The world’s biggest healthcare companies in 2018

Humana operates its mail order pharmacy business under the RightSource® brand. Image courtesy of Humana Inc.



  • McKesson Corporation
  • UnitedHealthcare
  • CVS Health
  • AmerisourceBergen Corporation
  • Cardinal Health
  • Express Scripts Holding
  • Anthem Inc
  • Kaiser Permanente
  • Aetna Inc
  • Humana