{"transactions":[{"id":901860,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2026-02-17T21:21:03.000Z","date":"2026-02-12","kind":"sale","planned":false,"acquired":false,"shares":10000000,"price":48.49,"value":484900000.0,"ownership":{"direct":false,"nature":"By 915 Investments, LP"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 12, 2026, 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 is (i) a trustee of family trusts for the benefit of his immediate family members (other than Grantor Retained Annuity Trusts (\"GRATS\") which own 9,846,944 shares of the Issuer's Common Stock, (ii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,253,250 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock (iv) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(continued from Footnote 2) (v) a general partner of a limited partnership which owns 29,594,980 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":29594980,"source":{"system":"sec-edgar","filing":"0001158926-26-000003","document":"wk-form4_1771363260.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892626000003/wk-form4_1771363260.xml","form_type":"4"}},{"id":957520,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-12-30T21:40:03.000Z","date":"2025-12-26","kind":"gift","planned":false,"acquired":true,"shares":725000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. 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 James J. Kim are co-trustees of the Susan Y. Kim 2023 Family Distribution Trust."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The Reporting Person is (i) a trustee of family trusts for the benefit of his immediate family members (other than Grantor Retained Annuity Trusts (\"GRATS\") which own 9,846,944 shares of the Issuer's Common Stock, (ii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 1,253,250 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock (iv) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F3","text":"(continued from Footnote 2) (v) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":9846944,"source":{"system":"sec-edgar","filing":"0001158926-25-000014","document":"wk-form4_1767130800.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000014/wk-form4_1767130800.xml","form_type":"4"}},{"id":1006072,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-11-06T23:29:45.000Z","date":"2025-11-04","kind":"gift","planned":false,"acquired":false,"shares":40750,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On November 4, 2025, the John T. Kim 2024 GRAT #2 dtd. 08/09/2024 distributed 40,750 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Reporting Person. The Reporting Person is the sole trustee of the John T. Kim 2024 GRAT #2 dtd. 08/09/2024. Because the Reporting Person is the annuitant and sole trustee of the John T. Kim 2024 GRAT #2  dtd. 08/09/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":1253250,"source":{"system":"sec-edgar","filing":"0001158926-25-000012","document":"wk-form4_1762471782.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000012/wk-form4_1762471782.xml","form_type":"4"}},{"id":1006071,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-11-06T23:29:45.000Z","date":"2025-11-04","kind":"gift","planned":false,"acquired":false,"shares":806000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On November 4, 2025, the John T. Kim 2024 GRAT #1 dtd. 08/09/2024 distributed 806,000 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Reporting Person. The Reporting Person is the sole trustee of the John T. Kim 2024 GRAT #1 dtd. 08/09/2024. Because the Reporting Person is the annuitant and sole trustee of the John T. Kim 2024 GRAT #1 dtd. 08/09/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":1294000,"source":{"system":"sec-edgar","filing":"0001158926-25-000012","document":"wk-form4_1762471782.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000012/wk-form4_1762471782.xml","form_type":"4"}},{"id":1006070,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-11-06T23:29:45.000Z","date":"2025-11-04","kind":"gift","planned":false,"acquired":true,"shares":40750,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"On November 4, 2025, the John T. Kim 2024 GRAT #2 dtd. 08/09/2024 distributed 40,750 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Reporting Person. The Reporting Person is the sole trustee of the John T. Kim 2024 GRAT #2 dtd. 08/09/2024. Because the Reporting Person is the annuitant and sole trustee of the John T. Kim 2024 GRAT #2  dtd. 08/09/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":5594489,"source":{"system":"sec-edgar","filing":"0001158926-25-000012","document":"wk-form4_1762471782.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000012/wk-form4_1762471782.xml","form_type":"4"}},{"id":1006069,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-11-06T23:29:45.000Z","date":"2025-11-04","kind":"gift","planned":false,"acquired":true,"shares":806000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"On November 4, 2025, the John T. Kim 2024 GRAT #1 dtd. 08/09/2024 distributed 806,000 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Reporting Person. The Reporting Person is the sole trustee of the John T. Kim 2024 GRAT #1 dtd. 08/09/2024. Because the Reporting Person is the annuitant and sole trustee of the John T. Kim 2024 GRAT #1 dtd. 08/09/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":5553739,"source":{"system":"sec-edgar","filing":"0001158926-25-000012","document":"wk-form4_1762471782.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000012/wk-form4_1762471782.xml","form_type":"4"}},{"id":1075176,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-08-05T23:16:16.000Z","date":"2025-08-01","kind":"purchase","planned":false,"acquired":true,"shares":441589,"price":21.85,"value":9648719.65,"ownership":{"direct":false,"nature":"By Sujoda Investments, LP"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On August 1, 2025, James J. Kim distributed 441,589 shares of the Common Stock of the Issuer to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F5","text":"The Reporting Person is (i) a trustee of family trusts for the benefit of his immediate family members (other than Grantor Retained Annuity Trusts (\"GRATS\") which own 9,121,944 shares of the Issuer's Common Stock, (ii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,100,000 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock (iv)  a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock"},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F6","text":"(continued from Footnote 5) (v) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F7","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":3789479,"source":{"system":"sec-edgar","filing":"0001158926-25-000009","document":"wk-form4_1754435774.