{"transactions":[{"id":4626239,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-09-24T20:42:16.000Z","date":"2026-09-22","kind":"grant","planned":false,"acquired":true,"shares":3.9978,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 22, 2026 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":2619.5144,"derivative":{"underlying":"Common Stock","underlying_shares":3.9978},"source":{"system":"sec-edgar","filing":"0001628280-26-063429","document":"wk-form4_1790282534.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1596796/000162828026063429/wk-form4_1790282534.xml","form_type":"4"}},{"id":693413,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-08-07T20:36:12.000Z","date":"2026-08-06","kind":"sale","planned":false,"acquired":false,"shares":25000,"price":54.5,"value":1362500.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $54.48 to $54.62. The Reporting Person hereby undertakes to\nprovide, upon request, to the staff of the Securities and Exchange Commission, the Issuer, or any security holder of the Issuer, full information regarding the number of\nshares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":461732,"source":{"system":"sec-edgar","filing":"0001628280-26-054882","document":"wk-form4_1786134969.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026054882/wk-form4_1786134969.xml","form_type":"4"}},{"id":693412,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-08-07T20:36:12.000Z","date":"2026-08-05","kind":"sale","planned":false,"acquired":false,"shares":25000,"price":55.35,"value":1383750.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $55.31 to $55.43. The Reporting Person hereby undertakes to\nprovide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of\nshares sold at each separate price within the range set forth in this footnote (1) to this Form 4."}],"balance_after":486732,"source":{"system":"sec-edgar","filing":"0001628280-26-054882","document":"wk-form4_1786134969.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026054882/wk-form4_1786134969.xml","form_type":"4"}},{"id":718994,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-07-02T20:35:30.000Z","date":"2026-06-30","kind":"exercise","planned":false,"acquired":false,"shares":8692,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On February 20, 2025, the Reporting Person was granted 43,459 time-vested restricted stock units (\"RSUs\") which vested in five equal quarterly installments on each of June 30, 2025, September 30,\n2025, December 31, 2025, March 31, 2026, and June 30, 2026, such that 100% was vested on June 30, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On February 20, 2025, the Reporting Person was granted 43,459 time-vested restricted stock units (\"RSUs\") which vested in five equal quarterly installments on each of June 30, 2025, September 30,\n2025, December 31, 2025, March 31, 2026, and June 30, 2026, such that 100% was vested on June 30, 2026."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":8692},"source":{"system":"sec-edgar","filing":"0001628280-26-046953","document":"wk-form4_1783024525.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026046953/wk-form4_1783024525.xml","form_type":"4"}},{"id":718993,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-07-02T20:35:30.000Z","date":"2026-06-30","kind":"exercise","planned":false,"acquired":true,"shares":8692,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":511732,"source":{"system":"sec-edgar","filing":"0001628280-26-046953","document":"wk-form4_1783024525.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026046953/wk-form4_1783024525.xml","form_type":"4"}},{"id":726871,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-06-25T20:46:20.000Z","date":"2026-06-23","kind":"grant","planned":false,"acquired":true,"shares":2.5166,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":2615.5166,"derivative":{"underlying":"Common Stock","underlying_shares":2.5166},"source":{"system":"sec-edgar","filing":"0001628280-26-045570","document":"wk-form4_1782420377.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026045570/wk-form4_1782420377.xml","form_type":"4"}},{"id":777602,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-05-15T20:37:56.000Z","date":"2026-05-13","kind":"grant","planned":false,"acquired":true,"shares":2613,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents shares of common stock underlying RSUs granted on May 13, 2026 (the \"Grant Date\") pursuant to the Plan (the \"May 2026 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the May 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The May 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents shares of common stock underlying RSUs granted on May 13, 2026 (the \"Grant Date\") pursuant to the Plan (the \"May 2026 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the May 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The May 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents shares of common stock underlying RSUs granted on May 13, 2026 (the \"Grant Date\") pursuant to the Plan (the \"May 2026 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the May 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The May 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":2613,"derivative":{"underlying":"Common Stock","underlying_shares":2613},"source":{"system":"sec-edgar","filing":"0001628280-26-035658","document":"wk-form4_1778877472.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026035658/wk-form4_1778877472.xml","form_type":"4"}},{"id":777601,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-05-15T20:37:56.000Z","date":"2026-05-13","kind":"exercise","planned":false,"acquired":false,"shares":482,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On April 1, 2026, the Reporting Person was granted 482 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended (the \"Plan\"), and the applicable award agreement (the \"April 2026 RSUs\"). In connection with the vesting of the April 2026 RSUs on May 13, 2026, the April 2026 RSUs converted into\ncommon stock of the Issuer on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On April 1, 2026, the Reporting Person was granted 482 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended (the \"Plan\"), and the applicable award agreement (the \"April 2026 RSUs\"). In connection with the vesting of the April 2026 RSUs on May 13, 2026, the April 2026 RSUs converted into\ncommon stock of the Issuer on a one-for-one basis."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On April 1, 2026, the Reporting Person was granted 482 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended (the \"Plan\"), and the applicable award agreement (the \"April 2026 RSUs\"). In connection with the vesting of the April 2026 RSUs on May 13, 2026, the April 2026 RSUs converted into\ncommon stock of the Issuer on a one-for-one basis."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":482},"source":{"system":"sec-edgar","filing":"0001628280-26-035658","document":"wk-form4_1778877472.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026035658/wk-form4_1778877472.xml","form_type":"4"}},{"id":777600,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-15T20:37:56.000Z","date":"2026-05-13","kind":"exercise","planned":false,"acquired":true,"shares":482,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On April 1, 2026, the Reporting Person was granted 482 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended (the \"Plan\"), and the applicable award agreement (the \"April 2026 RSUs\"). In connection with the vesting of the April 2026 RSUs on May 13, 2026, the April 2026 RSUs converted into\ncommon stock of the Issuer on a one-for-one basis."