{"transactions":[{"id":4626242,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Restricted Stock Units","published_at":"2026-09-24T20:45:09.000Z","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":"F4","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 the Issuer granted to the\nReporting 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":"F4","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 the Issuer granted to the\nReporting 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":"F4","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 the Issuer granted to the\nReporting 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":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":3.9978},"source":{"system":"sec-edgar","filing":"0001628280-26-063436","document":"wk-form4_1790282705.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1158922/000162828026063436/wk-form4_1790282705.xml","form_type":"4"}},{"id":726874,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Restricted Stock Units","published_at":"2026-06-25T20:50:52.000Z","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":"F4","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 the 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":"F4","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 the 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":"F4","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 the 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":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2.5166},"source":{"system":"sec-edgar","filing":"0001628280-26-045577","document":"wk-form4_1782420649.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026045577/wk-form4_1782420649.xml","form_type":"4"}},{"id":740442,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2026-06-12T20:36:07.000Z","date":"2026-06-12","kind":"grant","planned":false,"acquired":true,"shares":9893,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. On May 13, 2026, the RSUs, plus an additional 104 dividend equivalent units (\"DEUs\"), which each represented an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, vested. On June 12, 2026, the RSUs and DEUs converted into common stock of the Issuer on a one-for-one basis."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units (\"RSUs\") pursuant to the Amkor Technology, Inc. (the \"Issuer\") 2021 Equity Incentive Plan, as amended, and the applicable award agreement. On May 13, 2026, the RSUs, plus an additional 104 dividend equivalent units (\"DEUs\"), which each represented an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, vested. On June 12, 2026, the RSUs and DEUs converted into common stock of the Issuer on a one-for-one basis."}],"balance_after":6120387,"source":{"system":"sec-edgar","filing":"0001628280-26-042891","document":"wk-form4_1781296564.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026042891/wk-form4_1781296564.xml","form_type":"4"}},{"id":777611,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2026-05-15T20:44:42.000Z","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":"F5","text":"Represents shares of common stock underlying RSUs granted on May 13, 2026 (the \"Grant Date\") pursuant to the Plan (the \"2026 RSUs\"). Subject to the terms and conditions of the applicable award\nagreement, the 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\nfirst annual meeting of stockholders immediately following the Grant Date. The 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":"F5","text":"Represents shares of common stock underlying RSUs granted on May 13, 2026 (the \"Grant Date\") pursuant to the Plan (the \"2026 RSUs\"). Subject to the terms and conditions of the applicable award\nagreement, the 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\nfirst annual meeting of stockholders immediately following the Grant Date. The 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":"F5","text":"Represents shares of common stock underlying RSUs granted on May 13, 2026 (the \"Grant Date\") pursuant to the Plan (the \"2026 RSUs\"). Subject to the terms and conditions of the applicable award\nagreement, the 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\nfirst annual meeting of stockholders immediately following the Grant Date. The 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":2613,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2613},"source":{"system":"sec-edgar","filing":"0001628280-26-035684","document":"wk-form4_1778877879.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026035684/wk-form4_1778877879.xml","form_type":"4"}},{"id":777610,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2026-05-15T20:44:42.000Z","date":"2026-05-13","kind":"exercise","planned":false,"acquired":false,"shares":9893.0573,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"On May 15, 2025, the Reporting Person was granted 9,789 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 \"2025 RSUs\"). In connection with the vesting of the 2025 RSUs on May 13, 2026 (the \"Vesting Date\"): (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, will convert into common stock of the Issuer on a one-for-one basis within 30 days of the Vesting Date or will otherwise be settled in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On May 15, 2025, the Reporting Person was granted 9,789 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 \"2025 RSUs\"). In connection with the vesting of the 2025 RSUs on May 13, 2026 (the \"Vesting Date\"): (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, will convert into common stock of the Issuer on a one-for-one basis within 30 days of the Vesting Date or will otherwise be settled in cash."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On May 15, 2025, the Reporting Person was granted 9,789 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 \"2025 RSUs\"). In connection with the vesting of the 2025 RSUs on May 13, 2026 (the \"Vesting Date\"): (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, will convert into common stock of the Issuer on a one-for-one basis within 30 days of the Vesting Date or will otherwise be settled in cash."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":9893.0573},"source":{"system":"sec-edgar","filing":"0001628280-26-035684","document":"wk-form4_1778877879.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026035684/wk-form4_1778877879.xml","form_type":"4"}},{"id":811776,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Director stock option (right to buy)","published_at":"2026-04-09T21:04:39.000Z","date":"2026-04-07","kind":"exercise","planned":false,"acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 4, 2016 and vested in full on May 2, 2017."}],"balance_after":0,"derivative":{"exercise_price":5.66,"exercise_date":"2017-05-02","expiration_date":"2026-05-04","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001628280-26-024522","document":"wk-form4_1775768676.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026024522/wk-form4_1775768676.xml","form_type":"4"}},{"id":811775,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2026-04-09T21:04:39.000Z","date":"2026-04-07","kind":"exercise","planned":false,"acquired":true,"shares":20000,"price":5.66,"value":113200.0,"ownership":{"direct":true},"balance_after":6110494,"source":{"system":"sec-edgar","filing":"0001628280-26-024522","document":"wk-form4_1775768676.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026024522/wk-form4_1775768676.xml","form_type":"4"}},{"id":820839,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2026-04-02T22:55:51.000Z","date":"2026-03-31","kind":"grant","planned":false,"acquired":true,"shares":18.1563,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on March 31, 2026 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 15, 2025. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on March 31, 2026 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 15, 2025. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on March 31, 2026 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":9893.0573,"derivative":{"underlying":"Common Stock","underlying_shares":18.1563},"source":{"system":"sec-edgar","filing":"0001628280-26-023393","document":"wk-form4_1775170548.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026023393/wk-form4_1775170548.xml","form_type":"4"}},{"id":957519,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-12-30T21:39:55.000Z","date":"2025-12-26","kind":"gift","planned":false,"acquired":false,"shares":725000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 26, 2025, the 2023 Grantor Retained Annuity Trust dated 9/15/2023 distributed 725,000 shares of common stock of Amkor, Inc. (the \"Issuer\") to the Susan Y. Kim 2023 Family Distribution Trust. The Reporting Person is the trustee of the 2023 Grantor Retained Annuity Trust Dated 9/15/2023. John T. Kim and James J. Kim are co-trustees of the Susan Y. Kim 2023 Family Distribution Trust."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,713,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,912,594 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,124,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock , and (vi) a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":1124000,"source":{"system":"sec-edgar","filing":"0001158922-25-000021","document":"wk-form4_1767130790.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000021/wk-form4_1767130790.xml","form_type":"4"}},{"id":960050,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Restricted Stock Units","published_at":"2025-12-24T00:01:38.000Z","date":"2025-12-23","kind":"grant","planned":false,"acquired":true,"shares":20.0093,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 15, 2025. 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":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 15, 2025. 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":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":9874.901,"derivative":{"underlying":"Common Stock","underlying_shares":20.0093},"source":{"system":"sec-edgar","filing":"0001158922-25-000019","document":"wk-form4_1766534494.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000019/wk-form4_1766534494.xml","form_type":"4"}},{"id":960049,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-12-24T00:01:38.000Z","date":"2025-12-19","kind":"gift","planned":false,"acquired":true,"shares":2538000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,713,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,912,594 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,849,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock , and (vi) a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On December 19, 2025, Agnes C. Kim made a distribution of 2,538,000 shares of common stock of the Issuer to the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim. The Reporting Person is the sole trustee of the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim."