{"transactions":[{"id":704888,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2026-07-22T20:32:29.000Z","date":"2026-07-20","kind":"exercise","planned":false,"acquired":false,"shares":250000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option (the \"2019 Option\") to acquire 250,000 shares of the Issuer's Common Stock (the \"2019 Option Shares\") was granted on February 15, 2019 (the \"2019 Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the 2019 Option Shares, on the first anniversary of the 2019 Option Grant Date; and (ii) with respect to the remainder of the 2019 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2019 Option vested on the fourth anniversary of the 2019 Option Grant Date."}],"balance_after":0,"derivative":{"exercise_price":9.48,"exercise_date":"2023-02-15","expiration_date":"2026-10-31","underlying":"Common Stock","underlying_shares":250000},"source":{"system":"sec-edgar","filing":"0001158839-26-000001","document":"wk-form4_1784752346.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883926000001/wk-form4_1784752346.xml","form_type":"4"}},{"id":704887,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2026-07-22T20:32:29.000Z","date":"2026-07-20","kind":"exercise","planned":false,"acquired":false,"shares":200000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option (the \"2017 Option\") to acquire 200,000 shares of the Issuer's Common Stock (the \"2017 Option Shares\") was granted on February 27, 2017 (the \"2017 Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the 2017 Option Shares, on the first anniversary of the 2017 Option Grant Date; and (ii) with respect to the remainder of the 2017 Option Shares, in equal quarterly installments thereafter, such that 100% of the 2017 Option vested on the fourth anniversary of the 2017 Option Grant Date."}],"balance_after":0,"derivative":{"exercise_price":9.86,"exercise_date":"2021-02-27","expiration_date":"2026-10-31","underlying":"Common Stock","underlying_shares":200000},"source":{"system":"sec-edgar","filing":"0001158839-26-000001","document":"wk-form4_1784752346.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883926000001/wk-form4_1784752346.xml","form_type":"4"}},{"id":704886,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2026-07-22T20:32:29.000Z","date":"2026-07-20","kind":"exercise","planned":false,"acquired":true,"shares":250000,"price":9.48,"value":2370000.0,"ownership":{"direct":true},"balance_after":511645,"source":{"system":"sec-edgar","filing":"0001158839-26-000001","document":"wk-form4_1784752346.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883926000001/wk-form4_1784752346.xml","form_type":"4"}},{"id":704885,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2026-07-22T20:32:29.000Z","date":"2026-07-20","kind":"exercise","planned":false,"acquired":true,"shares":200000,"price":9.86,"value":1972000.0,"ownership":{"direct":true},"balance_after":261645,"source":{"system":"sec-edgar","filing":"0001158839-26-000001","document":"wk-form4_1784752346.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883926000001/wk-form4_1784752346.xml","form_type":"4"}},{"id":957522,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-12-30T21:40:16.000Z","date":"2025-12-26","kind":"gift","planned":false,"acquired":true,"shares":725000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"Susan Y. Kim 2023 Family Distribution Trust"},"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. Susan Y. Kim is the trustee of the 2023 Grantor Retained Annuity Trust Dated 9/15/2023. The Reporting Person and John T. 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 his immediate family members which own 9,786,032 shares of the Issuer's Common Stock (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 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":"F3","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":725000,"source":{"system":"sec-edgar","filing":"0001158839-25-000017","document":"wk-form4_1767130813.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000017/wk-form4_1767130813.xml","form_type":"4"}},{"id":960047,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-12-24T00:01:30.000Z","date":"2025-12-19","kind":"gift","planned":false,"acquired":false,"shares":2538000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"On December 19, 2025, the spouse of the Reporting Person, 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\nof Agnes C. Kim. Susan Y. Kim is the sole trustee of the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001158839-25-000015","document":"wk-form4_1766534487.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000015/wk-form4_1766534487.xml","form_type":"4"}},{"id":960046,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-12-24T00:01:30.000Z","date":"2025-12-19","kind":"gift","planned":false,"acquired":false,"shares":3244594,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 24, 2025, the Reporting Person reported that the 2024 Grantor Retained Annuity Trust of John J. Kim 8/5/2024 distributed 965,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the James J. Kim Revocable Trust dtd 08/30/2018. These shares were inadvertently reported as being held indirectly by the James J. Kim 2018-1 Qualified Annuity Trust U/A on a Form 4 filed by the Reporting Person on November 24, 2025. These shares were direct holdings of the Reporting Person, as the Reporting Person is the settlor, sole trustee, and sole beneficiary of such trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On December 19, 2025, the Reporting Person made a distribution of 3,244,594 shares of common stock of the Issuer to the 2025 Grantor Retained Annuity Trust No. 1 of James J. Kim. Susan Y. Kim is the sole trustee of the 2025 Grantor Retained Annuity Trust No.1 of James J. Kim."}],"balance_after":61645,"source":{"system":"sec-edgar","filing":"0001158839-25-000015","document":"wk-form4_1766534487.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000015/wk-form4_1766534487.xml","form_type":"4"}},{"id":990514,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:23.000Z","date":"2025-11-21","kind":"gift","planned":false,"acquired":true,"shares":965000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (excluding GRATs)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","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 Amkor Technology, Inc. (the \"Issuer\") to the James J. Kim 2018-1 Qualified Annuity Trust U/A dated 8/30/18. The Reporting Person and Susan Y. Kim are co-trustees of the trust."}],"balance_after":965000,"source":{"system":"sec-edgar","filing":"0001158839-25-000013","document":"wk-form4_1764035900.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000013/wk-form4_1764035900.xml","form_type":"4"}},{"id":1075186,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-08-05T23:32:13.000Z","date":"2025-08-01","kind":"sale","planned":false,"acquired":false,"shares":441589,"price":21.85,"value":9648719.65,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 1, 2025, the Reporting Person distributed 441,589 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."}],"balance_after":2341239,"source":{"system":"sec-edgar","filing":"0001158839-25-000011","document":"wk-form4_1754436730.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000011/wk-form4_1754436730.xml","form_type":"4"}},{"id":1077808,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-08-01T20:42:39.000Z","date":"2025-07-30","kind":"gift","planned":false,"acquired":true,"shares":1738000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On July 30, 2025, 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 spouse of the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","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":1833000,"source":{"system":"sec-edgar","filing":"0001158839-25-000009","document":"wk-form4_1754080942.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000009/wk-form4_1754080942.xml","form_type":"4"}},{"id":1077807,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-08-01T20:42:39.000Z","date":"2025-07-30","kind":"gift","planned":false,"acquired":true,"shares":2711000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On July 30, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 2,711,000 of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."