Company lists · Data refreshed September 2026

Top 25 Derivatives law firms based in London, United Kingdom

Name: Derivatives law firms based in London, United Kingdom
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 11, 2026 88 companies tracked

RevenueBase identified 88 derivatives law firms headquartered in London, United Kingdom as of September 2026 and tracks 1,825 professional contacts across them, including 1,214 with verified work emails and 132 with mobile numbers. London is the largest hub.

This list covers derivatives law firms headquartered in London, United Kingdom, matched on what each company actually does as described in its own words. Ranked by team size, largest first. Every row shows the company's own description, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 11, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, the natural-language company search RevenueBase customers use to build their own targeted lists and unlock verified emails and direct dials at the companies on them. How these lists are built and judged.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 11, 2026 86% judged on-target in blind review

88Companies

1,825Contacts tracked

1,214Verified emails

132Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest derivatives law firms based in London, United Kingdom

Ranked by team size

Top 25 of 88 derivatives law firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 11, 2026. RevenueBase Smart Search rates how each company's information relates to derivatives law firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Stewarts	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	201-500	495 contacts →
	Partial evidence “Stewarts is a law firm like no other.” Source: RevenueBase Database · checked Sep 11, 2026
2	FOX Williams	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	223 contacts →
	Partial evidence “Fox Williams is a leading law firm based in the City of London, trusted by its clients to provide quality advice with a high level of partner involvement and an astute commercial…” Source: RevenueBase Database · checked Sep 11, 2026
3	Signature Litigation	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	146 contacts →
	Partial evidence “Signature Litigation is a London-based law firm with offices in Paris, Gibraltar and Frankfurt, specialising in commercial litigation and arbitration.” Source: RevenueBase Database · checked Sep 11, 2026
4	Hunters LAW LLP	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	97 contacts →
	Indirect evidence “Legal issues can be complex and stressful – even those which might initially seem straightforward.” Source: RevenueBase Database · checked Sep 11, 2026
5	Enyo LAW LLP	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	80 contacts →
	Indirect evidence “We are a disputes-only firm.” Source: RevenueBase Database · checked Sep 11, 2026
6	Pallas Partners LLP	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	63 contacts →
	Indirect evidence “Focused on delivering phenomenal results, challenging traditional notions, and placing your interests at the forefront of everything that we do – Pallas leverages bold, winning…” Source: RevenueBase Database · checked Sep 11, 2026
7	Mariana UFP LLP	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	48 contacts →
	Indirect evidence “Founded in 2009 and headquartered in the City of London, Mariana UFP employs over 140 people across our offices in New York, Paris, Lisbon, Dubai and Melbourne.” Source: RevenueBase Database · checked Sep 11, 2026
8	Rosling King LLP	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	45 contacts →
	Partial evidence “Rosling King is a rapidly growing UK-based law firm specialising in serving the needs of financial institutions and the real estate, private equity and construction sectors.” Source: RevenueBase Database · checked Sep 11, 2026
9	Rosenblatt LAW	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	38 contacts →
	Partial evidence “Rosenblatt Law - the experts you come to with an opportunity to seize or an issue to solve.” Source: RevenueBase Database · checked Sep 11, 2026
10	Cooke, Young & Keidan LLP	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	37 contacts →
	Partial evidence “Cooke, Young & Keidan is a leading boutique litigation and arbitration law firm, based in the City of London.” Source: RevenueBase Database · checked Sep 11, 2026
11	Ingram Winter Green LLP	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	36 contacts →
	Partial evidence “London City Law Firm.” Source: RevenueBase Database · checked Sep 11, 2026
12	Saunders LAW	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	51-200	36 contacts →
	Partial evidence “Located in the heart of London's legal district, Saunders Law is a litigation powerhouse, built on the many years of experience of its founding solicitor principals.” Source: RevenueBase Database · checked Sep 11, 2026
13	Seladore Legal	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	34 contacts →
	Partial evidence “We are a disputes only law firm specialising in major and complex litigation and arbitration, with a particular emphasis on multi-party, multi-jurisdictional disputes.” Source: RevenueBase Database · checked Sep 11, 2026
14	Mayer Brown International LLP	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	27 contacts →
	Partial evidence “Mayer Brown is a distinctively global law firm, uniquely positioned to advise the world’s leading companies and financial institutions on their most complex deals and disputes.” Source: RevenueBase Database · checked Sep 11, 2026
15	Humphries Kerstetter LLP	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	25 contacts →
	Partial evidence “Humphries Kerstetter LLP is a boutique law firm based in the United Kingdom specialising in complex and international commercial dispute resolution.” Source: RevenueBase Database · checked Sep 11, 2026
16	Quillon LAW	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	23 contacts →
	Partial evidence “Quillon Law is a specialist, commercial disputes-only practice.” Source: RevenueBase Database · checked Sep 11, 2026
17	CIS	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	21 contacts →
	Indirect evidence “International Debt Collection Agency In fact, we are not just an outstanding international debt recovery agency.” Source: RevenueBase Database · checked Sep 11, 2026
18	Zaiwalla & CO	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	20 contacts →
	Indirect evidence “Founded in 1982 by Senior Partner Sarosh Zaiwalla, Zaiwalla & Co is the first English solicitors firm in the one square mile financial district of the City of London started by a…” Source: RevenueBase Database · checked Sep 11, 2026
19	Solum Financial LTD	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	16 contacts →
	Partial evidence “Solum is a financial consultancy specialising in derivatives.” Source: RevenueBase Database · checked Sep 11, 2026
20	KMT Solicitors	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	15 contacts →
	Partial evidence “Established in 2009, Karam, Missick & Traube LLP Solicitors is a full-service law firm in the heart of London specialising in corporate matters and dispute resolution with a…” Source: RevenueBase Database · checked Sep 11, 2026
21	Burgess Okoh Saunders	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	14 contacts →
	Partial evidence “Located in the heart of London’s West End, we are an innovative law firm that personalises our engagements to deliver a tailored and reliable service to our clients.” Source: RevenueBase Database · checked Sep 11, 2026
22	Gresham Legal	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	14 contacts →
	Partial evidence “Gresham Legal is a specialist disputes law firm located at 9 Old Buildings, Lincoln's Inn, London WC2A 3SR.” Source: RevenueBase Database · checked Sep 11, 2026
23	Hill Dickinson	Indirect evidence	London, United KingdomHQ checked Sep 11, 2026	1,001-5,000	13 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 11, 2026
24	Lewis Mathys Emmerson LLP	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	1-10	12 contacts →
	Partial evidence “Lewis Mathys Emmerson LLP is a law firm providing first class legal solutions with unequalled client care.” Source: RevenueBase Database · checked Sep 11, 2026
25	Barnes LAW Associates	Partial evidence	London, United KingdomHQ checked Sep 11, 2026	11-50	12 contacts →
	Partial evidence “Barnes Law operates from Mayfair, where precision meets purpose.” Source: RevenueBase Database · checked Sep 11, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: derivatives law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names derivatives law firms.
Partial evidence: Its own public description names part of derivatives law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name derivatives law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 88 derivatives law firms based in London, United Kingdom

