Company lists · Data refreshed September 2026

Top 25 Property insurance underwriting companies based in the United States

RevenueBase identified 370 company matches for property insurance underwriting companies associated with the United States as of September 2026 and tracks 72,635 professional contacts across them, including 29,301 with verified work emails. New York is the largest hub.

This list covers company matches for property insurance underwriting 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 September 16, 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 Sep 16, 2026 How this list was built
370Companies
72,635Contacts tracked
29,301Verified emails
Explore this list → Free signup · no credit card · 500 free credits

The 25 largest property insurance underwriting companies based in the United States

Ranked by team size
Top 25 of 370 company matches for property insurance underwriting companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 16, 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 matchNew York, NY, United StatesHQ recorded Sep 16, 202610001+32,682 contacts →

Exact match

“Travelers provides insurance coverage to protect the things that are important to you – your home, your car, your valuables and your business.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
2Exact matchJohnston, RI, United StatesHQ recorded Sep 16, 20265,001-10,0006,351 contacts →

Exact match

“For nearly 200 years, FM has empowered businesses worldwide to manage risk, prevent loss, and build resilience.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
3Exact matchBrea, CA, United StatesHQ recorded Sep 16, 20265,001-10,0003,186 contacts →

Exact match

“At Mercury, we have been guided by our purpose to help people reduce risk and overcome unexpected events for more than 60 years.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
4Exact matchWayne, PA, United StatesHQ recorded Sep 16, 20261,001-5,0001,314 contacts →

Exact match

“We aspire to be the very best insurance company at underwriting insurance products for our customers.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
5Exact matchWayne, PA, United StatesHQ recorded Sep 16, 20261,001-5,0001,262 contacts →

Exact match

“Radian Group Inc.(NYSE: RDN) is a trusted, global multi-line specialty insurer, built to empower confident business decisions around the world.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
6Exact matchCincinnati, OH, United StatesHQ recorded Sep 16, 20261,001-5,0001,113 contacts →

Exact match

“American Modern provides insurance solutions for customers who need coverage not readily found in the general market.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
7Exact matchCedar Rapids, IA, United StatesHQ recorded Sep 16, 2026501-1,0001,008 contacts →

Exact match

“Founded in 1946 as United Fire & Casualty Company, UFG Insurance (Nasdaq: UFCS) is engaged in the business of writing property and casualty insurance through its insurance company…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
8Exact matchJersey City, NJ, United StatesHQ recorded Sep 16, 20261,001-5,000877 contacts →

Exact match

“SageSure is building the world’s leading catastrophe-risk franchise.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
9Exact matchNew York, NY, United StatesHQ recorded Sep 16, 2026501-1,000851 contacts →

Exact match

“Argo Group is a U.S-focused underwriter of specialty insurance products in the property and casualty market.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
10Exact matchWilkes-barre, PA, United StatesHQ recorded Sep 16, 20261,001-5,000843 contacts →

Exact match

“Rated A+ Superior by AM Best (as of 8/13/25), Berkshire Hathaway GUARD Insurance Companies provides Property & Casualty insurance including Excess & Surplus lines.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
11Exact matchEdina, MN, United StatesHQ recorded Sep 16, 2026501-1,000825 contacts →

Exact match

“Celebrating 125 years of service, Western National Insurance is a super-regional group of property-and-casualty insurance companies providing personal and commercial coverage in…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
12Exact matchColumbus, OH, United StatesHQ recorded Sep 16, 20261,001-5,000824 contacts →

Exact match

“Encova Insurance provides commercial, auto and home insurance.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
13Exact matchNew York, NY, United StatesHQ recorded Sep 16, 2026201-500675 contacts →

Exact match

“Headquartered in New York City with offices throughout the U.S.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
14Exact matchCincinnati, OH, United StatesHQ recorded Sep 16, 20261,001-5,000635 contacts →

Exact match

“Core Specialty, through its subsidiary insurers, offers a diversified range of property, casualty, and marine insurance products for small to mid-sized businesses.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
15Exact matchFort Lauderdale, FL, United StatesHQ recorded Sep 16, 20261,001-5,000617 contacts →

