Company lists · Data refreshed September 2026

Top 18 Treaty reinsurance underwriters based in the United States

RevenueBase identified 26 company matches for treaty reinsurance underwriters associated with the United States as of September 2026 and tracks 7,517 professional contacts across them, including 4,566 with verified work emails. Stamford is the largest hub.

This list covers company matches for treaty reinsurance underwriters 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 19, 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 19, 2026 How this list was built
26Companies
7,517Contacts tracked
4,566Verified emails
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The 18 largest treaty reinsurance underwriters based in the United States

Ranked by team size
Top 18 of 26 company matches for treaty reinsurance underwriters based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 19, 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 matchWarren, NJ, United StatesHQ recorded Sep 19, 20261,001-5,0003,411 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 · Sep 19, 2026 · View company records in RevenueBase
2Exact matchStamford, CT, United StatesHQ recorded Sep 19, 20261,001-5,0001,542 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
3Exact matchNew York, NY, United StatesHQ recorded Sep 19, 2026501-1,000578 contacts →

Exact match

“We are a leading international reinsurance organization headquartered in New York with operations worldwide.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
4Exact matchStamford, CT, United StatesHQ recorded Sep 19, 2026501-1,000530 contacts →

Exact match

“OdysseyRe offers a broad range of property, casualty, and specialty reinsurance solutions through a network of 14 branch and representative offices around the world.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
5Exact matchNew York, United StatesHQ recorded Sep 19, 202651-200193 contacts →

Exact match

“We write a wide variety of complex transactional and specialty casualty and reinsurance risks, creating customized responsive underwriting solutions for a range of exposures.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
6Exact matchSchaumburg, IL, United StatesHQ recorded Sep 19, 202651-200133 contacts →

Exact match

“American Agricultural Insurance Company (AmericanAg®) stands out from the marketplace as a provider of reinsurance services across the insurance spectrum with a growing global…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
7Exact matchStamford, CT, United StatesHQ recorded Sep 19, 202651-200128 contacts →

Exact match

“The Stamford, Connecticut-based RVI Group is a financial services company focused on specialty property and casualty insurance and reinsurance.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
8Exact matchSpokane, WA, United StatesHQ recorded Sep 19, 202651-20071 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
9Exact matchMorristown, NJ, United StatesHQ recorded Sep 19, 2026501-1,00053 contacts →

Exact match

“In the United States, we underwrite specialty casualty and property reinsurance, including some of today’s most distressed lines of business.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
10Exact matchMorristown, NJ, United StatesHQ recorded Sep 19, 202651-20051 contacts →

Exact match

“The Toa Reinsurance Company of America is an insurance company based out of 177 Madison Avenue, Morristown, New Jersey, United States.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
11Exact matchMiami, FL, United StatesHQ recorded Sep 19, 202611-5031 contacts →

Exact match

“Dynamic Reinsurance is an Underwriting Agency registered in the USA.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
12Exact matchMiami, FL, United StatesHQ recorded Sep 19, 202611-5015 contacts →

Exact match

“INTERNATIONAL REINSURANCE MANAGERS, LLC (IRM), established in 1996, is a recognized leader in writing (on behalf of top-rated reinsurers), and managing Health and Group Life…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
13Exact matchCherry Valley, IL, United StatesHQ recorded Sep 19, 202611-5012 contacts →

Exact match

“Mutual Re is a reinsurance company organized in 1921 for the sole purpose of diversifying risk for and among insurance companies throughout the United States.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
14Exact matchConshohocken, PA, United StatesHQ recorded Sep 19, 20261-106 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
15Exact matchEphrata, PA, United StatesHQ recorded Sep 19, 202611-506 contacts →

Exact match

“G.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
16Exact matchLos Angeles, CA, United StatesHQ recorded Sep 19, 202611-502 contacts →

Exact match

“GJS Re is a reinsurance intermediary with unparalleled capabilities in traditional treaty and facultative reinsurance, but also extend to program market connections, reinsurance…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
17Exact matchStamford, CT, United StatesHQ recorded Sep 19, 202651-2002 contacts →

Exact match

“Berkley Re provides other insurance companies and self-insured businesses with assistance managing their net risk through reinsurance in one of two ways: Treaty Reinsurance, in…”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase
18Exact matchAviation, United StatesHQ recorded Sep 19, 20261-101 contacts →

Exact match

“The smart reinsurance brokers.”

Recorded in the RevenueBase company graph · Sep 19, 2026 · View company records in RevenueBase

Showing 18 of 26 treaty reinsurance underwriters based in the United States

See the full list, filter by size, metro and specialty, and access 4,566 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Treaty reinsurance underwriters based in the United States at a glance

As of Sep 19, 2026
60.7%Verified-email coverage
289.1Average contacts per company
51-200Median size (employees)
19.2%Largest-city concentration · Stamford
Sep 19, 2026Page data refreshed

Companies by employee count

1-10
5
11-50
6
51-200
9
501-1,000
4
1,001-5,000
2

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 26 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 “treaty reinsurance underwriters” 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 4,566 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 19, 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 “treaty reinsurance underwriters”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many treaty reinsurance underwriters are there based in the United States?

RevenueBase identified 26 company matches for treaty reinsurance underwriters 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?

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

Which city has the most treaty reinsurance underwriters?

Stamford leads with 5 company records, followed by Miami (3) and New York (3).

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 4,566 professional contacts with verified work emails tracked across these 26 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 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 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.