# Corporate groups and holding companies headquartered in the United Kingdom

Tamtam tracks 666 corporate groups and holding companies headquartered in the United Kingdom. This list ranks the 100 largest by number of employees on LinkedIn, led by RELX, Balfour Beatty plc and University of Oxford. Their median headcount is 3,080. Half of them were founded in 1970 or later. The most common headquarters are London (31), Manchester (4) and Coventry (2).

These are large corporate groups and holding companies in the United Kingdom, primarily based in London, with a strong presence in various sectors. Notably, RELX is a global provider of information-based analytics, Balfour Beatty plc is a global infrastructure group, and the University of Oxford is a leading higher education institution.

The companies listed exhibit a diverse range of industries, including technology, construction, banking, and higher education. A significant pattern observed is the concentration of headquarters in London, with several other major cities like Oxford, Glasgow, and Coventry also hosting large employers.

🇬🇧 United Kingdom · 100 companies · Updated Nov 12, 2026

| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [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 |  |
| 2 | [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 |
| 3 | [University of Oxford](https://www.tamtam.ai/c/university-of-oxford) (ox.ac.uk)<br>A leading university in various academic disciplines, fostering innovation, entrepreneurship, and social support while upholding respect and banning hate speech | Higher Education | 🇬🇧 Oxford | 23,103 | 1096 |
| 4 | [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 |  |
| 5 | [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 |  |
| 6 | [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 |
| 7 | [Bank of Communications Co., Ltd. London Branch](https://www.tamtam.ai/c/bank-of-communications-co-ltd-london-branch) (bankcomm.com.hk)<br>Provides commercial banking, securities, trust services, financial leasing, fund management, and insurance through a vast network of domestic branches and international overseas institutions. | Banking | 🇬🇧 | 12,670 | 1908 |
| 8 | [RSK Group](https://www.tamtam.ai/c/rsk-group) (rskgroup.com)<br>Global provider of environmental consultancy and engineering services, integrating innovation and multidisciplinary collaboration to address complex sustainability challenges. | Environmental Services | 🇬🇧 Helsby | 12,442 |  |
| 9 | [The Weir Group PLC](https://www.tamtam.ai/c/the-weir-group-plc) (global.weir)<br>Global leader providing innovative, efficient, and sustainable mining technology solutions combining engineering, materials science, and intelligent automation expertise. | Mining | 🇬🇧 Glasgow | 10,199 | 1871 |
| 10 | [Smiths Group plc](https://www.tamtam.ai/c/smiths-group-plc) (smiths.com)<br>A global pioneer in engineering for over 170 years, improving the world by serving millions and creating a safer, more efficient, and better-connected world | Industrial Machinery Manufacturing | 🇬🇧 | 9,866 | 1851 |
| 11 | [Informa](https://www.tamtam.ai/c/informa) (informa.com)<br>Leading international business in events, digital services, and academic knowledge, connecting specialists worldwide to learn, know, and do more in their fields | Information Services | 🇬🇧 London | 9,410 | 1998 |
| 12 | [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 |
| 13 | [SThree](https://www.tamtam.ai/c/sthree) (sthree.com)<br>Connecting skilled STEM professionals with organizations to drive innovation and solve complex challenges through specialist brands and tailored workforce solutions. | Business Consulting and Services | 🇬🇧 London | 7,927 |  |
| 14 | [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 |
| 15 | [NatWest](https://www.tamtam.ai/c/natwest) (natwest.com)<br>Provides comprehensive banking services to personal, small business, and SME customers, supports the UK economy through lending to businesses, and fosters entrepreneurship. | Banking | 🇬🇧 | 7,041 |  |
