Company lists · Data refreshed September 2026

Top 25 Union compliance law firms worldwide

Name: Union compliance law firms worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 29, 2026 31,370 companies tracked

RevenueBase identified 31,370 company matches for union compliance law firms worldwide as of September 2026 and tracks 349,759 professional contacts across them, including 156,170 with verified work emails. The United States is the largest market and Sao Paulo the largest hub.

This list covers company matches for union compliance law firms worldwide, found by RevenueBase SmartSearch using the meaning of business descriptions in its company graph at Exact. Ranked by professionals tracked, largest first. Rows show recorded descriptions where available, Exact search membership and the snapshot date. Data refreshed September 29, 2026. Country and city lists for union compliance law firms follow the table.

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 RevenueBase SmartSearch · Exact Recorded Sep 29, 2026 How this list was built

31,370Companies

349,759Contacts tracked

156,170Verified emails

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The 25 largest union compliance law firms worldwide

Ranked by team size

Top 25 of 31,370 company matches for union compliance law firms worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 29, 2026. The RevenueBase SmartSearch column shows Exact match membership in this saved search. Click a contact count to view that company's people. Totals use company locations recorded by RevenueBase; the displayed preview is a smaller selection.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Lewis Brisbois	Exact match	Los Angeles, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	3,079 contacts →
	Exact match “Established in 1979, Lewis Brisbois Bisgaard & Smith LLP is a national, full-service law firm with more than 1,600 attorneys and 54 offices in 30 states and the District of…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
2	Ogletree Deakins	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,708 contacts →
	Exact match “Ogletree Deakins is one of the largest labor and employment law firms representing management in all types of employment-related legal matters.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
3	Littler	Exact match	San Francisco, CA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,555 contacts →
	Exact match “Littler is the largest global employment and labor law practice, representing management in all aspects of employment and labor law and serving as a single-source solution…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
4	Husch Blackwell	Exact match	20+ U.s. Offices, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,539 contacts →
	Exact match “Husch Blackwell is a different kind of law firm–structured around our clients’ industries and built on a culture of selfless service.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
5	Arnold & Porter	Exact match	Washington, DC, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,333 contacts →
	Exact match “Arnold & Porter combines sophisticated regulatory, litigation, and transactional capabilities to resolve clients’ most complex issues.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
6	Jackson Lewis P.C	Exact match	New York, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,285 contacts →
	Exact match “Focused on employment and labor law since 1958, Jackson Lewis P.C.’s attorneys located in major cities nationwide consistently identify and respond to new ways workplace law…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
7	Dechert LLP	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,041 contacts →
	Exact match “Dechert is the law firm that helps business leaders lead.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
8	Nelson Mullins Riley & Scarborough	Exact match	Columbia, SC, United StatesHQ recorded Sep 29, 2026	1,001-5,000	2,012 contacts →
	Exact match “Established in 1897, Nelson Mullins is an Am Law 100 firm of more than attorneys, policy advisors and professionals with 33 offices in 17 states and Washington, D.C.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
9	Taft Stettinius & Hollister LLP	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,980 contacts →
	Exact match “At Taft, we work as one team, driven and committed to helping you succeed.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
10	Venable LLP	Exact match	Washington, DC, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,790 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
11	Clayton UTZ	Exact match	Sydney, AustraliaHQ recorded Sep 29, 2026	1,001-5,000	1,787 contacts →
	Exact match “We are one of Australia's oldest and largest law firms, with offices in six cities, nearly 200 partners, and a full range of legal services for large private sector and government…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
12	Dinsmore & Shohl LLP	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,720 contacts →
	Exact match “Dinsmore & Shohl LLP has a nationwide team of more than 750 attorneys who are trusted advisers to Fortune 500 companies, institutions, associations, governments, professional…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
13	Ballard Spahr LLP	Exact match	Philadelphia, PA, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,682 contacts →
	Exact match “Ballard Spahr LLP, an Am Law 100 law firm with more than 750 lawyers in 19 U.S.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
14	Tozzinifreire Advogados	Exact match	São Paulo, BrazilHQ recorded Sep 29, 2026	1,001-5,000	1,580 contacts →
	Exact match “TozziniFreire is one of the leading legal services organizations in Latin America, operating in all areas of Business Law and with a significant track record in serving national…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
15	Blake, Cassels & Graydon LLP	Exact match	Toronto, ON, CanadaHQ recorded Sep 29, 2026	1,001-5,000	1,555 contacts →
	Exact match “At Blake, Cassels & Graydon LLP (Blakes), we serve a diverse national and international client base.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
16	Fisher Phillips	Exact match	Atlanta, GA, United StatesHQ recorded Sep 29, 2026	501-1,000	1,471 contacts →
	Exact match “With hundreds of attorneys across the globe, Fisher Phillips advises and advocates for employers internationally on some of the most complex and high-profile workplace matters.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
17	KIM & Chang	Exact match	Sajik-ro 8-gil, South KoreaHQ recorded Sep 29, 2026	1,001-5,000	1,451 contacts →
	Exact match “Kim & Chang is a globally recognized law firm based in Korea.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
18	Clark Hill LAW	Exact match	Detroit, MI, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,343 contacts →
	Exact match “At Clark Hill, our value proposition is simple.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
19	Quarles & Brady LLP	Exact match	Milwaukee, WI, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,318 contacts →
	Exact match “For over 125 years, Quarles & Brady LLP has provided quality legal services to a wide range of industries on a national stage.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
20	Snell & Wilmer	Exact match	Phoenix, AZ, United StatesHQ recorded Sep 29, 2026	501-1,000	1,219 contacts →
	Exact match “Founded in 1938, Snell & Wilmer is a full-service business law firm with more than 500 lawyers practicing in 17 locations throughout the United States and in Mexico.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
21	Steptoe LLP	Exact match	Washington, DC, United StatesHQ recorded Sep 29, 2026	1,001-5,000	1,207 contacts →
	Exact match “In more than 100 years of practice, Steptoe* has earned an international reputation for vigorous representation of clients before governmental agencies, successful advocacy in…” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
22	Jenner & Block	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	501-1,000	1,194 contacts →
	Exact match “At Jenner & Block, we shape what’s next through experience, vision, and judgment.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
23	Hinshaw & Culbertson LLP	Exact match	Chicago, IL, United StatesHQ recorded Sep 29, 2026	501-1,000	1,188 contacts →
	Exact match “Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
24	Stinson LLP	Exact match	500 Attorneys. 17 Locations Nationwide., MN, United StatesHQ recorded Sep 29, 2026	501-1,000	1,167 contacts →
	Exact match “Stinson LLP collaborates with clients ranging from individuals and privately held enterprises to national companies and international public corporations.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase
25	Taylor Rose	Exact match	London, United KingdomHQ recorded Sep 29, 2026	1,001-5,000	1,155 contacts →
	Exact match “Taylor Rose is a top 60 independent law firm with 1,700 experts operating nationwide and is recommended by the Legal 500 UK.” Recorded in the RevenueBase company graph · Sep 29, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “union compliance law firms”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 31,370 union compliance law firms worldwide

