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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":455433,"source":{"system":"sec-edgar","filing":"0001628280-25-000805","document":"wk-form4_1736303271.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828025000805/wk-form4_1736303271.xml","form_type":"4"}},{"id":1309098,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-01-08T02:27:58.000Z","date":"2025-01-07","kind":"sale","planned":true,"acquired":false,"shares":8000,"price":19.7,"value":157600.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $ 19.64 to $ 19.79, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"Partial disposition of RSUs to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":465433,"source":{"system":"sec-edgar","filing":"0001628280-25-000805","document":"wk-form4_1736303271.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828025000805/wk-form4_1736303271.xml","form_type":"4"}},{"id":1309097,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-01-08T02:27:58.000Z","date":"2025-01-06","kind":"sale","planned":true,"acquired":false,"shares":9402,"price":20.1,"value":188980.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $20.01 to $20.20, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"Partial disposition of RSUs to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":473433,"source":{"system":"sec-edgar","filing":"0001628280-25-000805","document":"wk-form4_1736303271.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828025000805/wk-form4_1736303271.xml","form_type":"4"}},{"id":1309096,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-01-08T02:27:58.000Z","date":"2025-01-06","kind":"sale","planned":true,"acquired":false,"shares":17765,"price":19.68,"value":349615.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $19.18 to $20.00, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"Partial disposition of RSUs to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":482835,"source":{"system":"sec-edgar","filing":"0001628280-25-000805","document":"wk-form4_1736303271.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828025000805/wk-form4_1736303271.xml","form_type":"4"}},{"id":1309095,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2025-01-08T02:27:58.000Z","date":"2025-01-04","kind":"grant","planned":true,"acquired":true,"shares":100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying restricted stock units with a grant date 01/04/2025, which will vest in four equal annual installments."}],"balance_after":500600,"source":{"system":"sec-edgar","filing":"0001628280-25-000805","document":"wk-form4_1736303271.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828025000805/wk-form4_1736303271.xml","form_type":"4"}},{"id":1587953,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-03-08T22:54:54.000Z","date":"2024-03-06","kind":"sale","planned":false,"acquired":false,"shares":40000,"price":35.19,"value":1407600.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $ 35.00 to $35.53, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":400600,"source":{"system":"sec-edgar","filing":"0001628280-24-010062","document":"wk-form4_1709938483.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828024010062/wk-form4_1709938483.xml","form_type":"4"}},{"id":1684803,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-01-08T22:16:49.000Z","date":"2024-01-05","kind":"sale","planned":true,"acquired":false,"shares":8904,"price":35.65,"value":317427.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $35.51 to $35.93, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"Partial disposition of RSUs to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":440600,"source":{"system":"sec-edgar","filing":"0001628280-24-000866","document":"wk-form4_1704752198.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828024000866/wk-form4_1704752198.xml","form_type":"4"}},{"id":1684802,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-01-08T22:16:49.000Z","date":"2024-01-05","kind":"sale","planned":true,"acquired":false,"shares":5800,"price":34.97,"value":202826.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $34.48 to $35.42, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"Partial disposition of RSUs to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":449504,"source":{"system":"sec-edgar","filing":"0001628280-24-000866","document":"wk-form4_1704752198.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828024000866/wk-form4_1704752198.xml","form_type":"4"}},{"id":1684801,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-01-08T22:16:49.000Z","date":"2024-01-05","kind":"sale","planned":true,"acquired":false,"shares":1400,"price":34.04,"value":47656.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"Shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $33.46 to $34.44, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"acquired","element":"transactionAcquiredDisposedCode","label":"F3","text":"Partial disposition of RSUs to satisfy tax withholding obligations."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":455304,"source":{"system":"sec-edgar","filing":"0001628280-24-000866","document":"wk-form4_1704752198.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828024000866/wk-form4_1704752198.xml","form_type":"4"}},{"id":1684800,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2024-01-08T22:16:49.000Z","date":"2024-01-04","kind":"grant","planned":true,"acquired":true,"shares":75000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying restricted stock units with a grant date 01/04/24, which will vest in four equal annual installments."