XML 48 R31.htm IDEA: XBRL DOCUMENT
v3.25.1

Stock-Based Compensation (Tables) | 6 Months Ended
--- | ---
Mar. 31, 2025
Share-Based Payment Arrangement [Abstract] |
Schedule of Awards Outstanding | The following table presents a summary of awards outstanding attributable to Arrowhead Pharmaceuticals, Inc.:
|  | March 31, 2025
|  | 2013 Plan |  | 2021 Plan |  | Inducement Awards |  | Total
Granted and outstanding awards: |  |  |  |  |  |  |  |
Options |  | 891,211 |  |  | 32,151 |  |  | 602,355 |  |  | 1,525,717 |
Restricted stock units |  | 1,500,000 |  |  | 3,939,734 |  |  | 494,009 |  |  | 5,933,743 |
Total |  | 2,391,211 |  |  | 3,971,885 |  |  | 1,096,364 |  |  | 7,459,460 |
Schedule of Share-Based Payment Arrangement, Expensed | The following table summarizes stock-based compensation expenses included in operating expenses:
| Three Months Ended March 31, |  | Six Months Ended March 31,
| 2025 |  | 2024 |  | 2025 |  | 2024
| (in thousands)
Research and development | $ | 7,264 |  |  | $ | 7,097 |  |  | $ | 14,110 |  |  | $ | 15,413 |
General and administrative | 7,817 |  |  | 9,491 |  |  | 15,147 |  |  | 18,860 |
Total | $ | 15,081 |  |  | $ | 16,588 |  |  | $ | 29,257 |  |  | $ | 34,273 |
Schedule of Summarized Information about Stock Options | The following table presents a summary of the stock option activity for the six months ended March 31, 2025:
| Shares |  | Weighted- Average Exercise Price Per Share |  | Weighted- Average Remaining Contractual Term (Years) |  | Aggregate Intrinsic Value
Outstanding at September 30, 2024 | 1,978,516 |  | $ | 23.39 |  |  |  |  |
Granted | — |  | — |  |  |  |  |
Cancelled or expired | (30,466) |  | 43.12 |  |  |  |  |
Exercised | (422,333) |  | 7.67 |  |  |  |  |
Outstanding at March 31, 2025 | 1,525,717 |  | $ | 27.35 |  |  | 3.7 |  | $ | 3,831,887 |
Exercisable at March 31, 2025 | 1,525,717 |  | $ | 27.35 |  |  | 3.7 |  | $ | 3,831,887 |
Schedule of Share Activity Related to RSUs | The following table summarizes the activity of the Company’s RSUs:
| Number of RSUs |  | Weighted- Average Grant Date Fair Value Per Share
Outstanding at September 30, 2024 | 4,913,312 |  | $ | 49.61 |
Granted | 2,576,819 |  | 19.88 |
Vested | (1,337,263) |  | 44.15 |
Forfeited | (219,125) |  | 33.97 |
Outstanding at March 31, 2025 | 5,933,743 |  | $ | 38.49 |

X
- References No definition available. + Details
Name: | us-gaap_DisclosureOfCompensationRelatedCostsSharebasedPaymentsAbstract
Namespace Prefix: | us-gaap_
Data Type: | xbrli:stringItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of allocation of amount expensed and capitalized for award under share-based payment arrangement to statement of income or comprehensive income and statement of financial position. Includes, but is not limited to, corresponding line item in financial statement. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Topic 718 -SubTopic 10 -Section 50 -Paragraph 2 -Subparagraph (h)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfEmployeeServiceShareBasedCompensationAllocationOfRecognizedPeriodCostsTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of activity for award under share-based payment arrangement. Includes, but is not limited to, outstanding award at beginning and end of year, granted, exercised, forfeited, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(2) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure of the number and weighted-average grant date fair value for restricted stock units that were outstanding at the beginning and end of the year, and the number of restricted stock units that were granted, vested, or forfeited during the year. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationRestrictedStockUnitsAwardActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration

X
- Definition Tabular disclosure for stock option plans. Includes, but is not limited to, outstanding awards at beginning and end of year, grants, exercises, forfeitures, and weighted-average grant date fair value. + References Reference 1: http://fasb.org/us-gaap/role/ref/legacyRef -Topic 718 -SubTopic 10 -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (c)(1) -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 2: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (d) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 Reference 3: http://fasb.org/us-gaap/role/ref/legacyRef -Name Accounting Standards Codification -Section 50 -Paragraph 2 -Subparagraph (e) -SubTopic 10 -Topic 718 -Publisher FASB -URI https://asc.fasb.org/1943274/2147480429/718-10-50-2 + Details
Name: | us-gaap_ScheduleOfShareBasedCompensationStockOptionsActivityTableTextBlock
Namespace Prefix: | us-gaap_
Data Type: | dtr-types:textBlockItemType
Balance Type: | na
Period Type: | duration