}],"balance_after":2538000,"source":{"system":"sec-edgar","filing":"0001158922-25-000019","document":"wk-form4_1766534494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000019/wk-form4_1766534494.xml","form_type":"4"}},{"id":960048,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-12-24T00:01:38.000Z","date":"2025-12-19","kind":"gift","planned":false,"acquired":true,"shares":3244594,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"2025 Grantor Retained Annuity Trust No. 1 of James J. Kim"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On December 19, 2025,  James J. Kim made a distribution of 3,244,594 shares of common stock of the Amkor Technology, Inc. (the \"Issuer\") to the 2025 Grantor Retained Annuity Trust No. 1 of James J. Kim. The Reporting Person is the sole trustee of the 2025 Grantor Retained Annuity Trust No.1 of James J. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,713,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,912,594 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,849,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock , and (vi) a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":3244594,"source":{"system":"sec-edgar","filing":"0001158922-25-000019","document":"wk-form4_1766534494.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000019/wk-form4_1766534494.xml","form_type":"4"}},{"id":978056,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-12-08T22:52:27.000Z","date":"2025-12-04","kind":"gift","planned":false,"acquired":true,"shares":758000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On December 4, 2025, the Susan Y. Kim 2023 Grantor Retained Annuity Trust dated 9/15/2023 distributed 758,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person as a gift. Because the Reporting Person is the annuitant and sole trustee of the trust, such distribution was a mere change in the form of ownership from indirect to direct and is being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":6090494,"source":{"system":"sec-edgar","filing":"0001158922-25-000017","document":"wk-form4_1765234344.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000017/wk-form4_1765234344.xml","form_type":"4"}},{"id":978055,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-12-08T22:52:27.000Z","date":"2025-12-04","kind":"gift","planned":false,"acquired":false,"shares":758000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On December 4, 2025, the Susan Y. Kim 2023 Grantor Retained Annuity Trust dated 9/15/2023 distributed 758,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person as a gift. Because the Reporting Person is the annuitant and sole trustee of the trust, such distribution was a mere change in the form of ownership from indirect to direct and is being voluntarily reported by the Reporting Person on this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,713,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,849,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":1849000,"source":{"system":"sec-edgar","filing":"0001158922-25-000017","document":"wk-form4_1765234344.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000017/wk-form4_1765234344.xml","form_type":"4"}},{"id":990521,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:30.000Z","date":"2025-11-20","kind":"gift","planned":false,"acquired":false,"shares":705000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024\ndistributed 705,000 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the the Agnes C. Kim Revocable Trust, of which Agnes C. Kim is the sole settlor, sole beneficiary, and sole trustee. Susan Y. Kim is the sole trustee of the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,453,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,607,00 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":3713610,"source":{"system":"sec-edgar","filing":"0001158922-25-000015","document":"wk-form4_1764035907.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000015/wk-form4_1764035907.xml","form_type":"4"}},{"id":990520,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:30.000Z","date":"2025-11-20","kind":"grant","planned":false,"acquired":true,"shares":965000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On November 20, 2025, the 2024 Grantor Retained Annuity Trust of James J. Kim 8/5/2024 distributed 965,000 shares of the Common Stock of the Issuer to the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18. The Reporting Person is the trustee of the 2024 Grantor Retained Annuity Trust of James J. Kim 8/5/2024. The Reporting Person and James J. Kim are co-trustees of the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,453,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,607,00 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":4418610,"source":{"system":"sec-edgar","filing":"0001158922-25-000015","document":"wk-form4_1764035907.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000015/wk-form4_1764035907.xml","form_type":"4"}},{"id":990519,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:30.000Z","date":"2025-11-20","kind":"gift","planned":false,"acquired":false,"shares":965000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On November 20, 2025, the 2024 Grantor Retained Annuity Trust of James J. Kim 8/5/2024 distributed 965,000 shares of the Common Stock of the Issuer to the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18. The Reporting Person is the trustee of the 2024 Grantor Retained Annuity Trust of James J. Kim 8/5/2024. The Reporting Person and James J. Kim are co-trustees of the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,453,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,607,00 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":3453610,"source":{"system":"sec-edgar","filing":"0001158922-25-000015","document":"wk-form4_1764035907.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000015/wk-form4_1764035907.xml","form_type":"4"}},{"id":990518,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:30.000Z","date":"2025-11-20","kind":"gift","planned":false,"acquired":false,"shares":876000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024\ndistributed 876,000 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Reporting Person. The Reporting Person is the sole trustee of the 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024. Because the Reporting Person is the annuitant and sole trustee of the 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 3,453,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,607,00 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":2607000,"source":{"system":"sec-edgar","filing":"0001158922-25-000015","document":"wk-form4_1764035907.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000015/wk-form4_1764035907.xml","form_type":"4"}},{"id":990517,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:30.000Z","date":"2025-11-20","kind":"gift","planned":false,"acquired":true,"shares":876000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024\ndistributed 876,000 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Reporting Person. The Reporting Person is the sole trustee of the 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024. Because the Reporting Person is the annuitant and sole trustee of the 2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":5332494,"source":{"system":"sec-edgar","filing":"0001158922-25-000015","document":"wk-form4_1764035907.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000015/wk-form4_1764035907.xml","form_type":"4"}},{"id":1032510,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Restricted Stock Units","published_at":"2025-09-25T20:46:36.000Z","date":"2025-09-23","kind":"grant","planned":false,"acquired":true,"shares":27.3648,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 15, 2025. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 15, 2025. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 23, 2025 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the\n\"Issuer\") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":9854.8917,"derivative":{"underlying":"Common Stock","underlying_shares":27.3648},"source":{"system":"sec-edgar","filing":"0001628280-25-042831","document":"wk-form4_1758833193.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828025042831/wk-form4_1758833193.xml","form_type":"4"}},{"id":1075173,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"purchase","planned":false,"acquired":true,"shares":441589,"price":21.85,"value":9648719.65,"ownership":{"direct":false,"nature":"By Sujoda Investments, LP"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F8","text":"On August 1, 2025, James J. Kim distributed 441,589 shares of the Common Stock of the Issuer to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F9","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"(Continued from Footnote 5) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":3789479,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1075172,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":false,"shares":280001,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,001 shares of the Common Stock of the Issuer to John T. Kim and 280,000 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,001 shares of the Common Stock of the Issuer to John T. Kim and 280,000 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"(Continued from Footnote 5) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1075171,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":false,"shares":280000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On August 1, 2025 the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,000 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,001 shares of the Common Stock of the Issuer to John T. Kim and 280,000 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"(Continued from Footnote 5) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":280001,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1075170,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":false,"shares":438002,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of the Issuer to John T. Kim and 438,002 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of the Issuer to John T. Kim and 438,002 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"(Continued from Footnote 5) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1075169,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":false,"shares":438002,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 1, 2025 the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of the Issuer to John T. Kim and 438,002 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"(Continued from Footnote 5) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":438002,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1075168,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":true,"shares":280000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On August 1, 2025 the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,000 shares of the Common Stock of the Issuer to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"On August 1, 2025 the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,000 shares of the Common Stock of the Issuer to the Reporting Person."