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000009/wk-form4_1754435774.xml","form_type":"4"}},{"id":1075175,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-08-05T23:16:16.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":true,"shares":280001,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,001 shares of the Common Stock of the Issuer to the Reporting Person."}],"balance_after":4747739,"source":{"system":"sec-edgar","filing":"0001158926-25-000009","document":"wk-form4_1754435774.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000009/wk-form4_1754435774.xml","form_type":"4"}},{"id":1075174,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2025-08-05T23:16:16.000Z","date":"2025-08-01","kind":"gift","planned":false,"acquired":true,"shares":438002,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On August 1, 2025, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."}],"balance_after":4467738,"source":{"system":"sec-edgar","filing":"0001158926-25-000009","document":"wk-form4_1754435774.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000009/wk-form4_1754435774.xml","form_type":"4"}},{"id":1243876,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2025-02-26T22:18:37.000Z","date":"2025-02-24","kind":"purchase","planned":false,"acquired":true,"shares":869565,"price":21.85,"value":18999995.25,"ownership":{"direct":false,"nature":"By Sujoda Investments, LP"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 24, 2025, James J. Kim distributed 869,565 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person is (i) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,100,000 shares of the Issuer's Common Stock; (ii) a trustee of family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock; (iii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock; (v) as referenced in Footnote 3, a member of Sujoda Management, LLC, which indirectly owns 3,347,890 shares of the Issuer's Common Stock and (vi) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":3347890,"source":{"system":"sec-edgar","filing":"0001158926-25-000004","document":"wk-form4_1740608311.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000004/wk-form4_1740608311.xml","form_type":"4"}},{"id":1298119,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2025-01-22T22:05:43.000Z","date":"2025-01-17","kind":"gift","planned":false,"acquired":true,"shares":274000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 17, 2025, the James J. Kim 2021 Qualified Annuity Trust U/A dated 12/15/2021 distributed 274,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person. Susan Y. Kim and James J. Kim are co-trustees of the trust."}],"balance_after":4029736,"source":{"system":"sec-edgar","filing":"0001158926-25-000002","document":"wk-form4_1737583535.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892625000002/wk-form4_1737583535.xml","form_type":"4"}},{"id":1436246,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-08-12T21:19:06.000Z","date":"2024-08-09","kind":"gift","planned":false,"acquired":true,"shares":2100000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own GRATs"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 9, 2024, the Reporting Person distributed 2,000,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the John T. Kim GRAT #1 dtd. 8/9/2024 and 100,000 shares of the Issuer's Common Stock to the John T. Kim GRAT #2 dtd. 8/9/2024. Because the Reporting Person is the annuitant and sole trustee of both trusts, such distributions were a mere change in the form of ownership from direct to indirect and thus being voluntarily reported by the Reporting Person on this Form 4."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock; (ii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,100,000 shares of the Issuer's Common Stock; (iii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (v) as referenced in footnote 4, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":2100000,"source":{"system":"sec-edgar","filing":"0001158926-24-000002","document":"wk-form4_1723497540.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892624000002/wk-form4_1723497540.xml","form_type":"4"}},{"id":1436245,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-08-12T21:19:06.000Z","date":"2024-08-09","kind":"gift","planned":false,"acquired":false,"shares":2100000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 9, 2024, the Reporting Person distributed 2,000,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the John T. Kim GRAT #1 dtd. 8/9/2024 and 100,000 shares of the Issuer's Common Stock to the John T. Kim GRAT #2 dtd. 8/9/2024. Because the Reporting Person is the annuitant and sole trustee of both trusts, such distributions were a mere change in the form of ownership from direct to indirect and thus being voluntarily reported by the Reporting Person on this Form 4."}],"balance_after":3755736,"source":{"system":"sec-edgar","filing":"0001158926-24-000002","document":"wk-form4_1723497540.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115892624000002/wk-form4_1723497540.xml","form_type":"4"}},{"id":1699665,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:12.000Z","date":"2023-12-26","kind":"gift","planned":false,"acquired":true,"shares":972920,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 26, 2023, the Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement dated 12/6/2020 (the \"ACK Trust\") distributed 972,920 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person. Susan Y. Kim is the sole trustee of the ACK Trust."}],"balance_after":5855736,"source":{"system":"sec-edgar","filing":"0001209191-23-059789","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059789/doc4.xml","form_type":"4"}},{"id":1739545,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":false,"shares":3341120,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F9","text":"On November 14, 2023, the Family Trust Under the Susan Y. Kim 2012 Irrevocable Trust Agreement dtd. 7/26/12 (the \"SYK 2012 Family Trust\") distributed 3,341,120 shares of the Issuer's Common Stock to KCP LLC. Because the Reporting Person and Susan Y. Kim are the managers of KCP LLC and  co-trustees of the SYK 2012 Family Trust, such distribution was a mere change in the form of ownership and is being voluntarily reported by the Reporting Person on this Form 4."