Actelion Ltd. develops, produces and markets pharmaceutical drugs. The firm specializes in research, development, manufacturing, and distribution of pharmaceutical, biological, and diagnostic products. The company was founded by Jean-Paul Clozel, Martine Clozel, Walter Fischli, André J. Müller and Thomas Widmann on December 30, 1999 and is headquartered in Allschwil, Switzerland.
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