Company lists · Data refreshed September 2026

Top 25 Insurance regulatory law firms based in Chicago, United States

Name: Insurance regulatory law firms based in Chicago, United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 28, 2026 187 companies tracked

RevenueBase identified 187 insurance regulatory law firms headquartered in Chicago, United States as of September 2026 and tracks 6,475 professional contacts across them, including 3,539 with verified work emails. Across the United States, New York is the largest hub for this category (241 companies); Chicago follows with 187.

This list covers insurance regulatory law 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 28, 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 28, 2026 86% judged on-target in blind review

187Companies

6,475Contacts tracked

3,539Verified emails

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The 25 largest insurance regulatory law firms based in Chicago, United States

Ranked by team size

Top 25 of 187 insurance regulatory law firms based in Chicago, United States, ranked by team size, largest first. Data refreshed Sep 28, 2026. RevenueBase Smart Search rates how each company's information relates to insurance regulatory law 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.
#	Company	RevenueBase Smart Search	Headquarters	Employees	Contacts
1	Hinshaw & Culbertson LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	1,188 contacts →
	Partial evidence “Hinshaw & Culbertson LLP is a U.S-based law firm with offices nationwide.” Source: RevenueBase Database · checked Sep 28, 2026
2	O'hagan Meyer	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	579 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 28, 2026
3	Litchfield Cavo LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	501-1,000	424 contacts →
	Partial evidence “Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.” Source: RevenueBase Database · checked Sep 28, 2026
4	Swanson, Martin & Bell, LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	254 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 28, 2026
5	Tressler LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	237 contacts →
	Partial 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 28, 2026
6	Clausen Miller P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	201-500	232 contacts →
	Indirect 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 28, 2026
7	Chuhak & Tecson, P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	150 contacts →
	Indirect evidence “Chuhak & Tecson offers more than just solutions.” Source: RevenueBase Database · checked Sep 28, 2026
8	Nicolaides Fink Thorpe Michaelides Sullivan LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	138 contacts →
	Partial 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 28, 2026
9	Wiedner & Mcauliffe, LTD	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	132 contacts →
	Indirect evidence “Wiedner & McAuliffe is a Chicago-based workers’ compensation defense and civil litigation firm.” Source: RevenueBase Database · checked Sep 28, 2026
10	Masuda Funai	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	102 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 28, 2026
11	Batescarey LLP	Strong evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	101 contacts →
	Strong evidence “BatesCarey LLP has dedicated its practice to protecting the interests of insurers and reinsurers while shaping the trends of insurance law throughout the United States and abroad.” Source: RevenueBase Database · checked Sep 28, 2026
12	Foran Glennon Palandech Ponzi & Rudloff	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	100 contacts →
	Indirect evidence “Since 2001, Foran Glennon has provided sophisticated legal services in a cost-effective manner.” Source: RevenueBase Database · checked Sep 28, 2026
13	Horwitz, Horwitz & Associates	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	92 contacts →
	Indirect evidence “Since 1924, our family has continued a tradition begun by Jacob W.” Source: RevenueBase Database · checked Sep 28, 2026
14	Nyhan, Bambrick, Kinzie, & Lowry	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	80 contacts →
	Partial 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 28, 2026
15	Pretzel & Stouffer, Chartered	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	78 contacts →
	Indirect evidence “Proven results.” Source: RevenueBase Database · checked Sep 28, 2026
16	Aronberg Goldgehn	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	75 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 28, 2026
17	Robbins Schwartz	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	69 contacts →
	Indirect evidence “We are a team of problem solvers.” Source: RevenueBase Database · checked Sep 28, 2026
18	BCM Law, P.C	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	54 contacts →
	Partial evidence “BCM Law was founded in 1997 with a vision to provide skilled and aggressive defense for Employers and Insurers for complex legal matters such as Workers’ Compensation Defense…” Source: RevenueBase Database · checked Sep 28, 2026
19	Christensen HSU Sipes LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	53 contacts →
	Partial evidence “Christensen Hsu Sipes LLP is a law firm with offices in Chicago, Northwest Indiana, Los Angeles, and Sacramento.” Source: RevenueBase Database · checked Sep 28, 2026
20	Walker Wilcox Matousek LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	47 contacts →
	Indirect evidence “Walker Wilcox, with offices in Chicago and Houston, provides our clients with effective and innovative legal services that deliver value and solutions.” Source: RevenueBase Database · checked Sep 28, 2026
21	Esbrook P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	44 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 28, 2026
22	Nielsen, Zehe & Antas P.C	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	41 contacts →
	Indirect evidence “NZA is a partnership of acclaimed trial and litigation lawyers, fearless and accomplished in their representation of their clients' interests anywhere in the U.S.” Source: RevenueBase Database · checked Sep 28, 2026
23	Cray Huber Horstman Heil & Vanausdal LLC	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	41 contacts →
	Partial evidence “Cray Huber is a Chicago-based law firm with a national litigation practice.” Source: RevenueBase Database · checked Sep 28, 2026
24	Meckler Bulger Tilson Marick & Pearson LLP	Partial evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	51-200	40 contacts →
	Partial evidence “Meckler Bulger Tilson Marick & Pearson LLP (MBT) is one of the nation's leading litigation law firms - with a prominent record of important legal victories on behalf of some of…” Source: RevenueBase Database · checked Sep 28, 2026
25	Hinkhouse Williams Walsh LLP	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 28, 2026	11-50	36 contacts →
	Indirect evidence “Hinkhouse Williams Walsh LLP is a firm of seasoned trial lawyers who understand the unique needs of insurers and reinsurers.” Source: RevenueBase Database · checked Sep 28, 2026

RevenueBase Smart Search

RevenueBase Smart Search assesses information from a company’s LinkedIn profile, information supplied directly by the company, its website, and other publicly available sources. It uses that information to rate how closely the company relates to this list’s category: insurance regulatory law firms. Every row carries its rating and the description the rating was read from, so each one can be checked rather than taken on trust.

Strong evidence: The company's own public description of its business names insurance regulatory law firms.
Partial evidence: Its own public description names part of insurance regulatory law firms, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name insurance regulatory law firms. The match rests on the rest of the company's public profile rather than the one sentence quoted here, so this is the rating to check first.

RevenueBase Smart Search is how these lists are built: RevenueBase's data engine and AI assemble the companies that match a category defined in a user's own words, so a list can be about what companies actually do rather than about whichever industry code they were filed under.

Showing 25 of 187 insurance regulatory law firms based in Chicago, United States

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Insurance regulatory law firms based in Chicago, United States at a glance

As of Sep 28, 2026

54.7%Verified-email coverage

34.6Average contacts per company

1-10Median size (employees)

Sep 28, 2026Page data refreshed

Companies by employee count

1-10

11-50

51-200

201-500

501-1,000

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 187 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 insurance regulatory law 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 “insurance regulatory law 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 insurance regulatory law 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 insurance regulatory law 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, 3,539 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 28, 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.

Insurance regulatory law 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 insurance regulatory law 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 insurance regulatory law firms are there based in Chicago, United States?

RevenueBase identified 187 insurance regulatory law 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?

Hinshaw & Culbertson LLP, headquartered in Chicago, tops this list with the largest team on record.

Which city in the United States has the most insurance regulatory law firms?

New York leads the United States with 241 headquartered companies, followed by Chicago (187) and Houston (179).

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 3,539 verified decision-maker contacts tracked across these 187 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 28, 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.