Company lists · Data refreshed September 2026

Top 25 Marine insurance law firms based in the United States

RevenueBase identified 1,088 marine insurance law firms headquartered in the United States as of September 2026 and tracks 22,522 professional contacts across them, including 11,963 with verified work emails and 11,520 with mobile numbers. New York is the largest hub.

This list covers marine insurance law firms 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, how directly it supports the match, and when it was last checked. Data refreshed September 5, 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 HQ checked on every row Match evidence on every row Refreshed Sep 5, 2026 86% judged on-target in blind review
1,088Companies
22,522Contacts tracked
11,963Verified emails
11,520Mobile numbers
Unlock all 1,088 companies Free signup · no credit card · 500 free credits

The 25 largest marine insurance law firms based in the United States

Ranked by team size
Top 25 of 1,088 marine insurance law firms based in the United States, ranked by team size, largest first. Data refreshed Sep 5, 2026. Evidence rates how directly each company's own description names marine insurance law firms: strong (names it), partial (names part of it), indirect (matched on its full profile rather than the summary shown). Click a count to unlock that company's people.
#CompanyHeadquartersEmployeesContacts
1
Marshall DenneheyIndirect evidence
Philadelphia, PA, United StatesHQ checked Sep 5, 20261,001-5,0001,147

“Welcome to our company page!”

Source: company website · checked Sep 5, 2026
2Miami, FL, United StatesHQ checked Sep 5, 20261,001-5,0001,068

“Over the past 25 years, QPWB is one of the fastest-growing law firms in the US.”

Source: company website · checked Sep 5, 2026
3
Phelps Dunbar LLPIndirect evidence
New Orleans, LA, United StatesHQ checked Sep 5, 2026501-1,000824

“As an AmLaw 200 firm, Phelps provides strategic legal counsel to businesses across the South, with 17 offices in the U.S.”

Source: company website · checked Sep 5, 2026
4Columbia, SC, United StatesHQ checked Sep 5, 2026501-1,000576

“MGC is a metrics-driven law built specifically to serve the insurance industry, their insureds and self-insureds.#MGCLaw #TeamMGC”

Source: company website · checked Sep 5, 2026
5
Litchfield Cavo LLPPartial evidence
Chicago, IL, United StatesHQ checked Sep 5, 2026501-1,000424

“Litchfield Cavo LLP began as a small firm of attorneys experienced in insurance and business defense matters.”

Source: company website · checked Sep 5, 2026
6
Morrison Mahoney LLPIndirect evidence
Boston, MA, United StatesHQ checked Sep 5, 2026201-500398

“For 75 years, Morrison Mahoney LLP has been committed to servicing its clients' needs and working with its clients to achieve desired goals and objectives.”

Source: company website · checked Sep 5, 2026
7Ft. Lauderdale, FL, United StatesHQ checked Sep 5, 2026201-500356

“Our verdicts tell the story.™ Luks and Santaniello, LLC is a Corporate and Insurance Defense Litigation firm committed to securing equal justice in the courtroom for…”

Source: company website · checked Sep 5, 2026
8Tampa, FL, United StatesHQ checked Sep 5, 2026201-500329

“Butler is a civil litigation firm.”

Source: company website · checked Sep 5, 2026
9
Margolis EdelsteinIndirect evidence
Philadelphia, PA, United StatesHQ checked Sep 5, 2026201-500277

“Margolis Edelstein was founded in Philadelphia over 65 years ago.”

Source: company website · checked Sep 5, 2026
10
Conroy SimbergStrong evidence
Hollywood, FL, United StatesHQ checked Sep 5, 2026501-1,000277

“Conroy Simberg is a result-oriented insurance defense law firm offering a full range of legal services to insurance companies, self-insured organizations, businesses and…”

Source: company website · checked Sep 5, 2026
11Houston, TX, United StatesHQ checked Sep 5, 2026201-500271

“Schouest, Bamdas, Soshea & BenMaier PLLC is a law firm focused on your needs.”

Source: company website · checked Sep 5, 2026
12
Jones, Skelton & HochuliIndirect evidence
Phoenix, AZ, United StatesHQ checked Sep 5, 202651-200271

“Founded in 1983, Jones, Skelton & Hochuli's 100 trial and appellate attorneys defend insureds, self-insureds, government entities, corporations, and professional liability…”

Source: company website · checked Sep 5, 2026
13
Kiernan Trebach LLPPartial evidence
Washington, DC, United StatesHQ checked Sep 5, 202651-200270

“Kiernan Trebach is a mid-sized law firm with offices throughout the Northeast and Mid-Atlantic regions of the United States – from Maine to Florida.”