}],"balance_after":2782828,"source":{"system":"sec-edgar","filing":"0001158839-25-000009","document":"wk-form4_1754080942.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000009/wk-form4_1754080942.xml","form_type":"4"}},{"id":1243873,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-02-26T22:13:57.000Z","date":"2025-02-24","kind":"sale","planned":false,"acquired":false,"shares":869565,"price":21.85,"value":18999995.25,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 24, 2025, the Reporting Person 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."}],"balance_after":71828,"source":{"system":"sec-edgar","filing":"0001158839-25-000004","document":"wk-form4_1740608029.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000004/wk-form4_1740608029.xml","form_type":"4"}},{"id":1253787,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2025-02-21T21:46:52.000Z","date":"2025-02-19","kind":"tax_withholding","planned":false,"acquired":false,"shares":1528,"price":22.72,"value":34716.16,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":941393,"source":{"system":"sec-edgar","filing":"0001047127-25-000042","document":"wk-form4_1740174405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000042/wk-form4_1740174405.xml","form_type":"4"}},{"id":1253786,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2025-02-21T21:46:52.000Z","date":"2025-02-19","kind":"grant","planned":false,"acquired":true,"shares":3196,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This Form 4 reports the vesting on February 19, 2025 of 3,196 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") underlying performance-vested restricted stock units (\"PSUs\") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024."}],"balance_after":942921,"source":{"system":"sec-edgar","filing":"0001047127-25-000042","document":"wk-form4_1740174405.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000042/wk-form4_1740174405.xml","form_type":"4"}},{"id":1298115,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2025-01-22T21:59:02.000Z","date":"2025-01-17","kind":"gift","planned":false,"acquired":false,"shares":548000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By self as Trustee of own GRATs"},"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 Susan Y. Kim and 274,000 shares of the Issuer's Common Stock to John T. Kim. The Reporting Person and Susan Y. Kim are co-trustees of the JJK 2021 Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On January 7, 2025, the JJK 2021 Trust distributed 790,097 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is a trustee of the JJK 2021 Trust, this transaction was a mere change in the Reporting Person's form of ownership from indirect to direct and thus not reportable on a Form 4."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001158839-25-000002","document":"wk-form4_1737583135.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883925000002/wk-form4_1737583135.xml","form_type":"4"}},{"id":1377400,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Restricted Stock Units","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":false,"shares":6457,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F10","text":"On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F10","text":"On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":6457},"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":17,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377399,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Restricted Stock Units","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":false,"shares":1639,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F9","text":"On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":1639},"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377398,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Restricted Stock Units","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":false,"shares":1840,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F8","text":"On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":1840},"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377397,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Restricted Stock Units","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":false,"shares":1962,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F7","text":"On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited."}],"balance_after":0,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":1962},"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377396,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":2744,"price":25.45,"value":69834.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on\nFebruary 20, 2024 (the \"2024 Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax\nwithholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":149628,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377395,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":true,"shares":6457,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":152372,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377394,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":697,"price":25.45,"value":17738.65,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on\nFebruary 16, 2023 (the \"2023 Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax\nwithholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":145915,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377393,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":true,"shares":1639,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":146612,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377392,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":782,"price":25.45,"value":19901.9,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on\nFebruary 24, 2022 (the \"2022 Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax\nwithholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":144973,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377391,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":true,"shares":1840,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":145755,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377390,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"tax_withholding","planned":false,"acquired":false,"shares":834,"price":25.45,"value":21225.3,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction represents shares withheld by Amkor Technology, Inc. (the \"Issuer\") in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person on\nFebruary 11, 2021 (the \"2021 Grant Date\") pursuant to the Issuer's 2007 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax\nwithholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":143915,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1377389,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2024-11-04T21:34:58.000Z","date":"2024-10-31","kind":"exercise","planned":false,"acquired":true,"shares":1962,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":144749,"source":{"system":"sec-edgar","filing":"0001047127-24-000205","document":"wk-form4_1730756089.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000205/wk-form4_1730756089.xml","form_type":"4"}},{"id":1436248,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-08-12T21:21:30.000Z","date":"2024-08-08","kind":"gift","planned":false,"acquired":false,"shares":1600000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","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. Agnes C. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","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":95000,"source":{"system":"sec-edgar","filing":"0001158839-24-000005","document":"wk-form4_1723497684.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883924000005/wk-form4_1723497684.xml","form_type":"4"}},{"id":1436247,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-08-12T21:21:30.000Z","date":"2024-08-08","kind":"gift","planned":false,"acquired":false,"shares":2200000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 8, 2024, the Reporting Person transferred 2,200,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the 2024 Grantor Annuity Trust of James J. Kim dtd. 8/5/2024 as a gift. Susan Y. Kim is the sole trustee of the trust."