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 1,214 reachable decision-makers.

Free signup · no credit card

View the full list →

Derivatives law firms based in London, United Kingdom at a glance

As of Sep 11, 2026

66.5%Verified-email coverage

7.2%Mobile-number coverage

20.7Average contacts per company

1-10Median size (employees)

108.0%Largest-city concentration · London

Sep 11, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

1,001-5,000

Freshness & accuracy

How recently the business emails were verified and the company information checked

Email last verified

Median 14.0d

1,1260–30

8731–60

061–90

090–180

1180+

Company record updated

Median 63.0d

00–30

82531–60

73661–90

14790–180

117180+

How this list was built

Company categories are rarely black and white. RevenueBase reads each company's own description of its business to decide whether it belongs among derivatives law firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search rating on every row are there so you can check each match yourself.

Source: The RevenueBase company graph: 60 million companies and 398.9 million professional contacts resolved from primary sources, queried with RevenueBase Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in London, United Kingdom whose own description of what they do matches “derivatives law firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search: RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names derivatives law firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude: Companies whose own description does not clearly place them among derivatives law firms, and records with no verified work email. Companies headquartered outside London are excluded even when they keep an office there.
Match quality: In blind human judging of this matching method, 86% of matched companies were on target. Expect roughly 1 in 7 rows to be adjacent to the category rather than a pure play. Every row shows the company's own description and its RevenueBase Smart Search rating so you can judge each match yourself. Read the full methodology: how the lists are built, how the judging worked, and what the figure means.
Ranking: Team size, largest first: companies are ordered by the number of professionals RevenueBase tracks at each one. Employee ranges shown are reported bands, for context.
Verification: Every listed company carries at least one verified work email, 1,214 across the full list. Contacts re-verify on a rolling cadence, and each contact's own verification date is shown inside RevenueBase.
Refresh: This page's figures were pulled from the company graph on September 11, 2026. Lists refresh periodically as the graph is re-checked.
Corrections: Wrong category, wrong headquarters, or a company that has closed? Use “Report an issue” on any row. Reports go to the RevenueBase Data Team and feed back into the company graph.

Derivatives law firms by metro in the United Kingdom

Derivatives law firms in London95

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names derivatives law firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many derivatives law firms are there based in London, United Kingdom?

RevenueBase identified 88 derivatives law firms headquartered in London, United Kingdom as of September 2026, matched on each company's own description of what it does rather than its industry code.

What is the largest company on this list?

Stewarts, headquartered in London, tops this list with the largest team on record.

Which city has the most derivatives law firms?

London leads with 95 headquartered companies, followed by Leeds (5) and Birmingham (5).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work the top results, verified emails and direct dials included. Upgrading unlocks all 1,214 verified decision-maker contacts tracked across these 88 companies.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 11, 2026.

Ready to reach these companies? Verified emails and direct dials for all 88 derivatives law firms based in London, United Kingdom. Start with a free account, no credit card.

Download this list →

Related lists

Derivatives law firms by geography

Browse the directory

About this data

RevenueBase is a B2B data infrastructure company. Its company graph covers 60 million companies and 398.9 million professional contacts, with emails verified on a rolling cadence rather than scraped once and left to decay. These company lists are generated directly from that graph with RevenueBase Smart Search, the same natural-language company search every RevenueBase user has: describe a market in plain words, get the companies that match, and add verified emails and direct dials for the people at them. It is the same data that powers RevenueBase's B2B data products, and a free account includes 500 credits to start. How these lists are built and judged.