Company lists · Data refreshed September 2026

Top 25 Employment litigation firms based in Chicago, United States

RevenueBase identified 417 employment litigation firms headquartered in Chicago, United States as of September 2026 and tracks 9,228 professional contacts across them, including 5,348 with verified work emails. New York is the largest hub.

This list covers employment litigation firms headquartered in Chicago, 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, its RevenueBase Smart Search rating, and when it was last checked. Data refreshed September 19, 2026.

Published by RevenueBase, a B2B data infrastructure company. This list was built with RevenueBase Smart Search, 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 RevenueBase Smart Search rating on every row Refreshed Sep 19, 2026 86% judged on-target in blind review
417Companies
9,228Contacts tracked
5,348Verified emails
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The 25 largest employment litigation firms based in Chicago, United States

Ranked by team size
Top 25 of 417 employment litigation firms based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 19, 2026. RevenueBase Smart Search rates how each company's information relates to employment litigation firms: strong evidence (its own description names it), partial (names part of it), indirect (matched on the rest of its profile rather than the description shown). Click a contact count to view that company's people.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Partial evidenceChicago, IL, United StatesHQ checked Sep 19, 2026501-1,000579 contacts →

Partial evidence

“As a national law firm defending corporations, non-profits, associations and their officers & directors in every manner of litigation, O'Hagan Meyer provides individualized…”

Source: RevenueBase Database · checked Sep 19, 2026
2Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 2026201-500542 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 19, 2026
3Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 2026501-1,000424 contacts →

Indirect evidence

“Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.”

Source: RevenueBase Database · checked Sep 19, 2026
4Partial evidenceChicago, IL, United StatesHQ checked Sep 19, 2026201-500311 contacts →

Partial evidence

“Keller Postman LLC is a national law firm that represents a broad array of clients as plaintiffs in complex litigation at the trial and appellate levels.”

Source: RevenueBase Database · checked Sep 19, 2026
5Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 2026201-500254 contacts →

Indirect evidence

“Swanson, Martin & Bell, LLP was founded in 1992 by a group of trial lawyers who left a large Chicago firm to better serve the needs of their clients.”

Source: RevenueBase Database · checked Sep 19, 2026
6Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200237 contacts →

Indirect evidence

“Tressler LLP is a national law firm headquartered in Chicago, with ten offices located in six states - California, Illinois, Missouri, New Jersey, New York and Pennsylvania.”

Source: RevenueBase Database · checked Sep 19, 2026
7Partial evidenceChicago, IL, United StatesHQ checked Sep 19, 2026201-500232 contacts →

Partial evidence

“Founded over 80 years ago, Clausen Miller represents businesses, insurers and professionals through strategic, cost-effective litigation and counseling across the nation and…”

Source: RevenueBase Database · checked Sep 19, 2026
8Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200203 contacts →

Indirect evidence

“We're Much.”

Source: RevenueBase Database · checked Sep 19, 2026
9Partial evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200186 contacts →

Partial evidence

“Cassiday Schade is a litigation law firm headquartered in Chicago, with national presence.”

Source: RevenueBase Database · checked Sep 19, 2026
10Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200182 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
11Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200171 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 19, 2026
12Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200158 contacts →

Indirect evidence

“DiCello Levitt LLP is one of the leading plaintiffs’ law firms in the United States.”

Source: RevenueBase Database · checked Sep 19, 2026
13Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200138 contacts →

Indirect evidence

“Nicolaides Fink Thorpe Michaelides Sullivan LLP is dedicated to serving the insurance industry throughout the world in evaluating and resolving their most complex risks.”

Source: RevenueBase Database · checked Sep 19, 2026
14Partial evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200132 contacts →

Partial evidence

“Wiedner & McAuliffe is a Chicago-based workers’ compensation defense and civil litigation firm.”

Source: RevenueBase Database · checked Sep 19, 2026
15Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200130 contacts →

Indirect evidence

“Delivering extraordinary results to leading companies and individuals in their most important matters.”

Source: RevenueBase Database · checked Sep 19, 2026
16Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200125 contacts →

Indirect evidence

“EDELSON PC is a law firm concentrating on high-stake’s plaintiff’s work ranging from class and mass actions to public client investigations and prosecutions.”

