Company lists · Data refreshed September 2026

Top 25 Financial regulation law firms based in London, United Kingdom

Name: Financial regulation 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 28, 2026 50 companies tracked

RevenueBase identified 50 financial regulation law firms headquartered in London, United Kingdom as of September 2026 and tracks 642 professional contacts across them, including 373 with verified work emails. Across the United Kingdom, London is the largest hub for this category.

This list covers financial regulation 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 28, 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 28, 2026 86% judged on-target in blind review

50Companies

642Contacts tracked

373Verified emails

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The 25 largest financial regulation law firms based in London, United Kingdom

Ranked by team size

Top 25 of 50 financial regulation law firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to financial regulation 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	FOX Williams	Partial evidence	London, United KingdomHQ checked Sep 28, 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 28, 2026
2	Novatus	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	102 contacts →
	Partial evidence “We enable financial services firms to meet their most complex regulatory requirements through specialist technology and expert-led advisory services.” Source: RevenueBase Database · checked Sep 28, 2026
3	Rosling King LLP	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	45 contacts →
	Strong 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 28, 2026
4	Complyport	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	51-200	36 contacts →
	Indirect evidence “Welcome to Complyport - member of ComplyMAP Group!” Source: RevenueBase Database · checked Sep 28, 2026
5	RQC Group	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	34 contacts →
	Partial evidence “RQC Group is an industry-leading financial compliance consultancy with offices in London and New York, specialising in FCA, SEC and CFTC/NFA Compliance Consulting, Investment…” Source: RevenueBase Database · checked Sep 28, 2026
6	Bark&co	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	28 contacts →
	Strong evidence “Bark & co Solicitors is an established and dynamic City of London based law firm with over 40 legal practitioners specialising in a range of areas including business regulation…” Source: RevenueBase Database · checked Sep 28, 2026
7	Mayer Brown International LLP	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	27 contacts →
	Strong 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 28, 2026
8	Fintech Harbor Consulting LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	16 contacts →
	Partial evidence “Fintech Harbor Consulting is a leading consulting firm that provides services in the spheres of taxation, financial consultancy, business incorporation, and support and…” Source: RevenueBase Database · checked Sep 28, 2026
9	MAP Risk Management Services MAP RMS	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	10 contacts →
	Strong evidence “MAP RMS, part of Complyport, provides specialised risk management and prudential regulation services tailored to financial services firms, including investment firms, AIFs…” Source: RevenueBase Database · checked Sep 28, 2026
10	Richdale Consultants	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	7 contacts →
	Indirect evidence “Richdale Consultants was established over four years ago with a commitment at the heart of the business.” Source: RevenueBase Database · checked Sep 28, 2026
11	Delfinus LLP	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Private and independent corporate finance advisory firm focused on financial institutions.” Source: RevenueBase Database · checked Sep 28, 2026
12	Skadi Limited	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	6 contacts →
	Partial evidence “Founded in 2012, SKADI is focused on Business Integrity within the Financial Industry.” Source: RevenueBase Database · checked Sep 28, 2026
13	Trancura Legal	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Indirect evidence “Trancura Legal is an international legal consultancy headquartered in London.” Source: RevenueBase Database · checked Sep 28, 2026
14	Radix Legal & Consulting LTD	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	5 contacts →
	Partial evidence “Radix Legal and Consulting Ltd (RLC) is a client focused and business orientated law firm providing legal advisory, transactional support, consulting and training services to…” Source: RevenueBase Database · checked Sep 28, 2026
15	Creed Solicitors	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Indirect evidence “Creed Solicitors was established in 2015 by Richard Creed.” Source: RevenueBase Database · checked Sep 28, 2026
16	Temple Consulting Limited	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Strong evidence “We are a consultancy of experts in UK and EU financial regulation.” Source: RevenueBase Database · checked Sep 28, 2026
17	Temple Square Chambers	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	4 contacts →
	Strong evidence “Temple Square Chambers specialises in UK, EU and international institutional and retail financial regulation and dispute resolution.” Source: RevenueBase Database · checked Sep 28, 2026
18	C&g Regulatory Solutions	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Strong evidence “Founded in 2021 by industry veteran Alexander Culley as A.C.Culley & Co, C&G Regulatory Solutions Limited, trading as C&G, offers deep experience of financial markets regulation…” Source: RevenueBase Database · checked Sep 28, 2026
19	Banfin	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial evidence “Law for Finance transformed with BanFin.” Source: RevenueBase Database · checked Sep 28, 2026
20	Rosediem Consulting	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	11-50	3 contacts →
	Partial evidence “Awarded Best Specialist Financial Regulatory Firm 2022!” Source: RevenueBase Database · checked Sep 28, 2026
21	Apeiro Advisory & Business Solutions	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	3 contacts →
	Partial evidence “Financial Services Advisory That Delivers Measurable Results Apeiro is a professional services firm specialising in advisory, consulting, and assurance, partnering with financial…” Source: RevenueBase Database · checked Sep 28, 2026
22	Mcdonnell Ellis LLP	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	2 contacts →
	Strong evidence “We are the only specialist financial services law firm in the UK.” Source: RevenueBase Database · checked Sep 28, 2026
23	Harold & Mccormack LAW	Partial evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Partial evidence “Harold & McCormack Law is a boutique regulatory defence firm founded by solicitor Ashleigh Harold, who brings over 25 years’ experience supporting professionals, directors, and…” Source: RevenueBase Database · checked Sep 28, 2026
24	Trading Compliance Limited	Indirect evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Indirect evidence “Trading Compliance Limited (Trading Compliance) has been advising firms on regulatory compliance since 1997.” Source: RevenueBase Database · checked Sep 28, 2026
25	Huntley Legal	Strong evidence	London, United KingdomHQ checked Sep 28, 2026	1-10	1 contacts →
	Strong evidence “We are a competitively priced, client-focused firm specialising in commercial, financial services and insurance sector law.” Source: RevenueBase Database · checked Sep 28, 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: financial regulation 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 financial regulation law firms.
Partial evidence: Its own public description names part of financial regulation law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name financial regulation 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 50 financial regulation law firms based in London, United Kingdom

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Financial regulation law firms based in London, United Kingdom at a glance

As of Sep 28, 2026

58.1%Verified-email coverage

12.8Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

Email recency for this list is measured across the whole United Kingdom list rather than for London, so it is reported there. Company counts and contact totals on this page are exact for London, over 50 companies.

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 financial regulation 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 “financial regulation 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 financial regulation 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 financial regulation 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, 373 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 28, 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.

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 financial regulation 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 financial regulation law firms are there based in London, United Kingdom?

RevenueBase identified 50 financial regulation 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?

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

Which city in the United Kingdom has the most financial regulation law firms?

London leads the United Kingdom with 50 headquartered companies, followed by London London (2) and Alloa (1).

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 373 verified decision-maker contacts tracked across these 50 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 28, 2026.

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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.