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":9121944,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739544,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":3341120,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F9","text":"On November 14, 2023, the Family Trust Under the Susan Y. Kim 2012 Irrevocable Trust Agreement dtd. 7/26/12 (the \"SYK 2012 Family Trust\") distributed 3,341,120 shares of the Issuer's Common Stock to KCP LLC. Because the Reporting Person and Susan Y. Kim are the managers of KCP LLC and  co-trustees of the SYK 2012 Family Trust, such distribution was a mere change in the form of ownership and is being voluntarily reported by the Reporting Person on this Form 4."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":16710668,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739543,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":1211193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F8","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 KCP LLC. The Reporting Person and Susan Y. Kim are the managers of KCP LLC."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":13369548,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739542,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":1958355,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F7","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 Issuer's Common Stock to KCP LLC. The Reporting Person and Susan Y. Kim are the managers of KCP LLC."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":12158355,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739541,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":2733334,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F6","text":"On November 14, 2023, Dylan Investments, LLC distributed 2,733,334 shares of the Issuer's Common Stock to KCP LLC. The Reporting Person and Susan Y. Kim are the managers of KCP LLC."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":10200000,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739540,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":2733333,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F5","text":"On November 14, 2023, Jacqueline Investments, LLC distributed 2,733,333 shares of the Issuer's Common Stock to KCP LLC. The Reporting Person and Susan Y. Kim are the managers of KCP LLC."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":7466666,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739539,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":2733333,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On November 14, 2023, Alexandra Investments, LLC distributed 2,733,333 shares of the Issuer's Common Stock to KCP LLC. The Reporting Person and Susan Y. Kim are the managers of KCP LLC."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":4733333,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1739538,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:23.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":true,"shares":2000000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Kim Capital Partners - KCP, LLC"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 14, 2023, Susan Y. Kim distributed 2,000,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Kim Capital Partners - KCP, LLC (\"KCP LLC\"). The Reporting Person and Susan Y. Kim are the managers of KCP LLC."},{"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 family trusts for the benefit of his immediate family members which own 9,121,944 shares of the Issuer's Common Stock,(ii) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 10, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":2000000,"source":{"system":"sec-edgar","filing":"0001209191-23-055588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055588/doc4.xml","form_type":"4"}},{"id":1820617,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-07-31T22:00:11.000Z","date":"2023-07-27","kind":"gift","planned":false,"acquired":true,"shares":498232,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 27, 2023, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"JTK Trust\") transferred 498,232 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"Family Trust\"). John T. Kim and Susan Y. Kim are co-trustees of the JTK Trust and the Family Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of family trusts for the benefit of his immediate family members which own 12,463,064 shares of the Issuer's Common Stock, (ii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iii) as referenced in footnote 4, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":12463064,"source":{"system":"sec-edgar","filing":"0001209191-23-043875","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043875/doc4.xml","form_type":"4"}},{"id":1820616,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-07-31T22:00:11.000Z","date":"2023-07-27","kind":"gift","planned":false,"acquired":false,"shares":498232,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By own 2018 GRAT dtd 2/6/18"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 27, 2023, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"JTK Trust\") transferred 498,232 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Family Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"Family Trust\"). John T. Kim and Susan Y. Kim are co-trustees of the JTK Trust and the Family Trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-043875","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043875/doc4.xml","form_type":"4"}},{"id":1822337,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:26.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":true,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 25, 2023, the Qualified Annuity Trust under the James J. Kim 2020-1 Annuity Trust Agreement dated 4/1/20 (the \"JJK Trust\") distributed 443,811 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person. James J. Kim and Susan Y. Kim are co-trustees of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On April 25, 2023, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18 (the \"JTK Trust\") distributed 255,000 shares of the Issuer's Common Stock to the Reporting Person. Because the Reporting Person is the annuitant and a trustee of the JTK 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."}],"balance_after":4882816,"source":{"system":"sec-edgar","filing":"0001209191-23-043574","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043574/doc4.xml","form_type":"4"}},{"id":1993892,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-02-25T00:08:00.