30 leading publicly traded companies in London (2026 list)

This selection of publicly traded companies in London comprises large multinational corporations. Key sectors represented include financial services, with firms like HSBC and Barclays, oil and gas through Shell and bp, and telecommunications, notably Vodafone and BT Group. Other significant companies are GSK in pharmaceutical manufacturing and Sainsbury's in retail.

A notable pattern among these companies is their predominant focus on global markets, indicated by their extensive international operations. Most of these firms were established in the 20th century, with some, like Sainsbury's, dating back to the 19th century, reflecting a long history of corporate presence in London.

#	Company	Industry	Headquarters	Employees	Founded
1	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
2	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
3	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
4	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
5	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
6	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
7	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
8	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
9	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
10	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
11	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
12	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
13	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
14	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
15	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
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16	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
17	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
18	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
19	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
20	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
21	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
22	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
23	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
24	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
25	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
26	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
27	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
28	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
29	Frasers Group frasers.group Operate multiple iconic retail brands across various sectors, innovating and expanding to create future-proof shopping experiences worldwide.	Retail	🇬🇧 London	16,785	1982
30	Babcock International Group babcockinternational.com 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	n/a

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How this list is built

Every company on this list has a Tamtam company profile. The industry is the one the company gives on LinkedIn; categories such as SaaS or fintech are classified by Tamtam's AI from the company's website and LinkedIn page; and the headquarters city must match the company's own address. Companies are ranked by the number of employees on LinkedIn, and the list is refreshed every night. Classifications can be wrong, so treat the list as a starting point rather than an official ranking. Last updated Nov 13, 2026.

30 leading publicly traded companies in London

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