Of these companies, only UnitedHealth has announced its second quarter earnings. Coventry Health Care is set to announce earnings on July 28; Aetna and WellPoint on July 29; Cigna on July 30 and Humana on Aug. 3.
Still, UnitedHealth did make healthy profits, and we asked Steve Shubitz, a health care financial analyst with the investment firm Edward Jones, about it.
"The profits are still significant, there's no question about that. But the reality is they're losing a lot of customers in this economy," Shubitz said.
When companies lay off workers and the workers lose their health insurance, the insurance companies lose customers, and that's why UnitedHealth has seen declining enrollments, he added.