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of a grantor retained annuity trust of which he was the settlor and is the sole annuitant which owns 753,232 shares of the Issuer's Common Stock, (ii) a trustee of family trusts for the benefit of his immediate family members which own 11,964,832 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 8, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim, Settlor, FBO Jason Lee Kim dated 11/17/03 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and Susan Y. Kim are co-trustees of such trust."}],"balance_after":11964832,"source":{"system":"sec-edgar","filing":"0001209191-23-012911","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012911/doc4.xml","form_type":"4"}},{"id":1993891,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-02-25T00:08:00.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of a grantor retained annuity trust of which he was the settlor and is the sole annuitant which owns 753,232 shares of the Issuer's Common Stock, (ii) a trustee of family trusts for the benefit of his immediate family members which own 11,964,832 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 8, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and Susan Y. Kim are co-trustees of such trust."}],"balance_after":12348832,"source":{"system":"sec-edgar","filing":"0001209191-23-012911","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012911/doc4.xml","form_type":"4"}},{"id":1993890,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-02-25T00:08:00.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of a grantor retained annuity trust of which he was the settlor and is the sole annuitant which owns 753,232 shares of the Issuer's Common Stock, (ii) a trustee of family trusts for the benefit of his immediate family members which own 11,964,832 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 8, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and Susan Y. Kim are co-trustees of such trust."}],"balance_after":12732832,"source":{"system":"sec-edgar","filing":"0001209191-23-012911","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012911/doc4.xml","form_type":"4"}},{"id":1993889,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-02-25T00:08:00.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of a grantor retained annuity trust of which he was the settlor and is the sole annuitant which owns 753,232 shares of the Issuer's Common Stock, (ii) a trustee of family trusts for the benefit of his immediate family members which own 11,964,832 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 8, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94 transferred 384,000 shares of the Issuer's Common Stock in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and Susan Y. Kim are co-trustees of such trust."}],"balance_after":13116832,"source":{"system":"sec-edgar","filing":"0001209191-23-012911","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012911/doc4.xml","form_type":"4"}},{"id":1993888,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (9)"}}],"security":"Common Stock","published_at":"2023-02-25T00:08:00.000Z","date":"2023-02-22","kind":"sale","acquired":false,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By trusts (other than GRAT & Rev. Trust)"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92 transferred 384,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") in full payment of the principal and accrued interest of a note payable to James J. Kim by such trust. The Reporting Person and Susan Y. Kim are co-trustees of such trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The Reporting Person is (i) a trustee of a grantor retained annuity trust of which he was the settlor and is the sole annuitant which owns 753,232 shares of the Issuer's Common Stock, (ii) a trustee of family trusts for the benefit of his immediate family members which own 11,964,832 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock and (iv) as referenced in footnote 8, a member of Sujoda Management, LLC, which indirectly owns 2,478,325 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares."}],"balance_after":13500832,"source":{"system":"sec-edgar","filing":"0001209191-23-012911","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012911/doc4.xml","form_type":"4"}},{"id":2082327,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2022-12-19T11:06:18.000Z","date":"2022-12-06","kind":"gift","acquired":true,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 6, 2022, the James J. Kim 2019-1 Qualified Annuity Trust U/A dated 9/10/19 distributed 1,051,880 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On June 23, 2022, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated February 6, 2018 distributed 274,900 shares of the Issuer's Common Stock to the Reporting Person.  This distribution resulted in a mere change in the form of ownership of such shares by the Reporting Person from indirect to direct and hence was not a reportable transaction.  The directly owned shares include 7,594,001shares of the Issuer's Common Stock owned by the John T. Kim Trust dated December 31, 1987, a revocable trust of which the Reporting Person is the settlor, sole current beneficiary and sole trustee."}],"balance_after":4184005,"source":{"system":"sec-edgar","filing":"0000899243-22-038927","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038927/doc4.xml","form_type":"4"}},{"id":2340248,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Director stock option (right to buy)","published_at":"2022-03-11T01:33:18.000Z","date":"2022-03-08","kind":"exercise","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"This stock option to acquire 20,000 shares of the Issuer's Common Stock at a price of $7.31 per share was granted on May 15, 2019 and vested 100% on May 15, 2020."}],"balance_after":0,"derivative":{"exercise_price":7.31,"exercise_date":"2020-05-15","expiration_date":"2022-05-19","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000899243-22-010588","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322010588/doc4.xml","form_type":"4"}},{"id":2340247,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Director stock option (right to buy)","published_at":"2022-03-11T01:33:18.000Z","date":"2022-03-08","kind":"exercise","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"This stock option to acquire 20,000 shares of the Issuer's Common Stock at a price of $9.17 per share was granted on May 13, 2014 and vested 100% on May 13, 2015."