| 16 | [Severn Trent](https://www.tamtam.ai/c/severn-trent) (severntrent.com)<br>Provision of clean water and safe wastewater removal for homes, schools, businesses, and hospitals, focusing on community care and quality service. | Utilities | 🇬🇧 Coventry | 7,000 | 1974 |
| 17 | [David Lloyd Clubs](https://www.tamtam.ai/c/david-lloyd-clubs) (davidlloyd.co.uk)<br>Largest European health and fitness group operating clubs with gyms, pools, racquet sports, spas, kids facilities, and social spaces for families. | Wellness and Fitness Services | 🇬🇧 Hatfield | 6,843 | 1982 |
| 18 | [SABMiller](https://www.tamtam.ai/c/sabmiller) (ab-inbev.com)<br>Global brewing company formed by AB InBev and SABMiller merger, producing and distributing beer and beverages worldwide. | Food and Beverage Services | 🇬🇧 Woking | 6,716 |  |
| 19 | [Acacium Group](https://www.tamtam.ai/c/acacium-group) (linktr.ee)<br>Global healthcare delivery partner with 40+ years experience offering workforce access, technology, and expertise to improve healthcare, social care, and life sciences worldwide | Hospitals and Health Care | 🇬🇧 London | 5,961 |  |
| 20 | [KELLER](https://www.tamtam.ai/c/keller) (keller.com)<br>A global geotechnical specialist contractor that solves construction challenges with local focus, expertise, and a track record of successful projects | Construction | 🇬🇧 London | 5,930 |  |
| 21 | [Stonegate Group](https://www.tamtam.ai/c/stonegate-group) (careers.stonegatecareers.co.uk)<br>A leading UK pub company with 4,500+ sites nationwide, offering unforgettable experiences, career development, and a focus on teamwork and success | Hospitality | 🇬🇧 Shirley | 5,799 | 2010 |
| 22 | [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 |  |
| 23 | [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 |
| 24 | [Imperial Tobacco](https://www.tamtam.ai/c/imperial-tobacco) (imperial-tobacco.com)<br>Global tobacco business within Imperial Brands PLC, offering a diverse portfolio of cigarette, cigar, and tobacco brands with a focus on growth and innovation | Tobacco | 🇬🇧 | 5,470 | 1901 |
| 25 | [ScottishPower](https://www.tamtam.ai/c/scottishpower) (scottishpower.com)<br>Leading renewable energy generation, managing electricity grids, and supporting homes and businesses in transitioning to a low carbon future. | Utilities | 🇬🇧 Glasgow | 5,295 |  |
| 26 | [AQA](https://www.tamtam.ai/c/aqa) (aqa.org.uk)<br>Leading provider of accessible qualifications and support services for teachers and students Sets and marks GCSEs and A-levels in the UK Reinvests profits into research | Education Administration Programs | 🇬🇧 Manchester | 5,188 | 2000 |
| 27 | [Coats](https://www.tamtam.ai/c/coats) (coats.com)<br>A global leader in thread manufacturing and performance materials, providing innovative, sustainable solutions for apparel, footwear, and other industries worldwide | Textile Manufacturing | 🇬🇧 London | 5,122 | 1755 |
| 28 | [Bourne Leisure Ltd](https://www.tamtam.ai/c/bourne-leisure-ltd) (jobs.haven.com)<br>A leading holiday and holiday home business with parks, resorts, and hotels across the UK focusing on creating unforgettable memories for guests | Travel Arrangements | 🇬🇧 Hemel Hempstead | 4,931 |  |
| 29 | [MAG (Airports Group)](https://www.tamtam.ai/c/mag-airports-group) (magairports.com)<br>Ownership and operation of three major UK airports, digital travel services, extensive route network, economic contribution, and sustainability focus. | Airlines and Aviation | 🇬🇧 Manchester | 4,902 | 2001 |
| 30 | [Cygnet](https://www.tamtam.ai/c/cygnet) (cygnetgroup.com)<br>Providing health and social care services for individuals with mental health needs, brain injuries, eating disorders, autism, and learning disabilities in the UK. | Hospitals and Health Care | 🇬🇧 London | 4,847 | 1988 |
| 31 | [PZ Cussons](https://www.tamtam.ai/c/pz-cussons) (pzcussons.com)<br>Global household brand company offering extraordinary products, recognition for talent, and endless opportunities for those with a positive attitude and ambition | Manufacturing | 🇬🇧 Manchester | 4,797 | 1884 |
| 32 | [Arriva Group](https://www.tamtam.ai/c/arriva-group) (arrivagroup.com)<br>A leading passenger transport operator in Europe, providing a wide range of transportation services across 10 European countries | Ground Passenger Transportation | 🇬🇧 Sunderland | 4,733 | 1938 |
