# Top 100 companies with in-house R&D in England

Tamtam tracks 1,703 companies with in-house R&D headquartered in England. This list ranks the 100 largest by number of employees on LinkedIn, led by Shell, Unilever and Vodafone. Their median headcount is 11,769. Half of them were founded in 1946 or later. The most common headquarters are London (53), Cambridge (5) and Birmingham (3).

These large companies with in-house R&D in England are primarily major players in the energy, telecommunications, and pharmaceutical sectors. Many are headquartered in London, indicating a concentration of corporate research and development activities in the capital. The list includes global energy companies like Shell and bp, pharmaceutical giants such as GSK and AstraZeneca, and telecommunications providers like Vodafone and BT Group. Other notable companies are Unilever, a global consumer goods business, and Sainsbury's, a leading UK retailer.

A significant number of these companies were founded in the late 19th or early 20th century, including Unilever (1872), Sainsbury's (1869), and bp (1909), suggesting a long-standing tradition of industrial and scientific development. The presence of companies like Shell, bp, and Linde highlights a strong focus on industrial gases and energy transition initiatives.

🇬🇧 England · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Shell](https://www.tamtam.ai/c/shell) (shell.com)<br>A global energy company with a focus on cleaner energy solutions, serving millions of customers through retail service stations worldwide | Oil and Gas | 🇬🇧 London | 208,511 |  |
| 2 | [Unilever](https://www.tamtam.ai/c/unilever) (unilever.com)<br>Global purpose-led business, creating well-loved brands that improve lives worldwide Encourages innovation, fosters growth, and believes in business as a force for good | Manufacturing | 🇬🇧 Blackfriars | 145,051 | 1872 |
| 3 | [Vodafone](https://www.tamtam.ai/c/vodafone) (vodafone.com)<br>Using technology to connect people globally, drive social change, and improve lives while emphasizing the importance of humanity and collaboration | Telecommunications | 🇬🇧 London | 142,740 | 1982 |
| 4 | [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 |  |
| 5 | [bp](https://www.tamtam.ai/c/bp) (bp.com)<br>Investing in a balanced energy system by transitioning from oil and gas to lower-carbon energy, convenience stores, and power trading | Oil and Gas | 🇬🇧 London | 85,000 | 1909 |
| 6 | [Kingfisher plc](https://www.tamtam.ai/c/kingfisher-plc) (kingfisher.com)<br>International home improvement company with 1,900 stores across Europe Offering products and services for consumers and trade professionals to create better homes | Retail | 🇬🇧 London | 80,000 |  |
| 7 | [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 |  |
| 8 | [BT Group](https://www.tamtam.ai/c/bt-group) (bt.com)<br>A global communications services company connecting people through technology to address challenges like the pandemic, climate change, and cyber security | Telecommunications | 🇬🇧 London | 73,712 |  |
| 9 | [Sainsbury's](https://www.tamtam.ai/c/sainsbury-s) (sainsburys.jobs)<br>A leading UK retailer with over 1400 stores and a strong digital presence, offering affordable, greener products and convenient financial services to customers | Retail | 🇬🇧 London | 68,549 | 1869 |
| 10 | [Linde](https://www.tamtam.ai/c/linde) (linde.com)<br>Global industrial gases and engineering company providing high-quality solutions and services for various industries, supporting sustainability, decarbonization, and planet protection | Chemical Manufacturing | 🇬🇧 Woking | 66,000 | 1879 |
| 11 | [BAE Systems](https://www.tamtam.ai/c/bae-systems) (baesystems.com)<br>The company provides advanced technology-led defense, aerospace, and security solutions, with a skilled workforce in over 40 countries, focusing on innovation and long-term commitment | Defense and Space Manufacturing | 🇬🇧 London | 55,143 | 1999 |
| 12 | [FCA Fiat Chrysler Automobiles](https://www.tamtam.ai/c/fca-fiat-chrysler-automobiles) (stellantis.com)<br>A leading automaker and mobility provider now known as Stellantis, dedicated to creating innovative transportation solutions for the future | Motor Vehicle Manufacturing | 🇬🇧 London | 47,673 |  |
