Company lists · Data refreshed September 2026

Top 25 Mergers and acquisitions law firms based in London, United Kingdom

Name: Mergers and acquisitions 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 13, 2026 312 companies tracked

RevenueBase identified 312 mergers and acquisitions law firms headquartered in London, United Kingdom as of September 2026 and tracks 13,756 professional contacts across them, including 6,688 with verified work emails and 970 with mobile numbers. Across the United Kingdom, London is the largest hub for this category.

This list covers mergers and acquisitions 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 13, 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 13, 2026 86% judged on-target in blind review

312Companies

13,756Contacts tracked

6,688Verified emails

970Mobile numbers

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The 25 largest mergers and acquisitions law firms based in London, United Kingdom

Ranked by team size

Top 25 of 312 mergers and acquisitions law firms based in London, United Kingdom, ranked by team size, largest first. Data refreshed Sep 13, 2026. RevenueBase Smart Search rates how each company's information relates to mergers and acquisitions 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	Freshfields	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	5,001-10,000	6,487 contacts →
	Partial evidence “Freshfields is a global firm with over 280 years’ experience of anticipating change, setting new standards and shaping the future of law.” Source: RevenueBase Database · checked Sep 13, 2026
2	Slaughter And MAY	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	1,001-5,000	1,951 contacts →
	Partial evidence “Slaughter and May is regarded as one of the most prestigious law firms in the world.” Source: RevenueBase Database · checked Sep 13, 2026
3	Farrer & CO	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	693 contacts →
	Indirect evidence “Farrer & Co is synonymous with the highest quality legal advice and service.” Source: RevenueBase Database · checked Sep 13, 2026
4	Howard Kennedy LLP	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	460 contacts →
	Partial evidence “We are a London based, full-service law firm, specialising in providing straightforward advice to ambitious clients ranging from entrepreneurial businesses, family offices and…” Source: RevenueBase Database · checked Sep 13, 2026
5	Clearwater	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	384 contacts →
	Indirect evidence “Clearwater is an independent corporate finance house focused on unlocking the latent potential in every business.” Source: RevenueBase Database · checked Sep 13, 2026
6	Berwin Leighton Paisner	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	1,001-5,000	362 contacts →
	Indirect evidence “Berwin Leighton Paisner and Bryan Cave have combined to form Bryan Cave Leighton Paisner LLP.” Source: RevenueBase Database · checked Sep 13, 2026
7	Bristows	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	354 contacts →
	Indirect evidence “We are a European headquartered hub for litigation, transactions and advice throughout the world and have remained fiercely independent since we first began in 1837.” Source: RevenueBase Database · checked Sep 13, 2026
8	Quantuma	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	277 contacts →
	Indirect evidence “Quantuma is a leading business advisory firm which works with businesses at the key milestones.” Source: RevenueBase Database · checked Sep 13, 2026
9	FOX Williams	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
10	Oury Clark	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	171 contacts →
	Indirect evidence “Our pioneering integrated approach to professional services cuts through the complicated layers of the legal and accountancy world to give you straightforward joined-up advice and…” Source: RevenueBase Database · checked Sep 13, 2026
11	Marriott Harrison	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	114 contacts →
	Indirect evidence “Marriott Harrison is a legal transactional and advisory firm, best known for its market-leading work alongside insightful investors and ambitious companies who build, evolve, and…” Source: RevenueBase Database · checked Sep 13, 2026
12	Hunters LAW LLP	Indirect evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
13	Trinity International	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	79 contacts →
	Partial evidence “Trinity International LLP is a niche project and corporate finance law firm focusing on energy, infrastructure, resources and industry with offices in London, Paris, Washington DC…” Source: RevenueBase Database · checked Sep 13, 2026
14	SI Global	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	79 contacts →
	Indirect evidence “We are SI Global.” Source: RevenueBase Database · checked Sep 13, 2026
15	K&l Gates LLP	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	63 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 13, 2026
16	Arrowpoint Advisory	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	48 contacts →
	Indirect evidence “Arrowpoint Advisory is the dedicated mid-market advisory team of Rothschild & Co in the UK.” Source: RevenueBase Database · checked Sep 13, 2026
17	Mintz, Levin, Cohn, Ferris, Glovsky And Popeo, P.C	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	201-500	46 contacts →
	Indirect evidence “MINTZ, LEVIN, COHN, FERRIS, GLOVSKY AND POPEO LLP is a company based out of NEW BROAD STREET HOUSE 35 NEW BROAD STREET, LONDON, United Kingdom.” Source: RevenueBase Database · checked Sep 13, 2026
18	JP Legal	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	46 contacts →
	Partial evidence “J&P Legal is a regional law firm advising clients on a wide range of Corporate and Commercial matters.” Source: RevenueBase Database · checked Sep 13, 2026
19	Rosling King LLP	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
20	Memery Crystal	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	51-200	43 contacts →
	Partial evidence “Memery Crystal is a multi-disciplinary law firm with a reputation for providing high-quality commercial advice.” Source: RevenueBase Database · checked Sep 13, 2026
21	EOS Deal Advisory	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	42 contacts →
	Indirect evidence “At EOS Deal Advisory, our focus is to provide our clients with targeted advice that focusses on driving future value, leverages evolving technologies, and ensures operational…” Source: RevenueBase Database · checked Sep 13, 2026
22	Rosenblatt LAW	Partial evidence	London, United KingdomHQ checked Sep 13, 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 13, 2026
23	Ingram Winter Green LLP	Partial evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	36 contacts →
	Partial evidence “London City Law Firm.” Source: RevenueBase Database · checked Sep 13, 2026
24	Pharmaventures	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	11-50	33 contacts →
	Indirect evidence “PharmaVentures is a global leader in life sciences dealmaking-spanning M&A, licensing, valuation and strategy.” Source: RevenueBase Database · checked Sep 13, 2026
25	DD Consulting	Indirect evidence	London, United KingdomHQ checked Sep 13, 2026	n/a	32 contacts →
	Indirect evidence “DD Consulting is a boutique consulting house specialising in M&A, integration and separation, taking all those skills into day-to-day business operations.” Source: RevenueBase Database · checked Sep 13, 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: mergers and acquisitions 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 mergers and acquisitions law firms.
Partial evidence: Its own public description names part of mergers and acquisitions law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name mergers and acquisitions 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 312 mergers and acquisitions law firms based in London, United Kingdom

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Mergers and acquisitions law firms based in London, United Kingdom at a glance

As of Sep 13, 2026

48.6%Verified-email coverage

7.1%Mobile-number coverage

44.1Average contacts per company

1-10Median size (employees)

Sep 13, 2026Page data refreshed

Companies by employee count

1-10

189

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Freshness & accuracy

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

Email last verified

Median 16.0d

5,3100–30

1,30131–60

3861–90

290–180

37180+

Company record updated

Median 65.0d

00–30

6,45131–60

5,18161–90

1,29690–180

828180+

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 mergers and acquisitions 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 “mergers and acquisitions 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 mergers and acquisitions 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 mergers and acquisitions 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, 6,688 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 13, 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 mergers and acquisitions 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 mergers and acquisitions law firms are there based in London, United Kingdom?

RevenueBase identified 312 mergers and acquisitions 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?

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

Which city in the United Kingdom has the most mergers and acquisitions law firms?

London leads the United Kingdom with 312 headquartered companies, followed by Birmingham (11) and Bristol (11).

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 6,688 verified decision-maker contacts tracked across these 312 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 13, 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.