| 33 | [RSS Global](https://www.tamtam.ai/c/rss-global) (rssglobal.com)<br>A portfolio of staffing brands specializing in workforce solutions across various sectors in the UK, Ireland, and Asia Pacific | Staffing and Recruiting | 🇬🇧 London | 4,535 |  |
| 34 | [Interserve](https://www.tamtam.ai/c/interserve) (interserve.com)<br>Delivers construction, ground shoring, and justice services worldwide, including equipment services and community rehabilitation, for diverse global clients and communities. | Construction | 🇬🇧 Twyford | 4,459 |  |
| 35 | [Murphy](https://www.tamtam.ai/c/murphy) (murphygroup.com)<br>Provides engineering and construction services across transportation, water, power, natural resources, and property sectors in UK, Ireland, and Canada. | Civil Engineering | 🇬🇧 London | 4,078 | 1951 |
| 36 | [McLaren Group](https://www.tamtam.ai/c/mclaren-group) (mclaren.com)<br>High-technology brand specializing in Formula 1 racing, high-performance road cars, and advanced technology applications across multiple industries. | Motor Vehicle Manufacturing | 🇬🇧 Woking | 4,025 |  |
| 37 | [Noventiq](https://www.tamtam.ai/c/noventiq) (noventiq.com)<br>A global digital transformation and cybersecurity solutions provider connecting 80,000+ organizations, with a diverse portfolio and active M&A strategy for growth | IT Services and IT Consulting | 🇬🇧 London | 3,941 |  |
| 38 | [Wates Group](https://www.tamtam.ai/c/wates-group) (wates.co.uk)<br>Established in 1897, this leading UK company provides construction, development, and property services to clients in both the public and private sectors | Construction | 🇬🇧 Leatherhead | 3,938 | 1897 |
| 39 | [Places for People](https://www.tamtam.ai/c/places-for-people) (placesforpeople.co.uk)<br>It is a leading social enterprise in the UK, focusing on community development, housing, leisure, and social impact initiatives. | Real Estate | 🇬🇧 London | 3,935 |  |
| 40 | [CareTech](https://www.tamtam.ai/c/caretech) (caretech-uk.com)<br>National provider of support for individuals with Autism, Learning Disabilities, Mental Health, and neurological conditions through residential care and in-home services across the UK | Hospitals and Health Care | 🇬🇧 Uxbridge | 3,695 | 1993 |
| 41 | [Betfred](https://www.tamtam.ai/c/betfred) (betfredcareers.com)<br>A leading betting and gaming company with over 50 years of experience, operating in multiple countries, providing innovative services while promoting responsible gambling | Gambling Facilities and Casinos | 🇬🇧 Birchwood | 3,652 | 1967 |
| 42 | [Galliford Try](https://www.tamtam.ai/c/galliford-try) (gallifordtry.co.uk)<br>A UK contractor specializing in building and infrastructure, offering whole life solutions to public and private clients in building, highways, and environmental sectors | Construction | 🇬🇧 Uxbridge | 3,635 |  |
| 43 | [Endeavour Mining](https://www.tamtam.ai/c/endeavour-mining) (endeavourmining.com)<br>Senior gold producer operating mines and development projects across West Africa, focusing on responsible mining and sustainable community value. | Mining | 🇬🇧 London | 3,594 | 2010 |
| 44 | [Admiral Group - MBA Leadership Programs](https://www.tamtam.ai/c/admiral-group-mba-leadership-programs) (admiraljobs.co.uk)<br>A company seeking future leaders who can make a difference, inspire teams, and grow into great leaders within a personalized and impactful environment | Financial Services | 🇬🇧 Cardiff | 3,515 | 1991 |
| 45 | [Vistry Group](https://www.tamtam.ai/c/vistry-group) (vistrygroup.co.uk)<br>Development and delivery of affordable and private homes through partnerships, timber-frame manufacturing, and multiple well-known housing brands in the UK. | Construction | 🇬🇧 Kent | 3,501 | 2020 |
| 46 | [ZIGUP](https://www.tamtam.ai/c/zigup) (zigup.com)<br>An integrated mobility solutions platform offering vehicle services across the vehicle life cycle, with a diversified fleet and extensive network | Motor Vehicle Manufacturing | 🇬🇧 Darlington | 3,193 |  |