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On April 1, 2026, the Reporting Person was granted 482 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended (the \"Plan\"), and the applicable award agreement (the \"April 2026 RSUs\"). In connection with the vesting of the April 2026 RSUs on May 13, 2026, the April 2026 RSUs converted into\ncommon stock of the Issuer on a one-for-one basis."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On April 1, 2026, the Reporting Person was granted 482 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended (the \"Plan\"), and the applicable award agreement (the \"April 2026 RSUs\"). In connection with the vesting of the April 2026 RSUs on May 13, 2026, the April 2026 RSUs converted into\ncommon stock of the Issuer on a one-for-one basis."}],"balance_after":503040,"source":{"system":"sec-edgar","filing":"0001628280-26-035658","document":"wk-form4_1778877472.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026035658/wk-form4_1778877472.xml","form_type":"4"}},{"id":783047,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-05-12T20:44:07.000Z","date":"2026-05-08","kind":"sale","planned":false,"acquired":false,"shares":50000,"price":74.28,"value":3714000.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $73.37 to $74.98. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4."}],"balance_after":502558,"source":{"system":"sec-edgar","filing":"0001628280-26-034167","document":"wk-form4_1778618644.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026034167/wk-form4_1778618644.xml","form_type":"4"}},{"id":820846,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-04-02T22:59:26.000Z","date":"2026-04-01","kind":"grant","planned":false,"acquired":true,"shares":482,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents shares of common stock underlying RSUs (the \"Director RSUs\") granted on April 1, 2025 (the \"Grant Date\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended. Subject to the terms and conditions of the applicable award\nagreement, the Director RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's\nfirst annual meeting of stockholders immediately following the Grant Date. The Director RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents shares of common stock underlying RSUs (the \"Director RSUs\") granted on April 1, 2025 (the \"Grant Date\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended. Subject to the terms and conditions of the applicable award\nagreement, the Director RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's\nfirst annual meeting of stockholders immediately following the Grant Date. The Director RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents shares of common stock underlying RSUs (the \"Director RSUs\") granted on April 1, 2025 (the \"Grant Date\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended. Subject to the terms and conditions of the applicable award\nagreement, the Director RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's\nfirst annual meeting of stockholders immediately following the Grant Date. The Director RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":482,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":482},"source":{"system":"sec-edgar","filing":"0001628280-26-023399","document":"wk-form4_1775170763.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026023399/wk-form4_1775170763.xml","form_type":"4"}},{"id":820845,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-04-02T22:59:26.000Z","date":"2026-03-31","kind":"exercise","planned":false,"acquired":false,"shares":8692,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On February 20, 2025, the Reporting Person was granted 43,459 time-vested restricted stock units (\"RSUs\") which vest in five equal quarterly installments on each of June 30, 2025, September 30, 2025, December 31, 2025, March 31,\n2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On February 20, 2025, the Reporting Person was granted 43,459 time-vested restricted stock units (\"RSUs\") which vest in five equal quarterly installments on each of June 30, 2025, September 30, 2025, December 31, 2025, March 31,\n2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."}],"balance_after":8692,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":8692},"source":{"system":"sec-edgar","filing":"0001628280-26-023399","document":"wk-form4_1775170763.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026023399/wk-form4_1775170763.xml","form_type":"4"}},{"id":820844,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-04-02T22:59:26.000Z","date":"2026-03-31","kind":"exercise","planned":false,"acquired":true,"shares":8692,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":552558,"source":{"system":"sec-edgar","filing":"0001628280-26-023399","document":"wk-form4_1775170763.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026023399/wk-form4_1775170763.xml","form_type":"4"}},{"id":880205,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-26T21:16:18.000Z","date":"2026-02-24","kind":"exercise","planned":false,"acquired":false,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units (\"RSUs\") on February 24, 2022 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and vested in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units (\"RSUs\") on February 24, 2022 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and vested in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units (\"RSUs\") on February 24, 2022 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and vested in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":10748},"source":{"system":"sec-edgar","filing":"0001628280-26-012300","document":"wk-form4_1772140576.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026012300/wk-form4_1772140576.xml","form_type":"4"}},{"id":880204,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-26T21:16:18.000Z","date":"2026-02-24","kind":"sale","planned":false,"acquired":false,"shares":20000,"price":48.8,"value":976000.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $48.80 to $48.86. The Reporting Person hereby undertakes to\nprovide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price\nwithin the range set forth in this footnote (1) to this Form 4."}],"balance_after":543866,"source":{"system":"sec-edgar","filing":"0001628280-26-012300","document":"wk-form4_1772140576.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026012300/wk-form4_1772140576.xml","form_type":"4"}},{"id":880203,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-26T21:16:18.000Z","date":"2026-02-24","kind":"exercise","planned":false,"acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":563866,"source":{"system":"sec-edgar","filing":"0001628280-26-012300","document":"wk-form4_1772140576.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026012300/wk-form4_1772140576.xml","form_type":"4"}},{"id":885737,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-24T21:07:34.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":false,"shares":59388,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the \"2025 Grant Date\") pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the \"2025 Grant Date\") pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date."}],"balance_after":118795,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":59388},"source":{"system":"sec-edgar","filing":"0001628280-26-011069","document":"wk-form4_1771967252.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026011069/wk-form4_1771967252.xml","form_type":"4"}},{"id":885736,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-24T21:07:34.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":false,"shares":112941,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units (\"RSUs\") granted on February 20, 2024 (the \"2024 Grant Date\") pursuant to the Issuer's Equity Incentive Plan.  