}],"balance_after":142787,"source":{"system":"sec-edgar","filing":"0001158839-24-000005","document":"wk-form4_1723497684.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883924000005/wk-form4_1723497684.xml","form_type":"4"}},{"id":1479583,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-06-14T21:30:10.000Z","date":"2024-06-12","kind":"gift","planned":false,"acquired":true,"shares":980000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","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 spouse of the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","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":1695000,"source":{"system":"sec-edgar","filing":"0001158839-24-000002","document":"wk-form4_1718400602.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883924000002/wk-form4_1718400602.xml","form_type":"4"}},{"id":1479582,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-06-14T21:30:10.000Z","date":"2024-06-12","kind":"gift","planned":false,"acquired":true,"shares":1530000,"price":0,"value":0.0,"ownership":{"direct":true},"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  Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."}],"balance_after":2342787,"source":{"system":"sec-edgar","filing":"0001158839-24-000002","document":"wk-form4_1718400602.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115883924000002/wk-form4_1718400602.xml","form_type":"4"}},{"id":1616690,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2024-02-27T21:30:50.000Z","date":"2024-02-23","kind":"exercise","planned":false,"acquired":false,"shares":2599,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,748 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,748 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,748 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":5374,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2599},"source":{"system":"sec-edgar","filing":"0001047127-24-000048","document":"wk-form4_1709069441.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000048/wk-form4_1709069441.xml","form_type":"4"}},{"id":1616689,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-02-27T21:30:50.000Z","date":"2024-02-23","kind":"tax_withholding","planned":false,"acquired":false,"shares":1051,"price":30.59,"value":32150.09,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction represents shares withheld by Amkor Technology, Inc. (the \"Issuer\") in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person on February 24,\n2022 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding\nobligations. The Issuer will pay these taxes on behalf of the Reporting Person"}],"balance_after":812787,"source":{"system":"sec-edgar","filing":"0001047127-24-000048","document":"wk-form4_1709069441.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000048/wk-form4_1709069441.xml","form_type":"4"}},{"id":1616688,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-02-27T21:30:50.000Z","date":"2024-02-23","kind":"exercise","planned":false,"acquired":true,"shares":2599,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":813838,"source":{"system":"sec-edgar","filing":"0001047127-24-000048","document":"wk-form4_1709069441.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000048/wk-form4_1709069441.xml","form_type":"4"}},{"id":1626069,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2024-02-22T22:33:11.000Z","date":"2024-02-20","kind":"grant","planned":false,"acquired":true,"shares":27731,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F5","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date."}],"balance_after":27731,"derivative":{"underlying":"Common Stock","underlying_shares":27731},"source":{"system":"sec-edgar","filing":"0001047127-24-000034","document":"wk-form4_1708641162.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000034/wk-form4_1708641162.xml","form_type":"4"}},{"id":1626068,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2024-02-22T22:33:11.000Z","date":"2024-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":6976,"price":29.75,"value":207536.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. The Issuer will\npay these taxes on behalf of the Reporting Person."}],"balance_after":811239,"source":{"system":"sec-edgar","filing":"0001047127-24-000034","document":"wk-form4_1708641162.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000034/wk-form4_1708641162.xml","form_type":"4"}},{"id":1626067,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2024-02-22T22:33:11.000Z","date":"2024-02-20","kind":"grant","planned":false,"acquired":true,"shares":16444,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This Form 4 reports the vesting on February 20, 2024, of 16,444 shares of Amkor Technology, Inc. (the \"Issuer\") Common Stock underlying performance-vested restricted stock units (\"PSUs\") granted to the Reporting Person on February 24, 2022 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic\ncumulative earnings per share performance goal over a two-year performance period beginning January 1, 2022 and ending on December 31, 2023."}],"balance_after":818215,"source":{"system":"sec-edgar","filing":"0001047127-24-000034","document":"wk-form4_1708641162.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000034/wk-form4_1708641162.xml","form_type":"4"}},{"id":1630185,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2024-02-21T22:02:34.000Z","date":"2024-02-16","kind":"exercise","planned":false,"acquired":false,"shares":2242,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 9,279 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 9,279 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":6959,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2242},"source":{"system":"sec-edgar","filing":"0001047127-24-000022","document":"wk-form4_1708552922.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000022/wk-form4_1708552922.xml","form_type":"4"}},{"id":1630184,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-02-21T22:02:34.000Z","date":"2024-02-16","kind":"tax_withholding","planned":false,"acquired":false,"shares":922,"price":30.01,"value":27669.22,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction represents shares withheld by Amkor Technology, Inc. (the \"Issuer\") in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person on February 16,\n2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting\nPerson's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":801771,"source":{"system":"sec-edgar","filing":"0001047127-24-000022","document":"wk-form4_1708552922.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000022/wk-form4_1708552922.xml","form_type":"4"}},{"id":1630183,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-02-21T22:02:34.000Z","date":"2024-02-16","kind":"exercise","planned":false,"acquired":true,"shares":2242,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":802693,"source":{"system":"sec-edgar","filing":"0001047127-24-000022","document":"wk-form4_1708552922.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000022/wk-form4_1708552922.xml","form_type":"4"}},{"id":1646940,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2024-02-13T22:14:17.000Z","date":"2024-02-09","kind":"exercise","planned":false,"acquired":false,"shares":2630,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":2723,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2630},"source":{"system":"sec-edgar","filing":"0001047127-24-000012","document":"wk-form4_1707862438.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000012/wk-form4_1707862438.xml","form_type":"4"}},{"id":1646939,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-02-13T22:14:17.000Z","date":"2024-02-09","kind":"tax_withholding","planned":false,"acquired":false,"shares":1081,"price":31.2,"value":33727.2,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction represents share withheld by Amkor Technology, Inc. (the \"Issuer\") in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person on February 11, 2021 (the \"Grant Date\") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations.  The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":800451,"source":{"system":"sec-edgar","filing":"0001047127-24-000012","document":"wk-form4_1707862438.