Company lists · Data refreshed September 2026

Top 25 Marine casualty insurance companies worldwide

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

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 231 companies tracked

RevenueBase identified 231 marine casualty insurance companies worldwide as of September 2026 and tracks 4,067 professional contacts across them, including 1,724 with verified work emails and 0 with mobile numbers. The United States is the largest market and London the largest hub.

This list covers marine casualty 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 marine casualty 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

231Companies

4,067Contacts tracked

1,724Verified emails

0Mobile numbers

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The 25 largest marine casualty insurance companies worldwide

Ranked by team size

Top 25 of 231 marine casualty 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 marine casualty 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	Core Specialty Insurance Holdings, INC	Strong evidence	Cincinnati, OH, United StatesHQ checked Sep 17, 2026	1,001-5,000	635 contacts →
	Strong 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
2	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
3	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
4	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
5	EIMC	Strong evidence	Jersey City, NJ, United StatesHQ checked Sep 17, 2026	11-50	87 contacts →
	Strong evidence “At EIMC, we are the trusted partner for marine insurance and global supply chain communities worldwide.” Source: RevenueBase Database · checked Sep 17, 2026
6	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
7	Pantaenius Gmbh	Partial evidence	Hamburg, GermanyHQ checked Sep 17, 2026	201-500	81 contacts →
	Partial evidence “For 40 years Pantaenius has been providing yacht insurance to yacht owners all over the world.” Source: RevenueBase Database · checked Sep 17, 2026
8	TT Club	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	80 contacts →
	Partial evidence “TT Club is the international transport and logistics industry’s leading provider of insurance and related risk management services.” Source: RevenueBase Database · checked Sep 17, 2026
9	London P&i	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	51-200	71 contacts →
	Partial evidence “London P&I is a leading, globally connected, mutual marine insurer our members can depend on.” Source: RevenueBase Database · checked Sep 17, 2026
10	American P&i Club	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	51-200	52 contacts →
	Indirect evidence “Founded in New York in 1917, celebrating 106 years of service, the American Club is the only P&I mutual domiciled in the Americas.” Source: RevenueBase Database · checked Sep 17, 2026
11	International Marine Underwriters	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	201-500	49 contacts →
	Strong evidence “International Marine Underwriters (IMU) traces its roots to the early 1900s, and offers a full range of ocean and inland marine insurance solutions.” Source: RevenueBase Database · checked Sep 17, 2026
12	Global Marine Insurance Agency	Strong evidence	Traverse City, MI, United StatesHQ checked Sep 17, 2026	51-200	48 contacts →
	Strong evidence “Global Marine Insurance Agency, a division of Specialty Program Group LLC provides specialized insurance solutions to boat, yacht and marine business owners.” Source: RevenueBase Database · checked Sep 17, 2026
13	Berkley Offshore Underwriting Managers A Berkley Company	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	44 contacts →
	Strong evidence “Berkley Offshore is an insurance provider specialising in Energy Upstream, Energy Liability and Marine Insurance.” Source: RevenueBase Database · checked Sep 17, 2026
14	MHG Insurance	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 17, 2026	11-50	43 contacts →
	Partial evidence “MHG Insurance is a leading insurance brokerage providing insurance advice and solutions for seafarers, businesses and groups and individuals around the world.” Source: RevenueBase Database · checked Sep 17, 2026
15	One80 Marine	Partial evidence	Westbrook, CT, United StatesHQ checked Sep 17, 2026	51-200	42 contacts →
	Partial evidence “Our history dates back to the early 1990’s, when Maritime General Agency and Marine MGA were founded.” Source: RevenueBase Database · checked Sep 17, 2026
16	OLD Republic Inland Marine	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	37 contacts →
	Partial evidence “Old Republic Inland Marine is a collaborative team of highly specialized, experienced underwriters with the authority to deliver thoughtful, timely underwriting decisions for…” Source: RevenueBase Database · checked Sep 17, 2026
17	LIG Marine Managers	Partial evidence	St Petersburg, FL, RussiaHQ checked Sep 17, 2026	11-50	37 contacts →
	Partial evidence “LIG Marine Managers is a Commercial Marine and Longshore MGA and Lloyd's Broker, helping agents confidently place hard-to-place marine and Longshore risks without adding…” Source: RevenueBase Database · checked Sep 17, 2026
18	Cargocorp Underwriters	Strong evidence	Miami, FL, United StatesHQ checked Sep 17, 2026	51-200	37 contacts →
