The 100 largest companies in the United Kingdom (2026 list)

#	Company	Industry	Headquarters	Employees	Founded
1	EY ey.com 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	n/a
2	NHS www.nhs.uk It provides comprehensive healthcare services to UK residents, employing over 1.5 million staff and ensuring free access at the point of use.	Food and Beverage Services	🇬🇧	252,871	1948
3	UK Civil Service gov.uk This company implements government policies, delivering essential public services in the UK	Government Administration	🇬🇧 London	238,504	n/a
4	Shell shell.com 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	n/a
5	HSBC hsbc.com 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	n/a
6	Unilever unilever.com 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
7	Vodafone vodafone.com 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
8	FUJITSU global.fujitsu 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
9	G4S g4s.com 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
10	Aon aon.com 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	n/a
11	ANY Company any.company Connect, promote, and find partners with a focus on building stronger connections and faster growth in the global marketplace Tailored solutions for businesses	IT Services and IT Consulting	🇬🇧 London	93,110	2018
12	GSK gsk.com Uniting science, technology, and talent to advance healthcare and disease prevention through collaborative innovation and community engagement.	Pharmaceutical Manufacturing	🇬🇧 London	92,092	n/a
13	Tesco tescoplc.com 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	n/a
14	bp bp.com 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
15	Barclays home.barclays 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	n/a
16	Kingfisher plc kingfisher.com 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	n/a
17	AstraZeneca astrazeneca.com Pioneering healthcare transformation through the potential of science, impacting individuals, society, and the environment for a healthier future	Pharmaceutical Manufacturing	🇬🇧 Cambridge	79,513	n/a
18	Standard Chartered sc.com 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	n/a
19	Avon avonworldwide.com 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	n/a
20	BT Group bt.com A global communications services company connecting people through technology to address challenges like the pandemic, climate change, and cyber security	Telecommunications	🇬🇧 London	73,712	n/a
21	Sainsbury's sainsburys.jobs 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
22	Linde linde.com 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
23	Compass Group compass-group.com 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
24	NHS England england.nhs.uk This organization collaborates with NHS Improvement to enhance care delivery, transparency, and services for patients in England while prioritizing efficiency and accountability	Hospitals and Health Care	🇬🇧 London	59,120	2012
25	Lloyds Banking Group lloydsbankinggroup.com 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	n/a
26	WTW wtwco.com 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	n/a
27	BAE Systems baesystems.com 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
28	Asda asda.jobs Large retail business providing diverse career opportunities across shop floors, doorsteps, and technology sectors to improve customer experiences through store and online innovations.	Retail	🇬🇧 Leeds	52,216	n/a
29	FCA Fiat Chrysler Automobiles stellantis.com 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	n/a
30	BAT bat.com 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
31	NatWest Group natwestgroup.com Support UK businesses by removing barriers, promoting learning, enhancing financial confidence, and championing climate solutions for sustainable community growth.	Banking	🇬🇧 Edinburgh	43,833	n/a
32	JLR jlr.com 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
33	Department for Education gov.uk Develop education, training, and social care policies, offer diverse job roles, flexible work, and community involvement opportunities across England.	Government Administration	🇬🇧 London	43,294	n/a
34	Reckitt reckitt.com Focus on providing high-quality hygiene, wellness, and nourishment products, aiming for global access and sustainable growth for healthier communities.	Manufacturing	🇬🇧 Slough	43,000	n/a
35	BBC bbc.co.uk 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
36	WPP wpp.com Creative transformation company uses creativity to build better futures for people, planet, clients, and communities	Advertising Services	🇬🇧 London	41,040	n/a
37	Rio Tinto riotinto.com 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
38	Marks and Spencer jobs.marksandspencer.com 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
39	Royal Mail linktr.ee Connecting businesses, customers, and communities in the UK by providing universal postal service to over 29 million addresses, aiming to be the best delivery company in Europe	Freight and Package Transportation	🇬🇧 London	39,215	n/a
40	RELX relx.com 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	n/a
41	John Lewis Partnership jlpjobs.com Employee-owned business operating department stores and supermarkets focused on quality service, retail innovation, and shared responsibility among partners for collective success and growth.	Retail	🇬🇧 London	36,517	n/a
42	Virgin virgin.com 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	36,396	n/a
43	Aviva aviva.com 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
44	Sky sky.com 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
45	Morrisons morrisons.jobs A team-focused company providing shopping trips, career opportunities, fresh food, and great value for customers, while prioritizing community partnerships and employee well-being	Retail	🇬🇧 Bradford	34,861	n/a
46	Wood woodgroup.com 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
47	JD Sports Fashion careers.jdplc.com A global retailer and distributor of branded sportswear and fashionwear, with stores across Europe, North America, and Asia Pacific	Retail	🇬🇧 Bury	34,337	n/a
48	Diageo diageo.com 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	n/a
49	British Army mod.uk 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	n/a
50	Department for Work and Pensions (DWP)gov.uk The company is responsible for welfare, pensions, child maintenance, and benefits, aiming to reduce poverty, promote work, and ensure financial security for all	Government Administration	🇬🇧 London	33,465	1948
51	Serco serco.com 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	n/a
52	Hays haysplc.com 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	n/a
53	Rolls-Royce rolls-royce.com Engineering excellence driving critical technologies for air, sea, and land, powering, protecting, and connecting people worldwide.	Industrial Machinery Manufacturing	🇬🇧 London	31,649	n/a
