Arrowhead Research is a biotechnology company that develops RNA interference (RNAi) therapeutics. The company was founded in 2007 and is headquartered in Pasadena, California. Arrowhead's RNAi technology targets specific genes to silence their expression, which can be used to treat a variety of diseases. The company's pipeline includes treatments for liver disease, cancer, and cardiovascular disease. Arrowhead has partnerships with pharmaceutical companies such as Amgen and Janssen Pharmaceuticals. The company has received FDA approval for some of its products and is conducting clinical trials for others.