The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and will vest over three years, with 40% of the RSUs vesting on each of the first anniversary and the second anniversary of the 2024 Grant Date, and 20% vesting on the third anniversary of the 2024 Grant Date, such that 100% will be vested on the third anniversary of the 2024 Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units (\"RSUs\") granted on February 20, 2024 (the \"2024 Grant Date\") pursuant to the Issuer's Equity Incentive Plan.  The RSUs were awarded for no consideration other than the Reporting Person's service as a service provider of the Issuer and will vest over three years, with 40% of the RSUs vesting on each of the first anniversary and the second anniversary of the 2024 Grant Date, and 20% vesting on the third anniversary of the 2024 Grant Date, such that 100% will be vested on the third anniversary of the 2024 Grant Date."}],"balance_after":56470,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":112941},"source":{"system":"sec-edgar","filing":"0001628280-26-011069","document":"wk-form4_1771967252.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026011069/wk-form4_1771967252.xml","form_type":"4"}},{"id":885735,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-24T21:07:34.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":true,"shares":59388,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":553118,"source":{"system":"sec-edgar","filing":"0001628280-26-011069","document":"wk-form4_1771967252.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026011069/wk-form4_1771967252.xml","form_type":"4"}},{"id":885734,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-24T21:07:34.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":true,"shares":112941,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":493730,"source":{"system":"sec-edgar","filing":"0001628280-26-011069","document":"wk-form4_1771967252.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026011069/wk-form4_1771967252.xml","form_type":"4"}},{"id":891236,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-20T21:19:12.000Z","date":"2026-02-18","kind":"grant","planned":false,"acquired":true,"shares":30587,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"This Form 4 reports the vesting on February 18, 2026 of 30,587 shares of common stock of the Issuer's underlying PSUs granted to the Reporting Person on February 20, 2025 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2025 and ending on December 31, 2025."}],"balance_after":380789,"source":{"system":"sec-edgar","filing":"0001628280-26-010222","document":"wk-form4_1771622350.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026010222/wk-form4_1771622350.xml","form_type":"4"}},{"id":891235,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-20T21:19:12.000Z","date":"2026-02-18","kind":"grant","planned":false,"acquired":true,"shares":10891,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This Form 4 reports the vesting on February 18, 2026 of 10,891 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") underlying performance-vested restricted stock units (\"PSUs\")\ngranted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic\nearnings per share performance goal over a one-year performance period beginning January 1, 2025 and ending on December 31, 2025."}],"balance_after":350202,"source":{"system":"sec-edgar","filing":"0001628280-26-010222","document":"wk-form4_1771622350.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026010222/wk-form4_1771622350.xml","form_type":"4"}},{"id":897889,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Restricted Stock Units","published_at":"2026-02-18T21:15:02.000Z","date":"2026-02-16","kind":"exercise","planned":true,"acquired":false,"shares":13920,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":13919,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":13920},"source":{"system":"sec-edgar","filing":"0001628280-26-009053","document":"wk-form4_1771449298.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026009053/wk-form4_1771449298.xml","form_type":"4"}},{"id":897888,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-18T21:15:02.000Z","date":"2026-02-17","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":45.89,"value":458900.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 06, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $44.33 to $46.92. The Reporting Person hereby undertakes to\nprovide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of\nshares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":339311,"source":{"system":"sec-edgar","filing":"0001628280-26-009053","document":"wk-form4_1771449298.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026009053/wk-form4_1771449298.xml","form_type":"4"}},{"id":897887,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-02-18T21:15:02.000Z","date":"2026-02-16","kind":"exercise","planned":true,"acquired":true,"shares":13920,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":349311,"source":{"system":"sec-edgar","filing":"0001628280-26-009053","document":"wk-form4_1771449298.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026009053/wk-form4_1771449298.xml","form_type":"4"}},{"id":935840,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":false,"ten_percent_owner":false,"other":false}}],"security":"Common Stock","published_at":"2026-01-20T21:31:17.000Z","date":"2026-01-15","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":53.14,"value":531400.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 06, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $52.25 to $54.00. The Reporting Person hereby undertakes to\nprovide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of\nshares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":335391,"source":{"system":"sec-edgar","filing":"0001628280-26-002639","document":"wk-form4_1768944674.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026002639/wk-form4_1768944674.xml","form_type":"4"}},{"id":952890,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2026-01-05T21:16:42.000Z","date":"2025-12-31","kind":"exercise","planned":false,"acquired":false,"shares":8692,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On February 20, 2025, the Reporting Person was granted 43,459 restricted stock units which vest in five equal quarterly installments on each of June 30, 2025, September 30, 2025, December 31,\n2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On February 20, 2025, the Reporting Person was granted 43,459 restricted stock units which vest in five equal quarterly installments on each of June 30, 2025, September 30, 2025, December 31,\n2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."}],"balance_after":17384,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":8692},"source":{"system":"sec-edgar","filing":"0001628280-26-000440","document":"wk-form4_1767647798.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026000440/wk-form4_1767647798.xml","form_type":"4"}},{"id":952889,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2026-01-05T21:16:42.000Z","date":"2025-12-31","kind":"exercise","planned":false,"acquired":true,"shares":8692,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":345391,"source":{"system":"sec-edgar","filing":"0001628280-26-000440","document":"wk-form4_1767647798.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026000440/wk-form4_1767647798.xml","form_type":"4"}},{"id":965760,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-12-17T21:08:13.000Z","date":"2025-12-15","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":44.8,"value":448000.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 06, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $44.37 to $45.18. The Reporting Person hereby undertakes to\nprovide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of\nshares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":336699,"source":{"system":"sec-edgar","filing":"0001628280-25-057633","document":"wk-form4_1766005690.