Company lists · Data refreshed September 2026

Top 25 Mergers and acquisitions law firms based in the United States

Name: Mergers and acquisitions law firms based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 5, 2026 3,641 companies tracked

RevenueBase identified 3,641 mergers and acquisitions law firms headquartered in the United States as of September 2026 and tracks 155,123 professional contacts across them, including 88,366 with verified work emails and 76,672 with mobile numbers. New York is the largest hub.

This list covers mergers and acquisitions law firms headquartered in the United States, 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase SmartSearch, 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 Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review

3,641Companies

155,123Contacts tracked

88,366Verified emails

76,672Mobile numbers

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The 25 largest mergers and acquisitions law firms based in the United States

Ranked by team size

Top 25 of 3,641 mergers and acquisitions law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names mergers and acquisitions law firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#	Company	Headquarters	Employees	Contacts
1	Kirkland & EllisPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	5,001-10,000	8,449
	“As one of the world’s leading law firms, we serve a broad range of clients with market-leading practices in private equity, M&A and other complex corporate transactions…” Source: company website · checked Sep 5, 2026
2	White & Case LLPPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	7,485
	“White & Case is a global law firm with longstanding offices in the markets that matter today.” Source: company website · checked Sep 5, 2026
3	Skadden, Arps, Slate, Meagher & Flom LLP And AffiliatesIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	4,540
	“Skadden, Arps, Slate, Meagher & Flom LLP and Affiliates delivers the highest quality advice and novel solutions to legal challenges, enabling clients to achieve their business…” Source: company website · checked Sep 5, 2026
4	Mayer BrownPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	1,001-5,000	4,177
	“Mayer Brown is a leading international law firm, positioned to represent the world’s major corporations, funds and financial institutions in their most important and complex…” Source: company website · checked Sep 5, 2026
5	Gibson DunnPartial evidence	Los Angeles, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,735
	“Gibson Dunn is a leading global law firm, advising clients on significant transactions and disputes.” Source: company website · checked Sep 5, 2026
6	Cooley LLPIndirect evidence	Palo Alto, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,341
	“Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation.” Source: company website · checked Sep 5, 2026
7	Paul HastingsStrong evidence	Los Angeles, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	3,045
	“With widely recognized elite teams in finance, mergers & acquisitions, private equity, restructuring and special situations, litigation, employment and real estate, Paul Hastings…” Source: company website · checked Sep 5, 2026
8	Morrison FoersterIndirect evidence	San Francisco, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,667
	“Morrison Foerster transforms complexity into advantage.” Source: company website · checked Sep 5, 2026
9	Paul, Weiss, Rifkind, Wharton & Garrison LLPPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,577
	“Paul, Weiss, Rifkind, Wharton & Garrison LLP is a global law firm of more than 1,500 lawyers focused on helping clients navigate their most complex legal and business challenges.” Source: company website · checked Sep 5, 2026
10	Akin Gump Strauss Hauer & Feld LLPPartial evidence	Washington, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,454
	“Akin is a global law firm with more than 1,100 lawyers and advisors who pride themselves on dedication to their clients and their communities.” Source: company website · checked Sep 5, 2026
11	Arnold & PorterIndirect evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,333
	“Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: company website · checked Sep 5, 2026
12	Seyfarth Shaw LLPIndirect evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,167
	“High stakes.” Source: company website · checked Sep 5, 2026
13	Wilson Sonsini Goodrich & RosatiIndirect evidence	Palo Alto, CA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,092
	“Wilson Sonsini Goodrich & Rosati is the premier legal advisor to technology, life sciences, and other growth enterprises worldwide.” Source: company website · checked Sep 5, 2026
14	Dechert LLPPartial evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	2,041
	“Dechert is the law firm that helps business leaders lead.” Source: company website · checked Sep 5, 2026
15	Pillsbury Winthrop Shaw Pittman LLPPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,949
	“Pillsbury is one of the world’s foremost law firms, operating at the intersection of technology innovation, capital and government.” Source: company website · checked Sep 5, 2026
16	Troutman Pepper Locke LLPIndirect evidence	United StatesHQ checked Sep 5, 2026	1,001-5,000	1,895
	“Troutman Pepper Locke LLP helps clients solve complex legal challenges and achieve their business goals in an ever-changing global economy.” Source: company website · checked Sep 5, 2026
17	Faegre DrinkerIndirect evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,848
	“Faegre Drinker is a firm designed for clients.” Source: company website · checked Sep 5, 2026
18	Venable LLPPartial evidence	Washington, DC, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,790
	“Committed to Your Success – As a law firm of more than 900 professionals, Venable delivers legal services globally in every area of regulatory compliance, government affairs…” Source: company website · checked Sep 5, 2026
19	Vinson & ElkinsPartial evidence	Houston, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,693
	“Vinson & Elkins is a law firm of global distinction, working with leading companies on wide-ranging matters in key industries across the economy.” Source: company website · checked Sep 5, 2026
20	Ballard Spahr LLPPartial evidence	Philadelphia, PA, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,682
	“Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.” Source: company website · checked Sep 5, 2026
21	Milbank LLPPartial evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	1,640
	“Milbank is a premier international law firm handling high-profile, complex cases and business transactions through 11 offices worldwide.” Source: company website · checked Sep 5, 2026
22	Dorsey & Whitney LLPPartial evidence	Minneapolis, MN, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,599
	“Clients have relied on the international law firm of Dorsey & Whitney LLP since 1912 as a trusted legal advisor and valued business partner.” Source: company website · checked Sep 5, 2026
23	Fried FrankIndirect evidence	New York, NY, United StatesHQ checked Sep 5, 2026	501-1,000	1,584
	“Fried, Frank, Harris, Shriver & Jacobson LLP advises the world's leading corporations, investment funds and financial institutions on their most critical legal needs and business…” Source: company website · checked Sep 5, 2026
24	Haynes And Boone, LLPPartial evidence	Dallas, TX, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,558
	“Haynes Boone is among the fastest-growing firms in the Am Law 100, providing full-service counsel across sectors, including corporate, energy, financial services, real estate…” Source: company website · checked Sep 5, 2026
25	Katten Muchin Rosenman LLPPartial evidence	Chicago, IL, United StatesHQ checked Sep 5, 2026	1,001-5,000	1,495
	“Katten is a full-service law firm with nearly 650 attorneys in locations across the United States and in London and Shanghai.” Source: company website · checked Sep 5, 2026

Showing 25 of 3,641 mergers and acquisitions law firms based in the United States

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Mergers and acquisitions law firms based in the United States at a glance

As of Sep 5, 2026

1-10Median size (employees)

New YorkLargest hub · 325 HQs

76,672Contacts with mobile numbers

Sep 5, 2026Data refreshed

Companies by employee count

1-10

2,340

11-50

926

51-200

225

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

82,211

31–60

5,560

61–90

90–180

180+

464

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 evidence 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 SmartSearch, the natural-language company search available to every RevenueBase user.
What qualifies: Companies headquartered in the United States 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.
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 United States 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 an evidence 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, 88,366 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 5, 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.

Mergers and acquisitions law firms by metro

Frequently asked

How many mergers and acquisitions law firms are there based in the United States?

RevenueBase identified 3,641 mergers and acquisitions law firms headquartered in the United States 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?

Kirkland & Ellis, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most mergers and acquisitions law firms?

New York leads with 325 headquartered companies, followed by Chicago (126) and Los Angeles (112).

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 88,366 verified decision-maker contacts tracked across these 3,641 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 5, 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 SmartSearch, 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.