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000012/wk-form4_1707862438.xml","form_type":"4"}},{"id":1646938,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-02-13T22:14:17.000Z","date":"2024-02-09","kind":"exercise","planned":false,"acquired":true,"shares":2630,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":801532,"source":{"system":"sec-edgar","filing":"0001047127-24-000012","document":"wk-form4_1707862438.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712724000012/wk-form4_1707862438.xml","form_type":"4"}},{"id":1699669,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:15.000Z","date":"2023-12-22","kind":"gift","planned":false,"acquired":true,"shares":715000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"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. Agnes C. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the ACK 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."}],"balance_after":715000,"source":{"system":"sec-edgar","filing":"0001209191-23-059787","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059787/doc4.xml","form_type":"4"}},{"id":1702609,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"exercise","planned":false,"acquired":false,"shares":78,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F3","text":"The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"shares","element":"transactionShares","label":"F3","text":"The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":9201,"derivative":{"underlying":"Common Stock","underlying_shares":78},"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702608,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"exercise","planned":false,"acquired":false,"shares":88,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"shares","element":"transactionShares","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"Reflects an adjustment of 88 RSUs incorrectly attributed to the Reporting Person on the Form 4 filed on behalf of the Reporting Person on February 24, 2023 that had been surrendered for the Reporting Person's retirement eligibility withholding."}],"balance_after":7973,"derivative":{"underlying":"Common Stock","underlying_shares":88},"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702607,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"exercise","planned":false,"acquired":false,"shares":93,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person's retirement eligibility status."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":5353,"derivative":{"underlying":"Common Stock","underlying_shares":93},"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":12,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702606,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"gift","planned":false,"acquired":true,"shares":529650,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On December 19, 2023, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 distributed 529,650 of the Issuer's Common Stock to the Reporting Person."}],"balance_after":798902,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702605,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"gift","planned":false,"acquired":false,"shares":529650,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By self as Trustee of own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On December 19, 2023, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 distributed 529,650 of the Issuer's Common Stock to the Reporting Person."},{"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."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"The Reporting Person is (i) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,338,097 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 9,786,032 shares of the Issuer's Common Stock and (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 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":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702604,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"tax_withholding","planned":false,"acquired":false,"shares":78,"price":33.79,"value":2635.62,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":269252,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702603,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"exercise","planned":false,"acquired":true,"shares":78,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The reported transaction involved the withholding of 78 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":269330,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702602,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"tax_withholding","planned":false,"acquired":false,"shares":88,"price":33.79,"value":2973.52,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":269252,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702601,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"exercise","planned":false,"acquired":true,"shares":88,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":269340,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702600,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"tax_withholding","planned":false,"acquired":false,"shares":93,"price":33.79,"value":3142.47,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":269252,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1702599,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2023-12-21T22:10:37.000Z","date":"2023-12-19","kind":"exercise","planned":false,"acquired":true,"shares":93,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The reported transaction involved the withholding of 93 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person's retirement eligibility status."}],"balance_after":269345,"source":{"system":"sec-edgar","filing":"0001209191-23-059460","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059460/doc4.xml","form_type":"4"}},{"id":1739535,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:15.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":false,"shares":1211193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim Family Trust U/A dtd. 8/29/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On November 14, 2023, the Family Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18 distributed 1,211,193 shares of the Issuer's Common Stock to Kim Capital Partners - KCP, LLC. The Reporting Person and Susan Y. Kim are co-trustees of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-055587","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055587/doc4.xml","form_type":"4"}},{"id":1739534,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:15.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":false,"shares":1958355,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim Family Trust U/A dtd. 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 14, 2023, the Family Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dtd. 4/1/20 distributed 1,958,355 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Kim Capital Partners - KCP, LLC. The Reporting Person and Susan Y. Kim are co-trustees of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-055587","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055587/doc4.xml","form_type":"4"}},{"id":1756344,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-10-23T22:00:15.000Z","date":"2023-10-19","kind":"gift","planned":false,"acquired":true,"shares":1211193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim Family Trust U/A dtd. 8/29/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 19, 2023, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dated 8/29/18 (the \"SYK 2018 GRAT\") distributed 1,211,193 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dated 8/29/18 (the \"SYK 2018 Family Trust\"). The Reporting Person and Susan Y. Kim are co-trustees of the SYK 2018 GRAT and SYK 2018 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 grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,867,747 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 12,955,580 shares of the Issuer's Common Stock, (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock, and (iv) 