# 30 leading publicly traded companies in London
Tamtam tracks 277 publicly traded companies headquartered in London. This list ranks the 30 largest by number of employees on LinkedIn, led by Shell, HSBC and Vodafone. Their median headcount is 47,673.
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.
๐ฌ๐ง London ยท 30 companies ยท Updated Nov 13, 2026
| # | Company | Industry | Headquarters | Employees | Founded |
|---|---|---|---|---|---|
| 1 | [Shell](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 208,511 | |
| 2 | [HSBC](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 197,879 | |
| 3 | [Vodafone](https://www.tamtam.ai/c/vodafone) (vodafone.com)
Using technology to connect people globally, drive social change, and improve lives while emphasizing the importance of humanity and collaboration | Telecommunications | ๐ฌ๐ง London | 142,740 | 1982 |
| 4 | [Aon](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 93,574 | |
| 5 | [GSK](https://www.tamtam.ai/c/gsk) (gsk.com)
Uniting science, technology, and talent to advance healthcare and disease prevention through collaborative innovation and community engagement. | Pharmaceutical Manufacturing | ๐ฌ๐ง London | 92,092 | |
| 6 | [bp](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 85,000 | 1909 |
| 7 | [Barclays](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 82,417 | |
| 8 | [Kingfisher plc](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 80,000 | |
| 9 | [Standard Chartered](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 79,401 | |
| 10 | [BT Group](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 73,712 | |
| 11 | [Sainsbury's](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 68,549 | 1869 |
| 12 | [Lloyds Banking Group](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 57,702 | |
| 13 | [WTW](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 55,656 | |
| 14 | [BAE Systems](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 55,143 | 1999 |
| 15 | [FCA Fiat Chrysler Automobiles](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 47,673 | |
| 16 | [BAT](https://www.tamtam.ai/c/bat) (bat.com)
Global consumer goods company focused on transitioning adult smokers to scientifically substantiated reduced-risk smokeless alternatives across multiple international markets. | Manufacturing | ๐ฌ๐ง London | 46,311 | 1902 |
| 17 | [Marks and Spencer](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 40,055 | 1884 |
| 18 | [RELX](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 37,600 | |
| 19 | [Aviva](https://www.tamtam.ai/c/aviva-london) (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 | ๐ฌ๐ง London | 36,000 | 1696 |
| 20 | [Diageo](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 34,137 | |
| 21 | [Hays](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 31,854 | |
| 22 | [Rolls-Royce](https://www.tamtam.ai/c/rolls-royce) (rolls-royce.com)
Engineering excellence driving critical technologies for air, sea, and land, powering, protecting, and connecting people worldwide. | Industrial Machinery Manufacturing | ๐ฌ๐ง London | 31,649 | |
| 23 | [Anglo American](https://www.tamtam.ai/c/anglo-american) (angloamerican.com)
Global mining company producing essential metals and minerals with a focus on sustainability, innovation, and community value creation. | Mining | ๐ฌ๐ง London | 26,768 | |
| 24 | [Capita](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 25,581 | 1984 |
| 25 | [LSEG](https://www.tamtam.ai/c/lseg) (lseg.com)
Provides financial indexing, benchmarking, analytic services, technology solutions, and integrated market infrastructure across data, capital markets, and post-trade. | Financial Services | ๐ฌ๐ง London | 25,298 | |
| 26 | [Balfour Beatty plc](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 25,000 | 1909 |
| 27 | [Entain](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 18,906 | |
| 28 | [Haleon](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 18,581 | 2022 |
| 29 | [Frasers Group](https://www.tamtam.ai/c/frasers-group) (frasers.group)
Operate multiple iconic retail brands across various sectors, innovating and expanding to create future-proof shopping experiences worldwide. | Retail | ๐ฌ๐ง London | 16,785 | 1982 |
| 30 | [Babcock International Group](https://www.tamtam.ai/c/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 | ๐ฌ๐ง London | 16,474 | |
## 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.
## More company lists in London
- [The largest companies in London](https://www.tamtam.ai/l/largest-companies-london) (12,882)
- [Multinational companies in London](https://www.tamtam.ai/l/multinational-companies-london) (3,652)
- [Financial Services companies in London](https://www.tamtam.ai/l/financial-services-companies-london) (1,862)
- [Financial services firms in London](https://www.tamtam.ai/l/financial-services-firms-london) (1,824)
- [SaaS companies in London](https://www.tamtam.ai/l/saas-companies-london) (1,615)
- [Professional services firms in London](https://www.tamtam.ai/l/professional-services-firms-london) (1,248)
- [Software Development companies in London](https://www.tamtam.ai/l/software-development-companies-london) (1,217)
- [Retail chains in London](https://www.tamtam.ai/l/retail-chains-london) (942)
- [IT Services and IT Consulting companies in London](https://www.tamtam.ai/l/it-services-and-it-consulting-companies-london) (693)
- [Companies with a mobile app in London](https://www.tamtam.ai/l/companies-with-mobile-app-london) (667)
- [Consulting firms in London](https://www.tamtam.ai/l/consulting-firms-london) (648)
- [IT services companies in London](https://www.tamtam.ai/l/it-services-companies-london) (607)
- [Subscription businesses in London](https://www.tamtam.ai/l/subscription-businesses-london) (544)
- [Venture capital and private equity firms in London](https://www.tamtam.ai/l/vc-and-private-equity-firms-london) (539)
- [Marketing and communications agencies in London](https://www.tamtam.ai/l/marketing-agencies-london) (533)
- [Retail Apparel and Fashion companies in London](https://www.tamtam.ai/l/retail-apparel-and-fashion-companies-london) (498)
- [Advertising Services companies in London](https://www.tamtam.ai/l/advertising-services-companies-london) (480)
- [Companies with in-house R&D in London](https://www.tamtam.ai/l/r-and-d-companies-london) (477)
- [AI companies in London](https://www.tamtam.ai/l/ai-companies-london) (456)
- [Investment Management companies in London](https://www.tamtam.ai/l/investment-management-companies-london) (452)
- [Hotel and hospitality groups in London](https://www.tamtam.ai/l/hospitality-groups-london) (445)
- [Luxury brands in London](https://www.tamtam.ai/l/luxury-brands-london) (428)
- [AI-native companies in London](https://www.tamtam.ai/l/ai-native-companies-london) (407)
- [E-commerce companies in London](https://www.tamtam.ai/l/ecommerce-companies-london) (384)
## The same list elsewhere in United Kingdom
- [Publicly traded companies in the United Kingdom](https://www.tamtam.ai/l/publicly-traded-companies-united-kingdom) (765)
## The same list elsewhere
- [Publicly traded companies in the world](https://www.tamtam.ai/l/publicly-traded-companies-in-the-world) (11,531)
- [Publicly traded companies in Europe](https://www.tamtam.ai/l/publicly-traded-companies-in-europe) (3,622)
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Source: https://www.tamtam.ai/l/publicly-traded-companies-london