| 13 | [BAT](https://www.tamtam.ai/c/bat) (bat.com)<br>Global consumer goods company focused on transitioning adult smokers to scientifically substantiated reduced-risk smokeless alternatives across multiple international markets. | Manufacturing | 🇬🇧 London | 46,311 | 1902 |
| 14 | [JLR](https://www.tamtam.ai/c/jlr) (jlr.com)<br>A global company known for iconic vehicles, JLR offers exciting opportunities for growth with cutting-edge products and facilities worldwide | Motor Vehicle Manufacturing | 🇬🇧 Coventry | 43,815 | 1922 |
| 15 | [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 |  |
| 16 | [BBC](https://www.tamtam.ai/c/bbc) (bbc.co.uk)<br>Leading public service broadcaster, creates impartial, independent, distinctive, world-class programmes and content; informs, educates, entertains millions globally. | Broadcast Media Production and Distribution | 🇬🇧 London | 42,697 | 1922 |
| 17 | [WPP](https://www.tamtam.ai/c/wpp) (wpp.com)<br>Creative transformation company uses creativity to build better futures for people, planet, clients, and communities | Advertising Services | 🇬🇧 London | 41,040 |  |
| 18 | [Rio Tinto](https://www.tamtam.ai/c/rio-tinto) (riotinto.com)<br>Provides essential materials including iron ore, low carbon aluminum, copper, borates, and titanium for various global industries and daily life. | Mining | 🇬🇧 London | 40,794 | 1873 |
| 19 | [Diageo](https://www.tamtam.ai/c/diageo) (diageo.com)<br>Global leader in premium drinks, with over 200 brands sold in 180 countries Committed to sustainability, innovation, and excellence worldwide | Beverage Manufacturing | 🇬🇧 London | 34,137 |  |
| 20 | [Rolls-Royce](https://www.tamtam.ai/c/rolls-royce) (rolls-royce.com)<br>Engineering excellence driving critical technologies for air, sea, and land, powering, protecting, and connecting people worldwide. | Industrial Machinery Manufacturing | 🇬🇧 London | 31,649 |  |
| 21 | [Intertek](https://www.tamtam.ai/c/intertek-london) (intertek.com)<br>A global provider of Total Quality Assurance solutions, offering Testing, Inspection, Certification services to industries worldwide through a vast network of labs and offices | International Trade and Development | 🇬🇧 London | 31,152 | 1885 |
| 22 | [UK Ministry of Defence](https://www.tamtam.ai/c/uk-ministry-of-defence) (gov.uk)<br>The company works to protect the security and interests of the United Kingdom, providing necessary training, equipment, and support for the Armed Forces | Defense and Space Manufacturing | 🇬🇧 London | 30,901 |  |
| 23 | [CHANEL](https://www.tamtam.ai/c/chanel) (chanel.com)<br>A global leader in luxury product creation, CHANEL offers a wide range of high-end fashion, accessories, fragrances, skincare, and more | Retail Luxury Goods and Jewelry | 🇬🇧 London | 30,431 |  |
| 24 | [Nothing](https://www.tamtam.ai/c/nothing-london) (nothing.tech)<br>London-based tech company building smartphones and audio equipment with iconic design and intuitive engineering as an alternative to established industry giants. | Technology, Information and Internet | 🇬🇧 London | 29,964 | 2020 |
| 25 | [Imperial Brands PLC](https://www.tamtam.ai/c/imperial-brands-plc) (imperialbrandsplc.com)<br>An innovative global FMCG business with inclusive culture, focused on tobacco harm reduction, sustainability, and strong international brands | Manufacturing | 🇬🇧 Bristol | 29,000 |  |
| 26 | [Boots UK](https://www.tamtam.ai/c/boots-uk) (boots.jobs)<br>Leading UK pharmacy-led retailer offering health, beauty products & care services through retail stores, digital platforms, and exclusive brands for over 170 years | Retail | 🇬🇧 Nottingham | 27,869 | 1849 |
| 27 | [Arup](https://www.tamtam.ai/c/arup) (arup.com)<br>A global collective of designers and consultants dedicated to sustainable development, collaborating with clients to shape a better world using technology and imagination | Design Services | 🇬🇧 London | 26,193 | 1946 |