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":1211193,"source":{"system":"sec-edgar","filing":"0001209191-23-053364","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123053364/doc4.xml","form_type":"4"}},{"id":1756343,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-10-23T22:00:15.000Z","date":"2023-10-19","kind":"gift","planned":false,"acquired":false,"shares":1211193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim 2018-1 GRAT dtd. 8/29/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 19, 2023, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dated 8/29/18 (the \"SYK 2018 GRAT\") distributed 1,211,193 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dated 8/29/18 (the \"SYK 2018 Family Trust\"). The Reporting Person and Susan Y. Kim are co-trustees of the SYK 2018 GRAT and SYK 2018 Family Trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-053364","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123053364/doc4.xml","form_type":"4"}},{"id":1760706,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-10-13T22:00:18.000Z","date":"2023-10-11","kind":"gift","planned":false,"acquired":false,"shares":168750,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim 2018-1 GRAT dtd. 8/29/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 11, 2023, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18 distributed 168,750 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Susan Y. Kim. The Reporting Person and Susan Y. Kim are co-trustees 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 grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,867,747 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 12,955,580 shares of the Issuer's Common Stock, (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock, and (iv) 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":1211193,"source":{"system":"sec-edgar","filing":"0001209191-23-052792","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123052792/doc4.xml","form_type":"4"}},{"id":1779315,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-09-18T22:00:13.000Z","date":"2023-09-14","kind":"gift","planned":false,"acquired":true,"shares":1958355,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim Family Trust U/A dtd. 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 14, 2023, the Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the \"SYK 2020 GRAT\") distributed 1,958,355 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the \"SYK 2020 Family Trust\"). The Reporting Person and Susan Y. Kim are co-trustees of the SYK 2020 GRAT and SYK 2020 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 grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,867,747 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 13,124,330 shares of the Issuer's Common Stock, (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock, and (iv) 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":1958355,"source":{"system":"sec-edgar","filing":"0001209191-23-049800","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123049800/doc4.xml","form_type":"4"}},{"id":1779314,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-09-18T22:00:13.000Z","date":"2023-09-14","kind":"gift","planned":false,"acquired":false,"shares":1958355,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim 2020-1 GRAT dtd. 4/1/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On September 14, 2023, the Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the \"SYK 2020 GRAT\") distributed 1,958,355 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the \"SYK 2020 Family Trust\"). The Reporting Person and Susan Y. Kim are co-trustees of the SYK 2020 GRAT and SYK 2020 Family Trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-049800","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123049800/doc4.xml","form_type":"4"}},{"id":1784978,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-09-08T22:48:16.000Z","date":"2023-09-06","kind":"sale","planned":false,"acquired":false,"shares":10000000,"price":23.22,"value":232200000.0,"ownership":{"direct":false,"nature":"By 915 Investments, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 6, 2023, 915 Investments, LP sold 10,000,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") pursuant to an underwritten secondary offering. The Reporting Person is the general partner of 915 Investments, LP."},{"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 grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,867,747 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 13,124,330 shares of the Issuer's Common Stock, (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock, and (iv) 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":39594980,"source":{"system":"sec-edgar","filing":"0001209191-23-048842","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123048842/doc4.xml","form_type":"4"}},{"id":1822342,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:47.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":false,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By self as Trustee of own GRATs"},"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 Susan Y. Kim. The Reporting Person and Susan Y. Kim are co-trustees of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","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":"The Reporting Person is (i) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,867,747 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 13,124,330 shares of the Issuer's Common Stock, (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock, and (iv) a general partner of a limited partnership which owns 49,594,980 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":1867747,"source":{"system":"sec-edgar","filing":"0001209191-23-043571","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043571/doc4.xml","form_type":"4"}},{"id":1822341,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:47.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":false,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By self as Trustee of own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 25, 2023, the Qualified Annuity Trust under the James J. Kim 2020-1 Qualified Annuity Trust Agreement Dated 4/1/20 (the \"JJK Trust\") distributed 443,811 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to John T. Kim. The Reporting Person and Susan Y. Kim are co-trustees of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On June 27, 2023, the JJK Trust distributed 230,001 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 not reportable by the Reporting Person on a Form 4."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","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":"The Reporting Person is (i) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 1,867,747 shares of the Issuer's Common Stock, (ii) a trustee of trusts for the benefit of his immediate family members which own 13,124,330 shares of the Issuer's Common Stock, (iii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16, which limited liability company holds 164,678 shares of the Issuer's Common stock, and (iv) a general partner of a limited partnership which owns 49,594,980 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":2311558,"source":{"system":"sec-edgar","filing":"0001209191-23-043571","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043571/doc4.xml","form_type":"4"}},{"id":1906644,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-05-03T22:00:18.000Z","date":"2023-05-01","kind":"gift","planned":false,"acquired":false,"shares":3278001,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On May 1, 2023, Agnes C. Kim transferred 3,278,001 shares of the Issuer's Common Stock to the 2023 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 4/26/23 as a gift. Agnes C. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-027135","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123027135/doc4.xml","form_type":"4"}},{"id":1906643,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-05-03T22:00:18.000Z","date":"2023-05-01","kind":"gift","planned":false,"acquired":false,"shares":5117004,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 1, 2023, the Reporting Person transferred 5,117,004 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the 2023 Grantor Annuity Trust of James J. Kim dtd. 4/26/23 as a gift. Susan Y. Kim is the sole trustee of the trust."