UnitedHealth Group is the 10th largest company in the world by revenue, according to Fortune's "Global 500" list.
Retailer Walmart topped the list for the 10th year in a row, according to Fortune.
Here is how seven major payers stacked up on the list:
10. UnitedHealth Group
11. CVS Health
35. The Cigna Group
51. Elevance Health
60. Centene
116. Humana
475. Molina Healthcare