}],"balance_after":0,"derivative":{"exercise_price":9.17,"exercise_date":"2015-05-13","expiration_date":"2022-05-19","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000899243-22-010588","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322010588/doc4.xml","form_type":"4"}},{"id":2340246,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Director stock option (right to buy)","published_at":"2022-03-11T01:33:18.000Z","date":"2022-03-08","kind":"exercise","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"This stock option (the \"2013 Option\") to acquire 20,000 shares of the Issuer's Common Stock at a price of $4.50 per share was granted on May 8, 2013 (the \"2013 Grant Date\") and vested one-third (1/3) on the first anniversary of the 2013 Grant Date and two-thirds (2/3) on the second anniversary of the 2013 Grant Date, such that 100% of the 2013 Option vested on May 8, 2015."}],"balance_after":0,"derivative":{"exercise_price":4.5,"exercise_date":"2014-05-08","expiration_date":"2022-05-19","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000899243-22-010588","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322010588/doc4.xml","form_type":"4"}},{"id":2340245,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Director stock option (right to buy)","published_at":"2022-03-11T01:33:18.000Z","date":"2022-03-08","kind":"exercise","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"This stock option (the \"2012 Option\") to acquire 20,000 shares of the Issuer's Common Stock at a price of $4.58 per share was granted on May 8, 2012 (the \"2012 Grant Date\") and vested in equal annual installments over three years beginning on the first anniversary of the 2012 Grant Date, such that 100% of the 2012 Option vested on May 8, 2015."}],"balance_after":0,"derivative":{"exercise_price":4.58,"exercise_date":"2013-05-08","expiration_date":"2022-05-08","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000899243-22-010588","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322010588/doc4.xml","form_type":"4"}},{"id":2340244,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (8)"}}],"security":"Common Stock","published_at":"2022-03-11T01:33:18.000Z","date":"2022-03-08","kind":"exercise","acquired":true,"shares":80000,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"This stock option (the \"2012 Option\") to acquire 20,000 shares of the Issuer's Common Stock at a price of $4.58 per share was granted on May 8, 2012 (the \"2012 Grant Date\") and vested in equal annual installments over three years beginning on the first anniversary of the 2012 Grant Date, such that 100% of the 2012 Option vested on May 8, 2015."},{"field":"price","element":"transactionPricePerShare","label":"F5","text":"This stock option (the \"2013 Option\") to acquire 20,000 shares of the Issuer's Common Stock at a price of $4.50 per share was granted on May 8, 2013 (the \"2013 Grant Date\") and vested one-third (1/3) on the first anniversary of the 2013 Grant Date and two-thirds (2/3) on the second anniversary of the 2013 Grant Date, such that 100% of the 2013 Option vested on May 8, 2015."},{"field":"price","element":"transactionPricePerShare","label":"F6","text":"This stock option to acquire 20,000 shares of the Issuer's Common Stock at a price of $9.17 per share was granted on May 13, 2014 and vested 100% on May 13, 2015."},{"field":"price","element":"transactionPricePerShare","label":"F7","text":"This stock option to acquire 20,000 shares of the Issuer's Common Stock at a price of $7.31 per share was granted on May 15, 2019 and vested 100% on May 15, 2020."}],"balance_after":2857225,"source":{"system":"sec-edgar","filing":"0000899243-22-010588","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322010588/doc4.xml","form_type":"4"}},{"id":2429051,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-01-21T16:21:06.000Z","date":"2021-10-04","kind":"gift","acquired":true,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to the reporting person."}],"balance_after":2777225,"source":{"system":"sec-edgar","filing":"0000899243-22-002798","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002798/doc4.xml","form_type":"4"}},{"id":2450611,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-01-04T20:43:13.000Z","date":"2021-12-30","kind":"sale","acquired":false,"shares":1337332,"price":24.68,"value":33005353.76,"ownership":{"direct":false,"nature":"By limited partnerships"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On December 30, 2021, Sujoda Investments, LP transferred 668,666 shares of the Issuer's Common Stock to Agnes C. Kim and 668,666 shares of the Issuer's Common Stock to James J. Kim in partial payment of the principal of a joint Note."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The reporting person is one of three members of Sujoda Management, LLC.  Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), and, pursuant to the Form 4 instructiions, the reporting person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the reporting person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person is (i) a trustee of family trusts for the benefit of his immediate family members which own 13,884,832 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 1,028,132 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's Common Stock and (iv) a manager of a limited liability company being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's Common Stock.  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":21963134,"source":{"system":"sec-edgar","filing":"0000899243-22-000442","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322000442/doc4.xml","form_type":"4"}},{"id":2450610,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-01-04T20:43:13.000Z","date":"2021-12-30","kind":"sale","acquired":false,"shares":1187087,"price":24.68,"value":29297307.16,"ownership":{"direct":false,"nature":"By limited partnerships"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On December 30, 2021, Sujoda Investments, LP transferred 1,187,087 shares of the Issuer's Common Stock to James J. Kim in payment of the principal of a Note."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The reporting person is one of three members of Sujoda Management, LLC.  Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), and, pursuant to the Form 4 instructiions, the reporting person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the reporting person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person is (i) a trustee of family trusts for the benefit of his immediate family members which own 13,884,832 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 1,028,132 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's Common Stock and (iv) a manager of a limited liability company being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's Common Stock.  