0002100121-26-000087.txt : 20260428 0002100121-26-000087.hdr.sgml : 20260428 20260428160530 ACCESSION NUMBER: 0002100121-26-000087 CONFORMED SUBMISSION TYPE: SCHEDULE 13G PUBLIC DOCUMENT COUNT: 1 FILED AS OF DATE: 20260428 DATE AS OF CHANGE: 20260428 SUBJECT COMPANY: COMPANY DATA: COMPANY CONFORMED NAME: ARROWHEAD PHARMACEUTICALS, INC. CENTRAL INDEX KEY: 0000879407 STANDARD INDUSTRIAL CLASSIFICATION: PHARMACEUTICAL PREPARATIONS [2834] ORGANIZATION NAME: 03 Life Sciences EIN: 460408024 STATE OF INCORPORATION: DE FISCAL YEAR END: 0930 FILING VALUES: FORM TYPE: SCHEDULE 13G SEC ACT: 1934 Act SEC FILE NUMBER: 005-48710 FILM NUMBER: 26907587 BUSINESS ADDRESS: STREET 1: 177 E COLORADO BLVD STREET 2: SUITE 700 CITY: PASADENA STATE: CA ZIP: 91105 BUSINESS PHONE: 626-696-4702 MAIL ADDRESS: STREET 1: 177 E COLORADO BLVD STREET 2: SUITE 700 CITY: PASADENA STATE: CA ZIP: 91105 FORMER COMPANY: FORMER CONFORMED NAME: ARROWHEAD RESEARCH CORP DATE OF NAME CHANGE: 20040112 FORMER COMPANY: FORMER CONFORMED NAME: INTERACTIVE GROUP INC DATE OF NAME CHANGE: 20020509 FORMER COMPANY: FORMER CONFORMED NAME: INTERACTIVE INC DATE OF NAME CHANGE: 19940224 FILED BY: COMPANY DATA: COMPANY CONFORMED NAME: VANGUARD PORTFOLIO MANAGEMENT LLC CENTRAL INDEX KEY: 0002100121 ORGANIZATION NAME: EIN: 392888838 STATE OF INCORPORATION: PA FISCAL YEAR END: 1231 LEGAL ENTITY IDENTIFIER: 529900YN99W7NU4H6B84 FILING VALUES: FORM TYPE: SCHEDULE 13G BUSINESS ADDRESS: STREET 1: 100 VANGUARD BLVD CITY: MALVERN STATE: PA ZIP: 19355 BUSINESS PHONE: 610-669-6148 MAIL ADDRESS: STREET 1: 100 VANGUARD BLVD CITY: MALVERN STATE: PA ZIP: 19355 SCHEDULE 13G 1 primary_doc.xml X0202 SCHEDULE 13G 0002100121 XXXXXXXX LIVE Common Stock 03/31/2026 0000879407 Arrowhead Pharmaceuticals Inc 04280A100 177 East Colorado Blvd Suite 700 Pasadena CA 91105 Rule 13d-1(b) Vanguard Portfolio Management PA 123821 0 7269957 0 7269957 5.19 IA In accordance with SEC Release No. 34-39538 (January 12, 1998), this Schedule 13G reflects the securities beneficially owned, or deemed to be beneficially owned, by Vanguard Portfolio Management LLC and the following affiliates of Vanguard Portfolio Management LLC or business divisions of such affiliates: Vanguard Fiduciary Trust Company and Vanguard Global Advisers, LLC. This Schedule 13G includes securities held by Vanguard funds, or sleeves thereof, over which Vanguard Portfolio Management LLC exercises dispositive power, in addition to securities held by clients over which the affiliates or business divisions of such affiliates indicated above exercise dispositive and/or voting power. This Schedule 13G does not include securities, if any, beneficially owned by other subsidiaries or affiliates of Vanguard Portfolio Management LLC, or business divisions of such subsidiaries whose ownership of securities is disaggregated from that of the reporting business unit in accordance with such release. Arrowhead Pharmaceuticals Inc 177 East Colorado Blvd, Suite 700, Pasadena, CA, 91105 Vanguard Portfolio Management 100 Vanguard Blvd,, Malvern, PA, 19355 PA N IA 7269957 5.19 123821 0 7269957 0 Y N Vanguard Portfolio Management, including investment companies registered under the Investment Company Act of 1940 and other managed accounts, have the right to receive or the power to direct the receipt of dividends from, or the proceeds from the sale of, the securities reported herein.No one other person's interest in the securities reported herein is more than 5%. Y Y Y N By signing below I certify that, to the best of my knowledge and belief, the securities referred to above were acquired and are held in the ordinary course of business and were not acquired and are not held for the purpose of or with the effect of changing or influencing the control of the issuer of the securities and were not acquired and are not held in connection with or as a participant in any transaction having that purpose or effect, other than activities solely in connection with a nomination under § 240.14a-11. Vanguard Portfolio Management Ashley Grim 04/28/2026