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828025057633/wk-form4_1766005690.xml","form_type":"4"}},{"id":994367,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-11-19T21:38:54.000Z","date":"2025-11-17","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":31.68,"value":316800.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on June 06, 2025."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.03 to $32.05. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":346699,"source":{"system":"sec-edgar","filing":"0001628280-25-053216","document":"wk-form4_1763588332.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828025053216/wk-form4_1763588332.xml","form_type":"4"}},{"id":1017136,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common 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31,\n2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."}],"balance_after":26076,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":8692},"source":{"system":"sec-edgar","filing":"0001628280-25-043755","document":"wk-form4_1759437312.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828025043755/wk-form4_1759437312.xml","form_type":"4"}},{"id":1027929,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common 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2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."}],"balance_after":34768,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":8691},"source":{"system":"sec-edgar","filing":"0001047127-25-000161","document":"wk-form4_1751494581.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000161/wk-form4_1751494581.xml","form_type":"4"}},{"id":1096169,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common 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Units","published_at":"2025-02-26T21:38:19.000Z","date":"2025-02-24","kind":"exercise","planned":false,"acquired":false,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On February 24, 2022 (the \"Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\")  of Amkor Technology, Inc. (the \"Issuer\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On February 24, 2022 (the \"Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\")  of Amkor Technology, Inc. (the \"Issuer\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On February 24, 2022 (the \"Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\")  of Amkor Technology, Inc. (the \"Issuer\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":10748,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":10748},"source":{"system":"sec-edgar","filing":"0001047127-25-000050","document":"wk-form4_1740605890.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000050/wk-form4_1740605890.xml","form_type":"4"}},{"id":1243864,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-02-26T21:38:19.000Z","date":"2025-02-24","kind":"exercise","planned":false,"acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":359316,"source":{"system":"sec-edgar","filing":"0001047127-25-000050","document":"wk-form4_1740605890.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000050/wk-form4_1740605890.xml","form_type":"4"}},{"id":1253778,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2025-02-21T21:41:52.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":43459,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs granted on the 2025 Grant Date pursuant to the Issuer's Equity Incentive Plan, as amended. The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in five equal installments on each of June 30, 2025, September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs granted on the 2025 Grant Date pursuant to the Issuer's Equity Incentive Plan, as amended. The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in five equal installments on each of June 30, 2025, September 30, 2025, December 31, 2025, March 31, 2026, and June 30, 2026, such that 100% will be vested on June 30, 2026."}],"balance_after":43459,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":43459},"source":{"system":"sec-edgar","filing":"0001047127-25-000036","document":"wk-form4_1740174105.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000036/wk-form4_1740174105.xml","form_type":"4"}},{"id":1253777,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2025-02-21T21:41:52.000Z","date":"2025-02-20","kind":"grant","planned":false,"acquired":true,"shares":178183,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the \"2025 Grant Date\") pursuant to the Issuer's Equity Incentive Plan, as amended. The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the \"2025 Grant Date\") pursuant to the Issuer's Equity Incentive Plan, as amended. The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date."}],"balance_after":178183,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":178183},"source":{"system":"sec-edgar","filing":"0001047127-25-000036","document":"wk-form4_1740174105.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000036/wk-form4_1740174105.xml","form_type":"4"}},{"id":1253776,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2025-02-21T21:41:52.000Z","date":"2025-02-20","kind":"exercise","planned":false,"acquired":false,"shares":112941,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"On February 20, 2024 (the \"2024 Grant Date\"), the Reporting Person was granted 282,352 restricted stock units (\"RSUs\"), 40% of which vest on the first and second anniversary of the 2024 Grant Date, and the remainder of which vest on the third anniversary of the 2024 Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"On February 20, 2024 (the \"2024 Grant Date\"), the Reporting Person was granted 282,352 restricted stock units (\"RSUs\"), 40% of which vest on the first and second anniversary of the 2024 Grant Date, and the remainder of which vest on the third anniversary of the 2024 Grant Date."}],"balance_after":169411,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":112941},"source":{"system":"sec-edgar","filing":"0001047127-25-000036","document":"wk-form4_1740174105.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000036/wk-form4_1740174105.xml","form_type":"4"}},{"id":1253775,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-02-21T21:41:52.000Z","date":"2025-02-20","kind":"exercise","planned":false,"acquired":true,"shares":112941,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":348568,"source":{"system":"sec-edgar","filing":"0001047127-25-000036","document":"wk-form4_1740174105.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000036/wk-form4_1740174105.xml","form_type":"4"}},{"id":1253774,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-02-21T21:41:52.000Z","date":"2025-02-19","kind":"grant","planned":false,"acquired":true,"shares":16736,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This Form 4 reports the vesting on February 19, 2025 of 16,736 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") underlying performance-vested restricted stock units (\"PSUs\") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024."}],"balance_after":235627,"source":{"system":"sec-edgar","filing":"0001047127-25-000036","document":"wk-form4_1740174105.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000036/wk-form4_1740174105.xml","form_type":"4"}},{"id":1261217,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2025-02-19T21:39:07.000Z","date":"2025-02-14","kind":"exercise","planned":false,"acquired":false,"shares":13920,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On February 16, 2023 (the \"Grant Date\"), the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On February 16, 2023 (the \"Grant Date\"), the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":27839,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":13920},"source":{"system":"sec-edgar","filing":"0001047127-25-000019","document":"wk-form4_1740001140.