Which Company is the Most Popular?

Frequently we are asked, “which company is the most popular”. There is wisdom in this question, because if millions of people have had to make the same decision you are have chosen one company or plan over another, there might be good reason for it. Certainly we wouldn’t expect a company to become very large by doing a bad job. This article looks at which companies are the largest in each type of insurance we offer.

Most Popular Medicare Advantage Companies

According to research group Mark Farrah and Associates as of 2025 these were the most popular companies for Medicare Advantage plans

  1. UnitedHealthcare / AARP - 28.7% market share

  2. Humana - 16.6% market share

  3. CVS / Aetna - 12.0% market share

  4. Elevance / Anthem Blue Cross Blue Shield - 6.4% market share

  5. Kaiser - 5.6% market share

  6. All others - 30.7% market share

Most Popular Medicare Supplement Companies

According to research group Mark Farrah and Associates as of 2025 these were the most popular companies for Medicare Supplement plans

  1. UnitedHealthcare / AARP - 31.9% market share

  2. Mutual of Omaha - 9.8% market share

  3. CVS / Aetna - 7.8% market share

  4. Elevance / Anthem Blue Cross Blue Shield- 4.8% market share

  5. HCSC - Blue Cross Blue Shield - 4.2% market share

  6. All others - 41.5% market share

Most Popular Stand Alone Part D Drug Plan Companies

According to research from Kaiser Family Foundation, as of 2025, these were the most popular companies for Medicare Part D drug plan coverage

  1. Centene / Wellcare - 33.9% market share

  2. CVS / Aetna - 17.7% market share

  3. UnitedHealthcare - 15.5% market share

  4. Cigna (Now Healthspring) - 12.8% market share

  5. Humana - 9.8% market share

  6. All others - 10.6% market share