These English companies are primarily large research institutions, including universities and specialized scientific organizations. They focus on advancing knowledge across various fields, from medicine and engineering to artificial intelligence and botany. Many are well-established entities with significant workforces.
Key players include UCL, a multidisciplinary university promoting academic excellence and impactful research, and King's College London, a top-ranked university offering world-class education. Google DeepMind advances artificial intelligence with breakthrough research, while the Medical Research Council promotes world-class medical research to enhance human health. A notable pattern is the concentration of these large research bodies in London and Swindon.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 24,678 | ||||
| 2 |
King's College Londonkcl.ac.uk
Top-ranked university offering world-class education and research, fostering innovation and positive societal impact globally and locally. |
20,705 | |||
| 3 |
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 | |||
| 4 |
Imperial College Londonimperial.ac.uk
Leading university specializing in science, medicine, engineering, and business, fostering interdisciplinary collaboration to advance knowledge and improve health. |
18,233 | |||
| 5 |
Google DeepMinddeepmind.google
Advances artificial intelligence with breakthrough research. Solves complex problems like disease diagnosis, energy saving, and protein folding with safe, ethical AI. |
9,665 | |||
| 6 | 3,371 | ||||
| 7 |
Medical Research Councilukri.org
A publicly funded organization promoting world-class medical research to enhance human health across various institutions in the UK and Africa |
2,881 | |||
| 8 |
The Francis Crick Institutecrick.ac.uk
Multidisciplinary scientists conducting innovative biomedical research to understand human health and disease, fostering discovery and future science leaders. |
1,957 | |||
| 9 |
UK Atomic Energy Authoritygov.uk
The company is the UK's national fusion lab, leading the development of fusion power technology and positioning the UK as a leader in sustainable fusion energy |
1,773 | |||
| 10 |
The Institute of Cancer Researchicr.ac.uk
Leading cancer research organization and postgraduate college focused on cancer discoveries, treatment, and education with a hospital partnership. |
1,608 | |||
| 11 |
UK Research and Innovationukri.org
This organization invests Β£8 billion annually to support research and innovation, empowering individuals to drive prosperity, wellbeing, and societal benefits |
1,537 | |||
| 12 |
Wellcome Sanger Institutesanger.ac.uk
genomics research generating and analyzing large-scale genomic data to advance biological understanding and improve health outcomes worldwide |
1,484 | |||
| 13 |
Royal Botanic Gardens, Kewkew.org
A world-leading botanic gardens working to understand, value, and conserve plants and fungi through science, inspiring knowledge and conservation efforts |
1,384 | |||
| 14 |
ElevenLabselevenlabs.io
It develops AI audio models for speech and sound effects, enabling content creation, localization, and accessibility for various industries. |
1,291 | |||
| 15 |
Aurora Energy Researchauroraer.com
Provide power market forecasting, analytics, advisory support, and software solutions to support investment and financing decisions in energy sector. |
1,188 | |||
| 16 |
United Kingdom National Nuclear Laboratoryuknnl.com
National laboratory specializing in nuclear science focused on clean energy, health, environmental restoration, and security for societal benefit. |
1,095 | |||
| 17 |
MTC - Manufacturing Technology Centrethe-mtc.org
The company develops and proves innovative manufacturing processes and technologies, collaborates with industry and academia, offers training and conference facilities |
1,091 | |||
| 18 |
Institute of Physicsiop.org
The UK & Ireland's professional body and learned society for physics, promoting cooperation in physics worldwide |
910 | |||
| 19 |
Diamond Light Sourcediamond.ac.uk
National synchrotron science facility in the UK that accelerates electrons to generate brilliant beams of light used for research and development in various scientific disciplines |
817 | |||
| 20 |
National Centre for Social Researchnatcen.ac.uk
The National Centre for Social Research conducts independent, not-for-profit social research to give the public a voice in shaping impactful services |
798 | |||
| 21 |
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 | |||
| 22 |
Cochranecochrane.org
A global network providing high-quality research summaries to empower healthcare decision-making, free from commercial influence for over 30 years |
698 | |||
| 23 |
Institute of Psychiatry, Psychology & Neurosciencekcl.ac.uk
A leading research and education center in Europe for psychiatry, psychology, and neuroscience, focusing on understanding, preventing, and treating mental and neurological conditions |
676 | |||
| 24 |
AgResearchagresearch.co.nz
A leading agricultural science organization in New Zealand driving prosperity through innovative research and collaboration with stakeholders nationally and internationally |
674 | |||
| 25 |
National Oceanography Centrenoc.ac.uk
An independent organisation funded by UK Research and Innovation, working on National Capability programmes, managing marine equipment and research ships |
672 | |||
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 |
British Geological Surveybgs.ac.uk
A world-leading geoscience center providing objective data, information, and research for understanding the Earth's system and living with environmental change |
