Company: ARWR
Filing Date: 2025-01-29
Form Type: ARS
Source: 0001628280-25-002866
Chunk: 150

Company: ARROWHEAD PHARMACEUTICALS, INC.
Filing Date: 2025-01-29
Form: ARS
Chunk 150
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act any other matters that may properly come before the Annual Meeting or any adjournments or postponements thereof. The foregoing items of business are more fully described in the Proxy Statement accompanying this Notice. Proposal No. 1 relates solely to the election of the eight directors nominated by the Board of Directors and does not include any other matters relating to the election of directors, including, without limitation, the election of directors nominated by any stockholder of the Company. Table of Contents Arrowhead Pharmaceuticals, Inc. ● 177 E. Colorado Blvd., Suite 700 ● Pasadena, California 91105

All stockholders of record are cordially invited to attend the Annual Meeting by visiting www.virtualshareholdermeeting.com/ARWR2025. Instructions for accessing the virtual Annual Meeting are provided in the Proxy Statement. In the event of a technical malfunction or other situation that the meeting chair determines may affect the ability of the Annual Meeting to satisfy the requirements for a meeting of stockholders to be held by means of remote communication under the Delaware General Corporation Law, or that otherwise makes it advisable to adjourn the Annual Meeting, the chair or secretary of the Annual Meeting will convene the meeting at 10:30 a.m., Pacific Time on the date specified above and at the Company’s address specified below solely for the purpose of adjourning the meeting to reconvene at a date, time and physical or virtual location announced by the meeting chair. Under either of the foregoing circumstances, we will post information regarding the announcement on the Investors page of the Company’s website at ir.arrowheadpharma.com. If you prefer to receive paper copies of our proxy materials, please follow the instructions included in the Notice of Internet Availability. To ensure your representation at the meeting, you are urged to vote via the Internet or telephone as instructed in the Notice of Internet Availability, or to mark, sign, date and return the proxy card as promptly as possible in the postage- prepaid envelope enclosed for that purpose. Any stockholder of record attending the Annual Meeting may vote at the Annual Meeting even if such stockholder has previously returned a proxy. /s/ Patrick O’Brien Patrick O’Brien Secretary Pasadena, California January 28, 2025 Table of Contents Arrowhead Pharmaceuticals, Inc. ● 177 E. Colorado Blvd., Suite 700 ● Pasadena, California 91105

Table of Contents General Information Concerning Solicitation and Voting 1 Record Date 2 Revocability of Proxies 2 Voting and Solicitation 2 Quorum; Abstentions; Broker Non-V