# 100 leading multinational companies in the United Kingdom

Tamtam tracks 7,458 multinational companies headquartered in the United Kingdom. This list ranks the 100 largest by number of employees on LinkedIn, led by EY, Shell and HSBC. Their median headcount is 26,768. The most common headquarters are London (59), Cambridge (2) and Edinburgh (2).

This selection of large multinational companies in the United Kingdom primarily features global players in financial services, such as HSBC, a global financial services organization with a network spanning 63 countries, and Barclays, a British universal bank with a global presence. It also includes major professional services firms like EY, which provides assurance, consulting, and tax services, and key manufacturing and retail companies like Unilever, a global purpose-led business creating well-loved brands, and Tesco, a global retailer offering food and fashion. Other notable companies are Shell in oil and gas, Vodafone in telecommunications, and GSK in pharmaceutical manufacturing.

A significant pattern among these companies is their large employee base, all exceeding 79,000 employees, with EY at over 400,000, indicating a focus on established, large-scale enterprises. Furthermore, a strong concentration of headquarters is observed in London, which hosts many of these global entities.

🇬🇧 United Kingdom · 100 companies · Updated Nov 11, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [EY](https://www.tamtam.ai/c/ey) (ey.com)<br>A global organization with diverse teams in over 150 countries provides assurance, consulting, law, strategy, tax, and transactions to help clients grow and transform | Professional Services | 🇬🇧 London | 404,207 |  |
| 2 | [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 |  |
| 3 | [HSBC](https://www.tamtam.ai/c/hsbc) (hsbc.com)<br>A global financial services organization with a network spanning 63 countries, serving individuals, companies, and governments, creating opportunities for customers worldwide | Financial Services | 🇬🇧 London | 197,879 |  |
| 4 | [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 |
| 5 | [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 |
| 6 | [FUJITSU](https://www.tamtam.ai/c/fujitsu) (global.fujitsu)<br>Leading global information and communication technology company, offering technology products, solutions, and services, connecting people, technology, and ideas for a sustainable world. | IT Services and IT Consulting | 🇬🇧 | 124,000 | 1935 |
| 7 | [G4S](https://www.tamtam.ai/c/g4s) (g4s.com)<br>A leading security and facility services company providing proactive security services, cutting-edge technology, and integrated solutions to help clients focus on their core business | Security and Investigations | 🇬🇧 London | 116,486 | 1901 |
| 8 | [Aon](https://www.tamtam.ai/c/aon) (aon.com)<br>The company provides advice and solutions to clients worldwide, helping them make better decisions to protect and grow their business | Financial Services | 🇬🇧 London | 93,574 |  |
| 9 | [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 |  |
| 10 | [Tesco](https://www.tamtam.ai/c/tesco) (tescoplc.com)<br>Global retailer offering food and fashion through physical stores and online platforms, employing hundreds of thousands across offices, distribution and engagement centers. | Retail | 🇬🇧 Welwyn Garden City | 91,023 |  |
| 11 | [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 |
| 12 | [Barclays](https://www.tamtam.ai/c/barclays) (home.barclays)<br>A British universal bank with global presence, offering consumer banking, payments, corporate and investment banking services, supported by technology and operational solutions | Financial Services | 🇬🇧 London | 82,417 |  |
| 13 | [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 |  |
| 14 | [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 |  |
| 15 | [Standard Chartered](https://www.tamtam.ai/c/standard-chartered) (sc.com)<br>An international banking group with a presence in 53 markets, driving commerce and prosperity through diversity and values Listed on London and Hong Kong Stock Exchanges | Banking | 🇬🇧 London | 79,401 |  |
| 16 | [Avon](https://www.tamtam.ai/c/avon-northampton) (avonworldwide.com)<br>A pioneering beauty brand focused on empowering women worldwide, offering innovative products and advocating for gender equality and women's health | Personal Care Product Manufacturing | 🇬🇧 Northampton | 75,208 |  |
| 17 | [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 |  |
| 18 | [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 |
| 19 | [Compass Group](https://www.tamtam.ai/c/compass-group-amble) (compass-group.com)<br>Provides contract food and support services globally, aiming for world-class standards through great people, service, and results, generating significant revenue. | Food and Beverage Services | 🇬🇧 Chertsey | 61,555 | 1941 |
| 20 | [Lloyds Banking Group](https://www.tamtam.ai/c/lloyds-banking-group) (lloydsbankinggroup.com)<br>This company focuses on creating a more sustainable and inclusive future in the financial services industry, while supporting customers' changing needs | Financial Services | 🇬🇧 London | 57,702 |  |
