From 2017 to 2022, the companies marked up prices at their pharmacies by hundreds or thousands of percent, netting them $7.3 billion in revenue.

The nation's three largest pharmacy benefit managers have significantly marked up the prices of certain medicines, including for heart disease, cancer and HIV, at their affiliated pharmacies, the U.S.

Pharmacy benefit managers, which serve as the middlemen between drug makers, insurers and pharmacies, reaped $7.3 billion in revenue from marking up the prices of dozens of specialty generic drugs between 2017 and 2022,