Company lists · Data refreshed September 2026

Top 25 P and i insurance companies based in the United States

Name: P and i insurance companies 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 4,602 companies tracked

RevenueBase identified 4,602 company matches for p and i insurance companies associated with the United States as of September 2026 and tracks 460,752 professional contacts across them, including 189,361 with verified work emails. Rolling Meadows is the largest hub.

This list covers company matches for p and i 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 September 17, 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 17, 2026 How this list was built

4,602Companies

460,752Contacts tracked

189,361Verified emails

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The 25 largest p and i insurance companies based in the United States

Ranked by team size

Top 25 of 4,602 company matches for p and i insurance companies based in the United States, ordered by professional contacts tracked in RevenueBase, largest first. Recorded Sep 17, 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.
#	Company	RevenueBase SmartSearch	Headquarters	Employees	Contacts
1	Farmers Insurance	Exact match	Woodland Hills, CA, United StatesHQ recorded Sep 17, 2026	10001+	39,066 contacts →
	Exact match “The companies comprising the Farmers Insurance Group of Companies® currently make up one of the country's largest insurers of vehicles, homes and small businesses, and provide a…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
2	Travelers	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	10001+	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 17, 2026 · View company records in RevenueBase
3	Liberty Mutual Insurance	Exact match	Boston, MA, United StatesHQ recorded Sep 17, 2026	10001+	30,330 contacts →
	Exact match “At Liberty Mutual, we believe progress happens when people feel secure.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
4	AIG	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	10001+	23,438 contacts →
	Exact match “American International Group, Inc.(NYSE: AIG) is a leading global insurance organization.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
5	MARSH	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	10001+	15,852 contacts →
	Exact match “We help our clients and colleagues grow, and our communities thrive, by protecting and promoting Possibility.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
6	HUB International	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	10001+	14,217 contacts →
	Exact match “Hi, we’re HUB.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
7	Lockton	Exact match	Dallas, TX, United StatesHQ recorded Sep 17, 2026	10001+	13,482 contacts →
	Exact match “What makes Lockton stand apart is also what makes us better: independence.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
8	USI Insurance Services	Exact match	Valhalla, NY, United StatesHQ recorded Sep 17, 2026	10001+	10,303 contacts →
	Exact match “USI is one of the largest insurance brokerage and consulting firms in the world, delivering property and casualty, employee benefits, personal risk, program and retirement…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
9	Marsh Mclennan Agency	Exact match	White Plains, NY, United StatesHQ recorded Sep 17, 2026	10001+	9,086 contacts →
	Exact match “Marsh McLennan Agency, a business of Marsh (NYSE: MRSH), is a leading provider of business insurance, employee health & benefits, retirement & wealth, and private client insurance…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
10	Zurich North America	Exact match	Schaumburg, IL, United StatesHQ recorded Sep 17, 2026	5,001-10,000	8,988 contacts →
	Exact match “Zurich North America is one of the largest providers of insurance solutions and services to businesses and individuals.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
11	CNA Insurance	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	5,001-10,000	6,984 contacts →
	Exact match “CNA is one of the largest U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
12	FM	Exact match	Johnston, RI, United StatesHQ recorded Sep 17, 2026	5,001-10,000	6,351 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 17, 2026 · View company records in RevenueBase
13	Kemper	Exact match	Chicago, IL, United StatesHQ recorded Sep 17, 2026	5,001-10,000	5,419 contacts →
	Exact match “The Kemper family of companies is one of the nation’s leading specialized insurers.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
14	The Hanover Insurance Group	Exact match	Worcester, MA, United StatesHQ recorded Sep 17, 2026	5,001-10,000	5,132 contacts →
	Exact match “Rooted in our commitment to be with you, every step, The Hanover Insurance Group, Inc.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
15	Great American Insurance Group	Exact match	Cincinnati, OH, United StatesHQ recorded Sep 17, 2026	5,001-10,000	5,039 contacts →
	Exact match “For more than 150 years, customers have trusted us to protect what matters most to them.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
16	Amwins	Exact match	Charlotte, NC, United StatesHQ recorded Sep 17, 2026	5,001-10,000	4,926 contacts →
	Exact match “Amwins is the largest wholesale distributor of specialty insurance products and services in the U.S.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
17	Amtrust Financial Services, INC	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	5,001-10,000	4,734 contacts →
	Exact match “AmTrust Financial Services, Inc, through its subsidiaries, operates as a multinational property and casualty insurance company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
18	Assuredpartners	Exact match	Rolling Meadows, IL, United StatesHQ recorded Sep 17, 2026	10001+	4,282 contacts →
	Exact match Recorded description not available. Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
19	Nfp, An AON Company	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	5,001-10,000	4,119 contacts →
	Exact match “NFP, an Aon company, helps companies and individuals address today’s most significant Risk Capital and Human Capital challenges.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
20	Sentry	Exact match	Stevens Point, WI, United StatesHQ recorded Sep 17, 2026	5,001-10,000	3,963 contacts →
	Exact match “Sentry Insurance got its start in 1904, when members of the Wisconsin Retail Hardware Association formed their own insurance company.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
21	Everest	Exact match	Warren, NJ, United StatesHQ recorded Sep 17, 2026	1,001-5,000	3,411 contacts →
	Exact match “Everest Group, Ltd.(“Everest”) is a global underwriting leader providing best-in-class property, casualty, and specialty reinsurance and insurance solutions that address…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
22	Mercury Insurance	Exact match	Brea, CA, United StatesHQ recorded Sep 17, 2026	5,001-10,000	3,186 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 17, 2026 · View company records in RevenueBase
23	Markel	Exact match	Glen Allen, VA, United StatesHQ recorded Sep 17, 2026	1,001-5,000	3,151 contacts →
	Exact match “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…” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
24	STARR	Exact match	New York, NY, United StatesHQ recorded Sep 17, 2026	1,001-5,000	3,060 contacts →
	Exact match “With 100+ years of experience across leading industries, We apply an innovation mindset, agile approach, And a global team with local expertise wherever you operate.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase
25	Mcgriff	Exact match	Charlotte, NC, United StatesHQ recorded Sep 17, 2026	1,001-5,000	3,021 contacts →
	Exact match “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.” Recorded in the RevenueBase company graph · Sep 17, 2026 · View company records in RevenueBase