}],"balance_after":4456494,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1075167,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2025-08-05T23:09:10.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":true,"shares":438002,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 1, 2025 the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":4176494,"source":{"system":"sec-edgar","filing":"0001158922-25-000013","document":"wk-form4_1754435347.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000013/wk-form4_1754435347.xml","form_type":"4"}},{"id":1077810,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-08-01T20:42:14.000Z","date":"2025-07-30","kind":"gift","planned":false,"acquired":false,"shares":1738000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On July 30, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 1,738,000 shares of the Issuer's Common Stock to Agnes C. Kim. The Reporting Person is the sole trustee of the Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\"); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 5,236,005 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,347,890 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":560001,"source":{"system":"sec-edgar","filing":"0001158922-25-000011","document":"wk-form4_1754080916.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000011/wk-form4_1754080916.xml","form_type":"4"}},{"id":1077809,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-08-01T20:42:14.000Z","date":"2025-07-30","kind":"gift","planned":false,"acquired":false,"shares":2711000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 30, 2025  the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 2,711,000 of the Issuer's Common Stock to James J. Kim. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\"); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 5,236,005 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,347,890 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":876004,"source":{"system":"sec-edgar","filing":"0001158922-25-000011","document":"wk-form4_1754080916.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000011/wk-form4_1754080916.xml","form_type":"4"}},{"id":1100545,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2025-06-27T21:47:23.000Z","date":"2025-06-25","kind":"grant","planned":false,"acquired":true,"shares":38.5269,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 15, 2025. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 15, 2025. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":9827.5269,"derivative":{"underlying":"Common Stock","underlying_shares":38.5269},"source":{"system":"sec-edgar","filing":"0001047127-25-000137","document":"wk-form4_1751060835.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000137/wk-form4_1751060835.xml","form_type":"4"}},{"id":1145951,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2025-05-16T20:31:04.000Z","date":"2025-05-15","kind":"grant","planned":false,"acquired":true,"shares":9789,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Represents shares of common stock underlying RSUs granted on May 15, 2025 (the \"Grant Date\") pursuant to the Plan (the \"2025 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the 2025 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 2025 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":"F6","text":"Represents shares of common stock underlying RSUs granted on May 15, 2025 (the \"Grant Date\") pursuant to the Plan (the \"2025 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the 2025 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 2025 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":"F6","text":"Represents shares of common stock underlying RSUs granted on May 15, 2025 (the \"Grant Date\") pursuant to the Plan (the \"2025 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the 2025 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 2025 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":9789,"derivative":{"underlying":"Common Stock","underlying_shares":9789},"source":{"system":"sec-edgar","filing":"0001047127-25-000104","document":"wk-form4_1747427456.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000104/wk-form4_1747427456.xml","form_type":"4"}},{"id":1145950,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2025-05-16T20:31:04.000Z","date":"2025-05-14","kind":"exercise","planned":false,"acquired":false,"shares":6017.0342,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"shares","element":"transactionShares","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":6017.0342},"source":{"system":"sec-edgar","filing":"0001047127-25-000104","document":"wk-form4_1747427456.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000104/wk-form4_1747427456.xml","form_type":"4"}},{"id":1145949,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2025-05-16T20:31:04.000Z","date":"2025-05-14","kind":"exercise","planned":false,"acquired":true,"shares":6017,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On May 14, 2024, the Reporting Person was granted 5,855 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 \"2024 RSUs\"). In connection with the vesting of the 2024 RSUs on May 14, 2025: (i) 0.0342 of the 2024 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2024 RSUs, including 162 DEUs, converted into common stock of the Issuer on a one-for-one basis."}],"balance_after":3738492,"source":{"system":"sec-edgar","filing":"0001047127-25-000104","document":"wk-form4_1747427456.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000104/wk-form4_1747427456.xml","form_type":"4"}},{"id":1177897,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2025-04-04T20:28:19.000Z","date":"2025-04-02","kind":"grant","planned":false,"acquired":true,"shares":25.9877,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on April 2, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 14, 2024. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on April 2, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 14, 2024. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on April 2, 2025 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the\nReporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":6017.0342,"derivative":{"underlying":"Common Stock","underlying_shares":25.9877},"source":{"system":"sec-edgar","filing":"0001047127-25-000080","document":"wk-form4_1743798493.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000080/wk-form4_1743798493.xml","form_type":"4"}},{"id":1243874,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-02-26T22:16:01.000Z","date":"2025-02-24","kind":"purchase","planned":false,"acquired":true,"shares":869565,"price":21.85,"value":18999995.25,"ownership":{"direct":false,"nature":"By Sujoda Investments, LP"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 24, 2025, James J. Kim distributed 869,565 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 9,685,005 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 2, a member of Sujoda Management, LLC, which indirectly owns 3,347,890 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":3347890,"source":{"system":"sec-edgar","filing":"0001158922-25-000006","document":"wk-form4_1740608153.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000006/wk-form4_1740608153.xml","form_type":"4"}},{"id":1298114,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2025-01-22T22:03:31.000Z","date":"2025-01-17","kind":"gift","planned":false,"acquired":true,"shares":274000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 17, 2025, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 (the \"JJK 2021 Trust\") distributed 274,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person and 274,000 shares of the Issuer's Common Stock to John T. Kim. The Reporting Person and James J. Kim are co-trustees of the JJK 2021 Trust."}],"balance_after":3732475,"source":{"system":"sec-edgar","filing":"0001158922-25-000004","document":"wk-form4_1737583403.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000004/wk-form4_1737583403.xml","form_type":"4"}},{"id":1298113,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2025-01-22T22:03:31.000Z","date":"2025-01-17","kind":"gift","planned":false,"acquired":false,"shares":548000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2021 GRAT dtd 12/15/21"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 17, 2025, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 (the \"JJK 2021 Trust\") distributed 274,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person and 274,000 shares of the Issuer's Common Stock to John T. Kim. The Reporting Person and James J. Kim are co-trustees of the JJK 2021 Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person's previous Form 4 filed January 10, 2025 reported a distribution of 790,019 shares of the Issuer's Common Stock from the JJK 2021 Trust to James J. Kim. The correct number of shares for that distribution was 790,097 shares."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001158922-25-000004","document":"wk-form4_1737583403.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000004/wk-form4_1737583403.xml","form_type":"4"}},{"id":1305666,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-01-10T22:21:06.000Z","date":"2025-01-07","kind":"gift","planned":false,"acquired":false,"shares":790019,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2021 GRAT dtd 12/15/21"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 7, 2025, the James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021 transferred 790,019 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim as a gift. The Reporting Person is a co-trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 10,233,083 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 5, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":548078,"source":{"system":"sec-edgar","filing":"0001158922-25-000002","document":"wk-form4_1736547658.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892225000002/wk-form4_1736547658.xml","form_type":"4"}},{"id":1322135,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2024-12-26T18:07:39.000Z","date":"2024-12-23","kind":"grant","planned":false,"acquired":true,"shares":108.7979,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on December 23, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. 