Company lists · Data refreshed September 2026

Top 24 International business law firms based in the United States

Name: International business 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 4, 2026 10,903 companies tracked

RevenueBase identified 10,903 international business law firms headquartered in the United States as of September 2026 and tracks 351,427 professional contacts across them, including 187,340 with verified work emails and 166,291 with mobile numbers. New York is the largest hub.

This list covers international business 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 4, 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 4, 2026 86% judged on-target in blind review

10,903Companies

351,427Contacts tracked

187,340Verified emails

166,291Mobile numbers

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The 24 largest international business law firms based in the United States

Ranked by team size

Top 24 of 10,903 international business law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 4, 2026. Evidence rates how directly each company's own description names international business 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	Baker MckenzieIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	10001+	9,837
	“Baker McKenzie empowers clients to compete in the global economy.” Source: company website · checked Sep 4, 2026
2	Sidley Austin LLPPartial evidence	Chicago, TX, United StatesHQ checked Sep 4, 2026	1,001-5,000	5,122
	“Sidley is an elite global law firm.” Source: company website · checked Sep 4, 2026
3	Morgan, Lewis & Bockius LLPPartial evidence	Philadelphia, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	4,818
	“From our offices in strategic hubs of commerce, law, and government across North America, Asia, Europe, and the Middle East, we work with clients ranging from established, global…” Source: company website · checked Sep 4, 2026
4	Mayer BrownStrong evidence	Chicago, TX, United StatesHQ checked Sep 4, 2026	1,001-5,000	4,209
	“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 4, 2026
5	Simpson Thacher & Bartlett LLPStrong evidence	New York, NY, United StatesHQ checked Sep 4, 2026	1,001-5,000	3,409
	“Simpson Thacher & Bartlett LLP is one of the world’s leading international law firms.” Source: company website · checked Sep 4, 2026
6	Squire Patton BoggsPartial evidence	Cleveland, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	3,335
	“Squire Patton Boggs is a full service global law firm providing insight at the point where law, business and government meet, giving you a voice, supporting your ambitions and…” Source: company website · checked Sep 4, 2026
7	Cooley LLPIndirect evidence	Palo Alto, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	3,314
	“Clients partner with Cooley on transformative deals, complex IP and regulatory matters, and high-stakes litigation.” Source: company website · checked Sep 4, 2026
8	Despacho DE AbogadosIndirect evidence	Los Angeles, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	3,244
	“The Gold Group is a top producing team within Keller Williams Beverly Hills family.” Source: company website · checked Sep 4, 2026
9	Paul HastingsIndirect evidence	Worldwide, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	3,028
	“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 4, 2026
10	Gordon Rees Scully Mansukhani, LLPPartial evidence	San Francisco, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,807
	“As the only full-service law firm with offices and attorneys in all 50 states, Gordon Rees Scully Mansukhani delivers maximum value to our clients by combining the resources of a…” Source: company website · checked Sep 4, 2026
11	Davis Polk & Wardwell LLPPartial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,764
	“Davis Polk & Wardwell LLP (including its associated entities) is an elite global law firm with world-class practices across the board.” Source: company website · checked Sep 4, 2026
12	Perkins CoieIndirect evidence	Seattle, WI, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,734
	“Perkins Coie has combined with Ashurst to form Ashurst Perkins Coie.” Source: company website · checked Sep 4, 2026
13	Ogletree DeakinsPartial evidence	Atlanta, SC, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,716
	“Ogletree Deakins is one of the largest labor and employment law firms representing management in all types of employment-related legal matters.” Source: company website · checked Sep 4, 2026
14	Morrison FoersterIndirect evidence	San Francisco, DC, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,660
	“Morrison Foerster transforms complexity into advantage.” Source: company website · checked Sep 4, 2026
15	Paul, Weiss, Rifkind, Wharton & Garrison LLPPartial evidence	New York, NY, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,652
	“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 4, 2026
16	Husch BlackwellPartial evidence	20+ U.s. Offices, TX, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,516
	“Husch Blackwell is a different kind of law firm–structured around our clients’ industries and built on a culture of selfless service.” Source: company website · checked Sep 4, 2026
17	Cleary Gottlieb Steen & Hamilton LLPStrong evidence	New York, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,485
	“Cleary Gottlieb is a leading international law firm, with 14 offices located in major financial centers around the world, that has helped shape the globalization of the legal…” Source: company website · checked Sep 4, 2026
18	WilmerhaleStrong evidence	Washington, CO, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,329
	“Wilmer Cutler Pickering Hale and Dorr LLP (WilmerHale) is a leading international law firm with more than 1,200 lawyers located throughout 12 offices in the United States and…” Source: company website · checked Sep 4, 2026
19	Arnold & PorterIndirect evidence	Washington, DC, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,324
	“Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Source: company website · checked Sep 4, 2026
20	Winston & Strawn LLPIndirect evidence	Chicago, IL, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,197
	“On June 1, 2026, Winston & Strawn and Taylor Wessing’s U.K-led business officially launched as a single combined firm, creating Winston Taylor.” Source: company website · checked Sep 4, 2026
21	Sullivan & Cromwell LLPIndirect evidence	Manhattan, CA, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,181
	“Sullivan & Cromwell LLP provides the highest quality legal advice and representation to clients around the world.” Source: company website · checked Sep 4, 2026
22	Seyfarth Shaw LLPIndirect evidence	Chicago, NC, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,176
	“High stakes.” Source: company website · checked Sep 4, 2026
23	FOX RothschildIndirect evidence	Philadelphia, FL, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,161
	“With bold growth, Fox Rothschild brings together attorneys coast to coast.” Source: company website · checked Sep 4, 2026
24	BakerhostetlerPartial evidence	Washington, CO, United StatesHQ checked Sep 4, 2026	1,001-5,000	2,097
	“Recognized as one of the top firms for client service and quality of legal services, BakerHostetler is a leading law firm that helps clients around the world address their most…” Source: company website · checked Sep 4, 2026

Showing 24 of 10,903 international business law firms based in the United States

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International business law firms based in the United States at a glance

As of Sep 4, 2026

1-10Median size (employees)

New YorkLargest hub · 825 HQs

166,291Contacts with mobile numbers

Sep 4, 2026Data refreshed

Companies by employee count

1-10

6,913

11-50

2,852

51-200

761

201-500

165

501-1,000

1,001-5,000

5,001-10,000

10001+

Verified emails by last verification

0–30

31–60

16,391

61–90

99,408

90–180

70,577

180+

964

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 international business 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 “international business 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 international business 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, 187,340 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 4, 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.

International business law firms by metro

Frequently asked

How many international business law firms are there based in the United States?

RevenueBase identified 10,903 international business 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?

Baker Mckenzie, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most international business law firms?

New York leads with 825 headquartered companies, followed by Chicago (321) and Los Angeles (302).

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 187,340 verified decision-maker contacts tracked across these 10,903 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 4, 2026.

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International business law firms by geography

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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.