Company lists · Data refreshed September 2026

Top 25 Admitted insurance carriers based in the United States

RevenueBase identified 21,033 admitted insurance carriers headquartered in the United States as of September 2026 and tracks 696,281 professional contacts across them, including 243,921 with verified work emails. Houston is the largest hub.

This list covers admitted insurance carriers 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 30, 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 30, 2026 86% judged on-target in blind review
21,033Companies
696,281Contacts tracked
243,921Verified emails
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The 25 largest admitted insurance carriers based in the United States

Ranked by team size
Top 25 of 21,033 admitted insurance carriers based in the United States, ranked by team size, largest first. Data refreshed Sep 30, 2026. RevenueBase Smart Search rates how each company's information relates to admitted insurance carriers: 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 evidenceMayfield Village, OH, United StatesHQ checked Sep 30, 202610001+39,169 contacts →

Indirect evidence

“Every journey has a beginning, and wherever you are on your career path, we want to help you along the way.”

Source: RevenueBase Database · checked Sep 30, 2026
2Partial evidenceWoodland Hills, CA, United StatesHQ checked Sep 30, 202610001+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 30, 2026
3Partial evidenceNew York, NY, United StatesHQ checked Sep 30, 202610001+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 30, 2026
4Indirect evidenceBoston, MA, United StatesHQ checked Sep 30, 202610001+30,330 contacts →

Indirect evidence

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

Source: RevenueBase Database · checked Sep 30, 2026
5Indirect evidenceBethesda, MD, United StatesHQ checked Sep 30, 202610001+28,539 contacts →

Indirect evidence

“At GEICO, we offer a rewarding career where your ambitions are met with endless possibilities.”

Source: RevenueBase Database · checked Sep 30, 2026
6Partial evidenceScottsdale, AZ, United StatesHQ checked Sep 30, 202610001+28,332 contacts →

Partial evidence

“Nationwide, a Fortune 100 company based in Columbus, Ohio, is one of the largest and strongest diversified insurance and financial services organizations in the United States.”

Source: RevenueBase Database · checked Sep 30, 2026
7Partial evidenceNew York, NY, United StatesHQ checked Sep 30, 202610001+23,438 contacts →

Partial evidence

“American International Group, Inc.(NYSE: AIG) is a leading global insurance organization.”

Source: RevenueBase Database · checked Sep 30, 2026
8Partial evidenceMadison, WI, United StatesHQ checked Sep 30, 202610001+17,111 contacts →

Partial evidence

“For more than 90 years, American Family Insurance has built its reputation on sound principles.”

Source: RevenueBase Database · checked Sep 30, 2026
9Indirect evidenceDallas, TX, United StatesHQ checked Sep 30, 202610001+13,482 contacts →

Indirect evidence

“What makes Lockton stand apart is also what makes us better: independence.”

Source: RevenueBase Database · checked Sep 30, 2026
10Indirect evidenceBloomington, IL, United StatesHQ checked Sep 30, 20265,001-10,00010,979 contacts →

Indirect evidence

“At State Farm®, our mission is to help people manage the risks of everyday life, recover from the unexpected, and realize their dreams.”

Source: RevenueBase Database · checked Sep 30, 2026
11Partial evidenceWhite Plains, NY, United StatesHQ checked Sep 30, 202610001+9,086 contacts →

Partial evidence

“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…”

Source: RevenueBase Database · checked Sep 30, 2026
12Partial evidenceSchaumburg, IL, United StatesHQ checked Sep 30, 20265,001-10,0008,988 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 30, 2026
13Partial evidenceOmaha, NE, United StatesHQ checked Sep 30, 20261,001-5,0008,621 contacts →

Partial evidence

“Founded in 1909, Mutual of Omaha is a highly-rated, Fortune 300 organization offering a variety of insurance and financial products for individuals, businesses and groups…”

Source: RevenueBase Database · checked Sep 30, 2026
14Partial evidenceBloomington, IL, United StatesHQ checked Sep 30, 20265,001-10,0007,402 contacts →

Partial evidence

“COUNTRY Financial® provides insurance and financial services for over a million households and businesses across 19 states.”