}],"balance_after":39251,"source":{"system":"sec-edgar","filing":"0001209191-23-027135","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123027135/doc4.xml","form_type":"4"}},{"id":1993917,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Restricted Stock Units","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-24","kind":"exercise","acquired":false,"shares":2599,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F8","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":8149,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2599},"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":18,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993916,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-24","kind":"tax_withholding","acquired":false,"shares":1053,"price":25.27,"value":26609.31,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F9","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on the RSU Grant Date.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":5156255,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993915,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-24","kind":"exercise","acquired":true,"shares":2599,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F8","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":5157308,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993914,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"tax_withholding","acquired":false,"shares":25267,"price":25.28,"value":638749.76,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations.  The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":5154709,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993913,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"grant","acquired":true,"shares":59477,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"This Form 4 reports the vesting on February 22, 2023, of 59,477 shares of the Issuer's Common Stock  underlying performance-vested restricted stock units (\"PSUs\") granted to the Reporting Person on February 11, 2021 pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic cumulative earnings per share performance goal over a two-year performance period beginning January 1, 2021 and ending on December 31, 2022."}],"balance_after":5179976,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993912,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim, Settlor, FBO Jason Lee Kim dated 11/17/03 sold 384,000 shares of the Issuer's Common Stock to the Reporting Person in full payment of the principal and accrued interest of a note payable to the Reporting Person by such trust. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":5120499,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993911,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94 sold 384,000 shares of the Issuer's Common Stock to the Reporting Person in full payment of the principal and accrued interest of a note payable to the Reporting Person by such trust. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":4736499,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993910,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01 sold 384,000 shares of the Issuer's Common Stock to the Reporting Person in full payment of the principal and accrued interest of a note payable to the Reporting Person by such trust. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":4352499,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993909,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01 sold 384,000 shares of the Issuer's Common Stock to the Reporting Person in full payment of the principal and accrued interest of a note payable to the Reporting Person by such trust. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":3968499,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":1993908,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (12)"}}],"security":"Common Stock","published_at":"2023-02-25T00:20:04.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92 sold 384,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person in full payment of the principal and accrued interest of a note payable to the Reporting Person by such trust. This transaction is exempt pursuant to Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), and is voluntarily reported."}],"balance_after":3584499,"source":{"system":"sec-edgar","filing":"0001209191-23-012923","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012923/doc4.xml","form_type":"4"}},{"id":2008573,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Restricted Stock Units","published_at":"2023-02-17T22:09:41.000Z","date":"2023-02-16","kind":"grant","acquired":true,"shares":9279,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's services as an employee of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's services as an employee of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's services as an employee of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":9279,"derivative":{"underlying":"Common Stock","underlying_shares":9279},"source":{"system":"sec-edgar","filing":"0001209191-23-010762","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010762/doc4.xml","form_type":"4"}},{"id":2011724,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-02-16T17:53:49.000Z","date":"2023-02-09","kind":"gift","acquired":true,"shares":667225,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 9, 2023, the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A Dated 12/16/20 distributed 667,225 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Agnes C. Kim. Agnes C. Kim is the spouse of 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":3278001,"source":{"system":"sec-edgar","filing":"0001209191-23-009973","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009973/doc4.xml","form_type":"4"}},{"id":2017301,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2023-02-15T00:56:37.000Z","date":"2023-02-10","kind":"exercise","acquired":false,"shares":2630,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the Grant Date, the Reporting Person was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":5446,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2630},"source":{"system":"sec-edgar","filing":"0001209191-23-009532","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009532/doc4.xml","form_type":"4"}},{"id":2017300,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-02-15T00:56:37.000Z","date":"2023-02-10","kind":"tax_withholding","acquired":false,"shares":1081,"price":27.6,"value":29835.6,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The transaction represents shares withheld by Amkor Technology, Inc. (the \"Issuer\") in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person on February 11, 2021 (the \"Grant Date\") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":2714899,"source":{"system":"sec-edgar","filing":"0001209191-23-009532","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009532/doc4.xml","form_type":"4"}},{"id":2017299,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-02-15T00:56:37.000Z","date":"2023-02-10","kind":"exercise","acquired":true,"shares":2630,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":2715980,"source":{"system":"sec-edgar","filing":"0001209191-23-009532","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009532/doc4.xml","form_type":"4"}},{"id":2079043,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2022-12-21T22:11:10.000Z","date":"2022-12-19","kind":"exercise","acquired":false,"shares":88,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay income taxes associated with the Reporting Person becoming retirement eligible."},{"field":"shares","element":"transactionShares","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay income taxes associated with the Reporting Person becoming retirement eligible."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay income taxes associated with the Reporting Person becoming retirement eligible."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay income taxes associated with the Reporting Person becoming retirement eligible."