Company lists · Data refreshed September 2026

Top 25 Insurance underwriting firms based in the United States

RevenueBase identified 157 company matches for insurance underwriting firms associated with the United States as of September 2026 and tracks 31,206 professional contacts across them, including 12,896 with verified work emails. New York is the largest hub.

This list covers company matches for insurance underwriting 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 17, 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 17, 2026 How this list was built
157Companies
31,206Contacts tracked
12,896Verified emails
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The 25 largest insurance underwriting firms based in the United States

Ranked by team size
Top 25 of 157 company matches for insurance underwriting firms based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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 matchSchaumburg, IL, United StatesHQ recorded Sep 17, 20265,001-10,0008,988 contacts →

Exact match

“Zurich North America is one of the largest providers of insurance solutions and services to businesses and individuals.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2Exact matchCharlotte, NC, United StatesHQ recorded Sep 17, 20265,001-10,0004,926 contacts →

Exact match

“Amwins is the largest wholesale distributor of specialty insurance products and services in the U.S.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
3Exact matchCharlotte, NC, United StatesHQ recorded Sep 17, 20261,001-5,0003,021 contacts →

Exact match

“When it comes to protecting what matters most in business and everyday life, at McGriff we believe our clients should never settle for less than the best.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4Exact matchWayne, PA, United StatesHQ recorded Sep 17, 20261,001-5,0001,314 contacts →

Exact match

“We aspire to be the very best insurance company at underwriting insurance products for our customers.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5Exact matchJersey City, NJ, United StatesHQ recorded Sep 17, 20265,001-10,0001,097 contacts →

Exact match

“Underwriting solutions at Verisk is a leading provider of advanced tools and analytics for the property/casualty and life insurance industries.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6Exact matchNew York, NY, United StatesHQ recorded Sep 17, 2026501-1,000851 contacts →

Exact match

“Argo Group is a U.S-focused underwriter of specialty insurance products in the property and casualty market.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7Exact matchOmaha, NE, United StatesHQ recorded Sep 17, 20261,001-5,000680 contacts →

Exact match

“Applied Underwriters® is a global risk services firm helping business and people manage uncertainty through its business services, insurance, and reinsurance solutions.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8Exact matchJacksonville, FL, United StatesHQ recorded Sep 17, 2026501-1,000553 contacts →

Exact match

“For more than 45 years, Fortegra and its subsidiaries have delivered risk management solutions that help people and businesses succeed in the face of uncertainty.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9Exact matchLa Jolla, CA, United StatesHQ recorded Sep 17, 2026501-1,000363 contacts →

Exact match

“Founded in 2014, by a team with deep experience across underwriting, analytics, reinsurance and capital markets, Palomar is an innovative specialty insurer serving residential and…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10Exact matchGoldsboro, NC, United StatesHQ recorded Sep 17, 2026201-500335 contacts →

Exact match

“Atlantic Casualty Insurance Company (Atlantic Casualty) was formed by Strickland Insurance Group (SIG) in 1983 to underwrite a substantial book of non-standard personal auto.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11Exact matchAlgona, IA, United StatesHQ recorded Sep 17, 2026201-500235 contacts →

Exact match

“For more than a century, Pharmacists Mutual has been providing specialized insurance solutions backed by solid industry insight.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12Exact matchSyracuse, NY, United StatesHQ recorded Sep 17, 2026201-500229 contacts →

Exact match

“ONEGROUP is a leader in risk management, insurance and business solutions.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
13Exact matchCortland, NY, United StatesHQ recorded Sep 17, 202651-200191 contacts →

Exact match

“McNeil & Co.| We Are Who We Insure McNeil & Co.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14Exact matchNashville, TN, United StatesHQ recorded Sep 17, 202651-200162 contacts →

Exact match

“JMI Reports provides its more than 150 insurance carrier and broker clients with underwriting risk data and property risk profiles that allow for better decision making…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15Exact matchEncino, CA, United StatesHQ recorded Sep 17, 2026201-500127 contacts →

Exact match

“Tokio Marine HCC – Cyber & Professional Lines Group (CPLG) is a specialty insurance provider.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16Exact matchGlen Allen, VA, United StatesHQ recorded Sep 17, 202651-200110 contacts →

Exact match

“Verus Specialty Insurance is an underwriting management company targeting small to midsize commercial risks in the E&S and Specialty insurance markets through appointed wholesale…”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17Exact matchDallas, TX, United StatesHQ recorded Sep 17, 2026201-500105 contacts →

Exact match

“Risk Theory provides nationwide insurance programs which incorporate dynamic coverages, features, and flexible underwriting with dependable, and reasonably priced coverage.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18Exact matchOverland Park, KS, United StatesHQ recorded Sep 17, 202651-20099 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19Exact matchFort Worth, TX, United StatesHQ recorded Sep 17, 202651-20087 contacts →

Exact match

“Wellington Insurance Group is a Texas-based risk distribution and financial services organization specializing in the delivery and administration of residential property insurance.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20Exact matchLake Mary, FL, United StatesHQ recorded Sep 17, 202651-20087 contacts →

Exact match

“IRSi offers a full range of insurance inspection services and field underwriting support aimed at delivering you all the information you need to make informed decisions.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21Exact matchNew York, NY, United StatesHQ recorded Sep 17, 202651-20076 contacts →

Exact match

“Falcon Risk Services, an HDI Company, is a provider of specialty underwriting and claims solutions to US and multinational corporations.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22Exact matchSpokane, WA, United StatesHQ recorded Sep 17, 202651-20071 contacts →

Exact match

“Cochrane & Company was established in 1960 in Spokane, Washington.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
23Exact matchCanton, OH, United StatesHQ recorded Sep 17, 202651-20070 contacts →

Exact match

“Our industry-leading, 95-percent client retention rate is a reflection of our people and our approach.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24Exact matchMelville, NY, United StatesHQ recorded Sep 17, 202651-20057 contacts →

Exact match

“Bradley & Parker is a premier insurance, risk management and financial services firm headquartered in Melville, NY, the business hub of Long Island.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25Exact matchNew York, NY, United StatesHQ recorded Sep 17, 202651-20054 contacts →

Exact match

“Sixfold is the AI brain behind better underwriting.”

Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

Showing 25 of 157 insurance underwriting firms based in the United States

See the full list, filter by size, metro and specialty, and access 12,896 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Insurance underwriting firms based in the United States at a glance

As of Sep 17, 2026
41.3%Verified-email coverage
198.8Average contacts per company
11-50Median size (employees)
7.0%Largest-city concentration · New York
Sep 17, 2026Page data refreshed

Companies by employee count

1-10
55
11-50
49
51-200
26
201-500
8
501-1,000
8
1,001-5,000
7
5,001-10,000
3
10001+
1

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 157 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 “insurance underwriting 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 12,896 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 17, 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 “insurance underwriting firms”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many insurance underwriting firms are there based in the United States?

RevenueBase identified 157 company matches for insurance underwriting 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?

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

Which city has the most insurance underwriting firms?

New York leads with 11 company records, followed by Houston (5) and Miami (4).

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 12,896 professional contacts with verified work emails tracked across these 157 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 17, 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.