Company lists · Data refreshed September 2026

Top 24 Underwriting companies based in Chicago, United States

RevenueBase identified 41 company matches for underwriting companies associated with Chicago, United States as of September 2026 and tracks 32,569 professional contacts across them, including 13,875 with verified work emails. Across the United States, New York is the largest hub for this category (72 companies); Chicago has 41.

This list covers company matches for underwriting companies associated with Chicago, 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 22, 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 22, 2026 How this list was built
41Companies
32,569Contacts tracked
13,875Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 24 largest underwriting companies based in Chicago, United States

Ranked by team size
Top 24 of 41 company matches for underwriting companies based in Chicago, United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchChicago, IL, United StatesHQ recorded Sep 22, 202610001+14,217 contacts →

Exact match

“Hi, we’re HUB.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20265,001-10,0006,984 contacts →

Exact match

“CNA is one of the largest U.S.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20265,001-10,0005,419 contacts →

Exact match

“The Kemper family of companies is one of the nation’s leading specialized insurers.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261,001-5,0002,955 contacts →

Exact match

“RT Specialty is a leading wholesale distributor of specialty insurance products and services and the wholesale broking specialty for Ryan Specialty.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20265,001-10,0001,079 contacts →

Exact match

“Ryan Specialty (NYSE: RYAN) is an international specialty insurance firm that provides distribution, underwriting, product development, administration and risk management services…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261,001-5,000318 contacts →

Exact match

“Your risks are complex.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchChicago, IL, United StatesHQ recorded Sep 22, 2026201-500133 contacts →

Exact match

“Producers National Corporation is a holding company based in Chicago, Illinois.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202610001+106 contacts →

Exact match

“Old Republic International (ORI) is one of the nation's 50 largest shareholder-owned insurance businesses and traces its beginnings to 1923.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchChicago, IL, United StatesHQ recorded Sep 22, 2026201-50037 contacts →

Exact match

“Old Republic Inland Marine is a collaborative team of highly specialized, experienced underwriters with the authority to deliver thoughtful, timely underwriting decisions for…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchChicago, IL, United StatesHQ recorded Sep 22, 2026n/a26 contacts →

Exact match

“As of April 1, 2019, JLT Specialty is now a part of Marsh & McLennan.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261-1024 contacts →

Exact match

“JEM Underwriting Managers is a managing general underwriter that provides property solutions with an emphasis on natural catastrophe.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5024 contacts →

Exact match

“Green Shield Risk Solutions is a managing general agent (MGA) built for today’s catastrophic risk environment.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5021 contacts →

Exact match

“Leading the industry since 1985, Special Markets Insurance Consultants (SMIC) is a boutique Managing General Underwriter specializing in General Liability, Accident Medical…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5021 contacts →

Exact match

“In the insurance industry, trust has to be established before it is earned.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
15Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261,001-5,00018 contacts →

Exact match

“Founded in 1998, Lemme, a division of EPIC, assists professional service firms worldwide with insurance and risk management solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5015 contacts →

Exact match

“Managing General Underwriter, Reinsurance Intermediary, Surplus Lines Broker, and a Leader in Creating Innovative Insurance Solutions Brokers’ Risk, a subsidiary of One80…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchChicago, IL, United StatesHQ recorded Sep 22, 2026n/a13 contacts →

Exact match

“AmTrust EXEC is a deeply experienced underwriting team, routinely delivering solutions for the unique risks facing executives at privately- and publicly-held companies.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5010 contacts →

Exact match

“At AJ Wayne & Associates, you can expect fast and dependable service for virtually any risk submitted.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261-1010 contacts →

Exact match

“Sapphire Blue is a Managing General Underwriter that specializes in developing sophisticated solutions for complex healthcare risks.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-5010 contacts →

Exact match

“It doesn't matter.until it does.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
21Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-505 contacts →

Exact match

“Stonegate is part of the Producers National Corporation family of companies.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261-103 contacts →

Exact match

“For more than a quarter of a century we have been providing our valued clients-both individuals and businesses-with quality insurance coverage across the country.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202611-502 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
24Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261-101 contacts →

Exact match

“With it's corporate office in Chicago, Illinois and over 20 years of providing excellent client service, Collector's Risk is committed to the long term relationship required by…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 24 of 41 underwriting companies based in Chicago, United States

See the full list, filter by size, metro and specialty, and access 13,875 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Underwriting companies based in Chicago, United States at a glance

As of Sep 22, 2026
42.6%Verified-email coverage
794.4Average contacts per company
51-200Median size (employees)
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
11
11-50
9
51-200
2
201-500
4
501-1,000
1
1,001-5,000
4
5,001-10,000
5
10001+
5

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 41 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 Chicago, United States whose business descriptions match “underwriting companies” 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 13,875 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 22, 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 “underwriting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many underwriting companies are there based in Chicago, United States?

RevenueBase identified 41 company matches for underwriting companies associated with Chicago, 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?

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

Which city in the United States has the most underwriting companies?

New York leads the United States with 72 company records, followed by Houston (47) and Chicago (41).

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 13,875 professional contacts with verified work emails tracked across these 41 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 22, 2026.

Ready to reach these companies? Verified emails and direct dials for all 41 underwriting companies based in Chicago, United States. Start with a free account, no credit card.

Download this list →

Related lists

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.