Walgreens Boots Alliance, Inc. is a holding company that owns Walgreens, Boots and a number of pharmaceutical manufacturing, wholesale and distribution companies. The company operates in three segments: Retail Pharmacy USA, Retail Pharmacy International and Pharmaceutical Wholesale. The Retail Pharmacy USA segment sells prescription and non-prescription drugs, as well as general merchandise. The Retail Pharmacy International segment includes pharmacy-led health and beauty retail businesses and optical practices. The Pharmaceutical Wholesale segment supplies medicines, other healthcare products and related services to pharmacies, doctors, health centers and hospitals. Walgreens Boots Alliance is headquartered in Deerfield, Illinois and operates in over 25 countries.