These London-based companies are predominantly large law firms offering a wide range of legal services globally. They advise corporations, financial institutions, and governments on complex legal matters, transactions, and disputes. Notable firms include DLA Piper, a global firm managing cross-border projects, Clifford Chance, which provides legal advice to diverse clients, and Clyde & Co, specializing in insurance and transport.
The data shows a strong concentration of global legal expertise within London, with many firms like Freshfields and Linklaters providing innovative solutions in complex markets. Several of these firms, such as Freshfields (founded 1743) and Addleshaw Goddard (founded 1775), have long histories, indicating established legal practices.
| # | Company | Employees | |||
|---|---|---|---|---|---|
| 1 |
DLA Piperdlapiper.com
Global law firm providing innovative legal services, managing cross-border projects, transactions, disputes, and supporting business growth worldwide. |
13,449 | |||
| 2 |
Clifford Chancecliffordchance.com
A global law firm providing high-quality legal advice to a diverse range of clients, including corporations, governments, regulators, and non-profit organizations worldwide |
8,435 | |||
| 3 |
Clyde & Coclydeco.com
A global law firm specializing in insurance, transport, infrastructure, energy, and trade Committed to diversity, community support, and environmental sustainability |
7,472 | |||
| 4 |
Linklaterslinklaters.com
It is a global law firm providing legal expertise and innovative solutions to clients navigating complex markets and regulatory environments. |
7,110 | |||
| 5 |
Freshfieldsfreshfields.com
Global law firm supporting leading corporations, financial institutions, and governments on ground-breaking mandates worldwide through 2,800+ lawyers in multiple offices |
6,920 | |||
| 6 |
Eversheds Sutherlandeversheds-sutherland.com
Global law practice offering high quality, innovative solutions for diverse clients worldwide, specializing in complex business issues with a people-focused approach |
6,217 | |||
| 7 |
Ashurstashurst.com
Leading global law firm offering legal, risk consulting, and NewLaw services. Manages complex multi-jurisdictional transactions, disputes, and projects for corporates, financial institutions, and governments. |
5,236 | |||
| 8 |
DWFdwfgroup.com
Global provider of integrated legal and business services across various sectors, offering bespoke solutions for clients with efficiency, price certainty, and transparency |
4,848 | |||
| 9 |
Pinsent Masonspinsentmasons.com
Multinational professional services firm, legal foundation, diverse skill sets, technology, processes, competitive advantage clients, business-critical advice complex regulatory environments. |
4,403 | |||
| 10 | 
London Commercial Solicitors
Specialized team of lawyers offering comprehensive and personalized legal services to businesses and individuals, with a focus on achieving expectations and solving legal issues |
3,778 | |||
| 11 |
Crown Prosecution Servicecps.gov.uk
Prosecutes criminal cases investigated by police, decides charges, prepares court cases, supports victims, ensuring justice and public interest. |
3,735 | |||
| 12 |
Addleshaw Goddardaddleshawgoddard.com
Providing comprehensive legal advice and solutions across over 50 business law areas to clients in more than 100 countries worldwide. |
3,391 | |||
| 13 |
Bird & Birdtwobirds.com
Providing legal services worldwide with expertise in technology and digital transformation, supporting clients across multiple industries and regions. |
3,196 | |||
| 14 |
DAC Beachcroftdacbeachcroft.com
Leading international legal business, partnering with clients for sustainable growth, defending their business and reputation with tailored commercial, transactional, claims, risk, and advisory legal services. |
3,183 | |||
| 15 | 3,161 | ||||
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 | 3,160 | ||||
| 17 |
Kennedyskennedyslaw.com
Global law firm specializing in litigation, insurance, and liability sectors with expertise in advisory services Operates worldwide with a focus on regulatory impact |
3,028 | |||
| 18 |
Simmons & Simmonssimmons-simmons.com
Legal services for regulated sectors including finance, energy, healthcare, and technology, focusing on business partnership and efficient solutions. |
2,921 | |||
| 19 |
Herbert Smith Freehillshsfkramer.com
Global law firm providing comprehensive legal services across multiple sectors, focusing on client solutions and international expertise. |
2,491 | |||
| 20 |
Osborne Clarkeosborneclarke.com
Provide commercial legal advice and services across sectors, focusing on client success amid digital, economic, and environmental challenges worldwide. |
2,480 | |||
| 21 |
Slaughter and Mayslaughterandmay.com
A prestigious law firm advising on international transactions, with expertise in M&A, corporate law, financing, tax, competition, dispute resolution, real estate, and more |
2,086 | |||
| 22 | 1,861 | ||||
| 23 |
Shoosmithsshoosmiths.com
A leading law firm in the UK and Brussels, known for exceptional service, innovative solutions, and commitment to ESG and community support |
1,596 | |||
| 24 |
Ampa - Legal & Professional Servicesampa.co.uk
Ampa is a group of legal and professional services companies in the UK, dedicated to unlocking potential for individuals and businesses |
1,565 | |||
| 25 |
The Law Societylawsociety.org.uk
This company promotes and protects solicitors, upholds the rule of law, and supports justice in England and Wales 鈿栵笍 |
1,526 | |||
| 26 |
Stephenson Harwood LLPstephensonharwood.com
International law firm specializing in energy, healthcare, private capital, technology, and transportation sectors with global offices and extensive client partnerships. |
1,484 | |||
| 27 |
Mills & Reevemills-reeve.com
Legal firm providing tailored advice and responsive support globally, driven by values of ambition, openness, care, and collaboration. |
1,483 | |||
| 28 |
Mishcon de Reya LLPmishcon.com
A London-based law firm providing high-quality, cross-border legal services while valuing diversity, creativity, integrity, and building strong client relationships |
1,480 | |||
| 29 |
Witherswithersworldwide.com
It provides legal services to individuals, families, and businesses, focusing on private capital and addressing complex legal challenges globally. |
1,410 | |||
| 30 |
Charles Russell Speechlyscharlesrussellspeechlys.com
International law firm specializing in private capital, combining personal, family, and business legal expertise with global reach and partnerships. |
1,397 | |||
Turn this list into pipeline
Tamtam finds the decision-makers at every company on a list like this one, with verified emails, phone numbers and the buying signals that tell you when to reach out.
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.
More company lists in London
- The largest companies in London 12,882
- Multinational companies in London 3,652
- Financial Services companies in London 1,862
- Financial services firms in London 1,824
- SaaS companies in London 1,615
- Professional services firms in London 1,248
- Software Development companies in London 1,217
- Retail chains in London 942
- IT Services and IT Consulting companies in London 693
- Companies with a mobile app in London 667
- Consulting firms in London 648
- IT services companies in London 607
- Subscription businesses in London 544
- Venture capital and private equity firms in London 539
- Marketing and communications agencies in London 533
- Retail Apparel and Fashion companies in London 498
- Advertising Services companies in London 480
- Companies with in-house R&D in London 477
- AI companies in London 456
- Investment Management companies in London 452
- Hotel and hospitality groups in London 445
- Luxury brands in London 428
- AI-native companies in London 407
- E-commerce companies in London 384