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000019/wk-form4_1740001140.xml","form_type":"4"}},{"id":1261216,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2025-02-19T21:39:07.000Z","date":"2025-02-14","kind":"exercise","planned":false,"acquired":true,"shares":13920,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":218891,"source":{"system":"sec-edgar","filing":"0001047127-25-000019","document":"wk-form4_1740001140.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000019/wk-form4_1740001140.xml","form_type":"4"}},{"id":1385158,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-10-17T20:33:59.000Z","date":"2024-10-15","kind":"sale","planned":true,"acquired":false,"shares":10000,"price":31.51,"value":315100.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2024."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.26 to $31.70. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":204971,"source":{"system":"sec-edgar","filing":"0001047127-24-000197","document":"wk-form4_1729197230.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000197/wk-form4_1729197230.xml","form_type":"4"}},{"id":1403997,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option 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The shares were sold in multiple transactions at prices ranging from $32.16 to $32.82. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":224971,"source":{"system":"sec-edgar","filing":"0001047127-24-000171","document":"wk-form4_1724099591.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000171/wk-form4_1724099591.xml","form_type":"4"}},{"id":1429819,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-08-19T20:33:18.000Z","date":"2024-08-15","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":14.17,"value":212550.0,"ownership":{"direct":true},"balance_after":249971,"source":{"system":"sec-edgar","filing":"0001047127-24-000171","document":"wk-form4_1724099591.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000171/wk-form4_1724099591.xml","form_type":"4"}},{"id":1432806,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-08-15T20:42:55.000Z","date":"2024-08-13","kind":"grant","planned":false,"acquired":true,"shares":106638,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This Form 4 reports the vesting on August 13, 2024 of 106,638 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") underlying performance-vested restricted stock units (\"PSUs\") granted to the Reporting Person on December 14, 2023 pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement.  The PSUs vested based on the achievement of either of two internal performance goals related to geographic expansion of the Issuer's manufacturing footprint and expanding the Issuer's advanced packaging capacity in support of end markets with high growth potential."}],"balance_after":234971,"source":{"system":"sec-edgar","filing":"0001047127-24-000169","document":"wk-form4_1723754570.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000169/wk-form4_1723754570.xml","form_type":"4"}},{"id":1452958,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-07-17T20:35:27.000Z","date":"2024-07-15","kind":"exercise","planned":true,"acquired":false,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date."}],"balance_after":23125,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001047127-24-000153","document":"wk-form4_1721248519.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000153/wk-form4_1721248519.xml","form_type":"4"}},{"id":1452957,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-07-17T20:35:27.000Z","date":"2024-07-15","kind":"sale","planned":true,"acquired":false,"shares":23100,"price":42.99,"value":993069.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price reported in Column 4 is a weighted average price.  The shares were sold in multiple transactions at prices ranging from $42.49 to $43.47.  The Reporting Person hereby undertakes to provide, upon request, to the staff of the SEC, the Issuer, or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (3) to this Form 4."}],"balance_after":128333,"source":{"system":"sec-edgar","filing":"0001047127-24-000153","document":"wk-form4_1721248519.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000153/wk-form4_1721248519.xml","form_type":"4"}},{"id":1452956,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-07-17T20:35:27.000Z","date":"2024-07-15","kind":"sale","planned":true,"acquired":false,"shares":1900,"price":42.34,"value":80446.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sales reported in this Form 4 were effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $42.24 to $42.47. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission (the \"SEC\"), Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":151433,"source":{"system":"sec-edgar","filing":"0001047127-24-000153","document":"wk-form4_1721248519.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000153/wk-form4_1721248519.xml","form_type":"4"}},{"id":1452955,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-07-17T20:35:27.000Z","date":"2024-07-15","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":14.17,"value":212550.0,"ownership":{"direct":true},"balance_after":153333,"source":{"system":"sec-edgar","filing":"0001047127-24-000153","document":"wk-form4_1721248519.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000153/wk-form4_1721248519.xml","form_type":"4"}},{"id":1460754,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2024-07-03T18:56:05.000Z","date":"2024-07-01","kind":"exercise","planned":false,"acquired":false,"shares":43857,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On December 14, 2023 (the \"RSU Grant Date\"), the Reporting Person was granted 43,857 time-vested restricted stock units (\"RSUs\") pursuant to Amkor Technology, Inc.'s (the \"Issuer\") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs converted into shares of the Issuer's common stock on a one-to-one basis and vested in full on July 1, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On December 14, 2023 (the \"RSU Grant Date\"), the Reporting Person was granted 43,857 time-vested restricted stock units (\"RSUs\") pursuant to Amkor Technology, Inc.'s (the \"Issuer\") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs converted into shares of the Issuer's common stock on a one-to-one basis and vested in full on July 1, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On December 14, 2023 (the \"RSU Grant Date\"), the Reporting Person was granted 43,857 time-vested restricted stock units (\"RSUs\") pursuant to Amkor Technology, Inc.'s (the \"Issuer\") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs converted into shares of the Issuer's common stock on a one-to-one basis and vested in full on July 1, 2024."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":43857},"source":{"system":"sec-edgar","filing":"0001047127-24-000151","document":"wk-form4_1720032958.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000151/wk-form4_1720032958.xml","form_type":"4"}},{"id":1460753,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-07-03T18:56:05.000Z","date":"2024-07-01","kind":"exercise","planned":false,"acquired":true,"shares":43857,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":138333,"source":{"system":"sec-edgar","filing":"0001047127-24-000151","document":"wk-form4_1720032958.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000151/wk-form4_1720032958.xml","form_type":"4"}},{"id":1473696,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-06-20T20:35:41.000Z","date":"2024-06-17","kind":"exercise","planned":true,"acquired":false,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date."