| 28 | [Next](https://www.tamtam.ai/c/next-leicester) (careers.next.co.uk)<br>Leading British retailer specializing in furniture production and technology development while fostering an innovative environment for warehouse teams and software engineering experts. | Retail | 🇬🇧 Leicester | 26,161 | 1982 |
| 29 | [TechnipFMC](https://www.tamtam.ai/c/technipfmc) (technipfmc.com)<br>A leading technology provider in the energy industry, offering integrated projects and services to develop energy resources while prioritizing sustainability | Oil and Gas | 🇬🇧 Newcastle upon Tyne | 25,875 |  |
| 30 | [LSEG](https://www.tamtam.ai/c/lseg) (lseg.com)<br>Provides financial indexing, benchmarking, analytic services, technology solutions, and integrated market infrastructure across data, capital markets, and post-trade. | Financial Services | 🇬🇧 London | 25,298 |  |
| 31 | [Kantar](https://www.tamtam.ai/c/kantar) (kantar.com)<br>Global leader in marketing data and analytics with deep expertise, innovative technology, and insights to help clients understand people and drive growth worldwide | Market Research | 🇬🇧 London | 24,976 |  |
| 32 | [UCL](https://www.tamtam.ai/c/ucl) (ucl.ac.uk)<br>Leading multidisciplinary university in London, promoting academic excellence, inclusive education, and impactful research addressing real-world challenges. | Research Services | 🇬🇧 London | 24,678 |  |
| 33 | [University of Cambridge](https://www.tamtam.ai/c/university-of-cambridge) (cam.ac.uk)<br>A leading research university with 31 Colleges and over 150 departments, faculties, and schools, focused on excellence in education and research | Research Services | 🇬🇧 Cambridge | 20,304 |  |
| 34 | [The University of Manchester](https://www.tamtam.ai/c/the-university-of-manchester) (manchester.ac.uk)<br>A prestigious university known for teaching excellence, research innovation, and a history of world firsts, with a large global alumni community | Higher Education | 🇬🇧 Manchester | 20,294 | 1824 |
| 35 | [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 |
| 36 | [Entain](https://www.tamtam.ai/c/entain) (entaingroup.com)<br>A global sports betting and gaming entertainment group with over 25 brands, focused on revolutionizing the industry and promoting diversity | Entertainment Providers | 🇬🇧 London | 18,906 |  |
| 37 | [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 |
| 38 | [Imperial College London](https://www.tamtam.ai/c/imperial-college-london) (imperial.ac.uk)<br>Leading university specializing in science, medicine, engineering, and business, fostering interdisciplinary collaboration to advance knowledge and improve health. | Research Services | 🇬🇧 London | 18,233 | 1907 |
| 39 | [National Grid](https://www.tamtam.ai/c/national-grid) (nationalgrid.com)<br>Operate and develop electricity transmission and distribution networks, natural gas systems, and invest in clean energy infrastructure and technology ventures. | Utilities | 🇬🇧 London | 17,432 |  |
| 40 | [Babcock International Group](https://www.tamtam.ai/c/babcock-international-group) (babcockinternational.com)<br>An international defence company providing product and service solutions to enhance customers' capabilities and assets, offering opportunities for professionals to grow | Defense and Space Manufacturing | 🇬🇧 London | 16,474 |  |
| 41 | [Sage](https://www.tamtam.ai/c/sage-newcastle-upon-tyne) (sage.com)<br>It provides businesses with user-friendly software and services, focusing on Payroll, HR, and Finance to enhance operational efficiency. | Software Development | 🇬🇧 Newcastle upon Tyne | 15,616 |  |
| 42 | [Hitachi Rail](https://www.tamtam.ai/c/hitachi-rail) (hitachirail.com)<br>Hitachi Rail provides innovative technology solutions for rail transportation, focusing on sustainability, digital transformation, and reducing carbon emissions globally | Rail Transportation | 🇬🇧 London | 15,527 |  |
| 43 | [Pearson](https://www.tamtam.ai/c/pearson-london) (pearson.com)<br>A global leader in learning, offering digital content, assessments, qualifications, and data to create vibrant and enriching learning experiences worldwide | Education | 🇬🇧 London | 13,596 |  |
