This selection of accounting firms in London includes large global networks and significant national providers. EY, for instance, is a global organization offering assurance, consulting, and tax services across 150 countries. KPMG UK focuses on tax, audit, and advisory, while PwC UK builds trust through professional services. Azets provides advisory, accounting, and HR solutions across Northern Europe, and BDO UK offers tax, audit, and business advisory services.
The firms listed are predominantly large professional services organizations, many with a global reach. A notable pattern is the historical presence of several firms, with BDO UK founded in 1903, Grant Thornton UK in 1904, Moore Global in 1907, MHA in 1880, and S&W in 1881, indicating a long-established financial services sector in London.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 | 404,207 | ||||
| 2 | 15,102 | ||||
| 3 | 10,873 | ||||
| 4 | 7,523 | ||||
| 5 | 6,800 | ||||
| 6 |
Grant Thornton UKgrantthornton.co.uk
Providing assurance, tax, and advisory services through a global network, combining local insight with flexible, client-focused solutions. |
5,972 | |||
| 7 |
Daviesdavies-group.com
Specialist professional services and technology firm providing risk management, business process optimization, and digital transformation solutions to insurance, regulated, and global businesses |
5,693 | |||
| 8 | 5,025 | ||||
| 9 |
RSMrsm.global
Global network providing assurance, tax, and consulting services focused on middle-market businesses with client-centric, insightful, and resource-sharing approach. |
4,090 | |||
| 10 |
Moore Globalmoore-global.com
Global accounting and advisory firm with over 37,000 professionals in 114 countries, dedicated to helping clients thrive through expert guidance and support |
3,884 | |||
| 11 | 3,439 | ||||
| 12 |
Sumersumer.co.uk
Championing small to medium UK and Ireland businesses by uniting expert firms to provide collaborative support and growth solutions. |
2,608 | |||
| 13 |
S&Wswgroup.com
Financial and professional services firm specializing in wealth management, accountancy, tax advisory, and investment management solutions. |
2,218 | |||
| 14 | 1,518 | ||||
| 15 |
Moore Kingston Smithmooreks.co.uk
Providing multi-disciplinary advisory, tax, and audit services to diverse clients locally and internationally, fostering positive change and understanding. |
1,358 | |||
Want more companies than this list?This page shows the largest ones only. Connect to Tamtam to see every company that matches, filter by size, industry or growth, and reach their decision-makers. | |||||
| 16 |
Xeinadinxeinadin.com
Providing expert business advice infused with technology and global expertise, Xeinadin Group empowers companies to reach their strategic objectives efficiently |
1,323 | |||
| 17 |
Safferysaffery.com
A partner-led top 20 accountancy firm specializing in corporate finance, entrepreneurs, and international clients, committed to long-term relationships and tailored strategies |
1,322 | |||
| 18 |
Interpathinterpath.com
Providing expertise and creative solutions for critical business decisions, guiding clients towards the right path quickly |
1,220 | |||
| 19 |
No Commenteuropa-recht.eu
An independent firm providing comprehensive accounting services to clients in various sectors, including taxation, audit, bookkeeping, and payroll processing with a personalized approach |
1,191 | |||
| 20 |
Menzies LLPmenzies.co.uk
Leading UK advisory and accountancy firm offering financial, operational, and strategic support to businesses and individuals internationally across various sectors |
1,115 | |||
| 21 |
PKF Globalpkf.com
Network of independent firms providing audit, accounting, tax, legal, and business advisory services across 150 countries worldwide. |
877 | |||
| 22 | 872 | ||||
| 23 |
Blick Rothenbergblickrothenberg.com
Leading tax, accounting and business advisory firm offering audit, accounting, business advisory, corporate and personal tax services built on integrity and expertise. |
736 | |||
| 24 |
Grant Thornton International Ltdgrantthornton.global
Global professional services firm providing assurance, tax, and advisory services with a personal, agile, and proactive approach in over 149 countries |
727 | |||
| 25 |
PKF Littlejohnpkf-l.com
A fast-growing firm of accountants and business advisers in London, Leeds, and Manchester, offering audit, tax, and advisory services with expertise in capital markets, insurance, international businesses, and charities |
715 | |||
| 26 |
HaysMachaysmac.com
Top 30 chartered accountants and tax advisors providing services to businesses, charities, and organizations, with international reach through MSI Global Alliance |
702 | |||
| 27 |
Kreston Reeveskrestonreeves.com
Providing personalized accountancy, business, and wealth advice with a focus on social responsibility, guiding clients and communities towards a brighter future |
614 | |||
| 28 |
UHY Hacker Younguhy-uk.com
Award-winning UK chartered accountants with 24 offices across England, Wales, and Northern Ireland providing full service support for commercial and personal financial matters |
611 | |||
| 29 |
Buzzacottbuzzacott.co.uk
A top 25 UK accountancy firm based in London, providing tailored expertise for private clients, businesses, and not-for-profit organizations worldwide |
591 | |||
| 30 | 591 | ||||
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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 12, 2026.
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