Source: company website · checked Sep 5, 2026
14
Weber GallagherPartial evidence
Philadelphia, PA, United StatesHQ checked Sep 5, 2026201-500264

“With more than 160 legal professionals, Weber Gallagher provides counsel to local, national and international businesses, insurance companies and financial institutions in…”

Source: company website · checked Sep 5, 2026
15
Tressler LLPPartial evidence
Chicago, IL, United StatesHQ checked Sep 5, 202651-200237

“Tressler LLP is a national law firm headquartered in Chicago, with ten offices located in six states - California, Illinois, Missouri, New Jersey, New York and Pennsylvania.”

Source: company website · checked Sep 5, 2026
16
Kaufman Borgeest & Ryan LLPIndirect evidence
New York, NY, United StatesHQ checked Sep 5, 2026201-500237

“Kaufman Borgeest & Ryan LLP was founded over twenty years ago, by experienced and nationally recognized defense attorneys dedicated to providing the highest quality legal services…”

Source: company website · checked Sep 5, 2026
17
Clausen Miller P.CIndirect evidence
Chicago, IL, United StatesHQ checked Sep 5, 2026201-500232

“Founded over 80 years ago, Clausen Miller represents businesses, insurers and professionals through strategic, cost-effective litigation and counseling across the nation and…”

Source: company website · checked Sep 5, 2026
18
Mendes & Mount LLPStrong evidence
New York, NY, United StatesHQ checked Sep 5, 202651-200206

“Founded in 1916, Mendes & Mount LLP is one of the largest firms in the country devoted exclusively to the practice of insurance law.”

Source: company website · checked Sep 5, 2026
19Miami, FL, United StatesHQ checked Sep 5, 2026201-500192

“Hamilton, Miller & Birthisel, LLP is an AV rated, minority certified law firm based in Florida with offices throughout the state and in Kingston, Jamaica and the U.S.”

Source: company website · checked Sep 5, 2026
20Melville, NY, United StatesHQ checked Sep 5, 2026n/a192

“L’Abbate, Balkan, Colavita & Contini, L.L.P.”

Source: company website · checked Sep 5, 2026
21
Zelle LLPPartial evidence
Minneapolis, MN, United StatesHQ checked Sep 5, 202651-200179

“Zelle LLP is an international litigation and dispute resolution law firm with offices in Atlanta, Boston, Dallas, Fort Lauderdale, London, Minneapolis, New York, Oakland…”

Source: company website · checked Sep 5, 2026
22
Semmes, Bowen & SemmesPartial evidence
Baltimore, MD, United StatesHQ checked Sep 5, 202651-200169

“Semmes is one of the oldest and largest full-service law firms in the State of Maryland.”

Source: company website · checked Sep 5, 2026
23
Anderson KillStrong evidence
New York, NY, United StatesHQ checked Sep 5, 202651-200161

“Anderson Kill is a full-service corporate law firm best known for its work in insurance recovery.”

Source: company website · checked Sep 5, 2026
24
Zausmer, P.CIndirect evidence
Farmington Hills, MI, United StatesHQ checked Sep 5, 202651-200160

“We are committed to innovating and evolving, but our vision remains a constant.”

Source: company website · checked Sep 5, 2026
25
Gallo Vitucci Klar LLPIndirect evidence
New York, NY, United StatesHQ checked Sep 5, 202651-200159

“Gallo Vitucci Klar LLP is a full service litigation firm consisting of more than 130 attorneys and having an extensive practice dedicated to providing experienced and innovative…”

Source: company website · checked Sep 5, 2026

Showing 25 of 1,088 marine insurance law firms based in the United States

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Marine insurance law firms based in the United States at a glance

As of Sep 5, 2026
1-10Median size (employees)
New YorkLargest hub · 60 HQs
11,520Contacts with mobile numbers
Sep 5, 2026Data refreshed

Companies by employee count

1-10
547
11-50
405
51-200
107
201-500
16
501-1,000
7
1,001-5,000
2

Verified emails by last verification

0–30
11,176
31–60
740
61–90
3
90–180
7
180+
37

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 insurance law firms, so some rows will be adjacent to the category rather than pure plays. The description and evidence 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 SmartSearch, 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 “marine insurance law firms”. Matching reads each company's description, not its industry code or its name.
What we exclude
Companies whose own description does not clearly place them among marine insurance law firms, 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 an evidence 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, 11,963 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 5, 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

How many marine insurance law firms are there based in the United States?

RevenueBase identified 1,088 marine insurance law firms 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?

Marshall Dennehey, headquartered in Philadelphia, tops this list with the largest team on record.

Which city has the most marine insurance law firms?

New York leads with 60 headquartered companies, followed by New Orleans (52) and Miami (49).

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 11,963 verified decision-maker contacts tracked across these 1,088 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 5, 2026.

Ready to reach these companies? Verified emails and direct dials for all 1,088 marine insurance law firms based in the United States. Start with a free account, no credit card.

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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.