Company lists · Data refreshed September 2026

Top 25 Maritime insurance companies worldwide

Name: Maritime insurance companies worldwide
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 768 companies tracked

RevenueBase identified 768 maritime insurance companies worldwide as of September 2026 and tracks 22,067 professional contacts across them, including 9,072 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers maritime insurance companies 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 17, 2026. Country and city lists for maritime insurance companies 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.

How to read this list HQ checked on every row RevenueBase Smart Search rating on every row Refreshed Sep 17, 2026 86% judged on-target in blind review

768Companies

22,067Contacts tracked

9,072Verified emails

0Mobile numbers

Explore this list → Free signup · no credit card · 500 free credits

The 25 largest maritime insurance companies worldwide

Ranked by team size

Top 25 of 768 maritime insurance companies worldwide, ranked by team size, largest first. Data refreshed Sep 17, 2026. RevenueBase Smart Search rates how each company's information relates to maritime insurance companies: 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	STARR	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,060 contacts →
	Indirect evidence “With 100+ years of experience across leading industries, We apply an innovation mindset, agile approach, And a global team with local expertise wherever you operate.” Source: RevenueBase Database · checked Sep 17, 2026
2	Beazley	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	1,001-5,000	2,564 contacts →
	Indirect 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 17, 2026
3	Sompo Seguros	Partial evidence	Sao Paulo, BrazilHQ checked Sep 17, 2026	501-1,000	1,844 contacts →
	Partial evidence “Sompo Seguros S.A is a subsidiary of Sompo International, the company responsible for the insurance and reinsurance operations of the Sompo Holdings Group outside Japan.” Source: RevenueBase Database · checked Sep 17, 2026
4	American Modern Insurance Group	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,113 contacts →
	Partial evidence “American Modern provides insurance solutions for customers who need coverage not readily found in the general market.” Source: RevenueBase Database · checked Sep 17, 2026
5	Core Specialty Insurance Holdings, INC	Partial evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	635 contacts →
	Partial evidence “Core Specialty, through its subsidiary insurers, offers a diversified range of property, casualty, and marine insurance products for small to mid-sized businesses.” Source: RevenueBase Database · checked Sep 17, 2026
6	Northstandard	Indirect evidence	Newcastle Upon Tyne, United KingdomHQ checked Sep 17, 2026	501-1,000	584 contacts →
	Indirect evidence “The home of NorthStandard updates.” Source: RevenueBase Database · checked Sep 17, 2026
7	Helvetia Insurance France	Partial evidence	Le Havre, FranceHQ checked Sep 17, 2026	501-1,000	532 contacts →
	Partial evidence “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 •…” Source: RevenueBase Database · checked Sep 17, 2026
8	FF Seguros	Indirect evidence	São Paulo, BrazilHQ checked Sep 17, 2026	201-500	501 contacts →
	Indirect evidence “A FF Seguros é parte do Grupo Fairfax Financial Holdings, com sede no Canadá e presença global há mais de 35 anos.” Source: RevenueBase Database · checked Sep 17, 2026
9	SSY	Indirect evidence	London, United KingdomHQ checked Sep 17, 2026	501-1,000	449 contacts →
	Indirect evidence “At SSY, we believe that experience matters.” Source: RevenueBase Database · checked Sep 17, 2026
10	Unison Insurance Broking Services PVT LTD	Partial evidence	Vadodara, IndiaHQ checked Sep 17, 2026	201-500	358 contacts →
	Partial evidence “UNISON was established on the basic principle of creating transparency and convenience in the otherwise opaque and cumbersome practices in the Insurance Market in India.” Source: RevenueBase Database · checked Sep 17, 2026
11	Atlantic Casualty Insurance CO	Partial evidence	Goldsboro, NC, United StatesHQ checked Sep 17, 2026	201-500	335 contacts →
	Partial evidence “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.” Source: RevenueBase Database · checked Sep 17, 2026
12	Arch Insurance UK Limited	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	201-500	330 contacts →
	Partial evidence “At Arch Insurance, we trade how you want to trade.” Source: RevenueBase Database · checked Sep 17, 2026
13	Falvey Insurance Group	Partial evidence	North Kingstown, RI, United StatesHQ checked Sep 17, 2026	51-200	228 contacts →
	Partial evidence “Falvey Insurance Group is one group with many solutions.” Source: RevenueBase Database · checked Sep 17, 2026
14	Cambiaso Risso Group	Partial evidence	Genoa, ItalyHQ checked Sep 17, 2026	201-500	189 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 17, 2026
15	Post & CO	Partial evidence	Rotterdam, NetherlandsHQ checked Sep 17, 2026	n/a	176 contacts →
	Partial evidence “Post & Co is a fourth generation, family owned and fully independent underwriting agent and insurance intermediary, specialised in marine liabilities, multimodal transport…” Source: RevenueBase Database · checked Sep 17, 2026
16	Filhet-Allard Maritime	Strong evidence	33735, FranceHQ checked Sep 17, 2026	51-200	159 contacts →
	Strong evidence “Sector of activity: Marine Insurance Brokerage Our slogan “At the heart of International Trade, Shipping & Industry” reflects the vision of FILHET-ALLARD MARITIME (FAM)…” Source: RevenueBase Database · checked Sep 17, 2026
17	The American Equity Underwriters, INC	Indirect evidence	Mobile, AL, United StatesHQ checked Sep 17, 2026	51-200	159 contacts →
	Indirect evidence “The American Equity Underwriters, Inc.(AEU) delivers specialized coverage and risk management solutions to waterfront employers across the United States.” Source: RevenueBase Database · checked Sep 17, 2026
18	W K Webster And CO LTD	Indirect evidence	Sidcup, United KingdomHQ checked Sep 17, 2026	201-500	140 contacts →
	Indirect evidence “Since 1861, W K Webster & Co Ltd has built up an impressive reputation for excellence in the field of marine & transit claims consultancy worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
19	Club Marine Insurance	Partial evidence	Melbourne, AustraliaHQ checked Sep 17, 2026	51-200	111 contacts →
	Partial evidence “As Australia’s largest boat insurance provider, we have been protecting the needs of Australian boaties since 1959 and know what’s important when it comes to boat insurance.” Source: RevenueBase Database · checked Sep 17, 2026
20	Banchero Costa Network	Partial evidence	Genoa (genova), ItalyHQ checked Sep 17, 2026	51-200	103 contacts →
	Partial evidence “Established in 1968, banchero costa is one of the world's leading brokerage houses in the maritime sector offering a full range of services to the global shipping industry.” Source: RevenueBase Database · checked Sep 17, 2026
21	Lockton P.L. Ferrari	Indirect evidence	Genoa, ItalyHQ checked Sep 17, 2026	51-200	102 contacts →
	Indirect evidence “P.L.” Source: RevenueBase Database · checked Sep 17, 2026
22	Áthina Administradora E Corretora DE Seguros	Indirect evidence	Blumenau, BrazilHQ checked Sep 17, 2026	51-200	95 contacts →
	Indirect evidence “A Áthina Administradora e Corretora de Seguros Ltda.” Source: RevenueBase Database · checked Sep 17, 2026
23	G.H. Dunn Insurance Agency, INC	Partial evidence	Mattapoisett, MA, United StatesHQ checked Sep 17, 2026	11-50	93 contacts →
	Partial evidence “Award winning Insurance Agency, founded in 1927.” Source: RevenueBase Database · checked Sep 17, 2026
24	EIMC	Partial evidence	Jersey City, NJ, United StatesHQ checked Sep 17, 2026	11-50	87 contacts →
	Partial evidence “At EIMC, we are the trusted partner for marine insurance and global supply chain communities worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
25	Georg Duncker	Strong evidence	Hamburg, GermanyHQ checked Sep 17, 2026	51-200	81 contacts →
	Strong evidence “GEORG DUNCKER is one of the largest independent and privately-owned marine insurance brokers with more than 150 years of successful operation in the maritime sector.” Source: RevenueBase Database · checked Sep 17, 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: maritime insurance companies. 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 maritime insurance companies.
Partial evidence: Its own public description names part of maritime insurance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name maritime insurance companies. 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 768 maritime insurance companies worldwide