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":23300466,"source":{"system":"sec-edgar","filing":"0000899243-22-000442","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322000442/doc4.xml","form_type":"4"}},{"id":2450609,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Member of 10% owner group (7)"}}],"security":"Common Stock","published_at":"2022-01-04T20:43:13.000Z","date":"2021-12-30","kind":"sale","acquired":false,"shares":1187087,"price":24.68,"value":29297307.16,"ownership":{"direct":false,"nature":"By limited partnerships"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 30, 2021, Sujoda Investments, LP transferred 1,187,087 shares of the Issuer's Common Stock to Agnes C. Kim in payment of the principal of a Note."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The reporting person is one of three members of Sujoda Management, LLC.  Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), and, pursuant to the Form 4 instructiions, the reporting person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the reporting person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person is (i) a trustee of family trusts for the benefit of his immediate family members which own 13,884,832 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 1,028,132 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership which owns 19,484,809 shares of the Issuer's Common Stock and (iv) a manager of a limited liability company being treated as a limited partnership for purposes of Section 16 which owns 2,478,325 shares of the Issuer's Common Stock.  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":24487553,"source":{"system":"sec-edgar","filing":"0000899243-22-000442","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322000442/doc4.xml","form_type":"4"}},{"id":2733313,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Stock option (right to buy)","published_at":"2021-05-04T02:00:07.000Z","date":"2021-05-03","kind":"other","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 3, 2021, John T. Kim exercised options to purchase 20,000 shares of the Issuer's Common Stock."}],"balance_after":0,"derivative":{"exercise_price":6.46,"exercise_date":"2014-05-03","expiration_date":"2021-05-03","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0000899243-21-017983","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321017983/doc4.xml","form_type":"4"}},{"id":2733312,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-05-04T02:00:07.000Z","date":"2021-05-03","kind":"other","acquired":true,"shares":20000,"price":6.46,"value":129200.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 3, 2021, John T. Kim exercised options to purchase 20,000 shares of the Issuer's Common Stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Includes options to acquire 80,000 shares of the Issuer's Common stock."}],"balance_after":9650224,"source":{"system":"sec-edgar","filing":"0000899243-21-017983","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321017983/doc4.xml","form_type":"4"}},{"id":2859987,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-02-16T13:49:00.000Z","date":"2020-03-16","kind":"gift","acquired":true,"shares":15641,"price":7.47,"value":116838.27,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 16, 2020, the James J. Kim Qualified Annuity Trust U/A Dated 10/13/14 distributed 15,641 shares of the Issuer's Common Stock to each of Susan Y. Kim, John T. Kim and David D. Kim.  James J. Kim and Susan Y. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On July 1, 2020, 278,833 shares of the Issuer's Common Stock were distributed by the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement Dated February 6, 2018 to the reporting person. Susan Y. Kim and John T. Kim are co-trustees of the trust. The aforementioned trust from which the reporting person received such shares is a grantor retained annuity trust of which the reporting person is the settlor, the sole current beneficiary and a co-trustee.  Pursuant to the Form 5 instructions, in his capacity as a co-trustee of the trust, the reporting person is being treated as having a pecuniary interest in all of the shares held by such trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"(Continued From Footnote 2) Accordingly, the transfer between the reporting person and such trust results in a mere change from indirect ownership to direct ownership.  Such transfer is therefore not reported on this Form 5. On December 31, 2020, such grantor retained annuity trusts created by the reporting person held 1,202,942 shares of the Issuer's Common Stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Includes options to acquire 100,000 shares of the Issuer's Common Stock."}],"balance_after":2056223,"source":{"system":"sec-edgar","filing":"0000899243-21-006549","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321006549/doc5.xml","form_type":"5"}},{"id":2936486,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-12-21T20:04:05.000Z","date":"2020-12-17","kind":"sale","acquired":false,"shares":816613,"price":15.41,"value":12584006.33,"ownership":{"direct":false,"nature":"By Self as Trustee"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Alexandra Kim Panichello & Descendants transferred 816,613 shares of Common Stock to Agnes C. Kim in payment of a Note. John T. Kim and Susan Y. Kim are co-trustees of the trust."}],"balance_after":42597108,"source":{"system":"sec-edgar","filing":"0000899243-20-034677","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320034677/doc4.xml","form_type":"4"}},{"id":2936485,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-12-21T20:04:05.000Z","date":"2020-12-17","kind":"sale","acquired":false,"shares":816613,"price":15.41,"value":12584006.33,"ownership":{"direct":false,"nature":"By Self as Trustee"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Dylan James Panichello & Descendants transferred 816,613 shares of Common Stock to Agnes C. Kim in payment of a Note. John T. Kim and Susan Y. Kim are co-trustees of the trust."}],"balance_after":43413721,"source":{"system":"sec-edgar","filing":"0000899243-20-034677","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320034677/doc4.xml","form_type":"4"}},{"id":2936484,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-12-21T20:04:05.000Z","date":"2020-12-17","kind":"sale","acquired":false,"shares":816613,"price":15.41,"value":12584006.33,"ownership":{"direct":false,"nature":"By Self as Trustee"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Jacqueline Mary Panichello & Descendants transferred 816,613 shares of Common Stock to Agnes C. Kim in payment of a Note. John T. Kim and Susan Y. Kim are co-trustees of the trust."