Company lists · Data refreshed November 2026

Top 25 Union negotiation services based in the United States

RevenueBase identified 638 company matches for union negotiation services associated with the United States as of November 2026 and tracks 14,412 professional contacts across them, including 8,627 with verified work emails. New York is the largest hub.

This list covers company matches for union negotiation services 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 November 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 Nov 6, 2026 How this list was built
638Companies
14,412Contacts tracked
8,627Verified emails
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The 25 largest union negotiation services based in the United States

Ranked by team size
Top 25 of 638 company matches for union negotiation services based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 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 Nov 6, 20261,001-5,0002,724 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 · Nov 6, 2026 · View company records in RevenueBase
2Exact matchNew York, United StatesHQ recorded Nov 6, 20261,001-5,0002,515 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 · Nov 6, 2026 · View company records in RevenueBase
3Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 2026501-1,0001,626 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 2026201-500778 contacts →

Exact match

“FordHarrison LLP - your partner in employment law.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchChicago, WI, United StatesHQ recorded Nov 6, 2026201-500582 contacts →

Exact match

“Amundsen Davis is a law firm comprised of over 250 attorneys headquartered in Chicago.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact matchAtlanta, GA, United StatesHQ recorded Nov 6, 2026201-500449 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 · Nov 6, 2026 · View company records in RevenueBase
7Exact matchGrand Rapids, OH, United StatesHQ recorded Nov 6, 2026201-500366 contacts →

Exact match

“Miller Johnson was founded in 1959 and is committed to excellence in service to our business, institutional and individual clients.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchNew York, United StatesHQ recorded Nov 6, 202651-200220 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 · Nov 6, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202651-200162 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchBrookhaven, NY, United StatesHQ recorded Nov 6, 202651-200132 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 · Nov 6, 2026 · View company records in RevenueBase
11Exact matchNew Orleans, LA, United StatesHQ recorded Nov 6, 202651-200115 contacts →

Exact match

“Founded in 1995, Frilot L.L.C.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchSeattle, WA, United StatesHQ recorded Nov 6, 202651-200113 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 · Nov 6, 2026 · View company records in RevenueBase
13Exact matchChatham, CA, United StatesHQ recorded Nov 6, 202651-20089 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 · Nov 6, 2026 · View company records in RevenueBase
14Exact matchChicago, IL, United StatesHQ recorded Nov 6, 202651-20089 contacts →

Exact match

“Laner Muchin Ltd.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchPhiladelphia, PA, United StatesHQ recorded Nov 6, 202651-20079 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 · Nov 6, 2026 · View company records in RevenueBase
16Exact matchNew Orleans, LA, United StatesHQ recorded Nov 6, 202651-20057 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 · Nov 6, 2026 · View company records in RevenueBase
17Exact matchSyracuse, NY, United StatesHQ recorded Nov 6, 202611-5055 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 · Nov 6, 2026 · View company records in RevenueBase
18Exact matchSilver Spring, NV, United StatesHQ recorded Nov 6, 202611-5053 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 · Nov 6, 2026 · View company records in RevenueBase
19Exact matchEncino, CA, United StatesHQ recorded Nov 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 · Nov 6, 2026 · View company records in RevenueBase
20Exact matchColumbus, OH, United StatesHQ recorded Nov 6, 202611-5046 contacts →

Exact match

“Clemans Nelson is the preeminent public sector labor relations and human resource consulting firm in the state of Ohio.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchMilwaukee, WI, United StatesHQ recorded Nov 6, 202611-5045 contacts →

Exact match

“Lindner & Marsack is one of the nation's pre-eminent law firms specializing in labor and employment law.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchLake Barrington, IL, United StatesHQ recorded Nov 6, 202651-20045 contacts →

Exact match

“Welcome to Union One, a national advisory, brokerage, and technology firm serving labor unions.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchNew York, NY, United StatesHQ recorded Nov 6, 202611-5044 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 · Nov 6, 2026 · View company records in RevenueBase
24Exact matchCoral Gables, FL, United StatesHQ recorded Nov 6, 202651-20043 contacts →

Exact match

“Labor and Employment Law is all we do.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchNew York, United StatesHQ recorded Nov 6, 202611-5043 contacts →

Exact match

“Clifton Budd & DeMaria, LLP is one of the nation's first labor and employment law firms.”

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

Showing 25 of 638 union negotiation services based in the United States

See the full list, filter by size, metro and specialty, and access 8,627 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Union negotiation services based in the United States at a glance

As of Nov 6, 2026
59.9%Verified-email coverage
22.6Average contacts per company
1-10Median size (employees)
6.9%Largest-city concentration · New York
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
440
11-50
157
51-200
26
201-500
5
501-1,000
2
1,001-5,000
3

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 638 companies.

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 negotiation services” 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 8,627 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 November 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.

Union negotiation services by metro

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 negotiation services”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many union negotiation services are there based in the United States?

RevenueBase identified 638 company matches for union negotiation services associated with the United States as of November 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 negotiation services?

New York leads with 44 company records, followed by Los Angeles (22) and Chicago (21).

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 8,627 professional contacts with verified work emails tracked across these 638 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 November 6, 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.