}],"balance_after":456704,"source":{"system":"sec-edgar","filing":"0001628280-24-000866","document":"wk-form4_1704752198.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828024000866/wk-form4_1704752198.xml","form_type":"4"}},{"id":1842310,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-06-29T22:41:22.000Z","date":"2023-06-27","kind":"sale","planned":false,"acquired":false,"shares":15000,"price":36.2,"value":543000.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported on Column 4 is the weighted average price. These shares were sold in multiple transactions at prices ranging from $36.08 to $36.26, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":381704,"source":{"system":"sec-edgar","filing":"0001628280-23-023950","document":"wf-form4_168807847193372.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000162828023023950/wf-form4_168807847193372.xml","form_type":"4"}},{"id":2064210,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2023-01-06T00:14:59.000Z","date":"2023-01-04","kind":"grant","acquired":true,"shares":60000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares underlying a restricted stock unit, which shares will vest in four equal annual installments, with a commencement date of 1/4/23."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":396704,"source":{"system":"sec-edgar","filing":"0001209191-23-002116","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919123002116/doc4.xml","form_type":"4"}},{"id":2074599,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-12-30T22:12:25.000Z","date":"2022-12-29","kind":"sale","acquired":false,"shares":30625,"price":40,"value":1225000.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported on Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $40.00 to $40.02, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":336704,"source":{"system":"sec-edgar","filing":"0001209191-22-063020","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919122063020/doc4.xml","form_type":"4"}},{"id":2149039,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-09-30T21:32:53.000Z","date":"2022-06-15","kind":"gift","acquired":false,"shares":96676,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":367329,"source":{"system":"sec-edgar","filing":"0001209191-22-051673","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919122051673/doc5.xml","form_type":"5"}},{"id":2442182,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-01-07T01:58:50.000Z","date":"2022-01-05","kind":"sale","acquired":false,"shares":3786,"price":63.95,"value":242114.7,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was made to generate proceeds to cover the tax liability incident to the vesting of restricted stock units. The shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $63.82 to $64.35, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Includes previously reported shares of common stock underlying Restricted Stock Units granted to the Reporting person which are subject to certain vesting conditions."}],"balance_after":464005,"source":{"system":"sec-edgar","filing":"0001209191-22-002290","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919122002290/doc4.xml","form_type":"4"}},{"id":2442181,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-01-07T01:58:50.000Z","date":"2022-01-05","kind":"sale","acquired":false,"shares":3778,"price":63.17,"value":238656.26,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was made to generate proceeds to cover the tax liability incident to the vesting of restricted stock units. The shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $62.69 to $63.69, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":467791,"source":{"system":"sec-edgar","filing":"0001209191-22-002290","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919122002290/doc4.xml","form_type":"4"}},{"id":2442180,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-01-07T01:58:50.000Z","date":"2022-01-05","kind":"sale","acquired":false,"shares":16528,"price":62,"value":1024736.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was made to generate proceeds to cover the tax liability incident to the vesting of restricted stock units. The shares were sold pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $61.63 to $62.63, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead Pharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":471569,"source":{"system":"sec-edgar","filing":"0001209191-22-002290","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919122002290/doc4.xml","form_type":"4"}},{"id":2442179,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2022-01-07T01:58:50.000Z","date":"2022-01-05","kind":"sale","acquired":false,"shares":15908,"price":60.5,"value":962434.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale was made to generate proceeds to cover the tax liability incident to the vesting of restricted stock units. 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These shares were sold in multiple transactions at prices ranging from $69.51 to\n$70.06, inclusive. The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":427668,"source":{"system":"sec-edgar","filing":"0001209191-20-058075","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120058075/doc4.xml","form_type":"4"}},{"id":2984966,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-11-12T22:49:23.000Z","date":"2020-11-09","kind":"sale","acquired":false,"shares":25840,"price":69.04,"value":1783993.