Company lists · Data refreshed September 2026

Top 25 Specialty reinsurance underwriters based in the United States

Name: Specialty reinsurance underwriters based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 18, 2026 358 companies tracked

RevenueBase identified 358 specialty reinsurance underwriters headquartered in the United States as of September 2026 and tracks 45,276 professional contacts across them, including 23,756 with verified work emails. New York is the largest hub.

This list covers specialty reinsurance underwriters headquartered in the 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 18, 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 18, 2026 86% judged on-target in blind review

358Companies

45,276Contacts tracked

23,756Verified emails

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The 25 largest specialty reinsurance underwriters based in the United States

Ranked by team size

Top 25 of 358 specialty reinsurance underwriters based in the United States, ranked by team size, largest first. Data refreshed Sep 18, 2026. RevenueBase Smart Search rates how each company's information relates to specialty reinsurance underwriters: 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	Amwins	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 18, 2026	5,001-10,000	4,926 contacts →
	Partial evidence “Amwins is the largest wholesale distributor of specialty insurance products and services in the U.S.” Source: RevenueBase Database · checked Sep 18, 2026
2	Reinsurance Group Of America, Incorporated	Strong evidence	Chesterfield, MO, United StatesHQ checked Sep 18, 2026	1,001-5,000	4,128 contacts →
	Strong evidence “Reinsurance Group of America, Incorporated (NYSE: RGA) is a global industry leader specializing in life and health reinsurance and financial solutions that help clients…” Source: RevenueBase Database · checked Sep 18, 2026
3	Everest	Strong evidence	Warren, NJ, United StatesHQ checked Sep 18, 2026	1,001-5,000	3,411 contacts →
	Strong evidence “Everest Group, Ltd.(“Everest”) is a global underwriting leader providing best-in-class property, casualty, and specialty reinsurance and insurance solutions that address…” Source: RevenueBase Database · checked Sep 18, 2026
4	Markel	Indirect evidence	Glen Allen, VA, United StatesHQ checked Sep 18, 2026	1,001-5,000	3,151 contacts →
	Indirect evidence “As the insurance operations within the Markel Group Inc.(NYSE: MKL), we leverage a broad array of capabilities and expertise to create intelligent solutions for the most complex…” Source: RevenueBase Database · checked Sep 18, 2026
5	CRC Group	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 18, 2026	5,001-10,000	2,959 contacts →
	Indirect evidence “CRC Group is all about progress.” Source: RevenueBase Database · checked Sep 18, 2026
6	QBE North America	Indirect evidence	New York, NY, United StatesHQ checked Sep 18, 2026	10001+	1,883 contacts →
	Indirect evidence “At QBE we’re driven by our purpose of enabling a more resilient future.” Source: RevenueBase Database · checked Sep 18, 2026
7	GEN RE	Partial evidence	Stamford, CT, United StatesHQ checked Sep 18, 2026	1,001-5,000	1,542 contacts →
	Partial evidence “Gen Re is a leading property/casualty and life/health reinsurance company.” Source: RevenueBase Database · checked Sep 18, 2026
8	RLI Insurance Company	Partial evidence	Peoria, IL, United StatesHQ checked Sep 18, 2026	1,001-5,000	1,386 contacts →
	Partial evidence “RLI is a U.S-based specialty insurer that serves niche property, casualty and surety markets.” Source: RevenueBase Database · checked Sep 18, 2026
9	Ryan Specialty	Partial evidence	Chicago, IL, United StatesHQ checked Sep 18, 2026	5,001-10,000	1,079 contacts →
	Partial evidence “Ryan Specialty (NYSE: RYAN) is an international specialty insurance firm that provides distribution, underwriting, product development, administration and risk management services…” Source: RevenueBase Database · checked Sep 18, 2026
10	Safety National	Strong evidence	St Louis, MO, United StatesHQ checked Sep 18, 2026	501-1,000	1,008 contacts →
	Strong evidence “Safety National is a leading specialty insurance and reinsurance provider.” Source: RevenueBase Database · checked Sep 18, 2026
11	Argo Group	Strong evidence	New York, NY, United StatesHQ checked Sep 18, 2026	501-1,000	851 contacts →
	Strong evidence “Argo Group is a U.S-focused underwriter of specialty insurance products in the property and casualty market.” Source: RevenueBase Database · checked Sep 18, 2026
12	Applied Underwriters	Strong evidence	Omaha, NE, United StatesHQ checked Sep 18, 2026	1,001-5,000	680 contacts →
	Strong evidence “Applied Underwriters® is a global risk services firm helping business and people manage uncertainty through its business services, insurance, and reinsurance solutions.” Source: RevenueBase Database · checked Sep 18, 2026
13	Hudson Insurance Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 18, 2026	201-500	675 contacts →
	Indirect evidence “Headquartered in New York City with offices throughout the U.S.” Source: RevenueBase Database · checked Sep 18, 2026
14	Transre	Partial evidence	New York, NY, United StatesHQ checked Sep 18, 2026	501-1,000	578 contacts →
	Partial evidence “We are a leading international reinsurance organization headquartered in New York with operations worldwide.” Source: RevenueBase Database · checked Sep 18, 2026
15	Skyward Specialty Insurance	Partial evidence	Houston, TX, United StatesHQ checked Sep 18, 2026	501-1,000	561 contacts →
	Partial evidence “Skyward Specialty is a rapidly growing and innovative specialty insurance company, delivering commercial P&C products and solutions on a non-admitted and admitted basis.” Source: RevenueBase Database · checked Sep 18, 2026