See the full list, filter by size, metro and specialty, and get verified emails and direct dials for all 9,072 reachable decision-makers.

Free signup · no credit card

View the full list →

Maritime insurance companies worldwide at a glance

As of Sep 17, 2026

41.1%Verified-email coverage

28.7Average contacts per company

1-10Median size (employees)

9.1%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

384

11-50

255

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 maritime insurance companies, 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: 11 countries, largest first: the United States, the United Kingdom, Brazil, Germany, France, Greece, Italy, the Netherlands, India, Australia and 1 more. Country and city lists for maritime insurance companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “maritime insurance companies”. 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 maritime insurance companies), 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 maritime insurance companies, 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, 9,072 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 17, 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.

Maritime insurance companies by location

11 lists · largest first

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

Countries

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 maritime insurance companies, 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 maritime insurance companies are there worldwide?

RevenueBase identified 768 maritime insurance companies 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?

STARR, headquartered in New York, tops this list with the largest team on record.

Which country has the most maritime insurance companies?

The United States leads with 208 companies, followed by the United Kingdom (149) and Brazil (82). Every maritime insurance companies list by country and city is linked on this page.

Which city has the most maritime insurance companies?

London leads with 70 headquartered companies, followed by Hamburg (34) and Sao Paulo (17).

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 9,072 verified decision-maker contacts tracked across these 768 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 17, 2026.

Ready to reach these companies? Verified emails and direct dials for all 768 maritime insurance companies worldwide. Start with a free account, no credit card.

Download this list →

Related lists

Browse the directory

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.