Company lists · Data refreshed September 2026
Top 25 Specialty reinsurance underwriters worldwide
RevenueBase identified 1,067 specialty reinsurance underwriters worldwide as of September 2026 and tracks 129,400 professional contacts across them, including 63,959 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.
This list covers specialty reinsurance underwriters worldwide, 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. Country and city lists for specialty reinsurance underwriters follow the table.
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.
The 25 largest specialty reinsurance underwriters worldwide
Ranked by team size| # | Company | Contacts | |||
|---|---|---|---|---|---|
| 1 | 9,825 contacts → | ||||
Partial evidence “We are a leading provider of insurance and reinsurance offering innovative risk management solutions for businesses worldwide.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 2 | 9,614 contacts → | ||||
Indirect evidence “At QBE we’re driven by our purpose of enabling a more resilient future.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 3 | 9,143 contacts → | ||||
Partial evidence “Munich Re is one of the world’s leading providers of reinsurance, primary insurance and insurance-related risk solutions.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 4 | 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, 2026Thanks. The Data Team will review it. | |||||
| 5 | 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, 2026Thanks. The Data Team will review it. | |||||
| 6 | 3,467 contacts → | ||||
Indirect evidence “SCOR, one of the world’s largest reinsurers, serves more than clients worldwide, providing a diversified and innovative range of solutions to control and manage risk.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 7 | 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, 2026Thanks. The Data Team will review it. | |||||
| 8 | 3,309 contacts → | ||||
Strong evidence “We are Sompo, a global provider of commercial and consumer property, casualty, and specialty insurance and reinsurance.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 9 | 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, 2026Thanks. The Data Team will review it. | |||||
| 10 | 2,959 contacts → | ||||
Indirect evidence “CRC Group is all about progress.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 11 | 2,564 contacts → | ||||
Partial evidence “We are a specialty insurer with more than three decades of experience in providing clients with the highest standards of underwriting and claims service worldwide.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 12 | 2,463 contacts → | ||||
Partial evidence “Gallagher Re is one of the largest global reinsurance brokers, helping clients access the capital they need with strategic solutions built for volatile markets.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 13 | 2,329 contacts → | ||||
Indirect evidence “In a world that never stands still – where the nature of risk is constantly evolving and the needs of your customers are continually changing – you need a partner that turns…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 14 | 1,687 contacts → | ||||
Indirect evidence Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 15 | 1,542 contacts → | ||||
Partial evidence “Gen Re is a leading property/casualty and life/health reinsurance company.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 16 | 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, 2026Thanks. The Data Team will review it. | |||||
| 17 | 1,343 contacts → | ||||
Indirect evidence “At QBE we’re driven by our purpose of enabling a more resilient future.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 18 | 1,290 contacts → | ||||
Indirect evidence “Diot-Siaci est un groupe de conseil et de courtage d’assurance et de réassurance leader en France et en Europe, avec de fortes positions également en Asie, au Moyen-Orient et en…” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 19 | 1,201 contacts → | ||||
Partial evidence “We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 20 | 1,115 contacts → | ||||
Partial evidence “CFC is a specialist insurance provider, pioneer in emerging risk and market leader in cyber.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 21 | 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, 2026Thanks. The Data Team will review it. | |||||
| 22 | 1,040 contacts → | ||||
Indirect evidence “Our reputation as the finest advocates in the business comes from our exceptional people delivering exceptional results for over 120 years.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 23 | 1,008 contacts → | ||||
Strong evidence “Safety National is a leading specialty insurance and reinsurance provider.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 24 | 1,002 contacts → | ||||
Strong evidence “Ascot Group is a global specialty insurance and reinsurance group with a record of underwriting excellence and superior claims service.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
| 25 | 918 contacts → | ||||
Indirect evidence “Our history has made us.” Source: RevenueBase Database · checked Sep 18, 2026Thanks. The Data Team will review it. | |||||
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 1,067 specialty reinsurance underwriters worldwide
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Specialty reinsurance underwriters worldwide at a glance
As of Sep 18, 2026Companies by employee count
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.
- Coverage
- 14 countries, largest first: the United States, the United Kingdom, Australia, Brazil, France, Bermuda, South Africa, Türkiye, Germany, the United Arab Emirates and 4 more. Country and city lists for specialty reinsurance underwriters are linked below.
- What qualifies
- Companies worldwide 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.
- 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, 63,959 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 location
14 lists · largest firstEvery Specialty reinsurance underwriters list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.
Countries
- Specialty reinsurance underwriters based in the United States358
- Specialty reinsurance underwriters based in the United Kingdom234
- Specialty reinsurance underwriters based in Australia76
- Specialty reinsurance underwriters based in Brazil47
- Specialty reinsurance underwriters based in France47
- Specialty reinsurance underwriters based in Bermuda46
- Specialty reinsurance underwriters based in South Africa45
- Specialty reinsurance underwriters based in Türkiye42
- Specialty reinsurance underwriters based in Germany31
- Specialty reinsurance underwriters based in the United Arab Emirates30
- Specialty reinsurance underwriters based in Italy29
- Specialty reinsurance underwriters based in Canada28
- Specialty reinsurance underwriters based in India28
- Specialty reinsurance underwriters based in Spain26
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 worldwide?
RevenueBase identified 1,067 specialty reinsurance underwriters worldwide 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?
AXA XL, headquartered in Hamilton, tops this list with the largest team on record.
Which country has the most specialty reinsurance underwriters?
The United States leads with 358 companies, followed by the United Kingdom (234) and Australia (76). Every specialty reinsurance underwriters list by country and city is linked on this page.
Which city has the most specialty reinsurance underwriters?
London leads with 161 headquartered companies, followed by New York (33) and Hamilton (29).
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 63,959 verified decision-maker contacts tracked across these 1,067 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.