AstraZeneca is a holding company. Through its subsidiaries, Co. operates as a biopharmaceutical company engaged in discovering, developing, manufacturing and commercializing its pipeline of small molecule and biologic prescription medicines, including targeted business development through collaboration, in-licensing and acquisitions. Co. is focused on three main therapy areas: Oncology, Cardiovascular and Metabolic Diseases, and Respiratory. Co. is also selectively active in autoimmunity, infection and neuroscience. In addition, Co. works across small molecules, oligonucleotides and other drug platforms, as well as biologic medicines.

Pfizer is a research-based biopharmaceutical company. The company is engaged in discovering, developing, manufacturing and distributing of healthcare products, including medicines and vaccines. The company manages its commercial operations through three businesses: Pfizer Biopharmaceuticals Group, which includes Oncology, Inflammation and Immunology, Rare Disease, Hospital, Vaccines and Internal Medicine business units, as well as a hospital business unit; Upjohn, which includes the company's solid oral dose brands such as Lyrica, Lipitor, Norvasc, Celebrex, Viagra, and certain generic medicines; and Consumer Healthcare, which is an over-the-counter medicines business.