Company lists · Data refreshed September 2026

Top 25 Maritime insurance companies based in the United States

Name: Maritime insurance companies based in the United States
Creator: RevenueBase
License: https://creativecommons.org/licenses/by/4.0/

Compiled by the RevenueBase Data Team Data refreshed Sep 17, 2026 208 companies tracked

RevenueBase identified 208 maritime insurance companies headquartered in the United States as of September 2026 and tracks 7,913 professional contacts across them, including 4,200 with verified work emails. New York is the largest hub.

This list covers maritime insurance companies headquartered in the United States, 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.

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

208Companies

7,913Contacts tracked

4,200Verified emails

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The 25 largest maritime insurance companies based in the United States

Ranked by team size

Top 25 of 208 maritime insurance companies based in the United States, 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	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
3	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
4	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
5	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
6	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
7	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
8	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
9	Discovery Health MD	Partial evidence	Seattle, WA, United StatesHQ checked Sep 17, 2026	201-500	65 contacts →
	Partial evidence “Discovery Health is a medical risk management service for the commercial maritime industry, serving the men and women who make their living at sea.” Source: RevenueBase Database · checked Sep 17, 2026
10	Berkley Fire & Marine A Berkley Company	Indirect evidence	Schaumburg, IL, United StatesHQ checked Sep 17, 2026	5,001-10,000	62 contacts →
	Indirect evidence “Berkley Fire & Marine was launched in 2013 and is a Berkley company offering preferred inland marine and related property risks and services.” Source: RevenueBase Database · checked Sep 17, 2026
11	Alive Risk	Partial evidence	Minneapolis, MN, United StatesHQ checked Sep 17, 2026	51-200	53 contacts →
	Partial evidence “The Alive Risk programs provide access to specialty insurance coverage for today’s most demanding amusement, entertainment, special events and sports & leisure industries.” Source: RevenueBase Database · checked Sep 17, 2026
12	Parsyl	Indirect evidence	Denver, CO, United StatesHQ checked Sep 17, 2026	11-50	53 contacts →
	Indirect evidence “Parsyl is an insurer of complex supply chains with a mission to underwrite for impact by combining underwriting excellence with modern technology to guide customers toward more…” Source: RevenueBase Database · checked Sep 17, 2026
13	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
14	International Marine Underwriters	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	201-500	49 contacts →
	Partial 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
15	Global Marine Insurance Agency	Partial evidence	Traverse City, MI, United StatesHQ checked Sep 17, 2026	51-200	48 contacts →
	Partial 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
16	Berkley Offshore Underwriting Managers A Berkley Company	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	11-50	44 contacts →
	Partial evidence “Berkley Offshore is an insurance provider specialising in Energy Upstream, Energy Liability and Marine Insurance.” Source: RevenueBase Database · checked Sep 17, 2026
17	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
18	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
19	Ascot U.S	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	201-500	41 contacts →
	Indirect evidence “At Ascot U.S, we are offering specialty solutions at scale: we understand our markets, we strive to maintain the highest level of expertise in our fields, and we are laser-focused…” Source: RevenueBase Database · checked Sep 17, 2026
20	OLD Republic Inland Marine	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	201-500	37 contacts →
	Indirect 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
21	Cargocorp Underwriters	Partial evidence	Miami, FL, United StatesHQ checked Sep 17, 2026	51-200	37 contacts →
	Partial 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
22	Cable Insurance Company	Partial evidence	Fort Lauderdale, FL, United StatesHQ checked Sep 17, 2026	11-50	36 contacts →
	Partial evidence “Welcome to Cable Insurance Company - Your Trusted Partner in Commercial Transport Insurance and much more!” Source: RevenueBase Database · checked Sep 17, 2026
23	RB Jones	Indirect evidence	Farmington Hills, MI, United StatesHQ checked Sep 17, 2026	501-1,000	34 contacts →
	Indirect 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
24	Logistiq Insurance Solutions	Partial evidence	Redondo Beach, CA, United StatesHQ checked Sep 17, 2026	11-50	33 contacts →
	Partial evidence “LOGISTIQ Insurance Solutions is a long-standing transportation insurance specialist.” Source: RevenueBase Database · checked Sep 17, 2026
25	Griffin Underwriting Services	Partial evidence	Bellevue, WA, United StatesHQ checked Sep 17, 2026	51-200	29 contacts →
	Partial evidence “Griffin Underwriting Services enables retail insurance agents and brokers to compete and win on hard-to-place risks.” 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 208 maritime insurance companies based in the United States

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Maritime insurance companies based in the United States at a glance

As of Sep 17, 2026

53.1%Verified-email coverage

38.0Average contacts per company

1-10Median size (employees)

6.7%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

105

11-50

51-200

201-500

501-1,000

1,001-5,000

5,001-10,000

Email recency for this list is measured worldwide rather than for United States, so it is reported there. Company counts and contact totals on this page are exact for United States, over 208 companies.

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.
What qualifies: Companies headquartered in the United States 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. Companies headquartered outside United States are excluded even when they keep an office there.
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, 4,200 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.

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 based in the United States?

RevenueBase identified 208 maritime insurance companies headquartered in the United States 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 city has the most maritime insurance companies?

New York leads with 14 headquartered companies, followed by Miami (11) and Fort Lauderdale (9).

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 4,200 verified decision-maker contacts tracked across these 208 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.