Company lists · Data refreshed September 2026

Top 25 Union representation law firms based in the United States

RevenueBase identified 748 company matches for union representation law firms associated with the United States as of September 2026 and tracks 11,816 professional contacts across them, including 6,915 with verified work emails and 6,311 with mobile numbers. Los Angeles is the largest hub.

This list covers company matches for union representation law firms associated with the United States, 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 6, 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 RevenueBase SmartSearch · Exact Recorded Sep 6, 2026 How this list was built
748Companies
11,816Contacts tracked
6,915Verified emails
6,311Mobile numbers
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The 25 largest union representation law firms based in the United States

Ranked by team size
Top 25 of 748 company matches for union representation law firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 6, 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.
#CompanyRevenueBase SmartSearchHeadquartersEmployeesContacts
1Exact matchSan Francisco, CA, United StatesHQ recorded Sep 6, 20261,001-5,0002,555 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 6, 2026 · View company records in RevenueBase
2Exact matchNew York, United StatesHQ recorded Sep 6, 20261,001-5,0002,285 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 6, 2026 · View company records in RevenueBase
3Exact matchAtlanta, GA, United StatesHQ recorded Sep 6, 2026201-500746 contacts →

Exact match

“FordHarrison LLP - your partner in employment law.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
4Exact matchAtlanta, GA, United StatesHQ recorded Sep 6, 2026201-500429 contacts →

Exact match

“Constangy, Brooks, Smith & Prophete has more than 250 attorneys across 21 states and the District of Columbia, offering services including the defense of single and…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
5Exact matchNew York, United StatesHQ recorded Sep 6, 202651-200194 contacts →

Exact match

“DC 37’s Health and Security benefit package includes the largest prepaid legal services office in the country.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
6Exact matchNew York, NY, United StatesHQ recorded Sep 6, 202651-200150 contacts →

Exact match

“Outten & Golden is a nationally recognized law firm for employees.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
7Exact matchBrookhaven, GA, United StatesHQ recorded Sep 6, 202651-200119 contacts →

Exact match

“Martenson, Hasbrouck & Simon LLP is headquartered in Atlanta, with offices in Carlsbad, Chicago, Dallas, New York, and Sacramento, making us geographically and strategically…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
8Exact matchNew Orleans, LA, United StatesHQ recorded Sep 6, 202651-200113 contacts →

Exact match

“Founded in 1995, Frilot L.L.C.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
9Exact matchSeattle, WA, United StatesHQ recorded Sep 6, 202651-200100 contacts →

Exact match

“HKM is a national employment law firm that represents individuals and workers in all aspects of employment law.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
10Exact matchChatham, NJ, United StatesHQ recorded Sep 6, 202651-20080 contacts →

Exact match

“TEAMING WITH EMPLOYERS TO BUILD A BETTER WORKPLACE® We are a different kind of law firm.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
11Exact matchPhiladelphia, PA, United StatesHQ recorded Sep 6, 202651-20080 contacts →

Exact match

“Willig, Williams & Davidson is one of the largest and most respected union-side labor law firms in the United States.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
12Exact matchChicago, IL, United StatesHQ recorded Sep 6, 202651-20079 contacts →

Exact match

“Laner Muchin Ltd.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
13Exact matchMinneapolis, MN, United StatesHQ recorded Sep 6, 202651-20078 contacts →

Exact match

“Nichols Kaster, with more than thirty lawyers in offices in Minneapolis and San Francisco, represents employees and consumers in individual, class, and collective action lawsuits…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
14Exact matchChicago, IL, United StatesHQ recorded Sep 6, 202651-20073 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
15Exact matchMilwaukee, WI, United StatesHQ recorded Sep 6, 202611-5070 contacts →

Exact match

“At Hawks Quindel, we achieve results for working people.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
16Exact matchSyracuse, NY, United StatesHQ recorded Sep 6, 202611-5054 contacts →

Exact match

“Blitman & King LLP is a law firm with a national reputation for providing cutting edge practical advice in complicated areas of the law.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
17Exact matchEncino, CA, United StatesHQ recorded Sep 6, 202611-5050 contacts →

Exact match

“Ballard Rosenberg Golper & Savitt, LLP is an A-V rated law firm engaged exclusively in the practice of labor and employment law on behalf of employers and management.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
18Exact matchWashington, DC, United StatesHQ recorded Sep 6, 202611-5049 contacts →

Exact match

“Bredhoff & Kaiser PLLC is one of the nation’s preeminent law firms devoted to empowering workers and the institutions that advocate for them.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
19Exact matchMilwakee, WI, United StatesHQ recorded Sep 6, 202611-5049 contacts →

Exact match

“The American legal system is in a constant state of change.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
20Exact matchSilver Spring, MD, United StatesHQ recorded Sep 6, 202611-5047 contacts →

Exact match

“Gilbert Employment Law (GEL) has a vibrant employment law practice with offices in Silver Spring, MD and Honolulu, Hawaii representing employees and employers in a variety of…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
21Exact matchNew Orleans, LA, United StatesHQ recorded Sep 6, 202651-20047 contacts →

Exact match

“Whether vigorously protecting your business and reputation from wrongful accusations or tackling other complex labor & employment issues nationwide, Kullman brings powerful…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
22Exact matchWestlake Village, CA, United StatesHQ recorded Sep 6, 202651-20043 contacts →

Exact match

“Ferrone Law Group is California's preeminent law firm specializing exclusively in the representation of public safety associations and their members in labor & contract…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
23Exact matchWashington, DC, United StatesHQ recorded Sep 6, 202611-5042 contacts →

Exact match

“The lawyers of Katz Banks Kumin are nationally recognized leaders in the areas of whistleblower law, discrimination and sexual harassment law, wage and hour law, employment law…”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
24Exact matchCoral Gables, FL, United StatesHQ recorded Sep 6, 202651-20042 contacts →

Exact match

“Labor and Employment Law is all we do.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase
25Exact matchNew York, NY, United StatesHQ recorded Sep 6, 202611-5039 contacts →

Exact match

“At Cohen, Weiss and Simon LLP, we are proud of our reputation as one of the nation's leading firms devoted exclusively to the interests of labor and working people.”

Recorded in the RevenueBase company graph · Sep 6, 2026 · View company records in RevenueBase

Showing 25 of 748 union representation law firms based in the United States

See the full list, filter by size, metro and specialty, and access 6,915 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Union representation law firms based in the United States at a glance

As of Sep 6, 2026
58.5%Verified-email coverage
53.4%Mobile-number coverage
15.8Average contacts per company
1-10Median size (employees)
7.1%Largest-city concentration · Los Angeles
Sep 6, 2026Page data refreshed

Companies by employee count

1-10
496
11-50
210
51-200
34
201-500
3
1,001-5,000
2

Freshness & accuracy

How recently the business emails on this list were verified

Email last verified

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.
What qualifies
Company records associated with the United States whose business descriptions match “union representation 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 6,915 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 6, 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.

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 representation law firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many union representation law firms are there based in the United States?

RevenueBase identified 748 company matches for union representation law firms associated with the United States 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?

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

Which city has the most union representation law firms?

Los Angeles leads with 53 company records, followed by New York (53) and Washington (24).

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 6,915 professional contacts with verified work emails tracked across these 748 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 6, 2026.

Ready to reach these companies? Verified emails and direct dials for all 748 union representation law firms based in the United States. Start with a free account, no credit card.

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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.