}],"balance_after":44230334,"source":{"system":"sec-edgar","filing":"0000899243-20-034677","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320034677/doc4.xml","form_type":"4"}},{"id":2936483,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-12-21T20:04:05.000Z","date":"2020-12-17","kind":"sale","acquired":false,"shares":1633226,"price":15.41,"value":25168012.66,"ownership":{"direct":false,"nature":"By Self as Trustee"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Descendants of John T. Kim transferred 1,633,226 shares of Common Stock to Agnes C. Kim in payment of a Note. John T. Kim and Susan Y. Kim are co-trustees of the trust."}],"balance_after":45046947,"source":{"system":"sec-edgar","filing":"0000899243-20-034677","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320034677/doc4.xml","form_type":"4"}},{"id":3051361,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Employee Stock Option","published_at":"2020-08-20T20:31:19.000Z","date":"2020-08-18","kind":"exercise","acquired":false,"shares":54687,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":9.48,"exercise_date":"2020-08-18","expiration_date":"2020-08-19","underlying":"Common Stock","underlying_shares":54687},"source":{"system":"sec-edgar","filing":"0000899243-20-023035","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320023035/doc4.xml","form_type":"4"}},{"id":3051360,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Employee Stock Option","published_at":"2020-08-20T20:31:19.000Z","date":"2020-08-18","kind":"exercise","acquired":false,"shares":131250,"price":0,"value":0.0,"ownership":{"direct":true},"balance_after":0,"derivative":{"exercise_price":9.86,"exercise_date":"2020-08-18","expiration_date":"2020-08-19","underlying":"Common Stock","underlying_shares":131250},"source":{"system":"sec-edgar","filing":"0000899243-20-023035","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320023035/doc4.xml","form_type":"4"}},{"id":3051359,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-08-20T20:31:19.000Z","date":"2020-08-18","kind":"exercise","acquired":true,"shares":54687,"price":13.67,"value":747571.29,"ownership":{"direct":true},"balance_after":1956223,"source":{"system":"sec-edgar","filing":"0000899243-20-023035","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320023035/doc4.xml","form_type":"4"}},{"id":3051358,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":false,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-08-20T20:31:19.000Z","date":"2020-08-18","kind":"exercise","acquired":true,"shares":131250,"price":13.67,"value":1794187.5,"ownership":{"direct":true},"balance_after":1901536,"source":{"system":"sec-edgar","filing":"0000899243-20-023035","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320023035/doc4.xml","form_type":"4"}},{"id":3166632,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Director Stock Option (Right-to-Buy)","published_at":"2020-04-30T17:22:50.000Z","date":"2020-04-28","kind":"exercise","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"These options vest over three years: 1/3 of the option shares become exercisable on each of the first three anniversaries of the grant date."}],"balance_after":0,"derivative":{"exercise_price":7.71,"exercise_date":"2011-05-03","expiration_date":"2020-05-03","underlying":"Common Stock","underlying_shares":20000},"source":{"system":"sec-edgar","filing":"0001209191-20-026252","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919120026252/doc4.xml","form_type":"4"}},{"id":3166631,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, 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Kim 2015 Irrevocable Trust U/A Dated March 16, 2015 distributed 800,000 shares of the Issuer's Common Stock to Susan Y. Kim.  Susan Y. Kim and John T. Kim are co-trustees 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, or for any other purpose."}],"balance_after":47485506,"source":{"system":"sec-edgar","filing":"0000899243-20-004602","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320004602/doc5.xml","form_type":"5"}},{"id":3271350,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-02-14T17:01:20.000Z","date":"2019-04-29","kind":"other","acquired":true,"shares":308000,"price":9.15,"value":2818200.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On April 29, 2019, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18 distributed 308,000 shares of the Issuer's Common Stock to John T. Kim. Susan Y. Kim and John T. Kim are co-trustees 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, or for any other purpose."}],"balance_after":27405452,"source":{"system":"sec-edgar","filing":"0000899243-20-004602","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320004602/doc5.xml","form_type":"5"}},{"id":3271349,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2020-02-14T17:01:20.000Z","date":"2019-04-29","kind":"other","acquired":false,"shares":308000,"price":9.15,"value":2818200.0,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On April 29, 2019, the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement Dated 2/6/18 distributed 308,000 shares of the Issuer's Common Stock to John T. Kim. Susan Y. Kim and John T. Kim are co-trustees 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, or for any other purpose."}],"balance_after":47485506,"source":{"system":"sec-edgar","filing":"0000899243-20-004602","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924320004602/doc5.xml","form_type":"5"}},{"id":3506610,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Director Stock Option (Right to Buy)","published_at":"2019-05-31T20:56:38.000Z","date":"2019-05-15","kind":"grant","acquired":false,"shares":20000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"These options which vest 100% on the earlier of the first anniversary of the grant date, or the date of the first annual meeting of stockholders following the grant date"}],"balance_after":20000,"derivative":{"exercise_price":7.31,"expiration_date":"2029-05-15","underlying":"Amkor Technology, Inc. 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Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 1,139,605 shares of the Issuer's Common Stock to John T. Kim.  James J. Kim and Susan Y. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"This Form 5 amends the Form 5 filed by the reporting person on February 14, 2019.  This amendment is to correct the direct holdings of the reporting person only. For readability, the entire filing is being amended but only those line item noted with footnote 8 have been changed, and solely to update the direct holdings in Column 5."