Company lists · Data refreshed September 2026

Top 25 Group insurance companies based in the United States

Name: Group 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 4,431 companies tracked

RevenueBase identified 4,431 group insurance companies headquartered in the United States as of September 2026 and tracks 272,820 professional contacts across them, including 87,477 with verified work emails. Houston is the largest hub.

This list covers group 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

4,431Companies

272,820Contacts tracked

87,477Verified emails

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The 25 largest group insurance companies based in the United States

Ranked by team size

Top 25 of 4,431 group 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 group 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	Progressive Insurance	Indirect evidence	Mayfield Village, OH, United StatesHQ checked Sep 16, 2026	10001+	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 16, 2026
2	AFLAC	Indirect evidence	Columbus, GA, United StatesHQ checked Sep 16, 2026	10001+	33,480 contacts →
	Indirect evidence “Over 50 Million people worldwide have chosen Aflac because of our commitment to providing customers with the confidence that comes from knowing they have assistance in being…” Source: RevenueBase Database · checked Sep 16, 2026
3	Anthem, INC	Indirect evidence	Indianapolis, IN, United StatesHQ checked Sep 16, 2026	n/a	18,559 contacts →
	Indirect evidence Source: RevenueBase Database · checked Sep 16, 2026
4	American Family Insurance	Partial evidence	Madison, WI, United StatesHQ checked Sep 16, 2026	10001+	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 16, 2026
5	Unitedhealthcare	Indirect evidence	Minnetonka, MN, United StatesHQ checked Sep 16, 2026	10001+	13,144 contacts →
	Indirect evidence “When it comes to your health, everything matters.” Source: RevenueBase Database · checked Sep 16, 2026
6	UNUM	Indirect evidence	Chattanooga, TN, United StatesHQ checked Sep 16, 2026	10001+	10,841 contacts →
	Indirect evidence “Since our founding in 1848, Unum has been a leader in the employee benefits business through innovation, integrity and an unwavering commitment to our customers.” Source: RevenueBase Database · checked Sep 16, 2026
7	Marsh Mclennan Agency	Partial evidence	White Plains, NY, United StatesHQ checked Sep 16, 2026	10001+	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 16, 2026
8	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
9	Mutual Of Omaha	Strong evidence	Omaha, NE, United StatesHQ checked Sep 16, 2026	1,001-5,000	8,621 contacts →
	Strong 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 16, 2026
10	Colonial Life	Strong evidence	Columbia, SC, United StatesHQ checked Sep 16, 2026	1,001-5,000	7,742 contacts →
	Strong evidence “Colonial Life & Accident Insurance Company, a subsidiary of Unum Group, provides financial protection benefits to America’s workers and their families when the unexpected happens.” Source: RevenueBase Database · checked Sep 16, 2026
11	American Income Life Insurance Company	Partial evidence	Waco, TX, United StatesHQ checked Sep 16, 2026	5,001-10,000	7,555 contacts →
	Partial evidence “American Income Life is a major provider of supplemental insurance benefits to working families through relationships established with labor unions, credit unions, and…” Source: RevenueBase Database · checked Sep 16, 2026
12	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
13	The Standard	Strong evidence	Portland, OR, United StatesHQ checked Sep 16, 2026	5,001-10,000	4,348 contacts →
	Strong evidence “The Standard is a leading provider of workplace benefits including group and individual disability insurance, group life and accidental death and dismemberment insurance, group…” Source: RevenueBase Database · checked Sep 16, 2026
14	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
15	Onedigital	Indirect evidence	Atlanta, GA, United StatesHQ checked Sep 16, 2026	5,001-10,000	3,478 contacts →
	Indirect evidence “OneDigital’s team of fierce advocates helps businesses and individuals achieve their aspirations of health, success and financial security.” Source: RevenueBase Database · checked Sep 16, 2026
16	Medical Mutual	Partial evidence	Cleveland, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,667 contacts →
	Partial evidence “Founded in 1934, Medical Mutual is the oldest and one of the largest health insurance companies based in Ohio.” Source: RevenueBase Database · checked Sep 16, 2026
17	CNO Financial Group	Partial evidence	Carmel, IN, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,298 contacts →
	Partial evidence “CNO Financial Group, Inc.(NYSE: CNO) secures the future of middle-income America.” Source: RevenueBase Database · checked Sep 16, 2026