}],"balance_after":10660,"derivative":{"underlying":"Common Stock","underlying_shares":88},"source":{"system":"sec-edgar","filing":"0001209191-22-062353","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062353/doc4.xml","form_type":"4"}},{"id":2079042,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","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":"2022-12-21T22:11:10.000Z","date":"2022-12-19","kind":"exercise","acquired":false,"shares":93,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay income taxes associated with the Reporting Person becoming retirement eligible."},{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay income taxes associated with the Reporting Person becoming retirement eligible."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay income taxes associated with the Reporting Person becoming retirement eligible."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay income taxes associated with the Reporting Person becoming retirement eligible."}],"balance_after":8076,"derivative":{"underlying":"Common Stock","underlying_shares":93},"source":{"system":"sec-edgar","filing":"0001209191-22-062353","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062353/doc4.xml","form_type":"4"}},{"id":2079041,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-21T22:11:10.000Z","date":"2022-12-19","kind":"tax_withholding","acquired":false,"shares":88,"price":24.47,"value":2153.36,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay income taxes associated with the Reporting Person becoming retirement eligible."}],"balance_after":2713350,"source":{"system":"sec-edgar","filing":"0001209191-22-062353","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062353/doc4.xml","form_type":"4"}},{"id":2079040,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-21T22:11:10.000Z","date":"2022-12-19","kind":"exercise","acquired":true,"shares":88,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs to pay income taxes associated with the Reporting Person becoming retirement eligible."}],"balance_after":2713438,"source":{"system":"sec-edgar","filing":"0001209191-22-062353","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062353/doc4.xml","form_type":"4"}},{"id":2079039,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-21T22:11:10.000Z","date":"2022-12-19","kind":"tax_withholding","acquired":false,"shares":93,"price":24.47,"value":2275.71,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay income taxes associated with the Reporting Person becoming retirement eligible."}],"balance_after":2713350,"source":{"system":"sec-edgar","filing":"0001209191-22-062353","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062353/doc4.xml","form_type":"4"}},{"id":2079038,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-21T22:11:10.000Z","date":"2022-12-19","kind":"exercise","acquired":true,"shares":93,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay income taxes associated with the Reporting Person becoming retirement eligible."}],"balance_after":2713443,"source":{"system":"sec-edgar","filing":"0001209191-22-062353","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122062353/doc4.xml","form_type":"4"}},{"id":2082331,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-12-19T20:04:04.000Z","date":"2022-12-06","kind":"gift","acquired":false,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By self as Trustee of own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On December 6, 2022, the Trust distributed 1,051,8801 shares of the Issuer's Common Stock to John T. Kim.  The Reporting Person is a co-trustee of the Trust and the father of John T. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 13,464,330 shares of the Issuer's Common Stock, (ii) a trustee of a  trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), which limited liability company holds 164,678 shares of the Issuer's Common stock, (iii) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 3,470,970 shares of the Issuer's Common Stock and (iv) a general partner of a limited partnership which owns 49,594,980 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":"F6","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, or for any other purpose."}],"balance_after":3470970,"source":{"system":"sec-edgar","filing":"0000899243-22-038952","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038952/doc4.xml","form_type":"4"}},{"id":2082330,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-12-19T20:04:04.000Z","date":"2022-12-06","kind":"gift","acquired":false,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By self as Trustee of own GRATs"},"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 Susan Y. Kim.  The Reporting Person is a co-trustee of the Trust and the father of Susan Y. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 13,464,330 shares of the Issuer's Common Stock, (ii) a trustee of a  trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), which limited liability company holds 164,678 shares of the Issuer's Common stock, (iii) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 3,470,970 shares of the Issuer's Common Stock and (iv) a general partner of a limited partnership which owns 49,594,980 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":"F6","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, or for any other purpose."}],"balance_after":4522850,"source":{"system":"sec-edgar","filing":"0000899243-22-038952","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038952/doc4.xml","form_type":"4"}},{"id":2082329,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-12-19T20:04:04.000Z","date":"2022-12-01","kind":"gift","acquired":false,"shares":116500,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim 2018-1 GRAT dtd. 8/29/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 1, 2022, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18 distributed 116,500 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Susan Y. Kim.  Susan Y. Kim and the Reporting Person are the trustees of the trust.  The Reporting Person is the father of Susan Y. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 13,464,330 shares of the Issuer's Common Stock, (ii) a trustee of a  trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), which limited liability company holds 164,678 shares of the Issuer's Common stock, (iii) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 3,470,970 shares of the Issuer's Common Stock and (iv) a general partner of a limited partnership which owns 49,594,980 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":"F6","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, or for any other purpose."}],"balance_after":1379943,"source":{"system":"sec-edgar","filing":"0000899243-22-038952","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038952/doc4.xml","form_type":"4"}},{"id":2199307,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-08-01T18:46:12.000Z","date":"2022-07-12","kind":"gift","acquired":false,"shares":429750,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By SusanY. Kim GRAT dtd. 04/01/20"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 12, 2022, the Qualified Annuity Trust Under the Susan Y. Kim Irrevocable Trust Agreement dtd. 4/1/20 distributed 429,750 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Susan Y. Kim. Susan Y. Kim and the Reporting Person are the trustees of the trust. The Reporting Person is the father of Susan Y. Kim."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of trusts for the benefit of his immediate family members which own 13,580,830 shares of the Issuer's Common Stock, (ii) a trustee of a trust which is a controlling member of a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), which limited liability company holds 164,678 shares of the Issuer's Common stock, (iii) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 6,430,381 shares of the Issuer's Common Stock and (iv) a general partner of a limited partnership which owns 49,594,980 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":"F3","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, or for any other purpose."