0000879407 2025-09-02 2025-09-02 0000879407 false 8-K 2025-09-02 Arrowhead Pharmaceuticals, Inc. DE 001-38042 46-0408024 177 E. Colorado Blvd Suite 700 Pasadena CA 91105 626 304-3400 false false false false Common Stock, par value $0.001 per share ARWR NASDAQ false