Company lists · Data refreshed September 2026

Top 25 Group health insurance companies worldwide

RevenueBase identified 1,285 group health insurance companies worldwide as of September 2026 and tracks 86,376 professional contacts across them, including 27,060 with verified work emails and 0 with mobile numbers. The United States is the largest market and Sao Paulo the largest hub.

This list covers group health insurance companies worldwide, 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 15, 2026. Country and city lists for group health insurance companies follow the table.

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 15, 2026 86% judged on-target in blind review
1,285Companies
86,376Contacts tracked
27,060Verified emails
0Mobile numbers
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The 25 largest group health insurance companies worldwide

Ranked by team size
Top 25 of 1,285 group health insurance companies worldwide, ranked by team size, largest first. Data refreshed Sep 15, 2026. RevenueBase Smart Search rates how each company's information relates to group health 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.
#CompanyRevenueBase Smart SearchHeadquartersEmployeesContacts
1Indirect evidenceIndianapolis, IN, United StatesHQ checked Sep 15, 2026n/a18,559 contacts →

Indirect evidence

Source: RevenueBase Database · checked Sep 15, 2026
2Partial evidenceMinnetonka, MN, United StatesHQ checked Sep 15, 202610001+13,144 contacts →

Partial evidence

“When it comes to your health, everything matters.”

Source: RevenueBase Database · checked Sep 15, 2026
3Partial evidenceNewark, NJ, United StatesHQ checked Sep 15, 20265,001-10,0004,986 contacts →

Partial evidence

“Horizon Blue Cross Blue Shield of New Jersey- the state’s largest and oldest health insurer - is a subsidiary of Horizon Mutual Holdings, Inc, a not-for-profit mutual holding…”

Source: RevenueBase Database · checked Sep 15, 2026
4Indirect evidencePittsburgh, PA, United StatesHQ checked Sep 15, 20261,001-5,0004,363 contacts →

Indirect evidence

“How can we best serve our members and the community?”

Source: RevenueBase Database · checked Sep 15, 2026
5Partial evidencePittsburgh, PA, United StatesHQ checked Sep 15, 202610001+3,413 contacts →

Partial evidence

“A national blended health organization, Highmark Health and our leading businesses support millions of customers with products, services and solutions closely aligned to our…”

Source: RevenueBase Database · checked Sep 15, 2026
6Strong evidenceCleveland, OH, United StatesHQ checked Sep 15, 20261,001-5,0002,667 contacts →

Strong 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 15, 2026
7Partial evidenceBuffalo, NY, United StatesHQ checked Sep 15, 20261,001-5,0001,847 contacts →

Partial evidence

“As one of Western New York's first HMOs, Independent Health covers approximately people here and across the country with more than 100 plans, services and products.”

Source: RevenueBase Database · checked Sep 15, 2026
8Indirect evidenceHarrisburg, PA, United StatesHQ checked Sep 15, 20261,001-5,0001,770 contacts →

Indirect evidence

“At Capital Blue Cross, we promise to go the extra mile for our team and our community.”

Source: RevenueBase Database · checked Sep 15, 2026
9Indirect evidenceRio De Janeiro, BrazilHQ checked Sep 15, 20265,001-10,0001,574 contacts →

Indirect evidence

“Somos a Assim Saúde, uma operadora fundada em 1988 no Rio de Janeiro, que hoje cuida de mais de clientes entre planos de saúde e odontológicos.”

Source: RevenueBase Database · checked Sep 15, 2026
10Partial evidencePortland, OR, United StatesHQ checked Sep 15, 20265,001-10,0001,463 contacts →

Partial evidence

“Regence is part of a family of regional health plans that have been a symbol of strength and stability in local communities for more than 100 years.”

Source: RevenueBase Database · checked Sep 15, 2026
11Indirect evidenceBarueri, BrazilHQ checked Sep 15, 20261,001-5,0001,349 contacts →

Indirect evidence

“Há mais de 30 anos, olhamos para o futuro e, por isso, somos uma das maiores operadoras de saúde premium do mundo.”

Source: RevenueBase Database · checked Sep 15, 2026
12Partial evidenceHonolulu, HI, United StatesHQ checked Sep 15, 20261,001-5,0001,311 contacts →

Partial 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 15, 2026
13Indirect evidenceLeeꞌs Summit, MO, United StatesHQ checked Sep 15, 2026501-1,0001,151 contacts →

Indirect evidence

“G.E.H.A is one of the largest benefits providers offering medical and dental plans for federal employees, retirees and their dependents.”

Source: RevenueBase Database · checked Sep 15, 2026
14Strong evidenceAustin, TX, United StatesHQ checked Sep 15, 2026501-1,0001,094 contacts →

Strong evidence

“Curative is a leading healthcare services company that created and launched the first-of-its-kind employer-based health insurance plan.”