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":"F6","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on December 23, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. 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":"F6","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on December 23, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":5991.0465,"derivative":{"underlying":"Common Stock","underlying_shares":108.7979},"source":{"system":"sec-edgar","filing":"0001047127-24-000237","document":"wk-form4_1735236453.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000237/wk-form4_1735236453.xml","form_type":"4"}},{"id":1322134,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-12-26T18:07:39.000Z","date":"2024-12-23","kind":"gift","planned":false,"acquired":true,"shares":1017000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 23, 2024, the Susan Y. Kim 2023 Grantor Retained Annuity Trust dated 9/15/2023 distributed 1,017,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person as a gift. Because the Reporting Person is the annuitant and sole trustee of the trust, such distribution was a mere change in the form of ownership from indirect to direct and is being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":3458475,"source":{"system":"sec-edgar","filing":"0001047127-24-000237","document":"wk-form4_1735236453.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000237/wk-form4_1735236453.xml","form_type":"4"}},{"id":1322133,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-12-26T18:07:39.000Z","date":"2024-12-23","kind":"gift","planned":false,"acquired":false,"shares":1017000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 23, 2024, the Susan Y. Kim 2023 Grantor Retained Annuity Trust dated 9/15/2023 distributed 1,017,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person as a gift. Because the Reporting Person is the annuitant and sole trustee of the trust, such distribution was a mere change in the form of ownership from indirect to direct and is being voluntarily reported by the Reporting Person on this Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 11,023,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 5, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":3483000,"source":{"system":"sec-edgar","filing":"0001047127-24-000237","document":"wk-form4_1735236453.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000237/wk-form4_1735236453.xml","form_type":"4"}},{"id":1354901,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Director stock option (right to buy)","published_at":"2024-11-22T21:33:48.000Z","date":"2024-11-21","kind":"exercise","planned":false,"acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"This stock option to acquire 20,000 shares of  the Issuer's Common Stock was granted on May 5, 2015 and vested in full on May 4, 2016."}],"balance_after":0,"derivative":{"exercise_price":6.81,"exercise_date":"2016-05-04","expiration_date":"2025-05-05","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001047127-24-000207","document":"wk-form4_1732311221.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000207/wk-form4_1732311221.xml","form_type":"4"}},{"id":1354900,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Director stock option (right to buy)","published_at":"2024-11-22T21:33:48.000Z","date":"2024-11-21","kind":"exercise","planned":false,"acquired":false,"shares":5000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This stock option to acquire 5,000 shares of the Issuer's Common Stock was granted on February 12, 2015 and vested in full on March 5, 2015."}],"balance_after":0,"derivative":{"exercise_price":8.92,"exercise_date":"2015-03-05","expiration_date":"2025-02-12","underlying":"Common Stock","underlying_shares":5000},"source":{"system":"sec-edgar","filing":"0001047127-24-000207","document":"wk-form4_1732311221.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000207/wk-form4_1732311221.xml","form_type":"4"}},{"id":1354899,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-11-22T21:33:48.000Z","date":"2024-11-21","kind":"exercise","planned":false,"acquired":true,"shares":20000,"price":6.81,"value":136200.0,"ownership":{"direct":true},"balance_after":2441475,"source":{"system":"sec-edgar","filing":"0001047127-24-000207","document":"wk-form4_1732311221.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000207/wk-form4_1732311221.xml","form_type":"4"}},{"id":1354898,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-11-22T21:33:48.000Z","date":"2024-11-21","kind":"exercise","planned":false,"acquired":true,"shares":5000,"price":8.92,"value":44600.0,"ownership":{"direct":true},"balance_after":2421475,"source":{"system":"sec-edgar","filing":"0001047127-24-000207","document":"wk-form4_1732311221.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000207/wk-form4_1732311221.xml","form_type":"4"}},{"id":1399644,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2024-09-25T21:33:00.000Z","date":"2024-09-23","kind":"grant","planned":false,"acquired":true,"shares":14.864,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. 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":"F6","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. 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":"F6","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":5882.2486,"derivative":{"underlying":"Common Stock","underlying_shares":14.864},"source":{"system":"sec-edgar","filing":"0001047127-24-000195","document":"wk-form4_1727299973.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000195/wk-form4_1727299973.xml","form_type":"4"}},{"id":1436252,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2024-08-12T21:24:56.000Z","date":"2024-08-08","kind":"gift","planned":false,"acquired":true,"shares":1600000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2024 GRAT dtd. 8/5/24"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On August 8, 2024, Agnes C. Kim transferred 1,600,000 shares of the Issuer's Common Stock to the 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 as a gift. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 11,023,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 4,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 7, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":1600000,"source":{"system":"sec-edgar","filing":"0001158922-24-000006","document":"wk-form4_1723497890.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892224000006/wk-form4_1723497890.xml","form_type":"4"}},{"id":1436251,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2024-08-12T21:24:56.000Z","date":"2024-08-08","kind":"gift","planned":false,"acquired":true,"shares":2200000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2024 GRAT dtd. 8/5/24"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 8, 2024, James J. Kim transferred 2,200,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 as a gift. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 11,023,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 4,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 7, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":2200000,"source":{"system":"sec-edgar","filing":"0001158922-24-000006","document":"wk-form4_1723497890.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892224000006/wk-form4_1723497890.xml","form_type":"4"}},{"id":1469002,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2024-06-26T21:38:51.000Z","date":"2024-06-24","kind":"grant","planned":false,"acquired":true,"shares":12.3846,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 24, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 24, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. 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":"F5","text":"Represents dividend equivalent units (\"DEUs\") accrued upon the payment of a dividend on June 24, 2024 with respect to time-vested restricted stock units (\"RSUs\") of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":5867.3846,"derivative":{"underlying":"Common Stock","underlying_shares":12.3846},"source":{"system":"sec-edgar","filing":"0001047127-24-000135","document":"wk-form4_1719437924.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000135/wk-form4_1719437924.xml","form_type":"4"}},{"id":1479587,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-06-14T22:08:03.000Z","date":"2024-06-12","kind":"gift","planned":false,"acquired":false,"shares":980000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On June 12, 2024, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 980,000 shares of the Issuer's Common Stock to Agnes C. Kim. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,223,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":2298001,"source":{"system":"sec-edgar","filing":"0001158922-24-000004","document":"wk-form4_1718402866.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892224000004/wk-form4_1718402866.xml","form_type":"4"}},{"id":1479586,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-06-14T22:08:03.000Z","date":"2024-06-12","kind":"gift","planned":false,"acquired":false,"shares":1530000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On June 12, 2024, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 1,530,000 of the Issuer's Common Stock to James J. Kim. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,223,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":3587004,"source":{"system":"sec-edgar","filing":"0001158922-24-000004","document":"wk-form4_1718402866.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892224000004/wk-form4_1718402866.xml","form_type":"4"}},{"id":1514739,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2024-05-16T23:06:22.000Z","date":"2024-05-14","kind":"grant","planned":false,"acquired":true,"shares":5855,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Represents shares of Common Stock underlying RSUs granted on May 14, 2024 (the \"Grant Date\") pursuant to the Plan (the \"2024 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the 2024 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 2024 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":"F6","text":"Represents shares of Common Stock underlying RSUs granted on May 14, 2024 (the \"Grant Date\") pursuant to the Plan (the \"2024 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the 2024 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 2024 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":"F6","text":"Represents shares of Common Stock underlying RSUs granted on May 14, 2024 (the \"Grant Date\") pursuant to the Plan (the \"2024 RSUs\"). Subject to the terms and conditions of the applicable award agreement, the 2024 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 2024 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":5855,"derivative":{"underlying":"Common Stock","underlying_shares":5855},"source":{"system":"sec-edgar","filing":"0001047127-24-000119","document":"wk-form4_1715900768.