| 47 | [City & Guilds](https://www.tamtam.ai/c/city-and-guilds) (cityandguilds.com)<br>Providing comprehensive skills training, credentials, and workforce development solutions through a global network to support employment and career growth. | Education | 🇬🇧 London | 3,140 | 1878 |
| 48 | [Yorkshire Building Society](https://www.tamtam.ai/c/yorkshire-building-society) (ybs.co.uk)<br>mutual financial institution managing assets for members, focusing on customer care, community support, and employee well-being. | Financial Services | 🇬🇧 Bradford | 3,114 | 1864 |
| 49 | [Booker](https://www.tamtam.ai/c/booker) (bookergroupjobs.co.uk)<br>Leading UK food and drink wholesaler with nationwide distribution centres, cash and carry branches, serving pubs, restaurants, hotels, and convenience stores. | Wholesale | 🇬🇧 Wellingborough | 3,094 |  |
| 50 | [London South Bank University](https://www.tamtam.ai/c/london-south-bank-university) (lsbu.ac.uk)<br>Provides engaging courses, industry connections, and real-world experience to empower diverse students to unlock their potential for success in work and life | Higher Education | 🇬🇧 London | 3,080 | 1892 |
| 51 | [Stolt-Nielsen](https://www.tamtam.ai/c/stolt-nielsen) (stolt-nielsen.com)<br>Global provider of bulk-liquid and chemical logistics, transportation, storage services, and innovative sustainable aquaculture producing premium seafood species. | Transportation, Logistics, Supply Chain and Storage | 🇬🇧 London | 3,069 | 1959 |
| 52 | [DMGT](https://www.tamtam.ai/c/dmgt) (dmgt.com)<br>Management of companies delivering information, analysis, insight, events, news, and entertainment to businesses and consumers with market leadership. | Information Services | 🇬🇧 London | 3,022 |  |
| 53 | [LNT Group](https://www.tamtam.ai/c/lnt-group) (lntcaredevelopments.co.uk)<br>Group of companies operating in care homes, construction, software, industrial products, and racing, focusing on quality and innovation. | Construction | 🇬🇧 Garforth | 2,939 |  |
| 54 | [Peninsula UK](https://www.tamtam.ai/c/peninsula-uk) (peninsulagrouplimited.com)<br>Provides employment law, HR, and health & safety services, including training, tax, payroll, software, and employee assistance programs to businesses. | Human Resources Services | 🇬🇧 Manchester | 2,888 | 1983 |
| 55 | [Persimmon Homes](https://www.tamtam.ai/c/persimmon-homes) (persimmonhomes.com)<br>Construction of affordable homes, providing apprenticeships, manufacturing building materials, ensuring broadband connectivity, and fostering sustainable community development across Britain. | Construction | 🇬🇧 York | 2,860 | 1972 |
| 56 | [NLNG](https://www.tamtam.ai/c/nlng) (nlng.com)<br>Harnessing natural gas resources, producing Liquefied Natural Gas (LNG) and Natural Gas Liquids (NGLs) for export, operating ship chartering and manning services. | Oil and Gas | 🇬🇧 Port Harcourt | 2,848 | 1989 |
| 57 | [Voyage Care Ltd](https://www.tamtam.ai/c/voyage-care-ltd) (voyagecare.com)<br>Provides person-centred care and support for individuals with disabilities and mental health needs across various living and community settings. | Hospitals and Health Care | 🇬🇧 Lichfield | 2,787 | 1988 |
| 58 | [G's Group](https://www.tamtam.ai/c/g-s-group) (gs-fresh.com)<br>Grows finest quality salads and vegetables, supplying major UK and European retailers with a vast range of fresh, tasty, and healthy produce. | Food and Beverage Manufacturing | 🇬🇧 Ely | 2,721 | 1952 |
| 59 | [Advantage Smollan](https://www.tamtam.ai/c/advantage-smollan) (advantagesmollan.com)<br>Local experts providing consistent service and strong client relationships, leveraging global insights, innovation, and technology for growth. | Advertising Services | 🇬🇧 Winnersh | 2,706 |  |
| 60 | [Renishaw](https://www.tamtam.ai/c/renishaw) (renishaw.com)<br>Engineering and scientific technology company, specializing in precision measurement, healthcare solutions, and additive manufacturing for diverse global industries. | Automation Machinery Manufacturing | 🇬🇧 Wotton-under-Edge | 2,613 | 1973 |