Exact match

“Universal Property & Casualty Insurance Company (UPCIC), a wholly owned subsidiary of Universal Insurance Holdings, Inc, is one of the leading writers of homeowners insurance in…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
16Exact matchHouston, TX, United StatesHQ recorded Sep 16, 2026501-1,000561 contacts →

Exact match

“Skyward Specialty is a rapidly growing and innovative specialty insurance company, delivering commercial P&C products and solutions on a non-admitted and admitted basis.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
17Exact matchGainesville, FL, United StatesHQ recorded Sep 16, 2026501-1,000559 contacts →

Exact match

“Founded in 1972, Tower Hill Insurance is a leader among residential and commercial property insurers.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
18Exact matchJacksonville, FL, United StatesHQ recorded Sep 16, 2026501-1,000553 contacts →

Exact match

“For more than 45 years, Fortegra and its subsidiaries have delivered risk management solutions that help people and businesses succeed in the face of uncertainty.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
19Exact matchLake Mary, FL, United StatesHQ recorded Sep 16, 2026501-1,000489 contacts →

Exact match

“At Frontline Insurance, we’re more than an insurance company.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
20Exact matchAtlanta, GA, United StatesHQ recorded Sep 16, 2026201-500442 contacts →

Exact match

“RSUI is a leading underwriter of wholesale specialty insurance.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
21Exact matchSt. Petersburg, FL, United StatesHQ recorded Sep 16, 2026501-1,000405 contacts →

Exact match

“ASI is the 15th largest homeowners insurance carrier in the United States.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
22Exact matchNew York, NY, United StatesHQ recorded Sep 16, 2026201-500377 contacts →

Exact match

“Seneca Insurance Company is a Specialty Property and Casualty Insurance company with thirteen offices across the U.S.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
23Exact matchLa Jolla, CA, United StatesHQ recorded Sep 16, 2026501-1,000363 contacts →

Exact match

“Founded in 2014, by a team with deep experience across underwriting, analytics, reinsurance and capital markets, Palomar is an innovative specialty insurer serving residential and…”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
24Exact matchAlpharetta, GA, United StatesHQ recorded Sep 16, 2026501-1,000363 contacts →

Exact match

“About Us Westchester is one of the largest and most diverse excess and surplus lines commercial property and casualty insurance companies in the United States.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase
25Exact matchJersey City, NJ, United StatesHQ recorded Sep 16, 2026201-500348 contacts →

Exact match

“Tokio Marine has been conducting business in the U.S.”

Recorded in the RevenueBase company graph · Sep 16, 2026 · View company records in RevenueBase

Showing 25 of 370 property insurance underwriting companies based in the United States

See the full list, filter by size, metro and specialty, and access 29,301 tracked professional contacts with verified work emails. Direct dials are available where recorded.

Free signup · no credit card

View the full list →

Property insurance underwriting companies based in the United States at a glance

As of Sep 16, 2026
40.3%Verified-email coverage
196.3Average contacts per company
11-50Median size (employees)
3.5%Largest-city concentration · New York
Sep 16, 2026Page data refreshed

Companies by employee count

1-10
150
11-50
106
51-200
50
201-500
23
501-1,000
18
1,001-5,000
14
5,001-10,000
4
10001+
5

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 370 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 “property insurance underwriting 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 29,301 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 September 16, 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 “property insurance underwriting companies”; each Exact match badge shows search membership, not an individual similarity or quality score.

How many property insurance underwriting companies are there based in the United States?

RevenueBase identified 370 company matches for property insurance underwriting companies associated with the United States as of September 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?

Travelers tops the displayed preview by professional contacts tracked in RevenueBase. Recorded headquarters appear in the company rows.

Which city has the most property insurance underwriting companies?

New York leads with 13 company records, followed by Dallas (10) and Chicago (8).

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 29,301 professional contacts with verified work emails tracked across these 370 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 September 16, 2026.

Ready to reach these companies? Verified emails and direct dials for all 370 property insurance underwriting companies based in the United States. Start with a free account, no credit card.

Download this list →

Related lists

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.