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000119/wk-form4_1715900768.xml","form_type":"4"}},{"id":1514738,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2024-05-16T23:06:22.000Z","date":"2024-05-14","kind":"exercise","planned":false,"acquired":false,"shares":8571.0421,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."},{"field":"shares","element":"transactionShares","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":8571.0421},"source":{"system":"sec-edgar","filing":"0001047127-24-000119","document":"wk-form4_1715900768.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000119/wk-form4_1715900768.xml","form_type":"4"}},{"id":1514737,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2024-05-16T23:06:22.000Z","date":"2024-05-14","kind":"exercise","planned":false,"acquired":true,"shares":8571,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On May 16, 2023, the Reporting Person was granted 8,478 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 \"2023 RSUs\"). In connection with the vesting of the 2023 RSUs on May 14, 2024: (i) 0.0421 of the 2023 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2023 RSUs, including 93 DEUs, converted into Common Stock of the Issuer on a one-for-one basis."}],"balance_after":4416475,"source":{"system":"sec-edgar","filing":"0001047127-24-000119","document":"wk-form4_1715900768.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000119/wk-form4_1715900768.xml","form_type":"4"}},{"id":1550852,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Restricted Stock Units","published_at":"2024-04-03T22:05:12.000Z","date":"2024-04-01","kind":"grant","planned":false,"acquired":true,"shares":20.9884,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on April 1, 2024. 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":"F4","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on April 1, 2024. 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":"F4","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on April 1, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8571.0421,"derivative":{"underlying":"Common Stock","underlying_shares":20.9884},"source":{"system":"sec-edgar","filing":"0001047127-24-000067","document":"wk-form4_1712181900.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000067/wk-form4_1712181900.xml","form_type":"4"}},{"id":1699674,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Restricted Stock Units","published_at":"2023-12-27T21:30:19.000Z","date":"2023-12-26","kind":"grant","planned":false,"acquired":true,"shares":19.5331,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on December 26, 2023. 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":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on December 26, 2023. 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":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on December 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8550.0537,"derivative":{"underlying":"Common Stock","underlying_shares":19.5331},"source":{"system":"sec-edgar","filing":"0001209191-23-059788","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059788/doc4.xml","form_type":"4"}},{"id":1699673,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:19.000Z","date":"2023-12-26","kind":"gift","planned":false,"acquired":true,"shares":972920,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"On December 26, 2023 the ACK Trust distributed 972,920 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is sole trustee of the ACK Trust, this transaction was a mere change in the Reporting Person's form of ownership from indirect to direct."}],"balance_after":4407904,"source":{"system":"sec-edgar","filing":"0001209191-23-059788","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059788/doc4.xml","form_type":"4"}},{"id":1699672,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:19.000Z","date":"2023-12-26","kind":"gift","planned":false,"acquired":false,"shares":972920,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2020-1 GRAT dtd. 12/16/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"On December 26, 2023 the ACK Trust distributed 972,920 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is sole trustee of the ACK Trust, this transaction was a mere change in the Reporting Person's form of ownership from indirect to direct."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-059788","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059788/doc4.xml","form_type":"4"}},{"id":1699671,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:19.000Z","date":"2023-12-26","kind":"gift","planned":false,"acquired":false,"shares":972920,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2020-1 GRAT dtd. 12/16/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On December 26, 2023, the ACK Trust distributed 972,920 shares of the Issuer's Common Stock to John T. Kim. The Reporting Person is the sole trustee of the ACK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 9,733,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 7, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":972920,"source":{"system":"sec-edgar","filing":"0001209191-23-059788","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059788/doc4.xml","form_type":"4"}},{"id":1699670,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:19.000Z","date":"2023-12-22","kind":"gift","planned":false,"acquired":false,"shares":715000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2020-1 GRAT dtd. 12/16/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 22, 2023, the Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement dated 12/6/2020 (the \"ACK Trust\") distributed 715,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Agnes C. Kim. The Reporting Person is the sole trustee of the ACK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 9,733,102 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 7, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":1945840,"source":{"system":"sec-edgar","filing":"0001209191-23-059788","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059788/doc4.xml","form_type":"4"}},{"id":1702610,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-12-21T22:11:30.000Z","date":"2023-12-19","kind":"gift","planned":false,"acquired":false,"shares":529650,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2021 GRAT dtd 12/15/21"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 19, 2023, the James J. Kim 2021 Qualified Annuity Trust Dated 12/15/21 (the \"JJK Trust\") distributed 529,650 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim. The Reporting Person and James J. Kim are co-trustees of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 4,418,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 12,393,942 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,500,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (vi) as referenced in Footnote 9, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock and (vii) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":1338097,"source":{"system":"sec-edgar","filing":"0001209191-23-059462","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059462/doc4.xml","form_type":"4"}},{"id":1772792,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Restricted Stock Units","published_at":"2023-09-27T21:06:58.000Z","date":"2023-09-25","kind":"grant","planned":false,"acquired":true,"shares":28.3988,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"shares","element":"transactionShares","label":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on September 25, 2023. 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":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on September 25, 2023. 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":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F7","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on September 25, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8530.5206,"derivative":{"underlying":"Common Stock","underlying_shares":28.3988},"source":{"system":"sec-edgar","filing":"0001209191-23-050668","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123050668/doc4.xml","form_type":"4"}},{"id":1820619,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2023-07-31T22:00:15.000Z","date":"2023-07-27","kind":"gift","planned":false,"acquired":true,"shares":498232,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 27, 2023, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"JTK Trust\") transferred 498,232 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"Family Trust\"). John T. Kim and Susan Y. Kim are co-trustees of the JTK Trust and the Family Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,759,730 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 12,923,592 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,338,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 5, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":7759730,"source":{"system":"sec-edgar","filing":"0001209191-23-043876","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043876/doc4.xml","form_type":"4"}},{"id":1820618,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2023-07-31T22:00:15.000Z","date":"2023-07-27","kind":"gift","planned":false,"acquired":false,"shares":498232,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By John T. Kim 2018 GRAT dtd. 2/6/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 27, 2023, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"JTK Trust\") transferred 498,232 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"Family Trust\"). John T. Kim and Susan Y. Kim are co-trustees of the JTK Trust and the Family Trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-043876","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043876/doc4.xml","form_type":"4"}},{"id":1822340,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:39.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":true,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On July 25, 2023, the JJK Trust distributed 443,811 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is the annuitant and a trustee of the JJK Trust, such distribution was a mere change in the form of ownership from indirect to direct and hence voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":7766234,"source":{"system":"sec-edgar","filing":"0001209191-23-043570","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043570/doc4.xml","form_type":"4"}},{"id":1822339,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:39.