Mark Walchirk

Part of Patterson Cos., Inc., Patterson (PDCO) Holdings UK Ltd. functions as an investment holding company. The company is based in Stoke-on-Trent, UK.

Part of Patterson Cos., Inc., National Veterinary Services Ltd. is a supplier of veterinary pharmaceuticals. The company is based in Stoke-on-Trent, UK. The British company was founded in 1989 by Peter Ashton. The CEO is Martin Holt Riley.

McKesson Pharmaceutical distributes and supplies healthcare services, and medical supplies and equipment. It offers adherence solutions, asset management, audit intervention service, behavioral coaching, central fill, clinical trials, clinical solutions, dental conversion, express coverage, frontedge, group purchasing organization services, and managed care optimizer. The company was founded and is headquartered in San Francisco, CA.

Healthcare Distribution Alliance operates membership organizations. The firm distributes healthcare and pharmaceutical products. It delivers to pharmacies, hospitals, nursing homes, and health clinics. It provides members to share industry practices, represents member concerns before Congress and regulatory agencies, and publishes newsletters. The company is headquartered in Arlington, VA.

GS1 US, Inc. operates a non-profit charity for global commerce. The company is headquartered in Ewing, NJ.