KPMG LLP Suite 1100 4655 Executive Drive San Diego, CA 92121-3132 KPMG LLP, a Delaware limited liability partnership and a member firm of the KPMG global organization of independent member firms affiliated with KPMG International Limited, a private English company limited by guarantee. Consent of Independent Registered Public Accounting Firm We consent to the incorporation by reference in the registration statements (Nos. 333-164039 and 333-161344 ) on Form S-1 and in registration statements (Nos. 333-235324, 333-268665, 333-228598, 333-214315, 333- 214311, 333-213484, 333-202737, 333-191922, 333-188718, 333-178532, 333-178073, 333-178072, 333- 144109, 333-137329, 333-132310, 333-124065, and 333-113065) on Form S-3 and in registration statements (Nos. 333-277477, 333-270779, 333-261847, 333-256255, 333-238616, 333-230621, 333-223836, 333- 210117, 333-202741, 333-198920, 333-194596, 333-190970, 333-180692, 333-170252, 333-136225, 333- 124066, and 333-120072) on Form S-8 of our reports dated November 26, 2024, with respect to the consolidated financial statements of Arrowhead Pharmaceuticals, Inc. and the effectiveness of internal control over financial reporting. San Diego, California November 26, 2024