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":false,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2020-1 GRAT dtd 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On July 25, 2023, the JJK Trust distributed 443,811 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is the annuitant and a trustee of the JJK Trust, such distribution was a mere change in the form of ownership from indirect to direct and hence voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-043570","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043570/doc4.xml","form_type":"4"}},{"id":1822338,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:39.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":false,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2020-1 GRAT dtd 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 25, 2023, the Qualified Annuity Trust under the James J. Kim 2020-1 Annuity Trust Agreement dated 4/1/20 (the \"JJK Trust\") distributed 443,811 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to John T. Kim. The Reporting Person and James J. Kim are co-trustees of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,498 shares of the Issuer's common stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 13,421,824 shares of the Issuer's common stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,338,298 shares of the Issuer's common stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's common stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's common stock and (vi) as referenced in Footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":443811,"source":{"system":"sec-edgar","filing":"0001209191-23-043570","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043570/doc4.xml","form_type":"4"}},{"id":1842916,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Restricted Stock Units","published_at":"2023-06-29T00:25:03.000Z","date":"2023-06-26","kind":"grant","planned":false,"acquired":true,"shares":24.1218,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"shares","element":"transactionShares","label":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on June 26, 2023. 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":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on June 26, 2023. 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":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F8","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of the Issuer upon the Issuer's payment of a dividend on June 26, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8502.1218,"derivative":{"underlying":"Common Stock","underlying_shares":24.1218},"source":{"system":"sec-edgar","filing":"0001209191-23-040103","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123040103/doc4.xml","form_type":"4"}},{"id":1842915,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-06-29T00:25:03.000Z","date":"2023-06-27","kind":"gift","planned":false,"acquired":false,"shares":230001,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2020-1 GRAT dtd 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On June 27, 2023, the Qualified Annuity Trust under the James J. Kim 2020-1 Annuity Trust Agreement Dated 04/01/20 (the \"JJK Trust\") distributed 230,001 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim. The Reporting Person and James J. Kim are co-trustees of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's\npecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,498 shares of the Issuer's common stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 14,309,446 shares of\nthe Issuer's common stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,338,298 shares of the Issuer's common stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's common stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's common stock and (vi) as referenced in Footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the\nIssuer's common stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":887622,"source":{"system":"sec-edgar","filing":"0001209191-23-040103","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123040103/doc4.xml","form_type":"4"}},{"id":1887272,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2023-05-19T00:07:40.000Z","date":"2023-05-16","kind":"grant","planned":false,"acquired":true,"shares":8478,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F6","text":"Represents shares of common stock underlying RSUs granted on May 16, 2023 (the \"Grant Date\") pursuant to the Plan (the \"2023 RSUs\").  Subject to the terms and conditions of the applicable award agreement, the 2023 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 2023 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":"F6","text":"Represents shares of common stock underlying RSUs granted on May 16, 2023 (the \"Grant Date\") pursuant to the Plan (the \"2023 RSUs\").  Subject to the terms and conditions of the applicable award agreement, the 2023 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 2023 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":"F6","text":"Represents shares of common stock underlying RSUs granted on May 16, 2023 (the \"Grant Date\") pursuant to the Plan (the \"2023 RSUs\").  Subject to the terms and conditions of the applicable award agreement, the 2023 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 2023 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":8478,"derivative":{"underlying":"Common Stock","underlying_shares":8478},"source":{"system":"sec-edgar","filing":"0001209191-23-030836","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123030836/doc4.xml","form_type":"4"}},{"id":1887271,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Restricted Stock Units","published_at":"2023-05-19T00:07:40.000Z","date":"2023-05-16","kind":"exercise","planned":false,"acquired":false,"shares":8809.4075,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"shares","element":"transactionShares","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":8809.4075},"source":{"system":"sec-edgar","filing":"0001209191-23-030836","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123030836/doc4.xml","form_type":"4"}},{"id":1887270,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-05-19T00:07:40.000Z","date":"2023-05-16","kind":"exercise","planned":false,"acquired":true,"shares":8809,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On May 17, 2022, the Reporting Person was granted 8,706 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 \"2022 RSUs\").  In connection with the vesting of the 2022 RSUs on May 16, 2023: (i) 0.4075 of the 2022 RSUs, which had accrued as dividend equivalent units (\"DEUs\") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2022 RSUs, including 103 DEUs, converted into common stock of the Issuer on a one-for-one basis."}],"balance_after":6982423,"source":{"system":"sec-edgar","filing":"0001209191-23-030836","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123030836/doc4.xml","form_type":"4"}},{"id":1906642,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-05-03T22:00:13.000Z","date":"2023-05-01","kind":"gift","planned":false,"acquired":true,"shares":5117004,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On May 1, 2023, James J. Kim transferred 5,117,004 shares of the Issuer's Common Stock to the 2023 Grantor Retained Annuity Trust of James J. Kim dtd. 4/26/23 as a gift. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,498 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 14,794,447 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":5117004,"source":{"system":"sec-edgar","filing":"0001209191-23-027136","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123027136/doc4.xml","form_type":"4"}},{"id":1906641,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-05-03T22:00:13.000Z","date":"2023-05-01","kind":"gift","planned":false,"acquired":true,"shares":3278001,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2023 GRAT dtd. 4/26/23"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 1, 2023, Agnes C. Kim transferred 3,278,001 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the 2023 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 4/26/23 as a gift. The Reporting Person is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,498 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 14,794,447 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":3278001,"source":{"system":"sec-edgar","filing":"0001209191-23-027136","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123027136/doc4.xml","form_type":"4"}},{"id":1942090,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (2)"}}],"security":"Restricted Stock Units","published_at":"2023-03-22T22:39:13.000Z","date":"2023-03-20","kind":"grant","planned":false,"acquired":true,"shares":26.1076,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on March 20, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on March 20, 2023. 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 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on March 20, 2023. 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 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on March 20, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on March 20, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8809.4075,"derivative":{"underlying":"Common Stock","underlying_shares":26.1076},"source":{"system":"sec-edgar","filing":"0001209191-23-020615","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123020615/doc4.xml","form_type":"4"}},{"id":1993897,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2023-02-25T00:11:37.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,468 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 9, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim, Settlor, FBO Jason Lee Kim dated 11/17/03 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and John T. Kim are co-trustees of such trust."}],"balance_after":7261498,"source":{"system":"sec-edgar","filing":"0001209191-23-012916","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012916/doc4.xml","form_type":"4"}},{"id":1993896,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2023-02-25T00:11:37.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,468 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 9, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and John T. Kim are co-trustees of such trust."}],"balance_after":7645498,"source":{"system":"sec-edgar","filing":"0001209191-23-012916","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012916/doc4.xml","form_type":"4"}},{"id":1993895,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2023-02-25T00:11:37.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,468 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 9, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and John T. Kim are co-trustees of such trust."}],"balance_after":8029498,"source":{"system":"sec-edgar","filing":"0001209191-23-012916","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012916/doc4.xml","form_type":"4"}},{"id":1993894,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2023-02-25T00:11:37.