
Actelion Pharmaceuticals US, Inc is a subsidiary of Actelion Pharmaceuticals Ltd, a global biopharmaceutical company headquartered in Allschwil/Basel, Switzerland.
Located in South San Francisco, our offices are situated in the hub of California's pharmaceutical and biotech development region. Together with other Actelion subsidiaries in 28 countries around the world, we are focused on the development and commercialization of innovative treatments to serve critical, unmet medical needs.