| 21 | [WTW](https://www.tamtam.ai/c/wtw) (wtwco.com)<br>Offering data-driven solutions in people, risk, and capital areas, leveraging global expertise to enhance strategy, resilience, workforce motivation, and performance | Financial Services | 🇬🇧 London | 55,656 |  |
| 22 | [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 |
| 23 | [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 |  |
| 24 | [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 |
| 25 | [NatWest Group](https://www.tamtam.ai/c/natwest-group) (natwestgroup.com)<br>Support UK businesses by removing barriers, promoting learning, enhancing financial confidence, and championing climate solutions for sustainable community growth. | Banking | 🇬🇧 Edinburgh | 43,833 |  |
| 26 | [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 |
| 27 | [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 |  |
| 28 | [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 |
| 29 | [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 |  |
| 30 | [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 |
| 31 | [Marks and Spencer](https://www.tamtam.ai/c/marks-and-spencer) (jobs.marksandspencer.com)<br>Global retailer delivering quality products through physical and digital channels while prioritizing innovation and value for millions of customers across the world. | Retail | 🇬🇧 London | 40,055 | 1884 |
| 32 | [RELX](https://www.tamtam.ai/c/relx) (relx.com)<br>Global provider of information-based analytics for professionals across industries, helping customers make informed decisions through innovative solutions and technologies | Technology, Information and Media | 🇬🇧 London | 37,600 |  |
| 33 | [Virgin](https://www.tamtam.ai/c/virgin) (virgin.com)<br>A global investment group with diverse companies in travel, health, entertainment, telecommunications, and space, focused on customer experience and sustainability. | Venture Capital and Private Equity Principals | 🇬🇧 London | 36,222 |  |
| 34 | [Aviva](https://www.tamtam.ai/c/aviva-london) (aviva.com)<br>This company prioritizes their people, striving to create an inclusive workplace with market-leading benefits for employees and a strong connection to customers and communities | Insurance | 🇬🇧 London | 36,000 | 1696 |
| 35 | [Sky](https://www.tamtam.ai/c/sky) (sky.com)<br>A leading media and entertainment company offering innovative TV, streaming services, connectivity solutions, premium content production, and societal impact initiatives | Broadcast Media Production and Distribution | 🇬🇧 Middlesex | 35,346 | 1989 |
| 36 | [Wood](https://www.tamtam.ai/c/wood-aberdeen) (woodgroup.com)<br>A global consulting and engineering firm specializing in energy and materials markets, offering solutions in 60 countries and employing 35,000 people | Professional Services | 🇬🇧 Aberdeen | 34,666 | 1912 |
| 37 | [JD Sports Fashion](https://www.tamtam.ai/c/jd-sports-fashion) (careers.jdplc.com)<br>A global retailer and distributor of branded sportswear and fashionwear, with stores across Europe, North America, and Asia Pacific | Retail | 🇬🇧 Bury | 34,337 |  |
| 38 | [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 |  |
| 39 | [British Army](https://www.tamtam.ai/c/british-army) (mod.uk)<br>The British Army offers opportunities for personal growth, adventure, training, and camaraderie, with a focus on making a difference and building lifelong bonds | Armed Forces | 🇬🇧 Andover | 34,120 |  |
| 40 | [Serco](https://www.tamtam.ai/c/serco-hook) (serco.com)<br>Innovative solutions for global challenges in justice, migration, defense, space, health, and transport through service design, program management, and systems integration | IT Services and IT Consulting | 🇬🇧 Hook | 32,618 |  |
| 41 | [Hays](https://www.tamtam.ai/c/hays) (haysplc.com)<br>Specialist recruitment and workforce solutions provider offering advisory services, career transitions, and employer brand positioning, with a focus on empowering people and businesses to succeed globally | Staffing and Recruiting | 🇬🇧 London | 31,854 |  |
| 42 | [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 |  |
| 43 | [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 |
| 44 | [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 |  |
| 45 | [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 |  |
| 46 | [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 |
| 47 | [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 |  |
| 48 | [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 |
| 49 | [Coca-Cola Europacific Partners](https://www.tamtam.ai/c/coca-cola-europacific-partners) (cocacolaep.com)<br>This multinational company produces, distributes, and sells popular drink brands in Europe, Australia, Indonesia, and the Pacific region | Manufacturing | 🇬🇧 Uxbridge | 27,236 |  |
| 50 | [Anglo American](https://www.tamtam.ai/c/anglo-american) (angloamerican.com)<br>Global mining company producing essential metals and minerals with a focus on sustainability, innovation, and community value creation. | Mining | 🇬🇧 London | 26,768 |  |
| 51 | [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 |
| 52 | [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 |
| 53 | [Iceland Foods](https://www.tamtam.ai/c/iceland-foods) (icelandcareers.co.uk)<br>Retail company operating over 900 UK stores, European franchises, and global exports, emphasizing teamwork, customer focus, and a dynamic work environment. | Retail | 🇬🇧 Deeside | 26,000 | 1970 |
