Company lists · Data refreshed September 2026

Top 25 Underwriting companies worldwide

RevenueBase identified 7,163 company matches for underwriting companies worldwide as of September 2026 and tracks 480,123 professional contacts across them, including 191,606 with verified work emails. The United States is the largest market and London the largest hub.

This list covers company matches for underwriting companies worldwide, 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 22, 2026. Country and city lists for underwriting companies follow the table.

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 22, 2026 How this list was built
7,163Companies
480,123Contacts tracked
191,606Verified emails
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The 25 largest underwriting companies worldwide

Ranked by team size
Top 25 of 7,163 company matches for underwriting companies worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 22, 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 matchZurich, SwitzerlandHQ recorded Sep 22, 202610001+35,664 contacts →

Exact match

“Chubb is a world leader in insurance.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
2Exact matchNew York, NY, United StatesHQ recorded Sep 22, 202610001+32,682 contacts →

Exact match

“Travelers provides insurance coverage to protect the things that are important to you – your home, your car, your valuables and your business.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
3Exact matchNew York, NY, United StatesHQ recorded Sep 22, 202610001+23,438 contacts →

Exact match

“American International Group, Inc.(NYSE: AIG) is a leading global insurance organization.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
4Exact matchChicago, IL, United StatesHQ recorded Sep 22, 202610001+14,217 contacts →

Exact match

“Hi, we’re HUB.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
5Exact matchZurich, SwitzerlandHQ recorded Sep 22, 202610001+13,675 contacts →

Exact match

“The Swiss Re Group is a leading wholesale provider of reinsurance, insurance and other insurance-based forms of risk transfer.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
6Exact matchHamilton, BermudaHQ recorded Sep 22, 202610001+9,825 contacts →

Exact match

“We are a leading provider of insurance and reinsurance offering innovative risk management solutions for businesses worldwide.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
7Exact matchSydney, AustraliaHQ recorded Sep 22, 202610001+9,614 contacts →

Exact match

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

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
8Exact matchMunich, GermanyHQ recorded Sep 22, 202610001+9,143 contacts →

Exact match

“Munich Re is one of the world’s leading providers of reinsurance, primary insurance and insurance-related risk solutions.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
9Exact matchWhite Plains, NY, United StatesHQ recorded Sep 22, 202610001+9,086 contacts →

Exact match

“Marsh McLennan Agency, a business of Marsh (NYSE: MRSH), is a leading provider of business insurance, employee health & benefits, retirement & wealth, and private client insurance…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
10Exact matchSchaumburg, IL, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
11Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20265,001-10,0006,984 contacts →

Exact match

“CNA is one of the largest U.S.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
12Exact matchPuteaux, FranceHQ recorded Sep 22, 20265,001-10,0006,821 contacts →

Exact match

“Numéro 1 mondial en assurance de biens et de responsabilités, numéro 2 mondial en assurance de personnes, Allianz propose une offre complète qui couvre tous les besoins en…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
13Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20265,001-10,0005,419 contacts →

Exact match

“The Kemper family of companies is one of the nation’s leading specialized insurers.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
14Exact matchCharlotte, NC, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
15Exact matchJohannesburg, South AfricaHQ recorded Sep 22, 20261,001-5,0004,528 contacts →

Exact match

“Life is full of unsures.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
16Exact matchChesterfield, MO, United StatesHQ recorded Sep 22, 20261,001-5,0004,128 contacts →

Exact match

“Reinsurance Group of America, Incorporated (NYSE: RGA) is a global industry leader specializing in life and health reinsurance and financial solutions that help clients…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
17Exact matchStevens Point, WI, United StatesHQ recorded Sep 22, 20265,001-10,0003,963 contacts →

Exact match

“Sentry Insurance got its start in 1904, when members of the Wisconsin Retail Hardware Association formed their own insurance company.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
18Exact matchHannover, GermanyHQ recorded Sep 22, 20265,001-10,0003,763 contacts →

Exact match

“HDI Global SE – Your Trusted Partner in Transformation Companies in the trading, manufacturing, and service industries need a reliable insurance partner.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
19Exact matchParis, FranceHQ recorded Sep 22, 20261,001-5,0003,467 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
20Exact matchWarren, NJ, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
21Exact matchPembroke, BermudaHQ recorded Sep 22, 20265,001-10,0003,309 contacts →

Exact match

“We are Sompo, a global provider of commercial and consumer property, casualty, and specialty insurance and reinsurance.”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
22Exact matchGlen Allen, VA, United StatesHQ recorded Sep 22, 20261,001-5,0003,151 contacts →

Exact match

“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…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase
23Exact matchCharlotte, NC, United StatesHQ recorded Sep 22, 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 22, 2026 · View company records in RevenueBase
24Exact matchChicago, IL, United StatesHQ recorded Sep 22, 20261,001-5,0002,955 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 · Sep 22, 2026 · View company records in RevenueBase
25Exact matchChennai, IndiaHQ recorded Sep 22, 20261,001-5,0002,580 contacts →

Exact match

“Royal Sundaram is a leading provider of innovative general insurance solutions to individuals, families, and businesses, both directly and through intermediaries and affinity…”

Recorded in the RevenueBase company graph · Sep 22, 2026 · View company records in RevenueBase

Showing 25 of 7,163 underwriting companies worldwide

See the full list, filter by size, metro and specialty, and access 191,606 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Underwriting companies worldwide at a glance

As of Sep 22, 2026
39.9%Verified-email coverage
67.0Average contacts per company
11-50Median size (employees)
3.4%Largest-city concentration · London
Sep 22, 2026Page data refreshed

Companies by employee count

1-10
3,481
11-50
2,220
51-200
792
201-500
275
501-1,000
119
1,001-5,000
138
5,001-10,000
28
10001+
76

Email recency is reported on each country list linked below.

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.
Coverage
Every country. Country and city lists for underwriting companies are linked below.
What qualifies
Company records worldwide whose business descriptions match “underwriting companies” 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. 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 191,606 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 22, 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.

Underwriting companies by location

32 lists · largest first

Every Underwriting companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

Cities

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 “underwriting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many underwriting companies are there worldwide?

RevenueBase identified 7,163 company matches for underwriting companies worldwide 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?

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

Which country has the most underwriting companies?

The United States leads with 2,227 companies, followed by the United Kingdom (539) and Brazil (379). Every underwriting companies list by country and city is linked on this page.

Which city has the most underwriting companies?

London leads with 247 company records, followed by Sao Paulo (120) and New York (72).

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 191,606 professional contacts with verified work emails tracked across these 7,163 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 22, 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.