| 44 | [Smollan](https://www.tamtam.ai/c/smollan) (smollan.com)<br>Partners with brands and retailers, building solutions that drive growth and create opportunities at the point of purchase. | Retail | 🇬🇧 London | 13,502 | 1931 |
| 45 | [DS Smith](https://www.tamtam.ai/c/ds-smith) (dssmith.com)<br>Innovative packaging solutions, paper products and recycling services using renewable resources to minimize environmental impact while optimizing supply chains for increased profitability. | Manufacturing | 🇬🇧 London | 13,157 |  |
| 46 | [Greencore](https://www.tamtam.ai/c/greencore) (greencore.com)<br>Leading UK convenience food manufacturer supplying supermarkets, retailers, and foodservice with a wide range of products Emphasizes quality, sustainability, and innovation | Food and Beverage Manufacturing | 🇬🇧 Barlborough | 13,000 | 1991 |
| 47 | [University of Nottingham](https://www.tamtam.ai/c/university-of-nottingham) (nottingham.ac.uk)<br>A pioneering university with campuses in the UK, China, and Malaysia that aims to transform the lives of its 45,000 students | Higher Education | 🇬🇧 Nottingham | 12,740 | 1948 |
| 48 | [Finastra](https://www.tamtam.ai/c/finastra) (finastra.com)<br>Focusing on OPEN Collaboration & Finance, Finastra provides innovative technology solutions for global financial services, promoting financial inclusion and diversity | Financial Services | 🇬🇧 Paddington | 12,499 | 2017 |
| 49 | [INEOS](https://www.tamtam.ai/c/ineos) (ineos.com)<br>Global manufacturer of raw materials and energy producer striving to reduce carbon emissions, create sustainable products, and improve living standards worldwide | Chemical Manufacturing | 🇬🇧 London | 12,070 | 1998 |
| 50 | [Wise](https://www.tamtam.ai/c/wise-london) (wise.com)<br>Platform enabling individuals and businesses to hold multiple currencies, transfer money internationally, and spend abroad with low fees. | Financial Services | 🇬🇧 London | 11,769 | 2011 |
| 51 | [Guy's and St Thomas'​ NHS Foundation Trust](https://www.tamtam.ai/c/guy-s-and-st-thomas-nhs-foundation-trust) (guysandstthomas.nhs.uk)<br>Provides high-quality healthcare services, clinical excellence, research, and community care through multiple hospitals and partnerships in London. | Hospitals and Health Care | 🇬🇧 London | 11,655 |  |
| 52 | [Arm](https://www.tamtam.ai/c/arm) (arm.com)<br>Designing foundational computing technology enabling advancements in cloud, automotive, IoT, metaverse, and autonomous systems worldwide. | Semiconductor Manufacturing | 🇬🇧 Cambridge | 11,505 |  |
| 53 | [The University of Sheffield](https://www.tamtam.ai/c/the-university-of-sheffield) (sheffield.ac.uk)<br>A leading Russell Group university with a diverse community of students and staff, advancing research, partnerships, and global impact in various industries | Higher Education | 🇬🇧 Sheffield | 11,417 | 1905 |
| 54 | [Clarivate](https://www.tamtam.ai/c/clarivate) (clarivate.com)<br>A global information services provider connecting people and organizations to trusted intelligence in Academia & Government, Life Sciences & Healthcare, and Intellectual Property | Information Services | 🇬🇧 London | 11,385 |  |
| 55 | [JCB](https://www.tamtam.ai/c/jcb) (linktr.ee)<br>A leading engineering and manufacturing company globally, producing a wide range of reliable and innovative construction machinery and equipment | Machinery Manufacturing | 🇬🇧 Rocester | 11,003 | 1945 |
| 56 | [Deliveroo](https://www.tamtam.ai/c/deliveroo) (deliveroo.co.uk)<br>A global food delivery service working with thousands of restaurants and riders to offer top-notch delivery experiences in multiple countries | Software Development | 🇬🇧 London | 10,910 | 2013 |
| 57 | [University of Liverpool](https://www.tamtam.ai/c/university-of-liverpool) (liverpool.ac.uk)<br>A renowned research and innovation center that attracts global students, experts, and partners, shaping lives and the world through collaborations | Higher Education | 🇬🇧 Liverpool | 10,897 |  |
| 58 | [University of Southampton](https://www.tamtam.ai/c/university-of-southampton) (southampton.ac.uk)<br>A prestigious university in southern England, ranked among the top 100 worldwide and a founding member of the Russell Group | Higher Education | 🇬🇧 Southampton | 10,786 | 1862 |
