Ionis Pharmaceuticals, Inc. engages in the development and commercialization of human therapeutic drugs using antisense technology. It operates through the Ionis Core and Akcea Therapeutics segments. The Ionis Core segment exploits a novel drug discovery platform to generate a pipeline of drugs. The Akcea Therapeutics segment develops and commercializes drugs for cardiometabolic diseases. The company was founded by Stanley T. Crooke, David J. Ecker, Christopher K. Mirabelli and Brett P. Monia in 1989 and is headquartered in Carlsbad, CA.