Company lists · Data refreshed September 2026

Top 25 Public liability insurance underwriters based in the United States

Name: Public liability insurance underwriters 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 1,218 companies tracked

RevenueBase identified 1,218 public liability insurance underwriters headquartered in the United States as of September 2026 and tracks 124,815 professional contacts across them, including 55,029 with verified work emails. New York is the largest hub.

This list covers public liability insurance underwriters 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

1,218Companies

124,815Contacts tracked

55,029Verified emails

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The 25 largest public liability insurance underwriters based in the United States

Ranked by team size

Top 25 of 1,218 public liability insurance underwriters 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 public liability insurance underwriters: 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	Travelers	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	10001+	32,682 contacts →
	Partial evidence “Travelers provides insurance coverage to protect the things that are important to you – your home, your car, your valuables and your business.” Source: RevenueBase Database · checked Sep 17, 2026
2	Amwins	Partial evidence	Charlotte, NC, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,926 contacts →
	Partial evidence “Amwins is the largest wholesale distributor of specialty insurance products and services in the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
3	Amtrust Financial Services, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	5,001-10,000	4,734 contacts →
	Partial evidence “AmTrust Financial Services, Inc, through its subsidiaries, operates as a multinational property and casualty insurance company.” Source: RevenueBase Database · checked Sep 17, 2026
4	Everest	Partial evidence	Warren, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,411 contacts →
	Partial evidence “Everest Group, Ltd.(“Everest”) is a global underwriting leader providing best-in-class property, casualty, and specialty reinsurance and insurance solutions that address…” Source: RevenueBase Database · checked Sep 17, 2026
5	Markel	Partial evidence	Glen Allen, VA, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,151 contacts →
	Partial evidence “As the insurance operations within the Markel Group Inc.(NYSE: MKL), we leverage a broad array of capabilities and expertise to create intelligent solutions for the most complex…” Source: RevenueBase Database · checked Sep 17, 2026
6	Mcgriff	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 17, 2026	1,001-5,000	3,021 contacts →
	Indirect evidence “When it comes to protecting what matters most in business and everyday life, at McGriff we believe our clients should never settle for less than the best.” Source: RevenueBase Database · checked Sep 17, 2026
7	RT Specialty	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,955 contacts →
	Partial evidence “RT Specialty is a leading wholesale distributor of specialty insurance products and services and the wholesale broking specialty for Ryan Specialty.” Source: RevenueBase Database · checked Sep 17, 2026
8	Arch Insurance Group INC	Partial evidence	Jersey City, NJ, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,704 contacts →
	Partial evidence “Arch Insurance Group Inc, a division of Arch Capital Group Ltd.(ACGL), is a market-leading specialty insurer.” Source: RevenueBase Database · checked Sep 17, 2026
9	Tokio Marine HCC	Indirect evidence	Houston, TX, United StatesHQ checked Sep 17, 2026	1,001-5,000	2,006 contacts →
	Indirect evidence “Tokio Marine HCC focuses on what matters most; our people.” Source: RevenueBase Database · checked Sep 17, 2026
10	QBE North America	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	10001+	1,883 contacts →
	Indirect evidence “At QBE we’re driven by our purpose of enabling a more resilient future.” Source: RevenueBase Database · checked Sep 17, 2026
11	Berkshire Hathaway Specialty Insurance	Partial evidence	Boston, MA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,799 contacts →
	Partial evidence “Berkshire Hathaway Specialty Insurance is an organization committed to providing long-term risk solutions and claims care to our customers backed by the financial strength of…” Source: RevenueBase Database · checked Sep 17, 2026
12	Broadspire	Indirect evidence	Peachtree Corners, GA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,658 contacts →
	Indirect evidence “Broadspire offers risk management solutions designed to help clients achieve their unique goals, increase employee productivity, and reduce costs.” Source: RevenueBase Database · checked Sep 17, 2026
13	RLI Insurance Company	Indirect evidence	Peoria, IL, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,386 contacts →
	Indirect evidence “RLI is a U.S-based specialty insurer that serves niche property, casualty and surety markets.” Source: RevenueBase Database · checked Sep 17, 2026
14	USLI	Partial evidence	Wayne, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,314 contacts →
	Partial evidence “We aspire to be the very best insurance company at underwriting insurance products for our customers.” Source: RevenueBase Database · checked Sep 17, 2026
15	Esis, INC	Indirect evidence	Philadelphia, PA, United StatesHQ checked Sep 17, 2026	1,001-5,000	1,262 contacts →