| 59 | [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 |
| 60 | [Newcastle University](https://www.tamtam.ai/c/newcastle-university) (ncl.ac.uk)<br>Research-intensive university, world-class reputation in medicine, science, engineering, social sciences, humanities; providing excellent research-led teaching for high graduate employment rates. | Higher Education | 🇬🇧 Newcastle upon Tyne | 10,332 |  |
| 61 | [University of Warwick](https://www.tamtam.ai/c/university-of-warwick) (warwick.ac.uk)<br>Leading university with high academic and research standards, consistently making a global impact through its students, alumni, and staff. | Higher Education | 🇬🇧 Coventry | 10,327 | 1965 |
| 62 | [Barclays UK](https://www.tamtam.ai/c/barclays-uk) (search.jobs.barclays)<br>A company focused on helping individuals progress in their lives through financial services, digital innovation, career guidance, and customer-centric approach | Banking | 🇬🇧 London | 9,925 | 1690 |
| 63 | [Google DeepMind](https://www.tamtam.ai/c/google-deepmind) (deepmind.google)<br>Advances artificial intelligence with breakthrough research. Solves complex problems like disease diagnosis, energy saving, and protein folding with safe, ethical AI. | Research Services | 🇬🇧 London | 9,665 | 2010 |
| 64 | [GKN Automotive](https://www.tamtam.ai/c/gkn-automotive) (gknautomotive.com)<br>Development and supply of advanced driveline systems and electric drive technologies powering millions of electrified vehicles worldwide. | Motor Vehicle Manufacturing | 🇬🇧 London | 8,992 | 1759 |
| 65 | [GKN Aerospace](https://www.tamtam.ai/c/gkn-aerospace) (gknaerospace.com)<br>Designs and manufactures advanced aerospace systems and components for commercial and defense aircraft, focusing on sustainability and innovation. | Aviation and Aerospace Component Manufacturing | 🇬🇧 Birmingham | 8,600 | 1759 |
| 66 | [River Island](https://www.tamtam.ai/c/river-island) (careers.riverisland.com)<br>Family-owned UK fashion brand with over 70 years on the high street, focusing on customer connection, innovation, wellbeing, and sustainability. | Retail | 🇬🇧 London | 8,600 | 1948 |
| 67 | [Johnson Matthey](https://www.tamtam.ai/c/johnson-matthey) (matthey.com)<br>development of sustainable technologies supporting energy, chemicals, and automotive sectors to decarbonise, reduce emissions, and enhance sustainability | Chemical Manufacturing | 🇬🇧 London | 8,592 | 1817 |
| 68 | [DNEG](https://www.tamtam.ai/c/dneg-fitzrovia) (dneg.com)<br>A global visual entertainment services company acclaimed for its award-winning visual effects work in feature films, television, and multiplatform content | Animation and Post-production | 🇬🇧 Fitzrovia | 8,179 | 1998 |
| 69 | [Pentair](https://www.tamtam.ai/c/pentair) (pentair.com)<br>This company provides sustainable water solutions for residential, business, and industrial use globally, focusing on improving lives and the environment | Industrial Machinery Manufacturing | 🇬🇧 London | 7,711 | 1966 |
| 70 | [IMI](https://www.tamtam.ai/c/imi-birmingham) (imiplc.com)<br>A global engineering company specializing in creating innovative solutions for fluid and motion control applications across various industries, focusing on collaboration and sustainability | Industrial Machinery Manufacturing | 🇬🇧 Birmingham | 7,637 |  |
| 71 | [AVEVA](https://www.tamtam.ai/c/aveva) (aveva.com)<br>It provides industrial software solutions that enhance collaboration, optimize operations, and drive sustainability for enterprises across various sectors globally. | Software Development | 🇬🇧 Cambridge | 7,630 |  |
| 72 | [Coventry University](https://www.tamtam.ai/c/coventry-university) (coventry.ac.uk)<br>A global university focused on creating better futures through innovative teaching, impactful research, and strong industry partnerships worldwide | Higher Education | 🇬🇧 Coventry | 7,430 | 1843 |
| 73 | [The Access Group](https://www.tamtam.ai/c/the-access-group) (theaccessgroup.com)<br>It provides business management software solutions for small and mid-sized organizations, enhancing productivity through innovative cloud and AI technologies. | Software Development | 🇬🇧 Loughborough | 7,368 |  |
