Additional Proxy Soliciting Materials (Form DEFA14A)

Arrowhead Pharmaceuticals Inc. published this content on January 27, 2026, and is solely responsible for the information contained herein. Distributed via EDGAR on January 27, 2026 at 11:00 UTC. If you believe the information included in the content is inaccurate or outdated and requires editing or removal, please contact us at [email protected]