Company: ARWR
Filing Date: 2025-10-10
Form Type: 10-K/A
Source: 0000879407-25-000013
Chunk: 50

Company: ARROWHEAD PHARMACEUTICALS, INC.
Filing Date: 2025-10-10
Form: 10-K/A
Chunk 50
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 table sets forth the aggregate audit fees and other services provided during the indicated fiscal years. These include amounts billed and expected to be billed by our current independent auditors, KPMG, for fiscal year 2024, and by our former independent auditors, RS&J, for fiscal year 2023:

# PART IV

## ITEM 15.

## EXHIBITS AND FINANCIAL STATEMENT SCHEDULES
(3) Exhibits.

The following exhibits are filed as part of this Form 10-K/A:

| Exhibit  
 Number   |     | Description                                                                                                                                              |
| 31.1*    |     | Certification of Chief Executive Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002                                                       |
| 31.2*    |     | Certification of Chief Financial Officer pursuant to Section 302 of the Sarbanes-Oxley Act of 2002                                                       |
| 101.INS* |     | Inline XBRL Taxonomy Extension Instance Document                                                                                                         |
| 101.SCH* |     | Inline XBRL Taxonomy Extension Schema Document                                                                                                           |
| 101.CAL* |     | Inline XBRL Taxonomy Extension Calculation Linkbase Document                                                                                             |
| 101.LAB* |     | Inline XBRL Taxonomy Extension Label Linkbase Document                                                                                                   |
| 101.PRE* |     | Inline XBRL Taxonomy Extension Presentation Linkbase Document                                                                                            |
| 101.DEF* |     | Inline XBRL Taxonomy Extension Definition Linkbase Document                                                                                              |
| 104*     |     | The cover page from the Company’s Annual Report on Form 10-K/A for the year ended September 30, 2024, formatted in Inline XBRL (included as Exhibit 101) |

* Filed herewith

### SIGNATURE
Pursuant to the requirements of Section 13 or 15(d) of the Securities Exchange Act of 1934, the Registrant has duly caused this report on Form 10-K/A to be signed on its behalf by the undersigned, thereunto duly authorized.

Dated: October 10, 2025

| ARROWHEAD PHARMACEUTICALS, INC. |     |                          |
| By:                             |     | /s/ Christopher Anzalone |
|                                 |     | Christopher Anzalone     |
|                                 |     | Chief Executive Officer  |

Pursuant to the requirements of the Securities Exchange Act of 1934, this report