| 74 | [Imperial College Healthcare NHS Trust](https://www.tamtam.ai/c/imperial-college-healthcare-nhs-trust) (imperial.nhs.uk)<br>Delivers acute and specialist medical care, conducts biomedical research, and provides clinical education for healthcare professionals across five London hospital sites. | Hospitals and Health Care | 🇬🇧 London | 7,248 | 1823 |
| 75 | [Manchester University NHS Foundation Trust](https://www.tamtam.ai/c/manchester-university-nhs-foundation-trust) (mft.nhs.uk)<br>A large UK acute Trust with nine hospitals providing comprehensive general to highly specialized services to 750,000 people in Manchester and Trafford | Hospitals and Health Care | 🇬🇧 Manchester | 7,150 |  |
| 76 | [Leeds Teaching Hospitals NHS Trust](https://www.tamtam.ai/c/leeds-teaching-hospitals-nhs-trust) (leedsth.nhs.uk)<br>One of Europe's largest acute hospital trusts in Leeds, providing healthcare, specialist services, training, research, and pioneering treatments with 20,000 employees | Hospitals and Health Care | 🇬🇧 Leeds | 6,812 | 1948 |
| 77 | [University of Bath](https://www.tamtam.ai/c/university-of-bath) (bath.ac.uk)<br>A leading UK research university dedicated to making a positive impact on the world through innovation, collaboration with industry, and quality education Located in Bath, UK | Higher Education | 🇬🇧 Bath | 6,784 | 1966 |
| 78 | [Clarks](https://www.tamtam.ai/c/clarks) (clarks.com)<br>A historic shoe company founded in 1825, known for innovative footwear designs that have evolved with fashion trends worldwide | Retail | 🇬🇧 Street | 6,739 | 1825 |
| 79 | [bet365](https://www.tamtam.ai/c/bet365) (bet365careers.com)<br>A global leader in online gambling, offering sports betting, in-play betting, live streaming, and a range of online casino games | Gambling Facilities and Casinos | 🇬🇧 Stoke-on-Trent | 6,713 | 2000 |
| 80 | [Sheffield Hallam University](https://www.tamtam.ai/c/sheffield-hallam-university) (shu.ac.uk)<br>Higher education institution focusing on student development, impactful research, and strong local and international partnerships for global solutions. | Higher Education | 🇬🇧 Sheffield | 6,692 | 1843 |
| 81 | [The University of Salford](https://www.tamtam.ai/c/the-university-of-salford) (salford.ac.uk)<br>Ambitious university with 20,000 students driving local economy and transforming individuals through teaching, research, innovation, and engagement in various fields | Higher Education | 🇬🇧 Salford | 5,864 | 1967 |
| 82 | [Element Materials Technology](https://www.tamtam.ai/c/element-materials-technology) (element.com)<br>Global provider of testing, inspection, and certification services ensuring product safety, regulatory compliance, and sustainability across advanced industrial supply chains. | Manufacturing | 🇬🇧 London | 5,829 | 2011 |
| 83 | [University of Plymouth](https://www.tamtam.ai/c/university-of-plymouth) (plymouth.ac.uk)<br>Modern university with dynamic culture, high student satisfaction, impactful research, innovation, and commitment to global societal and educational advancement. | Higher Education | 🇬🇧 Plymouth | 5,745 | 1862 |
| 84 | [University College London Hospitals NHS Foundation Trust](https://www.tamtam.ai/c/university-college-london-hospitals-nhs-foundation-trust) (uclh.nhs.uk)<br>Provides acute and specialist medical services across six London hospitals, focusing on patient care, education, and biomedical research. | Hospitals and Health Care | 🇬🇧 London | 5,737 |  |
| 85 | [Ocado Group](https://www.tamtam.ai/c/ocado-group) (ocadogroup.com)<br>Global technology company specializing in online grocery and logistics platforms, enabling partners to excel in ecommerce fulfillment and automation across various industries. | Software Development | 🇬🇧 Hatfield | 5,698 |  |
| 86 | [EV](https://www.tamtam.ai/c/ev) (evcam.com)<br>Specializing in well diagnosis, this company provides visual information to help operators understand and resolve wellbore issues, reducing risk and increasing operational performance | Energy Technology | 🇬🇧 Norwich | 5,696 | 2000 |
