Company lists · Data refreshed October 2026

Top 25 Casualty reinsurance brokers based in the United States

RevenueBase identified 1,513 company matches for casualty reinsurance brokers associated with the United States as of October 2026 and tracks 175,037 professional contacts across them, including 88,678 with verified work emails. Rolling Meadows is the largest hub.

This list covers company matches for casualty reinsurance brokers 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 October 9, 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 Oct 9, 2026 How this list was built
1,513Companies
175,037Contacts tracked
88,678Verified emails
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The 25 largest casualty reinsurance brokers based in the United States

Ranked by team size
Top 25 of 1,513 company matches for casualty reinsurance brokers based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 9, 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 Oct 9, 202610001+14,807 contacts →

Exact match

“Hi, we’re HUB.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
2Exact matchDallas, TX, United StatesHQ recorded Oct 9, 202610001+14,330 contacts →

Exact match

“What makes Lockton stand apart is also what makes us better: independence.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
3Exact matchValhalla, NY, United StatesHQ recorded Oct 9, 202610001+10,601 contacts →

Exact match

“USI is one of the largest insurance brokerage and consulting firms in the world, delivering property and casualty, employee benefits, personal risk, program and retirement…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Oct 9, 202610001+8,763 contacts →

Exact match

“We help our clients and colleagues grow, and our communities thrive, by protecting and promoting Possibility.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
5Exact matchIrvine, CA, United StatesHQ recorded Oct 9, 202610001+6,474 contacts →

Exact match

“Alliant Insurance Services is among the top 5 largest and fastest-growing insurance brokerage and consulting firms in the United States.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
6Exact matchCharlotte, NC, United StatesHQ recorded Oct 9, 20265,001-10,0005,053 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 · Oct 9, 2026 · View company records in RevenueBase
7Exact matchNew York, NY, United StatesHQ recorded Oct 9, 20261,001-5,0003,643 contacts →

Exact match

“At Guy Carpenter, a Marsh business, we deliver a powerful combination of (re)insurance broking expertise, capital solutions, global analytics, advisory, and client support…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
8Exact matchWarren, NJ, United StatesHQ recorded Oct 9, 20261,001-5,0003,122 contacts →

Exact match

“Everest Group, Ltd.(“Everest”) is a global underwriting leader providing best-in-class property, casualty, and specialty reinsurance and insurance solutions that address…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
9Exact matchChicago, IL, United StatesHQ recorded Oct 9, 20261,001-5,0003,006 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 · Oct 9, 2026 · View company records in RevenueBase
10Exact matchCharlotte, NC, United StatesHQ recorded Oct 9, 20261,001-5,0002,827 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 · Oct 9, 2026 · View company records in RevenueBase
11Exact matchDenver, CO, United StatesHQ recorded Oct 9, 20261,001-5,0002,610 contacts →

Exact match

“With over four decades of experience in the industry, IMA has become a trusted leader in commercial insurance, risk management, surety, and employee benefits brokerage and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
12Exact matchNew York, NY, United StatesHQ recorded Oct 9, 202610001+2,018 contacts →

Exact match

“At QBE we’re driven by our purpose of enabling a more resilient future.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
13Exact matchBoston, MA, United StatesHQ recorded Oct 9, 20261,001-5,0001,813 contacts →

Exact match

“Berkshire Hathaway Specialty Insurance is an organization committed to providing long-term risk solutions and claims care to our customers backed by the financial strength of…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
14Exact matchRolling Meadows, IL, United StatesHQ recorded Oct 9, 20261,001-5,0001,734 contacts →

Exact match

“At Risk Placement Services, we help you come through for your clients!”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
15Exact matchBoston, MA, United StatesHQ recorded Oct 9, 20265,001-10,0001,635 contacts →

Exact match

“At Risk Strategies, part of the Brown & Brown team, we help our clients protect those things that matter most to them.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
16Exact matchStamford, CT, United StatesHQ recorded Oct 9, 20261,001-5,0001,631 contacts →

Exact match

“Gen Re is a leading property/casualty and life/health reinsurance company.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
17Exact matchLongwood, FL, United StatesHQ recorded Oct 9, 20261,001-5,0001,522 contacts →

Exact match

“Insurance Office of America (IOA) is the fourth largest privately held insurance brokerage in the United States.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
18Exact matchCanoga Park, CA, United StatesHQ recorded Oct 9, 2026n/a1,188 contacts →

Exact match

“Founded in 1972, Allen Lawrence & Associates, LLC.(AL & A) has the distinct advantage of active participation by its principals.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
19Exact matchChicago, IL, United StatesHQ recorded Oct 9, 20265,001-10,0001,168 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 · Oct 9, 2026 · View company records in RevenueBase
20Exact matchDubuque, IA, United StatesHQ recorded Oct 9, 20261,001-5,000974 contacts →

Exact match

“Cottingham & Butler is the 3rd largest privately and independently held insurance broker in the U.S.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
21Exact matchRadnor, PA, United StatesHQ recorded Oct 9, 20261,001-5,000946 contacts →

Exact match

“Willis Group Holdings plc is a leading global insurance broker.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
22Exact matchOmaha, NE, United StatesHQ recorded Oct 9, 20261,001-5,000691 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 · Oct 9, 2026 · View company records in RevenueBase
23Exact matchCincinnati, OH, United StatesHQ recorded Oct 9, 20261,001-5,000685 contacts →

Exact match

“Core Specialty, through its subsidiary insurers, offers a diversified range of property, casualty, and marine insurance products for small to mid-sized businesses.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
24Exact matchCamden, NJ, United StatesHQ recorded Oct 9, 2026501-1,000638 contacts →

Exact match

“As one of America’s largest and most admired insurance brokerage and consulting firms, our mission is to provide innovative solutions to businesses facing complex risks and…”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase
25Exact matchMoorestown, NJ, United StatesHQ recorded Oct 9, 2026201-500635 contacts →

Exact match

“Admiral Insurance Group, a Berkley company, provides excess and surplus (E&S) lines of commercial insurance exclusively through our nationwide network of wholesale brokers.”

Recorded in the RevenueBase company graph · Oct 9, 2026 · View company records in RevenueBase

Showing 25 of 1,513 casualty reinsurance brokers based in the United States

See the full list, filter by size, metro and specialty, and access 88,678 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Casualty reinsurance brokers based in the United States at a glance

As of Oct 9, 2026
50.7%Verified-email coverage
115.7Average contacts per company
11-50Median size (employees)
8.7%Largest-city concentration · Rolling Meadows
Oct 9, 2026Page data refreshed

Companies by employee count

1-10
572
11-50
476
51-200
176
201-500
41
501-1,000
28
1,001-5,000
45
5,001-10,000
15
10001+
158

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 1,513 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 “casualty reinsurance brokers” 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 88,678 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 October 9, 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 “casualty reinsurance brokers”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many casualty reinsurance brokers are there based in the United States?

RevenueBase identified 1,513 company matches for casualty reinsurance brokers associated with the United States as of October 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 has the most casualty reinsurance brokers?

Rolling Meadows leads with 131 company records, followed by New York (59) and Miami (31).

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 88,678 professional contacts with verified work emails tracked across these 1,513 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 October 9, 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.