Company lists · Data refreshed October 2026

Top 25 Marine liability insurance companies based in the United States

RevenueBase identified 87 company matches for marine liability insurance companies associated with the United States as of October 2026 and tracks 931 professional contacts across them, including 414 with verified work emails. New York is the largest hub.

This list covers company matches for marine liability insurance companies associated with the United States, 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 October 18, 2026.

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 Oct 18, 2026 How this list was built
87Companies
931Contacts tracked
414Verified emails
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The 25 largest marine liability insurance companies based in the United States

Ranked by team size
Top 25 of 87 company matches for marine liability insurance companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Oct 18, 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 matchMobile, AL, United StatesHQ recorded Oct 18, 202651-200168 contacts →

Exact match

“The American Equity Underwriters, Inc.(AEU) delivers specialized coverage and risk management solutions to waterfront employers across the United States.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
2Exact matchJersey City, NJ, United StatesHQ recorded Oct 18, 202611-5090 contacts →

Exact match

“At EIMC, we are the trusted partner for marine insurance and global supply chain communities worldwide.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
3Exact matchNew York, NY, United StatesHQ recorded Oct 18, 202651-20057 contacts →

Exact match

“Founded in New York in 1917, celebrating 106 years of service, the American Club is the only P&I mutual domiciled in the Americas.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
4Exact matchNew York, NY, United StatesHQ recorded Oct 18, 2026201-50051 contacts →

Exact match

“International Marine Underwriters (IMU) traces its roots to the early 1900s, and offers a full range of ocean and inland marine insurance solutions.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
5Exact matchNew York, NY, United StatesHQ recorded Oct 18, 202611-5045 contacts →

Exact match

“Berkley Offshore is an insurance provider specialising in Energy Upstream, Energy Liability and Marine Insurance.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
6Exact matchChicago, IL, United StatesHQ recorded Oct 18, 2026201-50044 contacts →

Exact match

“Old Republic Inland Marine is a collaborative team of highly specialized, experienced underwriters with the authority to deliver thoughtful, timely underwriting decisions for…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
7Exact matchWestbrook, CT, United StatesHQ recorded Oct 18, 202651-20041 contacts →

Exact match

“Our history dates back to the early 1990’s, when Maritime General Agency and Marine MGA were founded.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
8Exact matchFort Lauderdale, FL, United StatesHQ recorded Oct 18, 202611-5040 contacts →

Exact match

“MHG Insurance is a leading insurance brokerage providing insurance advice and solutions for seafarers, businesses and groups and individuals around the world.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
9Exact matchSan Diego, CA, United StatesHQ recorded Oct 18, 202611-5023 contacts →

Exact match

“Established in 1978, we are a family run and fourth generation yacht insurance agency with offices in San Diego, Fort Lauderdale, and Kona.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
10Exact matchSarasota, FL, United StatesHQ recorded Oct 18, 202611-5020 contacts →

Exact match

“NBOA Marine Insurance is one of the largest boat insurance agencies in the country.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
11Exact matchCovington, LA, United StatesHQ recorded Oct 18, 202611-5018 contacts →

Exact match

“Continental Underwriters, Ltd, provides all classes of commercial marine insurance coverages.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
12Exact matchLynnfield, MA, United StatesHQ recorded Oct 18, 202611-5017 contacts →

Exact match

“International Special Risks, Inc.(ISR), with offices from Maine to Florida, is the largest Marine intermediary insurance broker on the East Coast.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
13Exact matchRiviera Beach, FL, United StatesHQ recorded Oct 18, 202611-5013 contacts →

Exact match

“Seven Seas Insurance Company specializes in cargo insurance.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
14Exact matchWest Palm Beach, FL, United StatesHQ recorded Oct 18, 20261-1010 contacts →

Exact match

“AMG Insurance International was established to fill the relationship gap in the marine insurance industry.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
15Exact matchFort Lauderdale, FL, United StatesHQ recorded Oct 18, 20261-108 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
16Exact matchDanville, CA, United StatesHQ recorded Oct 18, 202611-507 contacts →

Exact match

“Founded in 1989 by Hillary Swiggett, Boater’s Insurance Agency, Inc.(BIA) is a family owned and operated agency that specializes in providing insurance products and services…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
17Exact matchMahwah, NJ, United StatesHQ recorded Oct 18, 20261-107 contacts →

Exact match

“Capacity Marine Corporation is an insurance company based out of 1 International Blvd, Mahwah, New Jersey, United States.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
18Exact matchNew York, NY, United StatesHQ recorded Oct 18, 202611-506 contacts →

Exact match

“NICOLETTI HORNIG & SWEENEY is internationally recognized as one of the leading law firms in the United States in marine insurance, shipping and transportation litigation, and…”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
19Exact matchSummit, NJ, United StatesHQ recorded Oct 18, 202651-2005 contacts →

Exact match

“If you serve the recreational boating market, you and your clients deserve insurance that is as extensive as the products and services you provide.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
20Exact matchBothell, WA, United StatesHQ recorded Oct 18, 20261-105 contacts →

Exact match

“We are specialty marine insurance brokers serving the United States, with an emphasis on the Southeastern U.S, Pacific Northwest and Alaska.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
21Exact matchVentura, CA, United StatesHQ recorded Oct 18, 20261-105 contacts →

Exact match

“Our Founder is a former Merchant Mariner and we've stayed true to our marine roots.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
22Exact matchHouston, TX, United StatesHQ recorded Oct 18, 20261-105 contacts →

Exact match

“Southern Marine is a marine insurance specialist headquartered in Houston, Texas.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
23Exact matchSt. Petersburg, FL, United StatesHQ recorded Oct 18, 20261-105 contacts →

Exact match

Recorded description not available.

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
24Exact matchNewport Beach, CA, United StatesHQ recorded Oct 18, 20261-104 contacts →

Exact match

“Hayden Insurance Svc.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase
25Exact matchNewport Beach, CA, United StatesHQ recorded Oct 18, 202611-503 contacts →

Exact match

“Founded in 1959, Mariners® General Insurance Group has maintained a commitment to provide not only the best insurance, but the right insurance for your yacht or marine business.”

Recorded in the RevenueBase company graph · Oct 18, 2026 · View company records in RevenueBase

Showing 25 of 87 marine liability insurance companies based in the United States

See the full list, filter by size, metro and specialty, and access 414 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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Marine liability insurance companies based in the United States at a glance

As of Oct 18, 2026
44.5%Verified-email coverage
10.7Average contacts per company
1-10Median size (employees)
8.0%Largest-city concentration · New York
Oct 18, 2026Page data refreshed

Companies by employee count

1-10
52
11-50
25
51-200
6
201-500
3
501-1,000
1

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 87 companies.

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.
What qualifies
Company records associated with the United States whose business descriptions match “marine liability insurance 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. Where headquarters information is recorded, preview rows are also filtered to this page’s location. 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 414 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 October 18, 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.

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

How many marine liability insurance companies are there based in the United States?

RevenueBase identified 87 company matches for marine liability insurance companies associated with the United States as of October 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?

The American Equity Underwriters, INC tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most marine liability insurance companies?

New York leads with 7 company records, followed by Miami (6) and Fort Lauderdale (3).

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 414 professional contacts with verified work emails tracked across these 87 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 October 18, 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.