United Therapeutics Corp. is a biotechnology company, which engages in the development and commercialization of products for patients with chronic and life-threatening conditions. Its products include Adcirca, Orenitram, Remodulin, TYVASO, and Unituxin. The company was founded by Martine A. Rothblatt on June 26, 1996 and is headquartered in Silver Spring, MD.