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities\nExchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported on Column 4 is a weighted average price. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":445333,"source":{"system":"sec-edgar","filing":"0001209191-20-058075","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120058075/doc4.xml","form_type":"4"}},{"id":2984965,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-11-12T22:49:23.000Z","date":"2020-11-09","kind":"exercise","acquired":true,"shares":43505,"price":14.54,"value":632562.7,"ownership":{"direct":true},"balance_after":471173,"source":{"system":"sec-edgar","filing":"0001209191-20-058075","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120058075/doc4.xml","form_type":"4"}},{"id":3001786,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (right to buy)","published_at":"2020-10-22T22:02:25.000Z","date":"2020-10-20","kind":"exercise","acquired":false,"shares":29166,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents the first vesting date. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":427668,"source":{"system":"sec-edgar","filing":"0001209191-20-055599","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120055599/doc4.xml","form_type":"4"}},{"id":3001784,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-10-22T22:02:25.000Z","date":"2020-10-20","kind":"exercise","acquired":true,"shares":29166,"price":6.15,"value":179370.9,"ownership":{"direct":true},"balance_after":456834,"source":{"system":"sec-edgar","filing":"0001209191-20-055599","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120055599/doc4.xml","form_type":"4"}},{"id":3244866,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Stock Option (right to buy)","published_at":"2020-02-27T22:41:12.000Z","date":"2020-02-25","kind":"exercise","acquired":false,"shares":10834,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents the first vesting date. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":384223,"source":{"system":"sec-edgar","filing":"0001209191-20-004722","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120004722/doc4.xml","form_type":"4"}},{"id":3304616,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-01-23T23:15:02.000Z","date":"2020-01-21","kind":"sale","acquired":false,"shares":10680,"price":51.11,"value":545854.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"The price reported on Column 4 is a weighted average price. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":387673,"source":{"system":"sec-edgar","filing":"0001209191-20-004722","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120004722/doc4.xml","form_type":"4"}},{"id":3304615,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-01-23T23:15:02.000Z","date":"2020-01-21","kind":"sale","acquired":false,"shares":2800,"price":49.98,"value":139944.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"The price reported on Column 4 is a weighted average price. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":398353,"source":{"system":"sec-edgar","filing":"0001209191-20-004722","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120004722/doc4.xml","form_type":"4"}},{"id":3304614,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-01-23T23:15:02.000Z","date":"2020-01-21","kind":"sale","acquired":false,"shares":10554,"price":49.07,"value":517884.78,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported on Column 4 is a weighted average price. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":401153,"source":{"system":"sec-edgar","filing":"0001209191-20-004722","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120004722/doc4.xml","form_type":"4"}},{"id":3304613,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-01-23T23:15:02.000Z","date":"2020-01-21","kind":"sale","acquired":false,"shares":6432,"price":47.93,"value":308285.76,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported on Column 4 is a weighted average price. 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The reporting person undertakes to provide to Arrowhead Pharmaceuticals, Inc., any security holder of Arrowhead\nPharmaceuticals, Inc., or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares\nsold at each separate price within the ranges set forth in this footnote of this Form 4."}],"balance_after":411707,"source":{"system":"sec-edgar","filing":"0001209191-20-004722","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/879407/000120919120004722/doc4.xml","form_type":"4"}},{"id":3304612,"issuer":{"id":3472,"kind":"organization","name":"ARROWHEAD PHARMACEUTICALS, INC."},"owners":[{"id":84362,"kind":"person","name":"Myszkowski Kenneth Allen","position":1,"cik":"0001486672","reported_name":"Myszkowski Kenneth Allen","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Chief Financial Officer"}}],"security":"Common Stock","published_at":"2020-01-23T23:15:02.000Z","date":"2020-01-21","kind":"sale","acquired":false,"shares":6397,"price":47.07,"value":301106.79,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"Open market sale pursuant to a 10b5-1 trading plan adopted by the Reporting Person in accordance with Rule 10b5-1 of the Securities Exchange Act of 1934, as amended."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported on Column 4 is a weighted average price. 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