| 54 | [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 |  |
| 55 | [Capita](https://www.tamtam.ai/c/capita) (capita.com)<br>A leading provider of business services using data, technology, and people to simplify connections between governments, citizens, businesses, and customers | IT Services and IT Consulting | 🇬🇧 London | 25,581 | 1984 |
| 56 | [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 |  |
| 57 | [Balfour Beatty plc](https://www.tamtam.ai/c/balfour-beatty-plc) (balfourbeatty.com)<br>A global infrastructure group with 25,000 employees delivering innovative and efficient transportation, power, building, and utility systems for economic growth and community support | Construction | 🇬🇧 London | 25,000 | 1909 |
| 58 | [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 |  |
| 59 | [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 |  |
| 60 | [Mott MacDonald](https://www.tamtam.ai/c/mott-macdonald) (mottmac.com)<br>The company focuses on improving society through digital innovation, excellence, and solving intricate challenges with clients to deliver better outcomes | Civil Engineering | 🇬🇧 London | 24,653 | 1989 |
| 61 | [British Council](https://www.tamtam.ai/c/british-council) (britishcouncil.org)<br>Building global connections through arts, education, English language learning, and qualifications to empower individuals and foster international understanding. | Non-profit Organizations | 🇬🇧 London | 24,510 | 1934 |
| 62 | [VOIS](https://www.tamtam.ai/c/vois) (voiscentre.com)<br>Global strategic arm of Vodafone, creating value and efficiency across 28 countries through talent, technology, and transformation for business outcomes | IT Services and IT Consulting | 🇬🇧 London | 20,863 |  |
| 63 | [Bupa UK](https://www.tamtam.ai/c/bupa-uk) (bupa.co.uk)<br>International healthcare company dedicated to helping people live longer, healthier, happier lives by providing quality healthcare services to over 38 million customers worldwide | Hospitals and Health Care | 🇬🇧 London | 20,537 | 1947 |
| 64 | [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 |  |
| 65 | [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 |
| 66 | [Computacenter](https://www.tamtam.ai/c/computacenter) (computacenter.com)<br>A leading technology and services provider, trusted by large organizations, helping customers manage and transform their technology infrastructure for digital transformation | IT Services and IT Consulting | 🇬🇧 Hatfield | 20,070 | 1981 |
| 67 | [Travis Perkins plc](https://www.tamtam.ai/c/travis-perkins-plc) (travisperkinsplc.co.uk)<br>The company is a leading partner to the construction industry, helping to build better communities, with over 20,000 colleagues in multiple countries | Wholesale Building Materials | 🇬🇧 Northampton | 20,000 | 1797 |
| 68 | [World Vision](https://www.tamtam.ai/c/world-vision) (wvi.org)<br>A global humanitarian organization dedicated to improving the lives of children and families by addressing root causes of poverty worldwide | Non-profit Organizations | 🇬🇧 London | 19,419 | 1950 |
| 69 | [IHG Hotels & Resorts](https://www.tamtam.ai/c/ihg-hotels-and-resorts) (ihgplc.com)<br>Management of twenty-one diverse hotel brands across luxury, premium, and essential categories, operating thousands of properties and a major global loyalty program. | Hospitality | 🇬🇧 Windsor | 19,288 | 2003 |
| 70 | [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 |
| 71 | [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 |  |
| 72 | [Costa Coffee](https://www.tamtam.ai/c/costa-coffee) (costa.co.uk)<br>Global coffee brand offering stores, ready-to-drink products, self-serve machines, and home options, focusing on community and growth. | Retail | 🇬🇧 London | 18,739 | 1971 |
| 73 | [Menzies Aviation](https://www.tamtam.ai/c/menzies-aviation-london) (menziesaviation.com)<br>Providing ground handling, air cargo, and fueling services worldwide, ensuring safety, precision, and continuous support in aviation operations. | Airlines and Aviation | 🇬🇧 London | 18,695 | 1833 |
| 74 | [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 |
| 75 | [EY-Parthenon](https://www.tamtam.ai/c/ey-parthenon) (ey.com)<br>Multidisciplinary professionals across 120 countries provide actionable corporate, transaction, and turnaround strategies to clients using data analytics and digital capabilities | Business Consulting and Services | 🇬🇧 London | 18,536 |  |
| 76 | [Revolut](https://www.tamtam.ai/c/revolut) (revolut.com)<br>A fintech company on a mission to provide customers with more visibility, control, and freedom over their money through innovative products | Financial Services | 🇬🇧 London | 18,462 | 2015 |
| 77 | [RBS](https://www.tamtam.ai/c/rbs) (natwestgroup.com)<br>Announcement of rebranding from RBS to NatWest Group, encouraging followers to transition to the new company page for updates. | Banking | 🇬🇧 Gogarburn | 18,457 |  |
| 78 | [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 |
| 79 | [Royal Air Force (RAF)](https://www.tamtam.ai/c/royal-air-force-raf) (recruitment.raf.mod.uk)<br>Provides diverse career opportunities in aviation, engineering, medical, and logistics with world-class training and global operational roles. | Armed Forces | 🇬🇧 | 18,226 |  |