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Union compliance law firms worldwide at a glance

As of Sep 29, 2026

44.7%Verified-email coverage

11.1Average contacts per company

1-10Median size (employees)

3.7%Largest-city concentration · Sao Paulo

Sep 29, 2026Page data refreshed

Companies by employee count

1-10

21,579

11-50

7,827

51-200

1,392

201-500

220

501-1,000

1,001-5,000

5,001-10,000

10001+

Email recency is reported on each country list linked below.

How this list was built

The recorded descriptions help you assess these company matches. Check a company’s website for its current services and locations.

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.
Coverage: Every country. Country and city lists for union compliance law firms are linked below.
What qualifies: Company records worldwide whose business descriptions match “union compliance law firms” by meaning at the Exact setting. Descriptions are compiled in the RevenueBase company graph from public websites, profiles and company information where available; they are not guaranteed quotations from the company's website.
RevenueBase SmartSearch: Describe a niche company in your own words to find businesses by meaning. Exact, Similar, Related and Broad control the breadth of RevenueBase SmartSearch. This saved list uses Exact. Each row's Exact match badge shows inclusion in that search, not an individual score or a service-quality judgment.
Public preview: The public preview omits records without a verified work email. Dataset totals and geographic summaries describe the full matched records before these preview filters.
Match quality: RevenueBase's August 25, 2026 study assessed 4,198 description/company pairs across matching settings. The publisher reports 86% good or better at Exact. This evaluates the method across queries; it does not audit this individual list. Recorded company descriptions, where available, help you judge each match yourself. Read the full methodology: how the lists are built and what the study measures.
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 displayed company carries at least one verified work email. RevenueBase tracks 156,170 professional contacts with verified work emails across the full matched dataset. 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 29, 2026. Lists refresh periodically as the graph is re-checked.
Record context: Company records and descriptions can change. Check the company's website for its current services and locations.

Union compliance law firms by location

162 lists · largest first

Every Union compliance law firms list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

Frequently asked

What is RevenueBase SmartSearch?

RevenueBase SmartSearch finds niche companies by the meaning of their business descriptions in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit your description. This list uses Exact for “union compliance law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many union compliance law firms are there worldwide?

RevenueBase identified 31,370 company matches for union compliance law firms worldwide as of September 2026, using the meaning of business descriptions at Exact. This is the recorded matched set in the RevenueBase company graph.

What is the largest company on this list?

Lewis Brisbois tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which country has the most union compliance law firms?

The United States leads with 8,871 companies, followed by Brazil (5,670) and Spain (1,318). Every union compliance law firms list by country and city is linked on this page.

Which city has the most union compliance law firms?

Sao Paulo leads with 1151 company records, followed by Paris (534) and New York (446).

How do I get contact information for these companies?

A free RevenueBase account lets you run this exact search and work limited free results with 500 credits to start. Upgrading provides access to the 156,170 professional contacts with verified work emails tracked across these 31,370 companies; direct dials are available where recorded.

How current is this list?

The list refreshes periodically as the company graph is re-checked. This page's figures were pulled on September 29, 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.