16	Fortegra	Indirect evidence	Jacksonville, FL, United StatesHQ checked Sep 18, 2026	501-1,000	553 contacts →
	Indirect evidence “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.” Source: RevenueBase Database · checked Sep 18, 2026
17	Odysseyre	Strong evidence	Stamford, CT, United StatesHQ checked Sep 18, 2026	501-1,000	530 contacts →
	Strong evidence “OdysseyRe offers a broad range of property, casualty, and specialty reinsurance solutions through a network of 14 branch and representative offices around the world.” Source: RevenueBase Database · checked Sep 18, 2026
18	Rsui Group, INC	Strong evidence	Atlanta, GA, United StatesHQ checked Sep 18, 2026	201-500	442 contacts →
	Strong evidence “RSUI is a leading underwriter of wholesale specialty insurance.” Source: RevenueBase Database · checked Sep 18, 2026
19	Society Insurance	Indirect evidence	Fond Du Lac, WI, United StatesHQ checked Sep 18, 2026	201-500	409 contacts →
	Indirect evidence “Society Insurance has been a leading niche insurance carrier since 1915.” Source: RevenueBase Database · checked Sep 18, 2026
20	Seneca Insurance Company	Partial evidence	New York, NY, United StatesHQ checked Sep 18, 2026	201-500	377 contacts →
	Partial evidence “Seneca Insurance Company is a Specialty Property and Casualty Insurance company with thirteen offices across the U.S.” Source: RevenueBase Database · checked Sep 18, 2026
21	Navigators, A Brand Of The Hartford	Indirect evidence	Hartford, CT, United StatesHQ checked Sep 18, 2026	10001+	367 contacts →
	Indirect evidence “Navigators, a brand of The Hartford is a market-leading provider of E&S solutions.” Source: RevenueBase Database · checked Sep 18, 2026
22	Westchester, A Chubb Company	Indirect evidence	Alpharetta, GA, United StatesHQ checked Sep 18, 2026	501-1,000	363 contacts →
	Indirect evidence “About Us Westchester is one of the largest and most diverse excess and surplus lines commercial property and casualty insurance companies in the United States.” Source: RevenueBase Database · checked Sep 18, 2026
23	Ironshore Insurance	Indirect evidence	NY, United StatesHQ checked Sep 18, 2026	1,001-5,000	344 contacts →
	Indirect evidence “Ironshore, a Liberty Mutual Company, is dedicated to the wholesale market.” Source: RevenueBase Database · checked Sep 18, 2026
24	Gbli Global Indemnity	Partial evidence	Bala Cynwyd, PA, United StatesHQ checked Sep 18, 2026	201-500	300 contacts →
	Partial evidence “GBLI \| Global Indemnity provides specialty property and casualty coverage for a wide range of markets-from small business, manufactured homes, and vacant property to agriculture…” Source: RevenueBase Database · checked Sep 18, 2026
25	Canada Life Reinsurance	Indirect evidence	Blue Bell, PA, United StatesHQ checked Sep 18, 2026	501-1,000	293 contacts →
	Indirect evidence “We are one of the world's leading providers of risk and capital optimization solutions, serving insurers, pension schemes, and financial institutions across North America, Europe…” Source: RevenueBase Database · checked Sep 18, 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: specialty reinsurance underwriters. 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 specialty reinsurance underwriters.
Partial evidence: Its own public description names part of specialty reinsurance underwriters, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name specialty reinsurance underwriters. 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 358 specialty reinsurance underwriters based in the United States

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Specialty reinsurance underwriters based in the United States at a glance

As of Sep 18, 2026

52.5%Verified-email coverage

126.5Average contacts per company

11-50Median size (employees)

9.2%Largest-city concentration · New York

Sep 18, 2026Page data refreshed

Companies by employee count

1-10

111

11-50

128

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 358 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 specialty reinsurance underwriters, 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 the United States whose own description of what they do matches “specialty reinsurance underwriters”. 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 specialty reinsurance underwriters), 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 specialty reinsurance underwriters, and records with no verified work email. Companies headquartered outside United States 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, 23,756 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 18, 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.

Specialty reinsurance underwriters by metro

Specialty reinsurance underwriters in New York33

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 specialty reinsurance underwriters, 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 specialty reinsurance underwriters are there based in the United States?

RevenueBase identified 358 specialty reinsurance underwriters headquartered in the 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?

Amwins, headquartered in Charlotte, tops this list with the largest team on record.

Which city has the most specialty reinsurance underwriters?

New York leads with 33 headquartered companies, followed by Miami (18) and Chicago (12).

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 23,756 verified decision-maker contacts tracked across these 358 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 18, 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.