| 80 | [Centrica](https://www.tamtam.ai/c/centrica) (centrica.com)<br>A leading energy services provider with a focus on sustainability, offering zero carbon electricity to millions of customers through various brands | Utilities | 🇬🇧 Windsor | 18,164 |  |
| 81 | [Turner & Townsend](https://www.tamtam.ai/c/turner-and-townsend) (turnerandtownsend.com)<br>Partnerships delivering impactful projects and programmes in real estate, infrastructure, energy, and natural resources, turning challenges into opportunities. | Construction | 🇬🇧 Horsforth | 17,895 | 1946 |
| 82 | [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 |  |
| 83 | [Save the Children International](https://www.tamtam.ai/c/save-the-children-international) (savethechildren.net)<br>Support children's survival, protection, development, and participation worldwide through programs, campaigns, and partnerships in 120 countries. | Non-profit Organizations | 🇬🇧 London | 17,356 | 1919 |
| 84 | [Frasers Group](https://www.tamtam.ai/c/frasers-group) (frasers.group)<br>Operate multiple iconic retail brands across various sectors, innovating and expanding to create future-proof shopping experiences worldwide. | Retail | 🇬🇧 London | 16,785 | 1982 |
| 85 | [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 |  |
| 86 | [Aldi UK](https://www.tamtam.ai/c/aldi-uk) (aldirecruitment.co.uk)<br>Operates grocery stores and warehouses across the country, providing high quality products at low prices while offering employees competitive pay and benefits. | Retail | 🇬🇧 Atherstone | 16,172 |  |
| 87 | [The University of Edinburgh](https://www.tamtam.ai/c/the-university-of-edinburgh) (ed.ac.uk)<br>A world-leading university offering globally recognized teaching, research, and innovation for over 425 years, unlocking the potential of students worldwide | Research Services | 🇬🇧 Edinburgh | 16,057 | 1583 |
| 88 | [Michael Page](https://www.tamtam.ai/c/michael-page) (redirect.michaelpage.com)<br>Professional services recruitment with specialized teams offering local market knowledge and international network support across multiple industries and regions. | Staffing and Recruiting | 🇬🇧 Addlestone | 15,725 |  |
| 89 | [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 |  |
| 90 | [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 |  |
| 91 | [Clear Channel Europe](https://www.tamtam.ai/c/clear-channel-europe) (clearchanneleurope.com)<br>Leading outdoor media company across 14 markets, transforming advertising through data-driven innovations and infrastructure for brands and positive global impact. | Advertising Services | 🇬🇧 London | 15,206 |  |
| 92 | [Iron Mountain EMEA](https://www.tamtam.ai/c/iron-mountain-emea) (ironmountain.co.uk)<br>Global leader in storage and information management services with a vast network of facilities worldwide, offering solutions for records, data, and document management | IT Services and IT Consulting | 🇬🇧 London | 15,148 |  |
| 93 | [KPMG UK](https://www.tamtam.ai/c/kpmg-uk) (kpmg.com)<br>A leading UK provider of tax, audit, and advisory services with a global presence, focusing on innovative solutions and expertise for clients' needs | Business Consulting and Services | 🇬🇧 London | 15,102 | 1987 |
| 94 | [Howden](https://www.tamtam.ai/c/howden) (howdengroupholdings.com)<br>Employee-owned insurance group specializing in broking, reinsurance, underwriting, risk consultancy, and employee benefits with global expertise. | Insurance | 🇬🇧 London | 15,000 | 1994 |
| 95 | [University of Birmingham](https://www.tamtam.ai/c/university-of-birmingham) (birmingham.ac.uk)<br>A prestigious university with a century-long tradition of innovation and impactful research, shaping great minds and pushing boundaries of knowledge | Higher Education | 🇬🇧 Birmingham | 14,952 | 1900 |
| 96 | [Jumeirah](https://www.tamtam.ai/c/jumeirah) (jumeirah.com)<br>Operates luxury hotels, resorts, and residences across the Middle East, Europe, Asia, and Africa, offering distinguished service and creating joyful guest experiences. | Hospitality | 🇬🇧 Dubai | 14,775 | 1999 |
| 97 | [Petrofac](https://www.tamtam.ai/c/petrofac) (petrofac.com)<br>International energy service provider specializing in designing, building, managing, and maintaining oil, gas, refining, and renewable energy infrastructure for leading energy companies worldwide | Engineering Services | 🇬🇧 London | 14,616 | 1981 |
| 98 | [Whitbread](https://www.tamtam.ai/c/whitbread) (whitbreadcareers.com)<br>A hospitality company owning popular hotel and restaurant brands, employing over 35,000 people and focused on sustainability and community impact | Hospitality | 🇬🇧 Houghton Regis | 14,047 | 1742 |
| 99 | [B&Q](https://www.tamtam.ai/c/b-and-q) (bandqcareers.com)<br>Leading UK retailer offering home improvement and garden products with extensive store network, online marketplace, and community sustainability initiatives. | Retail | 🇬🇧 Southampton | 14,027 |  |
| 100 | [RWS Group](https://www.tamtam.ai/c/rws-group) (rws.com)<br>Content solutions company combining technology and human expertise to enhance ideas, data, and content for global brand communication. | Business Content | 🇬🇧 Maidenhead | 13,957 | 1958 |