}],"balance_after":38125,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001047127-24-000131","document":"wk-form4_1718915733.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000131/wk-form4_1718915733.xml","form_type":"4"}},{"id":1473695,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-06-20T20:35:41.000Z","date":"2024-06-17","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":34.82,"value":870500.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $34.59 to $35.00. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":94476,"source":{"system":"sec-edgar","filing":"0001047127-24-000131","document":"wk-form4_1718915733.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000131/wk-form4_1718915733.xml","form_type":"4"}},{"id":1473694,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-06-20T20:35:41.000Z","date":"2024-06-17","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":14.17,"value":212550.0,"ownership":{"direct":true},"balance_after":119476,"source":{"system":"sec-edgar","filing":"0001047127-24-000131","document":"wk-form4_1718915733.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000131/wk-form4_1718915733.xml","form_type":"4"}},{"id":1512214,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-05-17T22:03:15.000Z","date":"2024-05-15","kind":"exercise","planned":true,"acquired":false,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date."}],"balance_after":53125,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001047127-24-000124","document":"wk-form4_1715983384.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000124/wk-form4_1715983384.xml","form_type":"4"}},{"id":1512213,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-17T22:03:15.000Z","date":"2024-05-15","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":33.37,"value":834250.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $33.045 to $33.73. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":104476,"source":{"system":"sec-edgar","filing":"0001047127-24-000124","document":"wk-form4_1715983384.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000124/wk-form4_1715983384.xml","form_type":"4"}},{"id":1512212,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-05-17T22:03:15.000Z","date":"2024-05-15","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":14.17,"value":212550.0,"ownership":{"direct":true},"balance_after":129476,"source":{"system":"sec-edgar","filing":"0001047127-24-000124","document":"wk-form4_1715983384.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000124/wk-form4_1715983384.xml","form_type":"4"}},{"id":1539358,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-04-18T21:12:00.000Z","date":"2024-04-16","kind":"exercise","planned":true,"acquired":false,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date."}],"balance_after":68125,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001047127-24-000085","document":"wk-form4_1713474709.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000085/wk-form4_1713474709.xml","form_type":"4"}},{"id":1539357,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-04-18T21:12:00.000Z","date":"2024-04-16","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":31.17,"value":779250.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.80 to $31.51. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":114476,"source":{"system":"sec-edgar","filing":"0001047127-24-000085","document":"wk-form4_1713474709.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000085/wk-form4_1713474709.xml","form_type":"4"}},{"id":1539356,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-04-18T21:12:00.000Z","date":"2024-04-16","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":14.17,"value":212550.0,"ownership":{"direct":true},"balance_after":139476,"source":{"system":"sec-edgar","filing":"0001047127-24-000085","document":"wk-form4_1713474709.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000085/wk-form4_1713474709.xml","form_type":"4"}},{"id":1570132,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-03-19T21:46:09.000Z","date":"2024-03-15","kind":"exercise","planned":true,"acquired":false,"shares":15000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date."}],"balance_after":83125,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":15000},"source":{"system":"sec-edgar","filing":"0001047127-24-000065","document":"wk-form4_1710884757.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000065/wk-form4_1710884757.xml","form_type":"4"}},{"id":1570131,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-03-19T21:46:09.000Z","date":"2024-03-15","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":31.23,"value":780750.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $30.92 to $31.62. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":124476,"source":{"system":"sec-edgar","filing":"0001047127-24-000065","document":"wk-form4_1710884757.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000065/wk-form4_1710884757.xml","form_type":"4"}},{"id":1570130,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-03-19T21:46:09.000Z","date":"2024-03-15","kind":"exercise","planned":true,"acquired":true,"shares":15000,"price":14.17,"value":212550.0,"ownership":{"direct":true},"balance_after":149476,"source":{"system":"sec-edgar","filing":"0001047127-24-000065","document":"wk-form4_1710884757.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000065/wk-form4_1710884757.xml","form_type":"4"}},{"id":1620211,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-23","kind":"exercise","planned":true,"acquired":false,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":21496,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":10748},"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1620210,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-22","kind":"exercise","planned":true,"acquired":false,"shares":4375,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This stock option (the \"2020 Option\") to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 (the \"2020 Option Grant Date\") and vested in equal quarterly installments over three years, such that 100% of the 2020 Option vested on the third anniversary of the 2020 Option Grant Date."}],"balance_after":98125,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":4375},"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1620209,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-22","kind":"exercise","planned":true,"acquired":false,"shares":10625,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On March 17, 2023, the Reporting Person filed a Form 4 which inadvertently reported that the Reporting Person beneficially owned 15,265 2019 Options Shares (as defined below) as of March 15, 2023, instead of 15,625.  As of February 22, 2024, the Reporting Person beneficially owned 0 2019 Option Shares."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option (the \"2019 Option\") to acquire 150,000 shares of the Issuer's common stock (the \"2019 Option Shares\") was granted on February 15, 2019 (the \"2019 Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F3","text":"On March 17, 2023, the Reporting Person filed a Form 4 which inadvertently reported that the Reporting Person beneficially owned 15,265 2019 Options Shares (as defined below) as of March 15, 2023, instead of 15,625.  As of February 22, 2024, the Reporting Person beneficially owned 0 2019 Option Shares."}],"balance_after":0,"derivative":{"exercise_price":9.48,"exercise_date":"2020-02-15","expiration_date":"2029-02-15","underlying":"Common Stock","underlying_shares":10625},"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1620208,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-23","kind":"grant","planned":true,"acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":134476,"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1620207,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-22","kind":"sale","planned":true,"acquired":false,"shares":25000,"price":30.63,"value":765750.