18	American Fidelity	Partial evidence	Oklahoma City, OK, United StatesHQ checked Sep 16, 2026	1,001-5,000	2,039 contacts →
	Partial evidence “American Fidelity is more than an insurance company.” Source: RevenueBase Database · checked Sep 16, 2026
19	Acuity Insurance	Partial evidence	Sheboygan, WI, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,647 contacts →
	Partial evidence “Acuity Insurance is a leading provider of insurance solutions, delivering exceptional coverage and customer service to individuals and businesses in over 30 states.” Source: RevenueBase Database · checked Sep 16, 2026
20	HMSA	Indirect evidence	Honolulu, HI, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,311 contacts →
	Indirect evidence “The Hawaii Medical Service Association (HMSA), an independent licensee of the Blue Cross and Blue Shield Association, is a reliable name in Hawaii health care.” Source: RevenueBase Database · checked Sep 16, 2026
21	Trustmark	Indirect evidence	Lake Forest, IL, United StatesHQ checked Sep 16, 2026	1,001-5,000	1,001 contacts →
	Indirect evidence “Trustmark is a national employee benefits company offering specialized expertise in voluntary benefits, self-funded health benefit plan design and administration, and employee…” Source: RevenueBase Database · checked Sep 16, 2026
22	Western National Insurance	Strong evidence	Edina, MN, United StatesHQ checked Sep 16, 2026	501-1,000	825 contacts →
	Strong evidence “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…” Source: RevenueBase Database · checked Sep 16, 2026
23	Encova Insurance	Partial evidence	Columbus, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	824 contacts →
	Partial evidence “Encova Insurance provides commercial, auto and home insurance.” Source: RevenueBase Database · checked Sep 16, 2026
24	Keenan	Partial evidence	Torrance, CA, United StatesHQ checked Sep 16, 2026	501-1,000	744 contacts →
	Partial evidence “Keenan provides innovative insurance and financial solutions for schools, public agencies and health care organizations.” Source: RevenueBase Database · checked Sep 16, 2026
25	Bristol West Insurance Group	Indirect evidence	Independence, OH, United StatesHQ checked Sep 16, 2026	1,001-5,000	718 contacts →
	Indirect evidence “Bristol West®: The Beginning It all started in Florida in 1973.” 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: group 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 group insurance companies.
Partial evidence: Its own public description names part of group insurance companies, so it works in or next to the category without describing itself that way.
Indirect evidence: The description shown does not name group 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 4,431 group insurance companies based in the United States

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Group insurance companies based in the United States at a glance

As of Sep 16, 2026

32.1%Verified-email coverage

61.6Average contacts per company

1-10Median size (employees)

1.4%Largest-city concentration · Houston

Sep 16, 2026Page data refreshed

Companies by employee count

1-10

2,694

11-50

1,217

51-200

313

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 4,431 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 group 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 “group 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 group 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 group 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, 87,477 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.

Group insurance companies by metro

Group insurance companies in Houston64
Group insurance companies in Dallas43
Group insurance companies in Los Angeles40
Group insurance companies in Miami39
Group insurance companies in Chicago37
Group insurance companies in San Diego37
Group insurance companies in Atlanta35
Group insurance companies in Phoenix34
Group insurance companies in New York32
Group insurance companies in Las Vegas30
Group insurance companies in San Antonio30
Group insurance companies in Tampa29
Group insurance companies in Austin25

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 group 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 group insurance companies are there based in the United States?

RevenueBase identified 4,431 group 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?

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

Which city has the most group insurance companies?

Houston leads with 64 headquartered companies, followed by Dallas (43) and Los Angeles (40).

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 87,477 verified decision-maker contacts tracked across these 4,431 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.