## 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 the United Kingdom

- [The largest companies in the United Kingdom](https://www.tamtam.ai/l/largest-companies-united-kingdom) (36,548)
- [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)
- [Marketing and communications agencies in the United Kingdom](https://www.tamtam.ai/l/marketing-agencies-united-kingdom) (984)

## The same list elsewhere in United Kingdom

- [Multinational companies in Scotland](https://www.tamtam.ai/l/multinational-companies-scotland) (248)
- [Multinational companies in Northern Ireland](https://www.tamtam.ai/l/multinational-companies-northern-ireland) (84)
- [Multinational companies in Wales](https://www.tamtam.ai/l/multinational-companies-wales) (69)
- [Multinational companies in London](https://www.tamtam.ai/l/multinational-companies-london) (3,652)
- [Multinational companies in Manchester](https://www.tamtam.ai/l/multinational-companies-manchester) (163)
- [Multinational companies in Birmingham](https://www.tamtam.ai/l/multinational-companies-birmingham) (78)
- [Multinational companies in Glasgow](https://www.tamtam.ai/l/multinational-companies-glasgow) (69)
- [Multinational companies in Cambridge](https://www.tamtam.ai/l/multinational-companies-cambridge) (67)
- [Multinational companies in Leeds](https://www.tamtam.ai/l/multinational-companies-leeds) (67)
- [Multinational companies in Edinburgh](https://www.tamtam.ai/l/multinational-companies-edinburgh) (55)
- [Multinational companies in Milton Keynes](https://www.tamtam.ai/l/multinational-companies-milton-keynes) (53)
- [Multinational companies in Reading](https://www.tamtam.ai/l/multinational-companies-reading) (42)
- [Multinational companies in Bristol](https://www.tamtam.ai/l/multinational-companies-bristol) (41)
- [Multinational companies in Aberdeen](https://www.tamtam.ai/l/multinational-companies-aberdeen) (39)
- [Multinational companies in Oxford](https://www.tamtam.ai/l/multinational-companies-oxford) (37)
- [Multinational companies in Belfast](https://www.tamtam.ai/l/multinational-companies-belfast) (35)
- [Multinational companies in Nottingham](https://www.tamtam.ai/l/multinational-companies-nottingham) (34)
- [Multinational companies in Coventry](https://www.tamtam.ai/l/multinational-companies-coventry) (30)
- [Multinational companies in Leicester](https://www.tamtam.ai/l/multinational-companies-leicester) (29)
- [Multinational companies in Newcastle upon Tyne](https://www.tamtam.ai/l/multinational-companies-newcastle-upon-tyne) (27)
- [Multinational companies in Watford](https://www.tamtam.ai/l/multinational-companies-watford) (27)
- [Multinational companies in Liverpool](https://www.tamtam.ai/l/multinational-companies-liverpool) (26)
- [Multinational companies in Sheffield](https://www.tamtam.ai/l/multinational-companies-sheffield) (26)

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