}],"balance_after":2298355,"source":{"system":"sec-edgar","filing":"0000899243-22-027133","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322027133/doc4.xml","form_type":"4"}},{"id":2294166,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Common Stock","published_at":"2022-04-21T01:04:08.000Z","date":"2021-12-27","kind":"gift","acquired":true,"shares":164678,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (excl. own GRATs & Susan Y. Kim 2018-1 Qualified Annuity Trust dtd. 8/29/18)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 27, 2022, the Reporting Person filed a Form 4 (the \"Original Form 4\") which inadvertently omitted a transaction which resulted in an increase in the indirect holdings of the Reported Person as the trustee of a trust for the benefit of members of the Reporting Person's immediate family.  On December 27, 2021, a transfer of 164,678 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") was made to a limited liability company being treated as a corporation for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\").  The Reporting Person is a trustee of a trust which is a member of such limited liability company.  The beneficiaries of the trust are members of the Reporting Person's immediate family. The trust is being treated as the \"controlling shareholder\" of the limited liability company for purposes of Section 16."},{"field":"shares","element":"transactionShares","label":"F2","text":"(Continued from Footnote 1) Although the above described transfer of shares of the Issuer's Common Stock was not reported on the Original Form 4, such shares were correctly included in the indirect holdings of the Reporting Person on the Original Form 4"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is a trustee of trusts for the benefit of his immediate family members (excluding his own grantor retained annuity trusts and the Qualified Annuity Trust Under the Susan Y. Kim  2018-1 Irrevocable Trust Agreement dtd 8/29/18) which own 12,678,815 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.  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":12678815,"source":{"system":"sec-edgar","filing":"0000899243-22-015250","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322015250/doc4a.xml","form_type":"4/A","original_submission_date":"2022-01-27"}},{"id":2294163,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-04-20T23:12:54.000Z","date":"2022-04-04","kind":"gift","acquired":true,"shares":755000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"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.  Agnes C. Kim is the spouse of the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","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.  Agnes C. Kim is the spouse of the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","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, or for any other purpose."}],"balance_after":2610776,"source":{"system":"sec-edgar","filing":"0000899243-22-015208","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322015208/doc4.xml","form_type":"4"}},{"id":2372737,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-02-25T22:39:27.000Z","date":"2022-02-24","kind":"grant","acquired":true,"shares":10748,"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 February 24, 2022 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an employee of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":1876616,"source":{"system":"sec-edgar","filing":"0001209191-22-013270","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122013270/doc4.xml","form_type":"4"}},{"id":2395044,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-02-15T22:21:03.000Z","date":"2022-02-11","kind":"tax_withholding","acquired":false,"shares":684,"price":20.9,"value":14295.6,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The transaction represents shares withheld by Amkor Technology, Inc. (the \"Issuer\") in connection with the vesting of certain restricted stock units granted to the Reporting Person on February 11, 2021 pursuant to the Issuer's Equity Incentive Plan and the related award agreement.  These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":1865868,"source":{"system":"sec-edgar","filing":"0001209191-22-009839","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919122009839/doc4.xml","form_type":"4"}},{"id":2424300,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-01-28T01:00:08.000Z","date":"2022-01-18","kind":"gift","acquired":false,"shares":125600,"price":23.86,"value":2996816.0,"ownership":{"direct":false,"nature":"By Susan Y. Kim 2018-1 Qualified Annuity Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 18, 2022, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd August 29, 2018 distributed 125,600 shares of the Issuer's Common Stock to Susan Y. Kim.  Susan Y. Kim and the reporting person are the co-trustees of the trust.  The reporting person and Susan Y. Kim are father and daughter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The reporting person is (i) a trustee of family trusts for the benefit of his immediate family members which own 14,175,258 shares of the Issuer's Common Stock, (ii) a trustee of grantor retained annuity trusts of which he was the settlor and is the sole annuitant which own 6,430,381 shares of the Issuer's Common Stock and (iii) a general partner of a limited partnership which owns 49,594,980 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":"F3","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":1496443,"source":{"system":"sec-edgar","filing":"0000899243-22-003493","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322003493/doc4.xml","form_type":"4"}},{"id":2429055,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-01-21T16:38:22.000Z","date":"2021-12-27","kind":"gift","acquired":true,"shares":164678,"price":23.45,"value":3861699.1,"ownership":{"direct":false,"nature":"By Susan Y. Kim 2012 Generation-Skipping Trust"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On December 27, 2021, Susan Y. Kim 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\").  The Susan Y. Kim 2012 Generation-Skipping Trust Dated December 11, 2012 is being treated as a controlling shareholder of Susins, LLC.  The reporting person is a trustee of said trust and members of his immediate family are beneficiaries thereof.  The reporting person's indirect holding of these 164,678 shares of the Issuer's Common Stock was inadvertently omitted from his Form 4 that was filed with the Commission on January 4, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of the shares held by these trusts and partnerships.  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":164678,"source":{"system":"sec-edgar","filing":"0000899243-22-002803","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002803/doc4.xml","form_type":"4"}},{"id":2429054,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-01-21T16:38:22.000Z","date":"2021-10-04","kind":"gift","acquired":false,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":false,"nature":"By James J. Kim 2018-1 GRAT"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","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.  The reporting person and John T. Kim are father and son."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0000899243-22-002803","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002803/doc4.xml","form_type":"4"}},{"id":2429053,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29209,"kind":"person","name":"KIM JAMES J","position":1,"cik":"0001158839","reported_name":"KIM JAMES J","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-01-21T16:38:22.000Z","date":"2021-10-04","kind":"gift","acquired":false,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":false,"nature":"By James J. Kim 2018-1 GRAT"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","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 Susan Y. Kim.  The reporting person and Susan Y. Kim are the co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"Pursuant to the Form 4 instructions, the reporting person is being treated as having a pecuniary interest in all of the shares held by these trusts and partnerships.  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":"0000899243-22-002803","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002803/doc4.xml","form_type":"4"}}],"next_cursor":"2022-01-21T16:38:22.000000Z,2429053"}