Source: RevenueBase Database · checked Sep 19, 2026
17Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-200102 contacts →

Indirect evidence

“Since its founding in 1929, Masuda Funai has focused its practice on successfully representing international and domestic companies entering, operating and expanding in the United…”

Source: RevenueBase Database · checked Sep 19, 2026
18Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20092 contacts →

Indirect evidence

“Since 1924, our family has continued a tradition begun by Jacob W.”

Source: RevenueBase Database · checked Sep 19, 2026
19Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20085 contacts →

Indirect evidence

“The Chicago injury lawyers at the Ankin Law, LLC are dedicated to helping victims recover for personal injury and workers compensation accidents.”

Source: RevenueBase Database · checked Sep 19, 2026
20Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202611-5082 contacts →

Indirect evidence

“The lawyers at Clifford Law Offices represent years of practice in the area of personal injury law including aviation, transportation, medical malpractice and product liability…”

Source: RevenueBase Database · checked Sep 19, 2026
21Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20080 contacts →

Indirect evidence

“We are trusted attorneys and trusted advisors to a wide range of employers, insurance carriers and third party administrators.”

Source: RevenueBase Database · checked Sep 19, 2026
22Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20079 contacts →

Indirect evidence

“Laner Muchin Ltd.”

Source: RevenueBase Database · checked Sep 19, 2026
23Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20078 contacts →

Indirect evidence

“Proven results.”

Source: RevenueBase Database · checked Sep 19, 2026
24Indirect evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20076 contacts →

Indirect evidence

“If you are searching for the highest level of skill and professional legal service, you have arrived at the right place.”

Source: RevenueBase Database · checked Sep 19, 2026
25Partial evidenceChicago, IL, United StatesHQ checked Sep 19, 202651-20075 contacts →

Partial evidence

“Aronberg Goldgehn is a premier full-service business law and litigation firm with offices in Chicago and Wheaton, Illinois.”

Source: RevenueBase Database · checked Sep 19, 2026

Showing 25 of 417 employment litigation firms based in Chicago, United States

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Employment litigation firms based in Chicago, United States at a glance

As of Sep 19, 2026
58.0%Verified-email coverage
22.1Average contacts per company
1-10Median size (employees)
180.8%Largest-city concentration · New York
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
241
11-50
118
51-200
50
201-500
5
501-1,000
2

Email recency for this list is measured across the whole United States list rather than for Chicago, so it is reported there. Company counts and contact totals on this page are exact for Chicago, over 417 companies.

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 employment litigation firms, so some rows will be adjacent to the category rather than pure plays. The description and RevenueBase Smart Search 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 Smart Search, the natural-language company search available to every RevenueBase user.
What qualifies
Companies headquartered in Chicago, United States whose own description of what they do matches “employment litigation firms”. Matching reads each company's description, not its industry code or its name.
RevenueBase Smart Search
RevenueBase Smart Search is how this list is assembled and how each row is rated. RevenueBase's data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to a category defined in a user's own words. Each row is rated strong evidence (its own description names employment litigation firms), partial evidence (it names part of the category) or indirect evidence (the description shown names none of it and the match rests on the rest of the company's profile). The description supporting each rating is quoted on the row.
What we exclude
Companies whose own description does not clearly place them among employment litigation firms, and records with no verified work email. Companies headquartered outside Chicago 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 its RevenueBase Smart Search 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, 5,348 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 19, 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.

Employment litigation firms by metro in the United States

Frequently asked

What is RevenueBase Smart Search?

RevenueBase Smart Search is how RevenueBase decides which companies belong on this list and how strongly each one fits. Its data engine and AI assess a company's LinkedIn profile, information supplied directly by the company, its website and other publicly available information, then relate it to the category the list is about. Each row is rated strong evidence when the company's own description names employment litigation firms, partial evidence when it names part of the category, and indirect evidence when the description shown names none of it and the match rests on the rest of the company's profile.

How many employment litigation firms are there based in Chicago, United States?

RevenueBase identified 417 employment litigation firms headquartered in Chicago, 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?

O'hagan Meyer, headquartered in Chicago, tops this list with the largest team on record.

Which city has the most employment litigation firms?

New York leads with 754 headquartered companies, followed by Los Angeles (609) and Chicago (417).

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 5,348 verified decision-maker contacts tracked across these 417 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 19, 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 Smart Search, 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.