	Indirect evidence “ESIS®, Inc.” Source: RevenueBase Database · checked Sep 17, 2026
16	Capspecialty	Strong evidence	Middleton, WI, United StatesHQ checked Sep 17, 2026	201-500	1,145 contacts →
	Strong evidence “CapSpecialty® is a leading provider of specialty insurance for small to mid-sized businesses in the U.S, offering casualty, professional liability, surety and fidelity products in…” Source: RevenueBase Database · checked Sep 17, 2026
17	Ryan Specialty	Partial evidence	Chicago, IL, United StatesHQ checked Sep 17, 2026	5,001-10,000	1,079 contacts →
	Partial evidence “Ryan Specialty (NYSE: RYAN) is an international specialty insurance firm that provides distribution, underwriting, product development, administration and risk management services…” Source: RevenueBase Database · checked Sep 17, 2026
18	Fcci Insurance Group	Partial evidence	Sarasota, FL, United StatesHQ checked Sep 17, 2026	501-1,000	1,036 contacts →
	Partial evidence “FCCI Insurance Group provides commercial property and casualty insurance.” Source: RevenueBase Database · checked Sep 17, 2026
19	Safety National	Partial evidence	St Louis, MO, United StatesHQ checked Sep 17, 2026	501-1,000	1,008 contacts →
	Partial evidence “Safety National is a leading specialty insurance and reinsurance provider.” Source: RevenueBase Database · checked Sep 17, 2026
20	Argo Group	Strong evidence	New York, NY, United StatesHQ checked Sep 17, 2026	501-1,000	851 contacts →
	Strong evidence “Argo Group is a U.S-focused underwriter of specialty insurance products in the property and casualty market.” Source: RevenueBase Database · checked Sep 17, 2026
21	Amerisure Insurance	Partial evidence	Farmington Hills, MI, United StatesHQ checked Sep 17, 2026	501-1,000	816 contacts →
	Partial evidence “Amerisure Insurance Company’s continuous strength and success are the result of an unwavering commitment to service.” Source: RevenueBase Database · checked Sep 17, 2026
22	Msig USA	Partial evidence	New York, NY, United StatesHQ checked Sep 17, 2026	201-500	693 contacts →
	Partial evidence “MSIG USA is the partner that businesses rely on for creative, customized insurance solutions.” Source: RevenueBase Database · checked Sep 17, 2026
23	Applied Underwriters	Strong evidence	Omaha, NE, United StatesHQ checked Sep 17, 2026	1,001-5,000	680 contacts →
	Strong evidence “Applied Underwriters® is a global risk services firm helping business and people manage uncertainty through its business services, insurance, and reinsurance solutions.” Source: RevenueBase Database · checked Sep 17, 2026
24	Hudson Insurance Group	Indirect evidence	New York, NY, United StatesHQ checked Sep 17, 2026	201-500	675 contacts →
	Indirect evidence “Headquartered in New York City with offices throughout the U.S.” Source: RevenueBase Database · checked Sep 17, 2026
25	Copperpoint Insurance Companies	Partial evidence	Phoenix, AZ, United StatesHQ checked Sep 17, 2026	501-1,000	647 contacts →
	Partial evidence “Founded in 1925, CopperPoint Insurance Companies, copperpoint.com, is a leading provider of workers’ compensation and commercial property and casualty insurance solutions.” 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: public liability insurance underwriters. 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 public liability insurance underwriters.
Partial evidence: Its own public description names part of public liability insurance underwriters, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name public liability insurance underwriters. 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 1,218 public liability insurance underwriters based in the United States

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Public liability insurance underwriters based in the United States at a glance

As of Sep 17, 2026

44.1%Verified-email coverage

102.5Average contacts per company

11-50Median size (employees)

4.0%Largest-city concentration · New York

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

498

11-50

429

51-200

148

201-500

501-1,000

1,001-5,000

5,001-10,000

10001+

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 1,218 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 public liability insurance underwriters, 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 “public liability insurance underwriters”. 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 public liability insurance underwriters), 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 public liability insurance underwriters, 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, 55,029 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.

Public liability insurance underwriters by metro

Public liability insurance underwriters in New York49
Public liability insurance underwriters in Houston29

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 public liability insurance underwriters, 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 public liability insurance underwriters are there based in the United States?

RevenueBase identified 1,218 public liability insurance underwriters 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?

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

Which city has the most public liability insurance underwriters?

New York leads with 49 headquartered companies, followed by Houston (29) and Chicago (22).

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 55,029 verified decision-maker contacts tracked across these 1,218 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.