At the beginning of this year, employees of the large equipment manufacturer Caterpillar were able to walk into Walgreen’s or Walmart pharmacies and get many generic drugs for free instead of paying a $15 co-payment. Many big companies like Caterpillar normally employ a prescription benefit manager (PBM) to handle and negotiate discount deals with drug manufacturers. The PBM then tacks on a percentage which it charges to its client. By negotiating directly with Walmart and Walgreen’s, Caterpillar will save 30 – 35% on many common drugs. It is a win-win-win for the employees, Caterpillar, and Walmart and Walgreen’s.