Arrowhead Pharmaceuticals, Inc. develops medicines for the treatment of intractable diseases in the United States. The company's products in pipeline includes ARO-AAT, a RNA interference (RNAi) therapeutic candidate that is in Phase II clinical trial for the treatment of liver diseases associated with alpha-1 antitrypsin deficiency; ARO-APOC3, which is in phase 2b and one phase 3 clinical trial to treat hypertriglyceridemia; ARO-ANG3 that is in Phase 2b clinical trial to reduce production of angiopoietin-like protein 3; ARO-HSD, which is in Phase 1/2a clinical trial to treat liver diseases; ARO-ENaC, which is in a Phase 1/2a clinical trial to reduce production of the epithelial sodium channel alpha subunit in the airways of the lung; ARO-C3 for the treatment of complement-mediated disease that is in Phase 1/2a clinical trial; ARO-Lung2 for the treatment of chronic obstructive pulmonary disorder; ARO-DUX4 for the treatment of facioscapulohumeral muscular dystrophy; ARO-XDH to treat uncontrolled gout; ARO-COV for the treatment of COVID-19 and other pulmonary-borne pathogens; and ARO-HIF2, which is in phase 1b clinical trial to treat clear cell renal cell carcinoma. It is also involved in the development of JNJ-3989, a subcutaneously administered RNAi therapeutic candidate to treat chronic hepatitis B virus infection; Olpasiran to reduce the production of apolipoprotein A; and ARO-AMG1 for treating genetically validated cardiovascular targets. Arrowhead Pharmaceuticals, Inc. has a license and research collaboration agreement with Janssen Pharmaceuticals, Inc. to develop ARO-JNJ1, ARO-JNJ2, and ARO-JNJ3 RNAi therapeutics for liver-expressed targets; and license and research collaboration agreement with Takeda Pharmaceuticals U.S.A., Inc. to develop RNAi therapeutic candidate as a treatment for liver disease. Arrowhead Pharmaceuticals, Inc. was incorporated in 1989 and is headquartered in Pasadena, California.