Company lists · Data refreshed September 2026

Top 25 Property and casualty insurance platforms based in the United States

RevenueBase identified 1,346 property and casualty insurance platforms headquartered in the United States as of September 2026 and tracks 157,052 professional contacts across them, including 67,141 with verified work emails. New York is the largest hub.

This list covers property and casualty insurance platforms 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 29, 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 29, 2026 86% judged on-target in blind review
1,346Companies
157,052Contacts tracked
67,141Verified emails
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The 25 largest property and casualty insurance platforms based in the United States

Ranked by team size
Top 25 of 1,346 property and casualty insurance platforms based in the United States, ranked by team size, largest first. Data refreshed Sep 29, 2026. RevenueBase Smart Search rates how each company's information relates to property and casualty insurance platforms: 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceBoston, MA, United StatesHQ checked Sep 29, 202610001+30,330 contacts →

Indirect evidence

“At Liberty Mutual, we believe progress happens when people feel secure.”

Source: RevenueBase Database · checked Sep 29, 2026
2Indirect evidenceChicago, IL, United StatesHQ checked Sep 29, 20265,001-10,0006,984 contacts →

Indirect evidence

“CNA is one of the largest U.S.”

Source: RevenueBase Database · checked Sep 29, 2026
3Partial evidenceWorcester, MA, United StatesHQ checked Sep 29, 20265,001-10,0005,132 contacts →

Partial evidence

“Rooted in our commitment to be with you, every step, The Hanover Insurance Group, Inc.”

Source: RevenueBase Database · checked Sep 29, 2026
4Indirect evidenceCincinnati, OH, United StatesHQ checked Sep 29, 20265,001-10,0005,039 contacts →

Indirect evidence

“For more than 150 years, customers have trusted us to protect what matters most to them.”

Source: RevenueBase Database · checked Sep 29, 2026
5Strong evidenceNew York, NY, United StatesHQ checked Sep 29, 20265,001-10,0004,734 contacts →

Strong evidence

“AmTrust Financial Services, Inc, through its subsidiaries, operates as a multinational property and casualty insurance company.”

Source: RevenueBase Database · checked Sep 29, 2026
6Strong evidenceFairfield, OH, United StatesHQ checked Sep 29, 20261,001-5,0004,539 contacts →

Strong evidence

“The Cincinnati Insurance Company, operating since 1950, stands among the nation's top 25 property casualty insurer groups based on net written premiums.”

Source: RevenueBase Database · checked Sep 29, 2026
7Strong evidenceColumbia, MO, United StatesHQ checked Sep 29, 20261,001-5,0003,912 contacts →

Strong evidence

“Shelter Insurance® is a property casualty insurance company offering auto and home insurance in addition to several other insurance products, including: Life Insurance Renters…”

Source: RevenueBase Database · checked Sep 29, 2026
8Partial evidenceSan Mateo, CA, United StatesHQ checked Sep 29, 20261,001-5,0003,765 contacts →

Partial evidence

“Guidewire is the platform P&C insurers trust to engage, innovate, and grow efficiently.”

Source: RevenueBase Database · checked Sep 29, 2026
9Indirect evidenceBrea, CA, United StatesHQ checked Sep 29, 20265,001-10,0003,186 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 29, 2026
10Partial evidenceChicago, IL, United StatesHQ checked Sep 29, 20261,001-5,0002,955 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 29, 2026
11Partial evidenceDenver, CO, United StatesHQ checked Sep 29, 20261,001-5,0002,840 contacts →

Partial evidence

“We believe insurance is about relationships.”

Source: RevenueBase Database · checked Sep 29, 2026
12Indirect evidenceChicago, IL, United StatesHQ checked Sep 29, 20261,001-5,0002,250 contacts →

Indirect evidence

“Intelligent Solutions Inc.”

Source: RevenueBase Database · checked Sep 29, 2026
13Partial evidenceChicago, IL, United StatesHQ checked Sep 29, 20261,001-5,0002,224 contacts →

Partial evidence

“For more than 40 years, Applied Systems has created innovative technology for the global insurance industry.”

Source: RevenueBase Database · checked Sep 29, 2026
14Strong evidenceMorristown, NJ, United StatesHQ checked Sep 29, 20261,001-5,0002,105 contacts →

Strong evidence

“Crum & Forster (C&F) provides market leading property & casualty, accident & health, specialty and standard commercial lines insurance solutions.”

