Market share of leading U.S. health insurance companies 2018, by direct premiums

In 2018, UnitedHealth Group Inc. was the market leader and had a 14.1 percent share of the U.S. health insurance market, with direct premiums written amounting to approximately 101 billion U.S. dollars. Anthem Inc and Humana Inc followed after with a market share of 9.2 percent and 7.8 percent respectively.

Who are 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.


In 2018, UnitedHealth Group was the largest health insurance company in the United States, followed by Anthem and Aetna. Membership of UnitedHealth reached 50 million in that year, which is roughly one in seven Americans. The company is also among the largest companies worldwide in terms of revenue and the largest health care company in that list.

Market share of leading health insurance companies in the United States in 2018, by direct premiums written

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Release date

August 2019


United States

Survey time period


Supplementary notes

Based on health insurer annual statement data. Does not include health insurance data from the property/casualty and life/health annual statements. Excludes territories.
*CVS Health Corp and Aetna Inc completed a merger in 2018.

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Statistics on "Private health insurance in the United States"

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