Source: RevenueBase Database · checked Sep 15, 2026
15Partial evidenceLatham, NY, United StatesHQ checked Sep 15, 20261,001-5,0001,090 contacts →

Partial evidence

“Founded in 1984 as a physician-founded and guided health plan, CDPHP and its affiliates currently serve members in 29 counties throughout New York with a full family of products.”

Source: RevenueBase Database · checked Sep 15, 2026
16Strong evidenceTorrance, CA, United StatesHQ checked Sep 15, 2026501-1,000744 contacts →

Strong evidence

“Keenan provides innovative insurance and financial solutions for schools, public agencies and health care organizations.”

Source: RevenueBase Database · checked Sep 15, 2026
17Indirect evidenceFrederick, MD, United StatesHQ checked Sep 15, 2026n/a652 contacts →

Indirect evidence

“ESIC Corporation is a company based out of 38 S Market St, Frederick, MD, United States.”

Source: RevenueBase Database · checked Sep 15, 2026
18Partial evidenceFort Worth, TX, United StatesHQ checked Sep 15, 2026201-500626 contacts →

Partial evidence

“A family of companies providing a better level of innovative health coverage for people just like you.”

Source: RevenueBase Database · checked Sep 15, 2026
19Strong evidenceJacksonville, FL, United StatesHQ checked Sep 15, 20261,001-5,000620 contacts →

Strong evidence

“Allstate Benefits offers a broad portfolio of Group Supplemental workplace benefits and the services to support them, as well as Group Health Self-Funded Program options for…”

Source: RevenueBase Database · checked Sep 15, 2026
20Partial evidenceVirginia Beach, VA, United StatesHQ checked Sep 15, 2026n/a617 contacts →

Partial evidence

“Optima Health is now Sentara Health Plans.”

Source: RevenueBase Database · checked Sep 15, 2026
21Indirect evidencePorto Alegre, BrazilHQ checked Sep 15, 20261,001-5,000509 contacts →

Indirect evidence

“Oferecer os melhores serviços na área da medicina de grupo.”

Source: RevenueBase Database · checked Sep 15, 2026
22Partial evidenceMinneapolis, MN, United StatesHQ checked Sep 15, 2026201-500425 contacts →

Partial evidence

“Gravie is one of the fastest growing health benefits companies, offering health plans that cover 100% of costs on the most common healthcare services.”

Source: RevenueBase Database · checked Sep 15, 2026
23Partial evidenceFarmington, CT, United StatesHQ checked Sep 15, 2026501-1,000402 contacts →

Partial evidence

“ConnectiCare is a leading health plan in the state of Connecticut.”

Source: RevenueBase Database · checked Sep 15, 2026
24Partial evidenceBirmingham, AL, United StatesHQ checked Sep 15, 2026501-1,000399 contacts →

Partial evidence

“Founded in 1995, VIVA HEALTH is now the preferred healthcare provider for close to 300 Alabama companies and more than members and growing.”

Source: RevenueBase Database · checked Sep 15, 2026
25Partial evidenceWhite Plains, NY, United StatesHQ checked Sep 15, 2026201-500378 contacts →

Partial evidence

“Founded in 1943, Amalgamated Life Insurance Company, headquartered in White Plains, NY, has since grown into leading provider of comprehensive insurance solutions operating in all…”

Source: RevenueBase Database · checked Sep 15, 2026

Showing 25 of 1,285 group health insurance companies worldwide

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Group health insurance companies worldwide at a glance

As of Sep 15, 2026
31.3%Verified-email coverage
67.2Average contacts per company
1-10Median size (employees)
5.4%Largest-city concentration · Sao Paulo
Sep 15, 2026Page data refreshed

Companies by employee count

1-10
732
11-50
318
51-200
130
201-500
38
501-1,000
24
1,001-5,000
22
5,001-10,000
8
10001+
6

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 health 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.
Coverage
3 countries, largest first: the United States, Brazil, Canada. Country and city lists for group health insurance companies are linked below.
What qualifies
Companies worldwide whose own description of what they do matches “group health 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 health 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 health insurance companies, and records with no verified work email.
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, 27,060 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 15, 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 health insurance companies by location

3 lists · largest first

Every Group health insurance companies list RevenueBase publishes, by country and city. Counts are matching companies in each list as of its own refresh date.

Countries

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 health 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 health insurance companies are there worldwide?

RevenueBase identified 1,285 group health insurance companies worldwide 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?

Anthem, INC, headquartered in Indianapolis, tops this list with the largest team on record.

Which country has the most group health insurance companies?

The United States leads with 896 companies, followed by Brazil (363) and Canada (26). Every group health insurance companies list by country and city is linked on this page.

Which city has the most group health insurance companies?

Sao Paulo leads with 70 headquartered companies, followed by Rio De Janeiro (29) and Belo Horizonte (18).

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 27,060 verified decision-maker contacts tracked across these 1,285 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 15, 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.