Source: RevenueBase Database · checked Sep 29, 2026
15Strong evidenceBoston, MA, United StatesHQ checked Sep 29, 20261,001-5,0001,809 contacts →

Strong evidence

“Duck Creek Technologies is the intelligent solutions provider defining the future of the property and casualty (P&C) and general insurance industry.”

Source: RevenueBase Database · checked Sep 29, 2026
16Partial evidenceLongwood, FL, United StatesHQ checked Sep 29, 20261,001-5,0001,431 contacts →

Partial evidence

“Insurance Office of America (IOA) is the fourth largest privately held insurance brokerage in the United States.”

Source: RevenueBase Database · checked Sep 29, 2026
17Strong evidencePeoria, IL, United StatesHQ checked Sep 29, 20261,001-5,0001,386 contacts →

Strong evidence

“RLI is a U.S-based specialty insurer that serves niche property, casualty and surety markets.”

Source: RevenueBase Database · checked Sep 29, 2026
18Strong evidenceSan Diego, CA, United StatesHQ checked Sep 29, 20261,001-5,0001,266 contacts →

Strong evidence

“ICW Group Insurance Companies is a top-tier, national, multi-line Property & Casualty insurance company, providing comprehensive coverage to safeguard our customers’ world.”

Source: RevenueBase Database · checked Sep 29, 2026
19Strong evidenceWhite Plains, NY, United StatesHQ checked Sep 29, 2026501-1,0001,116 contacts →

Strong evidence

“PURE is a specialty property and casualty insurer dedicated to helping a membership of responsible people protect high value homes, jewelry, artwork and other fine assets.”

Source: RevenueBase Database · checked Sep 29, 2026
20Partial evidenceCincinnati, OH, United StatesHQ checked Sep 29, 20261,001-5,0001,113 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 29, 2026
21Indirect evidenceColumbus, OH, United StatesHQ checked Sep 29, 20261,001-5,0001,095 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 29, 2026
22Strong evidenceSarasota, FL, United StatesHQ checked Sep 29, 2026501-1,0001,036 contacts →

Strong evidence

“FCCI Insurance Group provides commercial property and casualty insurance.”

Source: RevenueBase Database · checked Sep 29, 2026
23Strong evidenceCedar Rapids, IA, United StatesHQ checked Sep 29, 2026501-1,0001,008 contacts →

Strong evidence

“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…”

Source: RevenueBase Database · checked Sep 29, 2026
24Partial evidenceHartford, CT, United StatesHQ checked Sep 29, 20261,001-5,000998 contacts →

Partial evidence

“Insurity is a leading provider of cloud-based software for insurance carriers, brokers, and MGAs.”

Source: RevenueBase Database · checked Sep 29, 2026
25Indirect evidenceQuincy, MA, United StatesHQ checked Sep 29, 2026501-1,000969 contacts →

Indirect evidence

“Voted a Boston Business Journal Best Place to Work since 2009!”

Source: RevenueBase Database · checked Sep 29, 2026

Showing 25 of 1,346 property and casualty insurance platforms based in the United States

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Property and casualty insurance platforms based in the United States at a glance

As of Sep 29, 2026
42.8%Verified-email coverage
116.7Average contacts per company
11-50Median size (employees)
4.6%Largest-city concentration · New York
Sep 29, 2026Page data refreshed

Companies by employee count

1-10
558
11-50
423
51-200
172
201-500
88
501-1,000
44
1,001-5,000
44
5,001-10,000
10
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 1,346 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 property and casualty insurance platforms, 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 “property and casualty insurance platforms”. 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 property and casualty insurance platforms), 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 property and casualty insurance platforms, 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, 67,141 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 29, 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 property and casualty insurance platforms, 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 property and casualty insurance platforms are there based in the United States?

RevenueBase identified 1,346 property and casualty insurance platforms 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?

Liberty Mutual Insurance, headquartered in Boston, tops this list with the largest team on record.

Which city has the most property and casualty insurance platforms?

New York leads with 62 headquartered companies, followed by San Francisco (25) and Dallas (23).

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 67,141 verified decision-maker contacts tracked across these 1,346 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 29, 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.