 | |||
| 12 |
Marshallmarshallgroup.com
Specializes in military aircraft maintenance, repair, overhaul, precision manufacturing, and bespoke mission conversions for global defense and aerospace clients. |
1,273 | |||
| 13 |
TWItwi-global.com
Global technology engineering leader offering research and consultancy services to members across various industries, specializing in structural integrity, materials testing, welding, and training |
930 | |||
| 14 |
Cambridge Consultantscambridgeconsultants.com
Specializes in radical science and engineering to create breakthrough technologies, products, and services that transform industries and society globally. |
805 | |||
| 15 |
Jagex: The RuneScape Companyjagex.com
A leading video game developer creating long-lasting, interactive games on various platforms, with a strong focus on community engagement and player empowerment |
718 | |||
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. | |||||
| 16 |
British Antarctic Surveybas.ac.uk
Researching Earth's frozen regions to understand and address the impact of rapid and unprecedented environmental changes on the planet and its inhabitants |
712 | |||
| 17 |
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 | |||
| 18 |
o2h discoveryo2hdiscovery.co
A pharmaceuticals company based in Ahmedabad, India that specializes in delivering discovery services for the healthcare industry |
561 | |||
| 19 |
Redgate Softwarered-gate.com
Specializes in database management software, supporting automation, secure scaling, and helping data professionals realize value and unlock growth through AI. |
559 | |||
| 20 |
Sepurasepura.com
Global leader in developing and supplying radio terminals, accessories, and applications for mission-critical and business-critical communications, with a focus on public safety and commercial markets |
491 | |||
| 21 |
Luminanceluminance.com
AI-powered legal technology automating contract generation, negotiation, and analysis with advanced tools like chatbot, risk identification, and process automation for legal teams worldwide |
466 | |||
| 22 |
Huawei Technologies Research & Development (UK) Ltd
The company is a global leader in technology innovation and research, with a focus on driving development in the global innovation value chain |
455 | |||
| 23 | 409 | ||||
| 24 |
Gearsetgearset.com
Gearset offers a comprehensive Salesforce DevOps platform for seamless deployment, automated testing, backups, and collaboration, enabling faster and higher-quality project delivery |
362 | |||
| 25 |
Hybrid Software Group PLChybridsoftware.com
A global leader in industrial printing solutions, developing innovative technologies for diverse applications such as food labelling, packaging, textiles, and 3-D printing |
358 | |||
| 26 | 331 | ||||
| 27 |
Pragmatic Semiconductorpragmaticsemi.com
Development and production of flexible, sustainable semiconductors designed to accelerate innovation and positively impact people and the planet. |
327 | |||
| 28 |
QUALCOMM TECHNOLOGIES INTERNATIONAL, LTD.qualcomm.com
Provider of cutting-edge technology solutions as part of a global group, specializing in advancing innovations in the field of QUALCOMM technologies |
240 | |||
| 29 |
Riverlaneriverlane.com
Develops quantum error correction tools and technology, fixing data errors on quantum computers, accelerating the quantum ecosystem by collaborating with manufacturers and research centers. |
207 | |||
| 30 |
Cambridge Design Partnershipcambridge-design.com
Innovative end-to-end partner for global brands and start-ups, creating breakthrough products and services through interdisciplinary collaboration and employee ownership |
204 | |||
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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 Cambridge
- The largest companies in Cambridge 271
- Multinational companies in Cambridge 67
- SaaS companies in Cambridge 57
- Software Development companies in Cambridge 55
The same list elsewhere in United Kingdom
- Companies with in-house R&D in the United Kingdom 1,930
- Companies with in-house R&D in England 1,703
- Companies with in-house R&D in Scotland 94
- Companies with in-house R&D in Wales 38
- Companies with in-house R&D in Northern Ireland 28
- Companies with in-house R&D in London 477
- Companies with in-house R&D in Oxford 39
- Companies with in-house R&D in Manchester 34
- Companies with in-house R&D in Nottingham 27