Tranche Update on McKesson Corporation's Equity Buyback Plan announced on May 24, 2018.

McKesson Corporation specializes in pharmaceutical product distribution. The group also offers technological services to healthcare companies. Net sales break down by activity as follows: - distribution of pharmaceutical products (87%); - distribution of medical and surgical products (4%); - other (1.6%): primarily technology services and software sales. The remaining net sales (7.4%) are from international activities.