RevenueBase SmartSearch

Describe a niche business in your own words. RevenueBase SmartSearch compares the meaning of your description with company business descriptions compiled in the RevenueBase company graph. Exact, Similar, Related and Broad control how closely companies must fit.

This list uses Exact for “p and i insurance companies”. Each Exact match badge shows membership in that saved search; it is not an individual similarity score or a service-quality rating. Recorded descriptions are shown where available.

Showing 25 of 4,602 p and i insurance companies based in the United States

See the full list, filter by size, metro and specialty, and access 189,361 tracked professional contacts with verified work emails. Direct dials are available where recorded.

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P and i insurance companies based in the United States at a glance

As of Sep 17, 2026

41.1%Verified-email coverage

100.1Average contacts per company

1-10Median size (employees)

3.6%Largest-city concentration · Rolling Meadows

Sep 17, 2026Page data refreshed

Companies by employee count

1-10

2,333

11-50

1,394

51-200

381

201-500

115

501-1,000

1,001-5,000

5,001-10,000

10001+

214

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 4,602 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 “p and i 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 189,361 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 17, 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.

P and i insurance companies by metro

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

How many p and i insurance companies are there based in the United States?

RevenueBase identified 4,602 company matches for p and i insurance 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?

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

Which city has the most p and i insurance companies?

Rolling Meadows leads with 164 company records, followed by New York (91) and Houston (76).

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 189,361 professional contacts with verified work emails tracked across these 4,602 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 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 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.