In 2024, UnitedHealth Group Inc. was the market leader and had a ** percent share of the U.S. health insurance market. Ellevance Health and CVS (Aetna) followed with a market share of ** percent each.
Who is UnitedHealth Group?
UnitedHealth Group is headquartered in Minnesota and was founded in 1977. The revenue generated by the company has steadily risen since 2007. The company offers health care products as well as insurance coverage.
Membership
In 2024, Kaiser was the largest health insurance company, by membership numbers in the United States, followed by Ellevance and UnitedHealth. Membership of Kaiser reached *** million in that year. Meanwhile, UnitedHealth is among the largest companies worldwide in terms of revenue and the largest health care company on that list.
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American Medical Association. (January 12, 2026). Market share of leading health insurance companies in the United States in 2014 and 2024, by total enrollments [Graph]. In ÌÇÐÄÆƽâ°æ. Retrieved August 01, 2026, from /statistics/216518/leading-us-health-insurance-groups-in-the-us/
American Medical Association. "Market share of leading health insurance companies in the United States in 2014 and 2024, by total enrollments." Chart. January 12, 2026. ÌÇÐÄÆƽâ°æ. Accessed August 01, 2026. /statistics/216518/leading-us-health-insurance-groups-in-the-us/
American Medical Association. (2026). Market share of leading health insurance companies in the United States in 2014 and 2024, by total enrollments. ÌÇÐÄÆƽâ°æ. ÌÇÐÄÆƽâ°æ Inc.. Accessed: August 01, 2026. /statistics/216518/leading-us-health-insurance-groups-in-the-us/
American Medical Association. "Market Share of Leading Health Insurance Companies in The United States in 2014 and 2024, by Total Enrollments." ÌÇÐÄÆƽâ°æ, ÌÇÐÄÆƽâ°æ Inc., 12 Jan 2026, /statistics/216518/leading-us-health-insurance-groups-in-the-us/
American Medical Association, Market share of leading health insurance companies in the United States in 2014 and 2024, by total enrollments ÌÇÐÄÆƽâ°æ, /statistics/216518/leading-us-health-insurance-groups-in-the-us/ (last visited August 01, 2026)
Market share of leading health insurance companies in the United States in 2014 and 2024, by total enrollments [Graph], American Medical Association, January 12, 2026. [Online]. Available: /statistics/216518/leading-us-health-insurance-groups-in-the-us/