54	Intertek intertek.com 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
55	UK Ministry of Defence gov.uk 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	n/a
56	CHANEL chanel.com 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	n/a
57	Nothing nothing.tech 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
58	Imperial Brands PLC imperialbrandsplc.com An innovative global FMCG business with inclusive culture, focused on tobacco harm reduction, sustainability, and strong international brands	Manufacturing	🇬🇧 Bristol	29,000	n/a
59	Network Rail networkrail.co.uk Managing and modernising Britain's railway infrastructure to ensure safe, reliable transport for passengers and freight, supporting economic growth.	Rail Transportation	🇬🇧 Milton Keynes	28,033	n/a
60	Boots UK boots.jobs 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
61	Coca-Cola Europacific Partners cocacolaep.com This multinational company produces, distributes, and sells popular drink brands in Europe, Australia, Indonesia, and the Pacific region	Manufacturing	🇬🇧 Uxbridge	27,236	n/a
62	HM Revenue & Customs gov.uk UK's tax, payments, and customs authority, collecting funds for public services, providing financial support, ensuring tax compliance, and combating fraudulent activities	Government Administration	🇬🇧 London	26,882	2005
63	Anglo American angloamerican.com Global mining company producing essential metals and minerals with a focus on sustainability, innovation, and community value creation.	Mining	🇬🇧 London	26,768	n/a
64	Arup arup.com 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
65	Next careers.next.co.uk 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
66	Iceland Foods icelandcareers.co.uk 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
67	TechnipFMC technipfmc.com 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	n/a
68	Capita capita.com 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
69	LSEG lseg.com Provides financial indexing, benchmarking, analytic services, technology solutions, and integrated market infrastructure across data, capital markets, and post-trade.	Financial Services	🇬🇧 London	25,298	n/a
70	Balfour Beatty plc balfourbeatty.com 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
71	Edutech artbees.co.uk A London-based company is an official Google for Education Partner, offering implementation, configuration, training, and support for Chromebooks and G Suite	Software Development	🇬🇧 London	24,990	n/a
72	Kantar kantar.com 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	n/a
73	UCL ucl.ac.uk Leading multidisciplinary university in London, promoting academic excellence, inclusive education, and impactful research addressing real-world challenges.	Research Services	🇬🇧 London	24,678	n/a
74	Mott MacDonald mottmac.com 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
75	British Council britishcouncil.org 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
76	Department for Culture, Media and Sport civil-service-careers.gov.uk Supporting culture, arts, media, sport, tourism, and civil society in England, championing sports and cultural industries, enhancing community cohesiveness Governed by the Department for Culture, Media and Sport	Government Administration	🇬🇧 London	24,000	n/a
77	University of Oxford ox.ac.uk 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
78	Co-op coop.co.uk A large consumer co-operative in the UK, offering a variety of services including food retail, funeral services, insurance, and legal services	Retail	🇬🇧 Manchester	21,184	n/a
79	Santander UK santander.co.uk Providing personal and commercial financial products and services to millions of customers, fostering diversity and a positive workplace culture.	Banking	🇬🇧 London	21,000	n/a
80	VOIS voiscentre.com 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	n/a
81	King's College London kcl.ac.uk Top-ranked university offering world-class education and research, fostering innovation and positive societal impact globally and locally.	Research Services	🇬🇧 London	20,705	n/a
82	Ministry of Justice UK gov.uk Government department responsible for justice system administration, legal affairs, courts, prisons, and public safety in the United Kingdom.	Government Administration	🇬🇧 London	20,603	2007
83	Bupa UK bupa.co.uk 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
84	University of Cambridge cam.ac.uk 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	n/a
85	The University of Manchester manchester.ac.uk 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
86	Computacenter computacenter.com 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
87	Travis Perkins plc travisperkinsplc.co.uk 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
88	Metropolitan Police police.uk This organization polices London, handling law enforcement investigations, and also holds national responsibility for specialist units and counter-terrorism policing across the UK.	Law Enforcement	🇬🇧 Westminster	19,966	1829
89	World Vision wvi.org 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
90	IHG Hotels & Resorts ihgplc.com 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
91	Mitie mitie.com Offers various specialist services like security, engineering, cleaning, landscaping, energy, property consultancy, maintenance, and custody support. Takes care of customer people and buildings.	Facilities Services	🇬🇧 London	19,246	1987
92	Smith+Nephew smith-nephew.com 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
93	Clinic clinic.co.uk Independent creative agency crafting bold ideas to drive action and change, with a focus on people's experiences and problem-solving for brands	Advertising Services	🇬🇧 London	19,192	1983
94	Entain entaingroup.com 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	n/a
95	Costa Coffee costa.co.uk 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
96	Menzies Aviation menziesaviation.com 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
97	Transport for London tfl.gov.uk London-based transportation company leading in providing diverse travel options, focusing on customer feedback, technology innovation, and large-scale investments for city-wide mobility improvements	Non-profit Organizations	🇬🇧 London	18,658	2000
98	Haleon haleon.com 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
99	Waitrose & Partners jlpjobs.com A unique business that focuses on creating happier and more trusted ways of operating, with a shared purpose to make a positive impact on society	Retail	🇬🇧 Bracknell	18,555	1904
100	EY-Parthenon ey.com 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	n/a

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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 Oct 9, 2026.

The 100 largest companies in the United Kingdom

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