| 61 | [Sumer](https://www.tamtam.ai/c/sumer) (sumer.co.uk)<br>Championing small to medium UK and Ireland businesses by uniting expert firms to provide collaborative support and growth solutions. | Accounting | 🇬🇧 London | 2,608 |  |
| 62 | [Pixel United](https://www.tamtam.ai/c/pixel-united) (pixelunited.com)<br>A global free-to-play mobile games business, part of Aristocrat Leisure Ltd, with a focus on building top games and driving positive change | Computer Games | 🇬🇧 London | 2,594 |  |
| 63 | [Willmott Dixon](https://www.tamtam.ai/c/willmott-dixon) (willmottdixon.co.uk)<br>Privately-owned construction and interior fit-out specialist committed to creating a lasting positive impact through building and community enhancement efforts Exceptional workplace recognized by Sunday Times | Construction | 🇬🇧 Letchworth Garden City | 2,534 | 1852 |
| 64 | [Markerstudy Group](https://www.tamtam.ai/c/markerstudy-group) (markerstudy.com)<br>Specialist in niche motor insurance products targeting unique customer segments, leveraging expert underwriting and strong broker relationships. | Insurance | 🇬🇧 Sevenoaks | 2,498 | 2001 |
| 65 | [Travelopia](https://www.tamtam.ai/c/travelopia) (globalcareers.travelopia.com)<br>Specializing in extraordinary travel experiences, this company offers diverse and exciting adventures for customers worldwide, inspiring them to seek out new experiences | Travel Arrangements | 🇬🇧 Surbiton | 2,493 | 2017 |
| 66 | [AXIS (AXIS Capital)](https://www.tamtam.ai/c/axis-axis-capital) (axiscapital.com)<br>specialty insurer and reinsurer providing tailored insurance and reinsurance solutions globally, focusing on collaboration, diversity, and responsible business practices | Insurance | 🇬🇧 Pembroke | 2,493 |  |
| 67 | [Bellway Homes](https://www.tamtam.ai/c/bellway-homes) (bellway.co.uk)<br>A leading house builder with a national presence, focusing on regional needs, building quality homes, and contributing positively to local communities | Construction | 🇬🇧 Newcastle upon Tyne | 2,487 | 1946 |
| 68 | [HF](https://www.tamtam.ai/c/hf) (h-f.co.uk)<br>Specialist legal services for insurance claims, supporting SMEs and PLCs with tailored advice and comprehensive claims handling expertise. | Legal Services | 🇬🇧 Salford | 2,485 | 1969 |
| 69 | [IVC Evidensia](https://www.tamtam.ai/c/ivc-evidensia) (ivcevidensia.com)<br>Global veterinary group providing comprehensive animal health services focused on improving animal well-being and owner satisfaction worldwide. | Veterinary Services | 🇬🇧 Keynsham | 2,471 |  |
| 70 | [Pertemps Network Group](https://www.tamtam.ai/c/pertemps-network-group) (linktr.ee)<br>This company has been connecting individuals with the right jobs since 1961, specializing in permanent, temporary, and contract positions across various industries | Staffing and Recruiting | 🇬🇧 Meriden | 2,411 | 1961 |
| 71 | [Blenheim Chalcot](https://www.tamtam.ai/c/blenheim-chalcot) (blenheimchalcot.com)<br>A venture builder investing in high-growth sectors by providing funds, expertise, and infrastructure to build profitable, scalable companies globally | Technology, Information and Internet | 🇬🇧 London | 2,370 | 1998 |
| 72 | [Cohort plc](https://www.tamtam.ai/c/cohort-plc) (cohortplc.com)<br>An AIM listed parent company overseeing six businesses in defence and related markets, focusing on adding value while preserving growth potential | Defense and Space Manufacturing | 🇬🇧 Theale | 2,347 |  |
| 73 | [CCH Group](https://www.tamtam.ai/c/cch-group) (candchealthcare.co.uk)<br>Providing extensive care services across the UK with 260 sites and 13,000 employees delivering 1.5 million care hours monthly. | Hospitals and Health Care | 🇬🇧 Nottingham | 2,326 |  |
| 74 | [The De Beers Group of Companies](https://www.tamtam.ai/c/the-de-beers-group-of-companies) (debeersgroup.com)<br>A global leader in the exploration, mining, and marketing of rough diamonds with over a century of unrivaled expertise and experience | Mining & Metals | 🇬🇧 London | 2,241 | 1888 |
| 75 | [Hachette UK](https://www.tamtam.ai/c/hachette-uk) (hachette.co.uk)<br>Publishing diverse books including fiction, non-fiction, children's books, educational materials, puzzles, gifts, games, e-books, and audiobooks globally. | Book and Periodical Publishing | 🇬🇧 London | 2,219 |  |