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $30.40 to $31.00. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":123728,"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1620206,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-22","kind":"exercise","planned":true,"acquired":true,"shares":4375,"price":14.17,"value":61993.75,"ownership":{"direct":true},"balance_after":148728,"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1620205,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-02-26T23:55:22.000Z","date":"2024-02-22","kind":"exercise","planned":true,"acquired":true,"shares":10625,"price":9.48,"value":100725.0,"ownership":{"direct":true},"balance_after":144353,"source":{"system":"sec-edgar","filing":"0001047127-24-000046","document":"wk-form4_1708991681.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000046/wk-form4_1708991681.xml","form_type":"4"}},{"id":1626076,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2024-02-22T22:43:36.000Z","date":"2024-02-20","kind":"grant","planned":false,"acquired":true,"shares":282352,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest over three years, with 40% of the RSUs vesting on each of the first anniversary and the second anniversary of the Grant Date, and 20% vesting on the third anniversary of the Grant Date,, such that 100% will be vested on the third anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest over three years, with 40% of the RSUs vesting on each of the first anniversary and the second anniversary of the Grant Date, and 20% vesting on the third anniversary of the Grant Date,, such that 100% will be vested on the third anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest over three years, with 40% of the RSUs vesting on each of the first anniversary and the second anniversary of the Grant Date, and 20% vesting on the third anniversary of the Grant Date,, such that 100% will be vested on the third anniversary of the Grant Date."}],"balance_after":282352,"derivative":{"underlying":"Common Stock","underlying_shares":282352},"source":{"system":"sec-edgar","filing":"0001047127-24-000040","document":"wk-form4_1708641785.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000040/wk-form4_1708641785.xml","form_type":"4"}},{"id":1630187,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2024-02-21T22:08:34.000Z","date":"2024-02-16","kind":"exercise","planned":false,"acquired":false,"shares":13920,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On the Grant Date, the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On the Grant Date, the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On the Grant Date, the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":41759,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":13920},"source":{"system":"sec-edgar","filing":"0001047127-24-000024","document":"wk-form4_1708553299.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000024/wk-form4_1708553299.xml","form_type":"4"}},{"id":1630186,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2024-02-21T22:08:34.000Z","date":"2024-02-16","kind":"exercise","planned":false,"acquired":true,"shares":13920,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":133728,"source":{"system":"sec-edgar","filing":"0001047127-24-000024","document":"wk-form4_1708553299.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000024/wk-form4_1708553299.xml","form_type":"4"}},{"id":1707865,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2023-12-18T21:46:14.000Z","date":"2023-12-14","kind":"grant","planned":false,"acquired":true,"shares":43857,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On December 14, 2023 (the \"RSU Grant Date\"), the Reporting Person was granted 43,857 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement.  The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in full on July 1, 2024."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On December 14, 2023 (the \"RSU Grant Date\"), the Reporting Person was granted 43,857 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement.  The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in full on July 1, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On December 14, 2023 (the \"RSU Grant Date\"), the Reporting Person was granted 43,857 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement.  The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in full on July 1, 2024."}],"balance_after":43857,"derivative":{"underlying":"Common Stock","underlying_shares":43857},"source":{"system":"sec-edgar","filing":"0001047127-23-000049","document":"wk-form4_1702935962.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712723000049/wk-form4_1702935962.xml","form_type":"4"}},{"id":1917483,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-04-19T21:23:22.000Z","date":"2023-04-17","kind":"exercise","planned":false,"acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option (the \"2020 Option\") to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 (the \"2020 Option Grant Date\") and will vest in equal quarterly installments over three years, such that 100% of the 2020 Option will be vested on the third anniversary of the 2020 Option Grant Date."}],"balance_after":102500,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-23-024871","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123024871/doc4.xml","form_type":"4"}},{"id":1917482,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-04-19T21:23:22.000Z","date":"2023-04-17","kind":"exercise","planned":false,"acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option (the \"2019 Option\") to acquire 150,000 shares of the Issuer's common stock (the \"2019 Option Shares\") was granted on February 15, 2019 (the \"2019 Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date."}],"balance_after":10265,"derivative":{"exercise_price":9.48,"exercise_date":"2020-02-15","expiration_date":"2029-02-15","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001209191-23-024871","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123024871/doc4.xml","form_type":"4"}},{"id":1917481,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-04-19T21:23:22.000Z","date":"2023-04-17","kind":"sale","planned":false,"acquired":false,"shares":30000,"price":23.92,"value":717600.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. These shares were sold in multiple transactions at prices ranging from $23.53 to $24.11. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":119808,"source":{"system":"sec-edgar","filing":"0001209191-23-024871","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123024871/doc4.xml","form_type":"4"}},{"id":1917480,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-04-19T21:23:22.000Z","date":"2023-04-17","kind":"exercise","planned":false,"acquired":true,"shares":10000,"price":14.17,"value":141700.0,"ownership":{"direct":true},"balance_after":149808,"source":{"system":"sec-edgar","filing":"0001209191-23-024871","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123024871/doc4.xml","form_type":"4"}},{"id":1917479,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-04-19T21:23:22.000Z","date":"2023-04-17","kind":"exercise","planned":false,"acquired":true,"shares":5000,"price":9.48,"value":47400.0,"ownership":{"direct":true},"balance_after":139808,"source":{"system":"sec-edgar","filing":"0001209191-23-024871","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123024871/doc4.xml","form_type":"4"}},{"id":1947986,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-03-17T21:06:52.000Z","date":"2023-03-15","kind":"exercise","acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option (the \"2020 Option\") to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 (the \"2020 Option Grant Date\") and will vest in equal quarterly installments over three years, such that 100% of the 2020 Option will be vested on the third anniversary of the 2020 Option Grant Date."