663 | |||
| 27 |
AMRCamrc.co.uk
A world-class research centre specializing in advanced manufacturing for aerospace and high-value sectors, bridging industry and academia for innovative solutions |
623 | |||
| 28 |
UK Centre for Ecology & Hydrology (UKCEH)ceh.ac.uk
An independent research institute providing environmental data and insights for creating a productive, resilient, and healthy environment where people and nature prosper |
617 | |||
| 29 |
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 | |||
| 30 | 590 | ||||
| 31 |
o2h discoveryo2hdiscovery.co
A pharmaceuticals company based in Ahmedabad, India that specializes in delivering discovery services for the healthcare industry |
561 | |||
| 32 |
The Alan Turing Instituteturing.ac.uk
A UK institute focusing on data science and artificial intelligence research, providing advice to policy makers, facilitating collaboration, and attracting global leaders |
549 | |||
| 33 | 541 | ||||
| 34 |
MRC Laboratory of Molecular Biology (LMB)www2.mrc-lmb.cam.ac.uk
World-leading research institute advancing understanding of biological processes at molecular level Pioneering techniques in protein structure, DNA sequencing, and antibody development for medical research and economic competitiveness |
537 | |||
| 35 |
Fujitsu Researchfujitsu.com
This company focuses on cutting-edge R&D to develop technologies that support society, prioritize data flow, and align with UN SDGs for sustainability |
505 | |||
| 36 |
John Innes Centrejic.ac.uk
International center of excellence in plant science and microbiology conducting innovative research to benefit agriculture, environment, human health, and engaging with policy makers and the public |
497 | |||
| 37 |
Berlin Institute of Technology (Technische UniversitΓ€t Berlin)media7.net
Leading technical university in Berlin, Germany, with a strong focus on research, teaching, and international partnerships, offering a wide range of academic disciplines and programs |
486 | |||
| 38 |
NCC β Innovating for Industrynccuk.com
The company is a UK-based innovation center focused on designing, manufacturing, and implementing sustainable composites through collaboration with universities and regional centers |
478 | |||
| 39 |
Insucoinsuco.com
Independent consulting firm specializing in tailored solutions for extractive, infrastructure, and institutional sectors, fostering sustainable partnerships and impactful change globally |
476 | |||
| 40 |
The Pirbright Institutepirbright.ac.uk
A leading research institute focusing on virus diseases in farm animals and zoonotic viruses, contributing to global food security and health |
440 | |||
| 41 |
Institute of Development Studiesids.ac.uk
This company conducts world-class research and partnerships to promote equitable and sustainable development globally, leading to impactful social, political, and economic change |
435 | |||
| 42 |
Legal 500legalease.dev
A leading publisher of legal market information, offering authoritative analysis and commentary through directories, magazines, journals, textbooks, and online resources since 1987 |
428 | |||
| 43 |
IBweareib.co
A behavioural strategy agency, using psychology to uncover reasons for customer and employee behavior, providing deep insights for business growth |
426 | |||
| 44 | 409 | ||||
| 45 |
Rothamsted Researchrothamsted.ac.uk
Agricultural research institution providing innovative solutions for sustainable food and energy production through world-class science and knowledge-driven practices |
407 | |||
| 46 |
IGD (Institute of Grocery Distribution)igd.com
A trusted partner in the food and consumer goods industry, providing unrivaled insight to help customers unlock success and drive positive change |
406 | |||
| 47 | 405 | ||||
| 48 |
The British Academythebritishacademy.ac.uk
Mobilizes humanities and social sciences to understand global challenges, invests in researchers, engages public with fresh thinking, and influences policy for everyone's benefit. |
399 | |||
| 49 |
Ellison Institute of Technology Oxfordeit.org
Cutting-edge research and development facility focusing on solving humanity's challenges through technology in healthcare, agriculture, energy, and policy |
395 | |||
| 50 |
TTP Groupttpgroup.com
A group of technology-focused businesses developing breakthrough products, applying innovations, and creating new technologies to help companies thrive |
394 | |||
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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.
More company lists in England
- The largest companies in England 32,641
- Retail chains in England 2,917
- Manufacturers in England 1,794
- Companies with in-house R&D in England 1,703
- Retail companies in England 1,415
- Hotel and hospitality groups in England 1,273
- Education providers in England 1,081
- Hardware manufacturers in England 1,067
- Wellness and Fitness Services companies in England 1,032
- Critical infrastructure operators in England 1,029
- Hospitality companies in England 1,025
- Family-owned companies in England 1,014
- Distributors and wholesalers in England 938
- Healthcare providers in England 810
- Insurance companies in England 699
- Consumer goods companies in England 671
- Construction companies in England 667
- Hospitals and Health Care companies in England 649
- Public sector organisations in England 638
- Food and beverage companies in England 635
- Food and Beverage Services companies in England 606
- Food and Beverage Manufacturing companies in England 582
- Corporate groups and holding companies in England 578
- Restaurants companies in England 506