Company lists · Data refreshed September 2026

Top 25 Commercial insurance companies based in the United States

Name: Commercial 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 16, 2026 4,112 companies tracked

RevenueBase identified 4,112 commercial insurance companies headquartered in the United States as of September 2026 and tracks 259,338 professional contacts across them, including 87,180 with verified work emails. Houston is the largest hub.

This list covers commercial insurance companies 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 16, 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 16, 2026 86% judged on-target in blind review

4,112Companies

259,338Contacts tracked

87,180Verified emails

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The 25 largest commercial insurance companies based in the United States

Ranked by team size

Top 25 of 4,112 commercial insurance companies based in the United States, ranked by team size, largest first. Data refreshed Sep 16, 2026. RevenueBase Smart Search rates how each company's information relates to commercial insurance companies: 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	Farmers Insurance	Partial evidence	Woodland Hills, CA, United StatesHQ checked Sep 16, 2026	10001+	39,066 contacts →
	Partial evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
2	Travelers	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 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 16, 2026
3	Liberty Mutual Insurance	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	10001+	30,330 contacts →
	Indirect evidence “At Liberty Mutual, we believe progress happens when people feel secure.” Source: RevenueBase Database · checked Sep 16, 2026
4	Zurich North America	Partial evidence	Schaumburg, IL, United StatesHQ checked Sep 16, 2026	5,001-10,000	8,988 contacts →
	Partial evidence “Zurich North America is one of the largest providers of insurance solutions and services to businesses and individuals.” Source: RevenueBase Database · checked Sep 16, 2026
5	CNA Insurance	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 16, 2026	5,001-10,000	6,984 contacts →
	Indirect evidence “CNA is one of the largest U.S.” Source: RevenueBase Database · checked Sep 16, 2026
6	FM	Indirect evidence	Johnston, RI, United StatesHQ checked Sep 16, 2026	5,001-10,000	6,351 contacts →
	Indirect evidence “For nearly 200 years, FM has empowered businesses worldwide to manage risk, prevent loss, and build resilience.” Source: RevenueBase Database · checked Sep 16, 2026
7	Kemper	Indirect evidence	Chicago, IL, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,419 contacts →
	Indirect evidence “The Kemper family of companies is one of the nation’s leading specialized insurers.” Source: RevenueBase Database · checked Sep 16, 2026
8	Auto-Owners Insurance	Indirect evidence	Lansing, MI, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,282 contacts →
	Indirect evidence “We are a team of hard working associates and local, independent agents who are proud to be among the nation's largest insurers of Life, Home, Car, and Business; and consistently…” Source: RevenueBase Database · checked Sep 16, 2026
9	The Hanover Insurance Group	Partial evidence	Worcester, MA, United StatesHQ checked Sep 16, 2026	5,001-10,000	5,132 contacts →
	Partial evidence “Rooted in our commitment to be with you, every step, The Hanover Insurance Group, Inc.” Source: RevenueBase Database · checked Sep 16, 2026
10	Amtrust Financial Services, INC	Partial evidence	New York, NY, United StatesHQ checked Sep 16, 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 16, 2026
11	The Cincinnati Insurance Companies	Partial evidence	Fairfield, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	4,539 contacts →
	Partial 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 16, 2026
12	Sentry	Partial evidence	Stevens Point, WI, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,963 contacts →
	Partial evidence “Sentry Insurance got its start in 1904, when members of the Wisconsin Retail Hardware Association formed their own insurance company.” Source: RevenueBase Database · checked Sep 16, 2026
13	Mercury Insurance	Indirect evidence	Brea, CA, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,186 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 16, 2026
14	Mcgriff	Indirect evidence	Charlotte, NC, United StatesHQ checked Sep 16, 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 16, 2026
15	Selective Insurance	Partial evidence	Branchville, NJ, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,931 contacts →
	Partial evidence “At Selective, we maintain a commitment to provide unique insurance solutions that help keep the families and businesses of our communities protected.” Source: RevenueBase Database · checked Sep 16, 2026
16	Crum & Forster	Strong evidence	Morristown, NJ, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,105 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 16, 2026
17	QBE North America	Indirect evidence	New York, NY, United StatesHQ checked Sep 16, 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 16, 2026
18	Berkshire Hathaway Specialty Insurance	Partial evidence	Boston, MA, United StatesHQ checked Sep 16, 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 16, 2026
19	Grange Insurance	Partial evidence	Columbus, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,506 contacts →
	Partial evidence “For generations, Grange Insurance and the independent agents who represent our company have empowered people to live their best lives.” Source: RevenueBase Database · checked Sep 16, 2026
20	West Bend Insurance Company	Partial evidence	West Bend, WI, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,442 contacts →
	Partial evidence “For more than 130 years, West Bend has been a trusted provider of insurance products, serving the diverse needs of business, home, and automobile owners.” Source: RevenueBase Database · checked Sep 16, 2026
21	Utica National Insurance Group	Strong evidence	New Hartford, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,338 contacts →
	Strong evidence “Utica National Insurance Group is a Top 100, nationally recognized insurer providing personal and commercial insurance products and services, with the second-largest errors and…” Source: RevenueBase Database · checked Sep 16, 2026
22	Homesite Insurance	Indirect evidence	Boston, MA, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,269 contacts →
	Indirect evidence “Homesite.” Source: RevenueBase Database · checked Sep 16, 2026
23	Capspecialty	Partial evidence	Middleton, WI, United StatesHQ checked Sep 16, 2026	201-500	1,145 contacts →
	Partial 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 16, 2026
24	Fcci Insurance Group	Strong evidence	Sarasota, FL, United StatesHQ checked Sep 16, 2026	501-1,000	1,036 contacts →
	Strong evidence “FCCI Insurance Group provides commercial property and casualty insurance.” Source: RevenueBase Database · checked Sep 16, 2026
25	UFG Insurance	Partial evidence	Cedar Rapids, IA, United StatesHQ checked Sep 16, 2026	501-1,000	1,008 contacts →
	Partial 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 16, 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: commercial insurance companies. 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 commercial insurance companies.
Partial evidence: Its own public description names part of commercial insurance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name commercial insurance companies. 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 4,112 commercial insurance companies based in the United States

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Commercial insurance companies based in the United States at a glance

As of Sep 16, 2026

33.6%Verified-email coverage

63.1Average contacts per company

1-10Median size (employees)

1.5%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

2,524

11-50

1,170

51-200

219

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 4,112 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 commercial insurance companies, 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 “commercial insurance companies”. 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 commercial insurance companies), 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 commercial insurance companies, 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, 87,180 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 16, 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.

Commercial insurance companies by metro

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 commercial insurance companies, 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 commercial insurance companies are there based in the United States?

RevenueBase identified 4,112 commercial insurance companies 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?

Farmers Insurance, headquartered in Woodland Hills, tops this list with the largest team on record.

Which city has the most commercial insurance companies?

Houston leads with 61 headquartered companies, followed by New York (60) and Miami (42).

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 87,180 verified decision-maker contacts tracked across these 4,112 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 16, 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.