United Therapeutics Corporation is an American publicly traded biotechnology company and public benefit corporation listed on the NASDAQ under the symbol UTHR. It develops novel, life-extending technologies for patients in the areas of lung disease and organ manufacturing. United Therapeutics is co-headquartered in Silver Spring, Maryland and Research Triangle Park, North Carolina, with additional facilities in Magog and Bromont, Quebec; Melbourne and Jacksonville, Florida; Blacksburg, Virginia; and Manchester, New Hampshire. Wikipedia