Source: RevenueBase Database · checked Sep 30, 2026
15Indirect evidenceChicago, IL, United StatesHQ checked Sep 30, 20265,001-10,0006,984 contacts →

Indirect evidence

“CNA is one of the largest U.S.”

Source: RevenueBase Database · checked Sep 30, 2026
16Partial evidenceErie, PA, United StatesHQ checked Sep 30, 20265,001-10,0006,321 contacts →

Partial evidence

“From our modest roots starting in 1925 as a Pennsylvania auto insurer, we've grown to become a multi-line insurance company, offering auto, home, business and life insurance…”

Source: RevenueBase Database · checked Sep 30, 2026
17Indirect evidenceChicago, IL, United StatesHQ checked Sep 30, 20265,001-10,0005,419 contacts →

Indirect evidence

“The Kemper family of companies is one of the nation’s leading specialized insurers.”

Source: RevenueBase Database · checked Sep 30, 2026
18Indirect evidenceLansing, MI, United StatesHQ checked Sep 30, 20265,001-10,0005,282 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 30, 2026
19Partial evidenceWorcester, MA, United StatesHQ checked Sep 30, 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 30, 2026
20Indirect evidenceCincinnati, OH, United StatesHQ checked Sep 30, 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 30, 2026
21Indirect evidenceWest Des Moines, IA, United StatesHQ checked Sep 30, 20261,001-5,0004,965 contacts →

Indirect evidence

“It’s your future.”

Source: RevenueBase Database · checked Sep 30, 2026
22Partial evidenceCharlotte, NC, United StatesHQ checked Sep 30, 20265,001-10,0004,926 contacts →

Partial evidence

“Amwins is the largest wholesale distributor of specialty insurance products and services in the U.S.”

Source: RevenueBase Database · checked Sep 30, 2026
23Partial evidenceNew York, NY, United StatesHQ checked Sep 30, 20265,001-10,0004,734 contacts →

Partial evidence

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

Source: RevenueBase Database · checked Sep 30, 2026
24Partial evidenceFairfield, OH, United StatesHQ checked Sep 30, 20261,001-5,0004,539 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 30, 2026
25Partial evidenceHouston, TX, United StatesHQ checked Sep 30, 20261,001-5,0004,263 contacts →

Partial evidence

“American National Insurance Company, founded in Galveston, Texas, in 1905 and now headquartered in Houston, has successfully managed a broad portfolio of insurance and financial…”

Source: RevenueBase Database · checked Sep 30, 2026

Showing 25 of 21,033 admitted insurance carriers based in the United States

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Admitted insurance carriers based in the United States at a glance

As of Sep 30, 2026
35.0%Verified-email coverage
33.1Average contacts per company
1-10Median size (employees)
1.1%Largest-city concentration · Houston
Sep 30, 2026Page data refreshed

Companies by employee count

1-10
13,473
11-50
5,810
51-200
1,058
201-500
263
501-1,000
115
1,001-5,000
140
5,001-10,000
35
10001+
43

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 21,033 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 admitted insurance carriers, 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 “admitted insurance carriers”. 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 admitted insurance carriers), 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 admitted insurance carriers, 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, 243,921 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 30, 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.

Admitted insurance carriers 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 admitted insurance carriers, 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 admitted insurance carriers are there based in the United States?

RevenueBase identified 21,033 admitted insurance carriers 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?

Progressive Insurance, headquartered in Mayfield Village, tops this list with the largest team on record.

Which city has the most admitted insurance carriers?

Houston leads with 241 headquartered companies, followed by Miami (181) and New York (163).

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 243,921 verified decision-maker contacts tracked across these 21,033 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 30, 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.