| 76 | [Trinity Mirror plc](https://www.tamtam.ai/c/trinity-mirror-plc) (trinitymirror.com)<br>Leading UK multimedia content publisher with a national presence through newspapers and websites, offering news, entertainment, and information to millions | Newspapers | 🇬🇧 London | 2,218 | 1832 |
| 77 | [Aptia Group](https://www.tamtam.ai/c/aptia-group) (aptia-group.com)<br>Professional services firm combining technology and expertise to simplify pensions, health, and insurance management for businesses and individuals globally. | Professional Services | 🇬🇧 London | 2,209 | 2023 |
| 78 | [Linnaeus](https://www.tamtam.ai/c/linnaeus) (linnaeusgroup.co.uk)<br>Leading veterinary services group in the UK, backed by Mars Petcare, offering specialist and first opinion veterinary services with a focus on top-quality patient care | Veterinary Services | 🇬🇧 Shirley | 2,189 | 2014 |
| 79 | [Zen Educate](https://www.tamtam.ai/c/zen-educate) (zeneducate.com)<br>This company is revolutionizing education recruitment by saving schools money on agency fees, providing skilled staff, and offering a user-friendly online platform | Education Administration Programs | 🇬🇧 London | 2,147 | 2017 |
| 80 | [ED&F Man Commodities](https://www.tamtam.ai/c/ed-and-f-man-commodities) (edfman.com)<br>Global provider of agricultural commodities including coffee, sugar, molasses, animal feeds, and fish oil with strong sustainability focus. | International Trade and Development | 🇬🇧 London | 2,142 | 1783 |
| 81 | [Lanes Group](https://www.tamtam.ai/c/lanes-group) (lanesgroup.com)<br>A diversified wastewater solutions provider offering drainage, rail maintenance, sewer rehabilitation, and environmental services with a focus on innovation and service excellence | Utilities | 🇬🇧 Leeds | 2,125 | 1992 |
| 82 | [Shaw Trust](https://www.tamtam.ai/c/shaw-trust) (shawtrust.org.uk)<br>A social purpose organization focused on challenging inequality, providing employment opportunities, and supporting social mobility through various services and support | Non-profit Organizations | 🇬🇧 London | 2,124 | 1982 |
| 83 | [Collinson Group](https://www.tamtam.ai/c/collinson-group) (collinsongroup.com)<br>Global company specializing in travel solutions, airport experiences, loyalty programs, insurance, and customer engagement for millions of consumers worldwide | Consumer Services | 🇬🇧 London | 2,108 | 1989 |
| 84 | [Sofina Foods Europe](https://www.tamtam.ai/c/sofina-foods-europe) (sofinafoods.com)<br>Production and distribution of high-quality pork and seafood products across Europe, focusing on sustainability, innovation, and customer satisfaction. | Food and Beverage Manufacturing | 🇬🇧 | 2,067 |  |
| 85 | [Clarion Housing Group](https://www.tamtam.ai/c/clarion-housing-group) (clarionhg.com)<br>providing affordable homes to 360,000 people, building new homes annually, supporting residents through charitable programs focused on work, neighborhoods, and sustainability | Real Estate | 🇬🇧 London | 2,038 | 2016 |
| 86 | [Huws Gray](https://www.tamtam.ai/c/huws-gray) (huwsgraygroup.co.uk)<br>A leading independent builders merchant in the UK with 249 branches, offering opportunities for career development and a customer-focused approach | Wholesale Building Materials | 🇬🇧 Llangefni | 2,029 | 1990 |
| 87 | [Urenco Global](https://www.tamtam.ai/c/urenco-global) (urenco.com)<br>Supplier of nuclear fuel enrichment services using centrifuge technology, ensuring safe, reliable, and sustainable nuclear fuel supply globally. | Utilities | 🇬🇧 London | 2,027 | 1970 |
| 88 | [FD Technologies](https://www.tamtam.ai/c/fd-technologies) (fdtechnologies.com)<br>A data-driven group that offers technology, services in capital markets, and predictive marketing solutions to drive organizations forward globally | IT Services and IT Consulting | 🇬🇧 Newry | 2,025 | 1996 |
| 89 | [London Borough of Barking and Dagenham](https://www.tamtam.ai/c/london-borough-of-barking-and-dagenham) (lbbd.gov.uk)<br>A growing London borough investing in physical infrastructure, community, housing, a film studio, a university campus, and a Youth Zone Visit website for more information | Government Administration | 🇬🇧 London | 2,002 | 1965 |
