# 30 leading multinational companies in London

Tamtam tracks 3,652 multinational companies headquartered in London. This list ranks the 30 largest by number of employees on LinkedIn, led by EY, Shell and HSBC. Their median headcount is 55,143.

These London-headquartered multinational companies are large enterprises, primarily operating in professional services, financial services, and telecommunications. Among them are EY, a global organization providing assurance, consulting, and tax services; Shell, a global energy company with a focus on cleaner solutions; and HSBC, a global financial services organization serving individuals, companies, and governments. Also notable are Vodafone, which connects people globally through technology, and G4S, a security and facility services company.

The list reflects London's strength as a hub for major financial institutions and professional services firms, with companies like Barclays, Standard Chartered, and Lloyds Banking Group all based in the city. The presence of global energy giants like Shell and bp, alongside telecommunications providers such as BT Group, further highlights the diverse yet interconnected nature of these large multinational operations.

🇬🇧 London · 30 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 | [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 |
| 5 | [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 |
| 6 | [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 |  |
| 7 | [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 |  |
| 8 | [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 |
| 9 | [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 |  |
| 10 | [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 |  |
| 11 | [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 |  |
| 12 | [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 |  |
| 13 | [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 |  |
| 14 | [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 |  |
| 15 | [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 |
| 16 | [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 |  |
| 17 | [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 |
| 18 | [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 |
| 19 | [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 |  |
| 20 | [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 |
| 21 | [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 |
| 22 | [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 |  |
| 23 | [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 |  |
| 24 | [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 |
| 25 | [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 |  |
| 26 | [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 |  |
| 27 | [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 |  |
| 28 | [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 |
| 29 | [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 |  |
| 30 | [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 |  |

## 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 London

- [The largest companies in London](https://www.tamtam.ai/l/largest-companies-london) (12,882)
- [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)
- [Fintech companies in London](https://www.tamtam.ai/l/fintech-companies-london) (384)

## The same list elsewhere in United Kingdom

- [Multinational companies in the United Kingdom](https://www.tamtam.ai/l/multinational-companies-united-kingdom) (7,458)
- [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 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)

---

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