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Breaux Castleman

Mr. Castleman has served as a director of Ionis since June 2013. Since August 2001, Mr. Castleman has been president and chief executive officer of Syntiro Healthcare Services, Inc., a healthcare investment company, which sold its operations as a service provider of integrated care management and disease management. Mr. Castleman was a director of USMD Holdings, Inc., a physician-led integrated healthcare system, from September 2009 until October 2016 and was a director of MELA Sciences, Inc., a medical device company, from 2003 until 2011.