| 90 | [Sir Robert McAlpine](https://www.tamtam.ai/c/sir-robert-mcalpine) (srm.com)<br>Family-owned company specializing in building and infrastructure across the UK, creating future heritage through construction, civil engineering, and project management since 1869. | Construction | 🇬🇧 Kings Langley | 2,000 | 1869 |
| 91 | [Newsquest Media Group](https://www.tamtam.ai/c/newsquest-media-group) (newsquest.co.uk)<br>A regional media company in the UK, part of Gannett Inc, with a focus on local news, digital advertising, and marketing solutions | Newspaper Publishing | 🇬🇧 Newport | 1,984 |  |
| 92 | [Drax Group](https://www.tamtam.ai/c/drax-group) (drax.com)<br>Renewable power generation using sustainable biomass, hydro-electric, and pumped storage; global bioenergy supply with carbon negative ambition. | Utilities | 🇬🇧 Selby | 1,983 |  |
| 93 | [GRAHAM Group](https://www.tamtam.ai/c/graham-group) (graham.co.uk)<br>Specializes in delivering construction and development projects across the UK and Ireland, encompassing building, civil engineering, interior fit out, facilities management, and investment projects. | Construction | 🇬🇧 Hillsborough | 1,933 | 1778 |
| 94 | [Islamic Relief Worldwide](https://www.tamtam.ai/c/islamic-relief-worldwide) (islamic-relief.org)<br>faith-based agency providing emergency relief, development projects for vulnerable people globally. Tackles poverty, protects communities from disasters, empowers individuals to transform lives. | Non-profit Organizations | 🇬🇧 Birmingham | 1,921 | 1984 |
| 95 | [NWG (Northumbrian Water Group)](https://www.tamtam.ai/c/nwg-northumbrian-water-group) (nwl.co.uk)<br>Provides water and sewerage services to millions in North East and South East England, focusing on customer service and reliability. | Utilities | 🇬🇧 Durham | 1,866 |  |
| 96 | [South Staffordshire Plc](https://www.tamtam.ai/c/south-staffordshire-plc) (south-staffordshire.com)<br>Integrated services group operating regulated water supply businesses and offering waste, infrastructure, compliance, software, and water logistics solutions. | Utilities | 🇬🇧 Walsall | 1,822 |  |
| 97 | [Lucy Group Ltd](https://www.tamtam.ai/c/lucy-group-ltd) (lucygroup.com)<br>International group providing sustainable infrastructure, smart energy distribution, advanced street lighting controls, and responsible property development for eco-friendly living. | Appliances, Electrical, and Electronics Manufacturing | 🇬🇧 Oxford | 1,814 | 1812 |
| 98 | [Wessex Water](https://www.tamtam.ai/c/wessex-water) (wessexwater.co.uk)<br>Regional water and sewage treatment services in southwest England, including engineering, construction, property development, waste management, and renewable energy. | Utilities | 🇬🇧 Bath | 1,765 |  |
| 99 | [10N Collective](https://www.tamtam.ai/c/10n-collective) (10ncollective.com)<br>Global collective of urbanism, architecture, and design experts focused on sustainable citymaking, environmental and social responsibility across continents. | Architecture and Planning | 🇬🇧 London | 1,735 | 2025 |
| 100 | [Hunting](https://www.tamtam.ai/c/hunting) (huntingplc.com)<br>Global energy services provider to top oil and gas companies, specializing in manufacturing and distributing products for extraction Headquartered in the UK | Oil and Gas | 🇬🇧 London | 1,713 | 1874 |

## 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

- [Corporate groups and holding companies in England](https://www.tamtam.ai/l/holding-companies-england) (578)
- [Corporate groups and holding companies in Scotland](https://www.tamtam.ai/l/holding-companies-scotland) (39)
- [Corporate groups and holding companies in London](https://www.tamtam.ai/l/holding-companies-london) (210)

## The same list elsewhere

- [Corporate groups and holding companies in the world](https://www.tamtam.ai/l/holding-companies-in-the-world) (12,864)
- [Corporate groups and holding companies in Europe](https://www.tamtam.ai/l/holding-companies-in-europe) (4,396)

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