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,468 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 9, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and John T. Kim are co-trustees of such trust."}],"balance_after":8413498,"source":{"system":"sec-edgar","filing":"0001209191-23-012916","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012916/doc4.xml","form_type":"4"}},{"id":1993893,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (10)"}}],"security":"Common Stock","published_at":"2023-02-25T00:11:37.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (excl. GRATs)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92 transferred 384,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and John T. Kim are co-trustees of such trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 7,261,468 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"(Continued from Footnote 3) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 9, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":8797498,"source":{"system":"sec-edgar","filing":"0001209191-23-012916","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012916/doc4.xml","form_type":"4"}},{"id":2011726,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-02-16T17:54:50.000Z","date":"2023-02-09","kind":"gift","acquired":false,"shares":667225,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim 2020-1 GRAT dtd 12/16/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On February 9, 2023, the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A dated 12/16/20 (the \"ACK Trust\") distributed 667,225 shares of the Common Stock of the Issuer to Agnes C. Kim. The Reporting Person is the sole trustee of the ACK Trust and the daughter of Agnes C. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":2660840,"source":{"system":"sec-edgar","filing":"0001209191-23-009975","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009975/doc4.xml","form_type":"4"}},{"id":2011725,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-02-16T17:54:50.000Z","date":"2023-02-09","kind":"gift","acquired":false,"shares":485600,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2021 GRAT dtd 12/15/21"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 9, 2023, the James J. Kim 2021 Qualified Annuity Trust Dated 12/15/21 (the \"JJK Trust\") distributed 485,600 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim. The Reporting Person is a trustee of the JJK Trust and the daughter of James J. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of GRATs for the benefit of members of her immediate family which own 6,399,442 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 6, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":1867747,"source":{"system":"sec-edgar","filing":"0001209191-23-009975","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009975/doc4.xml","form_type":"4"}},{"id":2075138,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (2)"}}],"security":"Restricted Stock Units","published_at":"2022-12-29T22:27:35.000Z","date":"2022-12-27","kind":"grant","acquired":true,"shares":26.7602,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on December 27, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on December 27, 2022. 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 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on December 27, 2022. 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 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on December 27, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on December 27, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8783.2999,"derivative":{"underlying":"Common Stock","underlying_shares":26.7602},"source":{"system":"sec-edgar","filing":"0001209191-22-062932","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062932/doc4.xml","form_type":"4"}},{"id":2082335,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(9)"}}],"security":"Common Stock","published_at":"2022-12-19T20:43:02.000Z","date":"2022-12-06","kind":"gift","acquired":true,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On December 6, 2022, the Trust distributed 1,051,880 shares of the Issuer's Common Stock to the Reporting Person, a remainder beneficiary."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On December 1, 2022, the Qualified Annuity Trust under the Susan Y. Kim Irrevocable Trust Agreement dated 8/29/18 distributed 116,500 shares of the Issuer's Common stock to the Reporting Person.  Because the Reporting Person is the annuitant and a trustee of such trust, such distribution was a mere change in the form of ownership from direct to indirect and hence was not reported by the Reporting Person on a Form 4."}],"balance_after":6973614,"source":{"system":"sec-edgar","filing":"0000899243-22-038970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038970/doc4.xml","form_type":"4"}},{"id":2082334,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(9)"}}],"security":"Common Stock","published_at":"2022-12-19T20:43:02.000Z","date":"2022-12-06","kind":"gift","acquired":false,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2019-1 GRAT dtd 9/10/19"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On December 6, 2022, the Trust distributed 1,051,880 shares of the Issuer's Common Stock to the Reporting Person, a remainder beneficiary."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-22-038970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038970/doc4.xml","form_type":"4"}},{"id":2082333,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(9)"}}],"security":"Common Stock","published_at":"2022-12-19T20:43:02.000Z","date":"2022-12-06","kind":"gift","acquired":false,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2019-1 GRAT dtd 9/10/19"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On December 6, 2022, the Trust distributed 1,051,880 shares of the Issuer's Common Stock to John T. Kim, a remainder beneficiary.  The Reporting Person is a trustee of the Trust and the sister of John T. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of grantor retained annuity trusts for the benefit of members of her immediate family which own 7,552,267 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"(Continued from Footnote 6) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 5, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock.  Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares.  The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":1051880,"source":{"system":"sec-edgar","filing":"0000899243-22-038970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038970/doc4.xml","form_type":"4"}},{"id":2082332,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(9)"}}],"security":"Common Stock","published_at":"2022-12-19T20:43:02.000Z","date":"2022-12-01","kind":"gift","acquired":false,"shares":572151,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim 2019-1 GRAT dtd 9/10/19"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 1, 2022, the James J. Kim 2019-1 Qualified Annuity Trust U/A dated 9/10/19 (the \"Trust\"), of which James J. Kim is the sole annuitant, distributed 572,151 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim.  The Reporting Person is a trustee of the Trust and the daughter of James J. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of grantor retained annuity trusts for the benefit of members of her immediate family which own 7,552,267 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,678,298 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock,"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"(Continued from Footnote 6) (v) a manager of limited liability companies being treated as corporations for purposes of Section 16, which own 8,200,000 shares of the Issuer's Common Stock and (vi) as referenced in footnote 5, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock.  Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares.  The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":2103760,"source":{"system":"sec-edgar","filing":"0000899243-22-038970","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038970/doc4.xml","form_type":"4"}},{"id":2150066,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (2)"}}],"security":"Restricted Stock Units","published_at":"2022-09-28T21:07:31.000Z","date":"2022-09-26","kind":"grant","acquired":true,"shares":25.9881,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on September 26, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"shares","element":"transactionShares","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on September 26, 2022. 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 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on September 26, 2022. 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 with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on September 26, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F1","text":"Represents dividend equivalent units (\"DEUs\") accrued with respect to time-vested restricted stock units (\"RSUs\") of Amkor Technology, Inc. (the \"Issuer\") upon the Issuer's payment of a dividend on September 26, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."}],"balance_after":8756.5397,"derivative":{"underlying":"Common Stock","underlying_shares":25.9881},"source":{"system":"sec-edgar","filing":"0001209191-22-051479","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122051479/doc4.xml","form_type":"4"}},{"id":2156355,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(5)"}}],"security":"Common Stock","published_at":"2022-09-19T20:58:40.000Z","date":"2022-09-07","kind":"gift","acquired":false,"shares":283500,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By James J. Kim GRAT dtd 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 7, 2022, the Qualified Annuity Trust Under the James J. Kim 2020-1 Qualified Annuity Trust Agreement Dated 04/01/20 distributed 283,500 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim.  The Reporting Person is a trustee of the trust.  James J. Kim and the Reporting Person are father and daughter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATs\")) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of GRATs created by members of her immediate family which own 10,228,178 shares of the Issuer's Common Stock, (iii) a trustee of GRATs of which she was the settlor and is the sole annuitant which own 3,794,798 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's Common Stock, (v) a manager of limited liability companies (\"LLCs\") being treated as corporations for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), which own 8,200,000 shares of the Issuer's Common Stock and (vi) a manager of an LLC being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's Common Stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares.  