Bristol-Myers Squibb is engaged in the discovery, development, licensing, manufacturing, marketing, distribution and sale of biopharmaceutical products. The company's products are sold worldwide, primarily to wholesalers, specialty distributors, retail pharmacies, hospitals, government entities and the medical profession. The company manufactures products in the United States and Puerto Rico and has manufacturing operations in two foreign countries. The company has products in the following therapeutic classes: hematology, oncology, cardiovascular and immunology. The company's pharmaceutical products include chemically-synthesized or small molecule drugs and products produced from biological processes, called biologics.

Johnson & Johnson is a holding company engaged in the research and development, manufacture and sale of a range of products in the health care field. The company has three business segments: Consumer, which includes a range of products focused on personal healthcare used in the beauty, over-the-counter pharmaceutical, baby care, oral care, women's health and wound care markets; Pharmaceutical, which is focused on six therapeutic areas: immunology, infectious diseases, neuroscience, oncology, cardiovascular and metabolism and pulmonary hypertension; and Medical Devices, which includes products used in the orthopaedic, surgery, interventional solutions, and eye health fields.

Merck & Co. is a global health care company that delivers health solutions through its prescription medicines, vaccines, biologic therapies and animal health products. The company's segments are: Pharmaceutical, which includes human health pharmaceutical products that consist of therapeutic and preventive agents for the treatment of human disorders, and human health vaccine products that consist of preventive pediatric, adolescent and adult vaccines; and Animal Health, which discovers, develops, manufactures and markets veterinary pharmaceuticals, vaccines and health management solutions and services, as well as a suite of digitally connected identification, traceability and monitoring products.

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.