Company lists · Data refreshed November 2026

Top 25 Marine insurance underwriters worldwide

RevenueBase identified 852 company matches for marine insurance underwriters worldwide as of November 2026 and tracks 27,103 professional contacts across them, including 9,809 with verified work emails. The United Kingdom is the largest market and London the largest hub.

This list covers company matches for marine insurance underwriters 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 November 6, 2026. Country and city lists for marine insurance underwriters 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 Nov 6, 2026 How this list was built
852Companies
27,103Contacts tracked
9,809Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest marine insurance underwriters worldwide

Ranked by team size
Top 25 of 852 company matches for marine insurance underwriters worldwide, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Nov 6, 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 matchWola, PolandHQ recorded Nov 6, 20261,001-5,0001,855 contacts →

Exact match

“WARTA Insurance and Reinsurance Company maintains a steady position as the second largest insurer on the market.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
2Exact matchLondon, United KingdomHQ recorded Nov 6, 20261,001-5,0001,237 contacts →

Exact match

“We are a specialist insurer and reinsurer with a 100-year record of helping clients navigate the world’s most complex and demanding risks.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
3Exact matchCincinnati, OH, United StatesHQ recorded Nov 6, 20261,001-5,000690 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 · Nov 6, 2026 · View company records in RevenueBase
4Exact matchHamilton, BermudaHQ recorded Nov 6, 2026201-500685 contacts →

Exact match

“Specialist commercial insurer and reinsurer, underwriting a diversified portfolio of specialty lines.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
5Exact matchArendal, NorwayHQ recorded Nov 6, 2026501-1,000671 contacts →

Exact match

“Gard is a shipowner-controlled provider of P&I, marine and energy insurance products.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
6Exact match千代田区, JapanHQ recorded Nov 6, 202610001+657 contacts →

Exact match

“Mitsui Sumitomo Insurance Company, Limited ("MSI") was formed in October 2001 through a merger between the former Mitsui Marine & Fire Insurance Co, Ltd.("Mitsui Marine") and the…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
7Exact matchCorporate Headquarters: Bermuda, NY, SwedenHQ recorded Nov 6, 2026501-1,000625 contacts →

Exact match

“SiriusPoint is a global underwriter of insurance and reinsurance providing solutions to clients and brokers around the world.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
8Exact matchNewcastle Upon Tyne, United KingdomHQ recorded Nov 6, 2026501-1,000623 contacts →

Exact match

“The home of NorthStandard updates.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
9Exact matchJacksonville, LA, United StatesHQ recorded Nov 6, 2026501-1,000595 contacts →

Exact match

“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.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
10Exact matchLe Havre, FranceHQ recorded Nov 6, 2026501-1,000544 contacts →

Exact match

“Assureur spécialiste des risques d'entreprise • 1er Assureur Maritime et Transport en France • + de 510 collaborateurs | Top Employer 2026 • CA de 580 millions d'euros en 2025 •…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
11Exact matchLondon, United KingdomHQ recorded Nov 6, 2026501-1,000516 contacts →

Exact match

“At SSY, we believe that experience matters.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
12Exact matchAntwerp, BelgiumHQ recorded Nov 6, 202651-200459 contacts →

Exact match

“Bracht Deckers & Mackelbert NV (BDM), opgericht in 1934, is één van de meest gevestigde en gerespecteerde gevolmachtigde onderschrijvers in de Benelux-regio.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
13Exact matchLa Jolla, MN, United StatesHQ recorded Nov 6, 2026501-1,000404 contacts →

Exact match

“Founded in 2014, by a team with deep experience across underwriting, analytics, reinsurance and capital markets, Palomar is an innovative specialty insurer serving residential and…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
14Exact matchTbilisi, GeorgiaHQ recorded Nov 6, 2026501-1,000400 contacts →

Exact match

“ALDAGI was the first insurance company to be founded in the Georgian market in 1990.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
15Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500384 contacts →