| 87 | [Davies](https://www.tamtam.ai/c/davies) (davies-group.com)<br>Specialist professional services and technology firm providing risk management, business process optimization, and digital transformation solutions to insurance, regulated, and global businesses | Insurance | 🇬🇧 London | 5,693 |  |
| 88 | [Anglia Ruskin University](https://www.tamtam.ai/c/anglia-ruskin-university) (aru.ac.uk)<br>Innovative global university with campuses in UK cities, offering top-ranked courses, industry partnerships, and world-leading research opportunities for students | Higher Education | 🇬🇧 Cambridge | 5,648 | 1858 |
| 89 | [ION](https://www.tamtam.ai/c/ion) (iongroup.com)<br>Innovative company providing trading and workflow automation software to financial institutions, corporations, and governments, empowering decision-making and accelerating processes | Software Development | 🇬🇧 London | 5,591 | 1998 |
| 90 | [University Hospitals Birmingham NHS Foundation Trust](https://www.tamtam.ai/c/university-hospitals-birmingham-nhs-foundation-trust) (uhb.nhs.uk)<br>Operates large teaching hospitals, providing comprehensive medical care, specialist treatments, and trauma services for millions regionally and internationally, with a focus on staff development. | Hospitals and Health Care | 🇬🇧 Birmingham | 5,525 |  |
| 91 | [QinetiQ](https://www.tamtam.ai/c/qinetiq) (qinetiq.com)<br>Integrated global defence and security company focused on mission-led innovation, testing technologies, and enabling customers to deploy enhanced capabilities for protecting lives. | Defense and Space Manufacturing | 🇬🇧 Farnborough | 5,512 |  |
| 92 | [University of Surrey](https://www.tamtam.ai/c/university-of-surrey) (surrey.ac.uk)<br>Provides diverse undergraduate courses, student support, clubs, and safe accommodation in a vibrant campus environment near London. | Higher Education | 🇬🇧 Guildford | 5,511 | 1891 |
| 93 | [Sophos](https://www.tamtam.ai/c/sophos) (sophos.com)<br>A global cybersecurity leader offering advanced solutions, managed services, and a broad portfolio of technologies to protect organizations from cyberattacks worldwide | Software Development | 🇬🇧 Abingdon | 5,498 | 1985 |
| 94 | [PA Consulting](https://www.tamtam.ai/c/pa-consulting) (paconsulting.com)<br>Global teams of strategists, technologists, and experts deliver innovative solutions across industries to drive transformation and lasting client success. | Business Consulting and Services | 🇬🇧 London | 5,470 |  |
| 95 | [University of Greenwich](https://www.tamtam.ai/c/university-of-greenwich) (gre.ac.uk)<br>A multi-faculty university in London and Kent offering high-quality teaching, research, and enterprise opportunities with a focus on student satisfaction | Higher Education | 🇬🇧 Greenwich | 5,450 | 1970 |
| 96 | [Cancer Research UK (CRUK)](https://www.tamtam.ai/c/cancer-research-uk-cruk) (cancerresearchuk.org)<br>Dedicated to cancer research, prevention, diagnosis, and treatment, funded by public donations to improve survival and quality of life. | Non-profit Organizations | 🇬🇧 London | 5,433 |  |
| 97 | [SS&C GlobeOp](https://www.tamtam.ai/c/ss-and-c-globeop) (ssctech.com)<br>Global provider of cloud-based fund services and technology for hedge funds, private equity, and asset managers, offering outsourcing support for operational efficiency and risk reduction | Financial Services | 🇬🇧 London | 5,416 | 2000 |
| 98 | [Octopus Energy](https://www.tamtam.ai/c/octopus-energy) (octopus.energy)<br>providing affordable, transparent renewable energy solutions with innovative technology and exceptional customer service across multiple countries and sectors | Utilities | 🇬🇧 London | 5,415 |  |
| 99 | [Oxford University Hospitals NHS Foundation Trust](https://www.tamtam.ai/c/oxford-university-hospitals-nhs-foundation-trust) (ouh.nhs.uk)<br>A world-renowned NHS teaching trust with four hospitals in Oxford, providing clinical services, specialist care, medical education, training, and research | Hospitals and Health Care | 🇬🇧 Oxford | 5,379 |  |