}],"balance_after":112500,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-23-019756","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019756/doc4.xml","form_type":"4"}},{"id":1947985,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-03-17T21:06:52.000Z","date":"2023-03-15","kind":"exercise","acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option (the \"2019 Option\") to acquire 150,000 shares of the Issuer's common stock (the \"2019 Option Shares\") was granted on February 15, 2019 (the \"2019 Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date."}],"balance_after":15265,"derivative":{"exercise_price":9.48,"exercise_date":"2020-02-15","expiration_date":"2029-02-15","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001209191-23-019756","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019756/doc4.xml","form_type":"4"}},{"id":1947984,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-17T21:06:52.000Z","date":"2023-03-15","kind":"sale","acquired":false,"shares":30000,"price":24.19,"value":725700.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 26, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $23.99 to $24.71. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the \"Issuer\"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4."}],"balance_after":134808,"source":{"system":"sec-edgar","filing":"0001209191-23-019756","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019756/doc4.xml","form_type":"4"}},{"id":1947983,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-17T21:06:52.000Z","date":"2023-03-15","kind":"exercise","acquired":true,"shares":10000,"price":14.17,"value":141700.0,"ownership":{"direct":true},"balance_after":164808,"source":{"system":"sec-edgar","filing":"0001209191-23-019756","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019756/doc4.xml","form_type":"4"}},{"id":1947982,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-17T21:06:52.000Z","date":"2023-03-15","kind":"exercise","acquired":true,"shares":5000,"price":9.48,"value":47400.0,"ownership":{"direct":true},"balance_after":154808,"source":{"system":"sec-edgar","filing":"0001209191-23-019756","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019756/doc4.xml","form_type":"4"}},{"id":1947981,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-17T21:04:25.000Z","date":"2023-02-24","kind":"tax_withholding","acquired":false,"shares":940,"price":25.27,"value":23753.8,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This amendment is being filed to correct the number of shares beneficially owned by the Reporting Person as reported in the original Form 4 filed with the Securities and Exchange Commission on February 24, 2023 (the \"Original Form 4\").  The Original Form 4 inadvertently overstated the Reporting Person's beneficial ownership in Column 5 of Table I by 30,000 shares."}],"balance_after":149808,"source":{"system":"sec-edgar","filing":"0001209191-23-019746","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019746/doc4a.xml","form_type":"4/A","original_submission_date":"2023-02-24"}},{"id":1947980,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-03-17T21:04:25.000Z","date":"2023-02-24","kind":"exercise","acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"This amendment is being filed to correct the number of shares beneficially owned by the Reporting Person as reported in the original Form 4 filed with the Securities and Exchange Commission on February 24, 2023 (the \"Original Form 4\").  The Original Form 4 inadvertently overstated the Reporting Person's beneficial ownership in Column 5 of Table I by 30,000 shares."}],"balance_after":150748,"source":{"system":"sec-edgar","filing":"0001209191-23-019746","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123019746/doc4a.xml","form_type":"4/A","original_submission_date":"2023-02-24"}},{"id":1993943,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2023-02-25T00:59:40.000Z","date":"2023-02-24","kind":"exercise","acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":32244,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":10748},"source":{"system":"sec-edgar","filing":"0001209191-23-012976","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012976/doc4.xml","form_type":"4"}},{"id":1993942,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-02-25T00:59:40.000Z","date":"2023-02-24","kind":"tax_withholding","acquired":false,"shares":940,"price":25.27,"value":23753.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on the RSU Grant Date. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":179808,"source":{"system":"sec-edgar","filing":"0001209191-23-012976","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012976/doc4.xml","form_type":"4"}},{"id":1993941,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Common Stock","published_at":"2023-02-25T00:59:40.000Z","date":"2023-02-24","kind":"exercise","acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 42,992 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":180748,"source":{"system":"sec-edgar","filing":"0001209191-23-012976","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012976/doc4.xml","form_type":"4"}},{"id":2008572,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Restricted Stock Units","published_at":"2023-02-17T22:07:19.000Z","date":"2023-02-16","kind":"grant","acquired":true,"shares":55679,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":55679,"derivative":{"underlying":"Common Stock","underlying_shares":55679},"source":{"system":"sec-edgar","filing":"0001209191-23-010756","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010756/doc4.xml","form_type":"4"}},{"id":2008571,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-02-17T22:07:19.000Z","date":"2023-02-15","kind":"exercise","acquired":false,"shares":10000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option (the \"2020 Option\") to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 (the \"2020 Option Grant Date\") and will vest in equal quarterly installments over three years, such that 100% of the 2020 Option will be vested on the third anniversary of the 2020 Option Grant Date."}],"balance_after":122500,"derivative":{"exercise_price":14.17,"exercise_date":"2020-10-30","expiration_date":"2030-07-30","underlying":"Common Stock","underlying_shares":10000},"source":{"system":"sec-edgar","filing":"0001209191-23-010756","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010756/doc4.xml","form_type":"4"}},{"id":2008570,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":25544,"kind":"person","name":"Rutten Guillaume Marie Jean","position":1,"cik":"0001596796","reported_name":"Rutten Guillaume Marie Jean","relationship":{"director":true,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"President and CEO"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-02-17T22:07:19.000Z","date":"2023-02-15","kind":"exercise","acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option (the \"2019 Option\") to acquire 150,000 shares of the Issuer's common stock (the \"2019 Option Shares\") was granted on February 15, 2019 (the \"2019 Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date."}],"balance_after":20625,"derivative":{"exercise_price":9.48,"exercise_date":"2020-02-15","expiration_date":"2029-02-15","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001209191-23-010756","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010756/doc4.xml","form_type":"4"}}],"next_cursor":"2023-02-17T22:07:19.000000Z,2008570"}