Exact match

“Talbot Underwriting Ltd (“Talbot”) is an international insurer and reinsurer operating within the Lloyd’s market through Syndicates 1183 and 2019.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
16Exact matchLondon, United KingdomHQ recorded Nov 6, 2026201-500360 contacts →

Exact match

“At Arch Insurance, we trade how you want to trade.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
17Exact matchAuckland, New ZealandHQ recorded Nov 6, 20261,001-5,000349 contacts →

Exact match

“For more than 165 years, we’ve been helping Kiwi in all lines of work, in all parts of the country, through good times and bad.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
18Exact matchGoldsboro, VA, United StatesHQ recorded Nov 6, 2026201-500337 contacts →

Exact match

“Atlantic Casualty Insurance Company (Atlantic Casualty) was formed by Strickland Insurance Group (SIG) in 1983 to underwrite a substantial book of non-standard personal auto.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
19Exact matchOslo, NorwayHQ recorded Nov 6, 2026201-500326 contacts →

Exact match

“World leading marine insurer, second-to-none service provider.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
20Exact matchRiyadh, Saudi ArabiaHQ recorded Nov 6, 2026201-500279 contacts →

Exact match

“Insurance you can trust Under the Supervision & Regulation of the Insurance Authority متكاملة للتأمين خاضعة لإشراف ورقابة هيئة التأمين.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
21Exact matchRawalpindi, PakistanHQ recorded Nov 6, 2026201-500227 contacts →

Exact match

“Askari General Insurance Company Limited (AGICO) is an Insurance Company under the umbrella of the Army Welfare Trust.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
22Exact matchZurich, SwitzerlandHQ recorded Nov 6, 202651-200223 contacts →

Exact match

“The Nacora Group is a wholly-owned Kuehne + Nagel subsidiary and operates over 40 offices in 30 countries worldwide.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
23Exact matchLondon Ec3m 5bn, United KingdomHQ recorded Nov 6, 2026201-500220 contacts →

Exact match

“Newline Group is a market leading specialty insurance group that operates through three underwriting platforms: Newline Syndicate 1218 at Lloyd’s, Newline Insurance Company…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
24Exact matchGenoa, ItalyHQ recorded Nov 6, 2026201-500217 contacts →

Exact match

“Cambiaso Risso Marine, with its main office in Genoa and further centres of excellence in Italy, Athens, Singapore and Bergen, is a leading insurance broking and consulting…”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase
25Exact matchHong Kong, LuxembourgHQ recorded Nov 6, 202651-200212 contacts →

Exact match

“The Shipowners’ Club is a mutual insurance association.”

Recorded in the RevenueBase company graph · Nov 6, 2026 · View company records in RevenueBase

Showing 25 of 852 marine insurance underwriters worldwide

See the full list, filter by size, metro and specialty, and access 9,809 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Marine insurance underwriters worldwide at a glance

As of Nov 6, 2026
36.2%Verified-email coverage
31.8Average contacts per company
11-50Median size (employees)
11.0%Largest-city concentration · London
Nov 6, 2026Page data refreshed

Companies by employee count

1-10
384
11-50
282
51-200
105
201-500
36
501-1,000
19
1,001-5,000
11
5,001-10,000
1
10001+
2

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 marine insurance underwriters are linked below.
What qualifies
Company records worldwide whose business descriptions match “marine insurance 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. 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 9,809 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 November 6, 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.

Marine insurance underwriters by location

6 lists · largest first

Every Marine insurance underwriters 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 “marine insurance underwriters”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many marine insurance underwriters are there worldwide?

RevenueBase identified 852 company matches for marine insurance underwriters worldwide as of November 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?

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

Which country has the most marine insurance underwriters?

The United Kingdom leads with 159 companies, followed by the United States (142) and Germany (49). Every marine insurance underwriters list by country and city is linked on this page.

Which city has the most marine insurance underwriters?

London leads with 94 company records, followed by Hamburg (26) and Singapore (8).

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 9,809 professional contacts with verified work emails tracked across these 852 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 November 6, 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.