| 100 | [University of Sussex](https://www.tamtam.ai/c/university-of-sussex) (sussex.ac.uk)<br>University offering diverse, research-informed teaching and learning programs with a focus on creativity, intellectual challenge, and inclusivity. | Higher Education | 🇬🇧 Brighton | 5,299 | 1961 |

## 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](https://www.tamtam.ai/l/largest-companies-england) (32,641)
- [Retail chains in England](https://www.tamtam.ai/l/retail-chains-england) (2,917)
- [Manufacturers in England](https://www.tamtam.ai/l/manufacturers-england) (1,794)
- [Retail companies in England](https://www.tamtam.ai/l/retail-companies-england) (1,415)
- [Hotel and hospitality groups in England](https://www.tamtam.ai/l/hospitality-groups-england) (1,273)
- [Education providers in England](https://www.tamtam.ai/l/education-companies-england) (1,081)
- [Hardware manufacturers in England](https://www.tamtam.ai/l/hardware-companies-england) (1,067)
- [Wellness and Fitness Services companies in England](https://www.tamtam.ai/l/wellness-and-fitness-services-companies-england) (1,032)
- [Critical infrastructure operators in England](https://www.tamtam.ai/l/critical-infrastructure-operators-england) (1,029)
- [Hospitality companies in England](https://www.tamtam.ai/l/hospitality-companies-england) (1,025)
- [Family-owned companies in England](https://www.tamtam.ai/l/family-owned-companies-england) (1,014)
- [Distributors and wholesalers in England](https://www.tamtam.ai/l/distributors-and-wholesalers-england) (938)
- [Healthcare providers in England](https://www.tamtam.ai/l/healthcare-providers-england) (810)
- [Insurance companies in England](https://www.tamtam.ai/l/insurance-companies-england) (699)
- [Consumer goods companies in England](https://www.tamtam.ai/l/consumer-goods-companies-england) (671)
- [Construction companies in England](https://www.tamtam.ai/l/construction-companies-england) (667)
- [Hospitals and Health Care companies in England](https://www.tamtam.ai/l/hospitals-and-health-care-companies-england) (649)
- [Public sector organisations in England](https://www.tamtam.ai/l/public-sector-organisations-england) (638)
- [Food and beverage companies in England](https://www.tamtam.ai/l/food-and-beverage-companies-england) (635)
- [Food and Beverage Services companies in England](https://www.tamtam.ai/l/food-and-beverage-services-companies-england) (606)
- [Food and Beverage Manufacturing companies in England](https://www.tamtam.ai/l/food-and-beverage-manufacturing-companies-england) (582)
- [Corporate groups and holding companies in England](https://www.tamtam.ai/l/holding-companies-england) (578)
- [Restaurants companies in England](https://www.tamtam.ai/l/restaurants-companies-england) (506)
- [Energy companies in England](https://www.tamtam.ai/l/energy-companies-england) (500)

## The same list elsewhere in United Kingdom

- [Companies with in-house R&D in the United Kingdom](https://www.tamtam.ai/l/r-and-d-companies-united-kingdom) (1,930)
- [Companies with in-house R&D in Scotland](https://www.tamtam.ai/l/r-and-d-companies-scotland) (94)
- [Companies with in-house R&D in Wales](https://www.tamtam.ai/l/r-and-d-companies-wales) (38)
- [Companies with in-house R&D in Northern Ireland](https://www.tamtam.ai/l/r-and-d-companies-northern-ireland) (28)
- [Companies with in-house R&D in London](https://www.tamtam.ai/l/r-and-d-companies-london) (477)
- [Companies with in-house R&D in Cambridge](https://www.tamtam.ai/l/r-and-d-companies-cambridge) (56)
- [Companies with in-house R&D in Oxford](https://www.tamtam.ai/l/r-and-d-companies-oxford) (39)
- [Companies with in-house R&D in Manchester](https://www.tamtam.ai/l/r-and-d-companies-manchester) (34)
- [Companies with in-house R&D in Nottingham](https://www.tamtam.ai/l/r-and-d-companies-nottingham) (27)

## The same list elsewhere

- [Companies with in-house R&D in the world](https://www.tamtam.ai/l/r-and-d-companies-in-the-world) (34,346)
- [Companies with in-house R&D in Europe](https://www.tamtam.ai/l/r-and-d-companies-in-europe) (20,169)

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Source: https://www.tamtam.ai/l/r-and-d-companies-england