United Therapeutics Corp. engages in the development and commercialization of innovative products for patients with chronic and life-threatening diseases. It markets and sells commercial therapies to treat pulmonary arterial hypertension, high-risk neuroblastoma. It is also involved in the research and development of new indications and delivery devices for its product, and for the organ transplantation-related technologies. The company was founded by Martine A. Rothblatt on June 26, 1996 and is headquartered in Silver Spring, MD.