The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":1117623,"source":{"system":"sec-edgar","filing":"0000899243-22-031480","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322031480/doc4.xml","form_type":"4"}},{"id":2219557,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Restricted Stock Units","published_at":"2022-06-29T23:53:54.000Z","date":"2022-06-27","kind":"grant","acquired":true,"shares":24.5516,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents DEUs accrued with respect to the RSUs upon the Issuer's payment of a dividend on June 27, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"shares","element":"transactionShares","label":"F5","text":"Represents DEUs accrued with respect to the RSUs upon the Issuer's payment of a dividend on June 27, 2022. 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":"F5","text":"Represents DEUs accrued with respect to the RSUs upon the Issuer's payment of a dividend on June 27, 2022. 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":"F5","text":"Represents DEUs accrued with respect to the RSUs upon the Issuer's payment of a dividend on June 27, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"derivative.underlying_shares","element":"underlyingSecurityShares","label":"F5","text":"Represents DEUs accrued with respect to the RSUs upon the Issuer's payment of a dividend on June 27, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"As previously reported in a Form 4 filed by the Reporting Person on May 19, 2022 (the \"Original Form 4\"), 8,706 shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units (the \"RSUs\") were granted to the Reporting Person on May 17, 2022. Pursuant to the award agreement for the RSUs, dividend equivalent units (\"DEUs\") accrue with respect to the RSUs when and as dividends are paid on the Issuer's common stock. In the Original Form 4, the RSUs were incorrectly reported in Table I. Table II, Column 9 of this Form 4 has been adjusted to include the RSUs and reflects the proper number of RSUs beneficially owned by the Reporting Person as of the filing date of this Form 4."}],"balance_after":8730.5516,"derivative":{"underlying":"Common Stock","underlying_shares":24.5516},"source":{"system":"sec-edgar","filing":"0001209191-22-039866","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122039866/doc4.xml","form_type":"4"}},{"id":2219556,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2022-06-29T23:53:54.000Z","date":"2022-06-23","kind":"gift","acquired":false,"shares":274900,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By John T. Kim GRAT dtd 2/6/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On June 23, 2022, the John T. Kim 2018 Irrevocable Trust dated February 6, 2018 distributed 274,900 shares of the Issuer's common stock to John T. Kim. The Reporting Person is a trustee of the trust. John T. Kim and the Reporting Person are brother and sister."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts (\"GRATS\")) which own 9,181,498 shares of the Issuer's common stock, (ii) a trustee of GRATS created by members of her immediate family which own 10,511,678 shares of the Issuer's common stock, (iii) a trustee of GRATS of which she was the settlor and is the sole annuitant which own 4,224,548 shares of the Issuer's common stock, (iv) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's common stock, (v) a manager of limited liability companies (\"LLCs\") being treated as corporations for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), which own 8,200,000 shares of the Issuer's common stock, and (vi) a manager of an LLC being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's common stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 or for any other purpose."}],"balance_after":753232,"source":{"system":"sec-edgar","filing":"0001209191-22-039866","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122039866/doc4.xml","form_type":"4"}},{"id":2264261,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-05-19T21:21:15.000Z","date":"2022-05-17","kind":"grant","acquired":true,"shares":8706,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"Represents shares of Amkor Technology, Inc. (the \"Issuer\") common stock underlying time-vested restricted stock units granted on May 17, 2022 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\").  Subject to the terms and conditions of the applicable award agreement, the RSUs 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 the stockholders immediately following the Grant Date.  The RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer."}],"balance_after":5384190,"source":{"system":"sec-edgar","filing":"0001209191-22-030649","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122030649/doc4.xml","form_type":"4"}},{"id":2294164,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-04-20T23:23:09.000Z","date":"2022-04-04","kind":"gift","acquired":false,"shares":755000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Agnes C. Kim GRAT dtd 12/16/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On April 4, 2022, the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A dated 12/16/20 distributed 755,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Agnes C. Kim.  The Reporting Person is the sole trustee of the trust.  Agnes C. Kim and the Reporting Person are mother and daughter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts) which own 9,181,498 shares of the Issuer's Common Stock, (ii) a trustee of grantor retained annuity trusts created by members of her immediate family which own 10,786,578 shares of the Issuer's Common Stock, (iii) a trustee of grantor retained annuity trusts of which she was the settlor and is the sole annuitant which own 4,224,548 shares of the Issuer's Common stock, (iv) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's Common Stock, (v) a manager of limited liability companies being treated as corporations for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"),"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued from Footnote 2) which own 8,200,00 shares of the Issuer's Common Stock and (vi) a manager of a manager-managed limited liability company being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's Common Stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of these shares.  The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":3328065,"source":{"system":"sec-edgar","filing":"0000899243-22-015215","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322015215/doc4.xml","form_type":"4"}},{"id":2429072,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-12-27","kind":"gift","acquired":false,"shares":164678,"price":23.45,"value":3861699.1,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F9","text":"On December 27, 2021, the reporting person transferred 164,678 shares of the Issuer's Common Stock to Susins, LLC.  Susins, LLC is being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\").  Its managers are John T. Kim and Liam E. Blaney."}],"balance_after":5249884,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}},{"id":2429071,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-12-15","kind":"gift","acquired":true,"shares":596920,"price":24.68,"value":14731985.6,"ownership":{"direct":false,"nature":"By James J. Kim GRAT dtd 12/15/21"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F8","text":"On December 15, 2021, James J. Kim transferred 596,920 shares of the Issuer's Common Stock to the James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F11","text":"Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of these shares.  The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":2353347,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}},{"id":2429070,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-12-15","kind":"gift","acquired":false,"shares":596920,"price":24.68,"value":14731985.6,"ownership":{"direct":false,"nature":"By James J. Kim GRAT dtd 9/10/19"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","text":"On December 15, 2021, the Qualified Annuity Trust under the James J. Kim 2019-1 Qualified Annuity Trust Agreement dtd September 10, 2019 distributed 596,920 shares of the Issuer's Common Stock to James J. Kim.  James J. Kim and Susan Y. Kim are the co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F11","text":"Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of these shares.  The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":2675911,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}},{"id":2429069,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-12-15","kind":"gift","acquired":true,"shares":1756427,"price":24.68,"value":43348618.36,"ownership":{"direct":false,"nature":"By James J. Kim GRAT dtd 12/15/21"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"On December 15, 2021, James J. Kim transferred 1,756,427 shares of the Issuer's Common Stock to the James J. Kim 2021 Qualified Annuity Trust U/A Dated 12/15/2021.  James J. Kim and the reporting person are the co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F11","text":"Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of these shares.  The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":1756427,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}},{"id":2429068,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-10-04","kind":"gift","acquired":true,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to the reporting person."}],"balance_after":5414562,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}},{"id":2429067,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-10-04","kind":"gift","acquired":false,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":false,"nature":"By James J. Kim GRAT dtd 8/30/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to the reporting person."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}},{"id":2429066,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":35459,"kind":"person","name":"KIM SUSAN Y","position":1,"cik":"0001158922","reported_name":"KIM SUSAN Y","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group\t(15)"}}],"security":"Common Stock","published_at":"2022-01-21T20:38:28.000Z","date":"2021-10-04","kind":"gift","acquired":false,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":false,"nature":"By James J. Kim GRAT dtd 8/30/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to John T. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F11","text":"Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of these shares.  The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":626192,"source":{"system":"sec-edgar","filing":"0000899243-22-002858","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002858/doc4.xml","form_type":"4"}}],"next_cursor":"2022-01-21T20:38:28.000000Z,2429066"}