What is the profit margin of a health insurance company? Google suggests 2-4%, with United at about 6%. This does not seem that extravagant.

Something around half of UnitedHealth Group (UHN) profits come from other business units that aren't directly related to UnitedHealthcare insurance plans. They have a huge software business under the Optum brand that would be one of the top 20 largest US tech companies if it was broken out separately.

That means the insurer part makes even less profit.