	Strong evidence “Supply to our customers in the insurance industry, Reinsurance capacity in ALL MARINE LINES, with an INTEGRAL RISK MANAGEMENT PROGRAM across the entire logistics chain.” Source: RevenueBase Database · checked Sep 17, 2026
19	RB Jones	Partial evidence	Farmington Hills, MI, United StatesHQ checked Sep 17, 2026	501-1,000	34 contacts →
	Partial evidence “Founded in 1905, RB Jones is a leader in providing specialty risk coverage solutions to brokers, agents and wholesalers, including: Commercial Marine, Excess Energy, Commercial…” Source: RevenueBase Database · checked Sep 17, 2026
20	International Union Of Marine Insurance Iumi	Strong evidence	Hamburg, GermanyHQ checked Sep 17, 2026	n/a	34 contacts →
	Strong evidence “The International Union of Marine Insurance e.V.(IUMI) is a non-profit association established for the purpose of protecting, safeguarding and advancing insurers' interests in…” Source: RevenueBase Database · checked Sep 17, 2026
21	The Meco Group	Strong evidence	London, United KingdomHQ checked Sep 17, 2026	11-50	33 contacts →
	Strong evidence “Marine insurance delivered properly.” Source: RevenueBase Database · checked Sep 17, 2026
22	Atlantic Insurance & Reinsurance Brokers	Strong evidence	Madrid London Miami Bogota Houston Santiago De Chile, SpainHQ checked Sep 17, 2026	51-200	27 contacts →
	Strong evidence “ATLANTIC started as a P&I correspondent and we are proud to say that we were encouraged by shipowners and other stakeholders to expand into marine insurance broking.” Source: RevenueBase Database · checked Sep 17, 2026
23	Navium Marine Limited	Partial evidence	London, United KingdomHQ checked Sep 17, 2026	1-10	25 contacts →
	Partial evidence “Navium started trading in May 2021 and was formed as a result of a partnership between Clive Washbourn (CEO), Pine Walk Capital Limited, and Fidelis Insurance Holdings Limited.” Source: RevenueBase Database · checked Sep 17, 2026
24	Clearwater Dynamics	Indirect evidence	Poole, United KingdomHQ checked Sep 17, 2026	11-50	24 contacts →
	Indirect evidence “Clearwater Dynamics delivers industry‑leading technology solutions specialising in IoT connectivity, vessel tracking, and risk‑mitigation.” Source: RevenueBase Database · checked Sep 17, 2026
25	Oversea Insurance Agency	Partial evidence	San Diego, CA, United StatesHQ checked Sep 17, 2026	11-50	23 contacts →
	Partial evidence “Established in 1978, we are a family run and fourth generation yacht insurance agency with offices in San Diego, Fort Lauderdale, and Kona.” 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: marine casualty 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 marine casualty insurance companies.
Partial evidence: Its own public description names part of marine casualty insurance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name marine casualty 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 231 marine casualty insurance companies worldwide

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Marine casualty insurance companies worldwide at a glance

As of Sep 17, 2026

42.4%Verified-email coverage

17.6Average contacts per company

1-10Median size (employees)

18.2%Largest-city concentration · London

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

122

11-50

51-200

201-500

501-1,000

1,001-5,000

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 marine casualty 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: 3 countries, largest first: the United States, the United Kingdom, Germany. Country and city lists for marine casualty insurance companies are linked below.
What qualifies: Companies worldwide whose own description of what they do matches “marine casualty 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 marine casualty 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 marine casualty 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, 1,724 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.

Marine casualty insurance companies by location

3 lists · largest first

Every Marine casualty 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 marine casualty 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 marine casualty insurance companies are there worldwide?

RevenueBase identified 231 marine casualty 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?

Core Specialty Insurance Holdings, INC, headquartered in Cincinnati, tops this list with the largest team on record.

Which country has the most marine casualty insurance companies?

The United States leads with 116 companies, followed by the United Kingdom (78) and Germany (37). Every marine casualty insurance companies list by country and city is linked on this page.

Which city has the most marine casualty insurance companies?

London leads with 42 headquartered companies, followed by Hamburg (23) and Miami (8).

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 1,724 verified decision-maker contacts tracked across these 231 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.

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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.