}],"balance_after":26814245,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580049,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-08-16","kind":"other","acquired":false,"shares":560450,"price":8.9,"value":4988005.0,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"On August 16, 2018, the Susan Y. Kim 2015 Irrevocable Trust U/A Dated 3/16/15 distributed 560,450 shares of the Company's Common Stock to Susan Y. Kim.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580048,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-07-09","kind":"other","acquired":true,"shares":7828682,"price":8.85,"value":69283835.7,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"On July 9, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 7,828,682 shares of the Issuer's Common Stock to the Family Trust under the John T. Kim 2012 Irrevocable Trust dated 12/11/12.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580047,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-07-09","kind":"other","acquired":false,"shares":7828682,"price":8.85,"value":69283835.7,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"On July 9, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 7,828,682 shares of the Issuer's Common Stock to the Family Trust under the John T. Kim 2012 Irrevocable Trust dated 12/11/12.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580046,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-04-04","kind":"other","acquired":true,"shares":2138382,"price":9.63,"value":20592618.66,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On April 4, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 2,138,382 shares of the Issuer's Common Stock to John T. Kim.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"This Form 5 amends the Form 5 filed by the reporting person on February 14, 2019.  This amendment is to correct the direct holdings of the reporting person only. For readability, the entire filing is being amended but only those line item noted with footnote 8 have been changed, and solely to update the direct holdings in Column 5."}],"balance_after":26814245,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580045,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-04-04","kind":"other","acquired":false,"shares":2138382,"price":9.63,"value":20592618.66,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On April 4, 2018, the John T. 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Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580044,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-03-23","kind":"other","acquired":true,"shares":1789775,"price":10.64,"value":19043206.0,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On March 23, 2018, John T. Kim transferred 1,789,775 shares of the Issuer's Common Stock to the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18. Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580043,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-03-23","kind":"other","acquired":false,"shares":1789775,"price":10.64,"value":19043206.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On March 23, 2018, John T. Kim transferred 1,789,775 shares of the Issuer's Common Stock to the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18. Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F8","text":"This Form 5 amends the Form 5 filed by the reporting person on February 14, 2019.  This amendment is to correct the direct holdings of the reporting person only. For readability, the entire filing is being amended but only those line item noted with footnote 8 have been changed, and solely to update the direct holdings in Column 5."}],"balance_after":26814245,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580042,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-03-13","kind":"other","acquired":true,"shares":2779777,"price":11.42,"value":31745053.34,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 13, 2018, the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12 distributed 2,779,777 shares to the Susan Y. Kim Family Trust under the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3580041,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-03-25T13:00:22.000Z","date":"2018-03-13","kind":"other","acquired":false,"shares":2779777,"price":11.42,"value":31745053.34,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 13, 2018, the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12 distributed 2,779,777 shares to the Susan Y. Kim Family Trust under the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-008826","document":"doc5a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319008826/doc5a.xml","form_type":"5/A","original_submission_date":"2019-02-14"}},{"id":3646914,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2019-02-20T17:45:15.000Z","date":"2019-02-15","kind":"grant","acquired":true,"shares":175000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option grant vests as follows: 25% of the shares vest on the first anniversary of the grant date and 1/16th of the option vests each quarter thereafter, such that 100% of the option will be vested on the fourth anniversary of the grant date."}],"balance_after":175000,"derivative":{"exercise_price":9.48,"exercise_date":"2020-02-15","expiration_date":"2029-02-15","underlying":"Amkor Technology, Inc., Common Stock","underlying_shares":175000},"source":{"system":"sec-edgar","filing":"0001209191-19-011421","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919119011421/doc4.xml","form_type":"4"}},{"id":3657340,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-10-05","kind":"other","acquired":true,"shares":1139605,"price":7.16,"value":8159571.8,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F6","text":"On October 5, 2018, the James J. Kim 2013 Qualified Annuity Trust U/A Dated 5/17/13 distributed 1,139,605 shares of the Issuer's Common Stock to John T. Kim.  James J. Kim and Susan Y. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":25674640,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":10,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657339,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-08-16","kind":"other","acquired":false,"shares":560450,"price":8.9,"value":4988005.0,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F5","text":"On August 16, 2018, the Susan Y. Kim 2015 Irrevocable Trust U/A Dated 3/16/15 distributed 560,450 shares of the Company's Common Stock to Susan Y. Kim.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657338,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-07-09","kind":"other","acquired":true,"shares":7828682,"price":8.85,"value":69283835.7,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"On July 9, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 7,828,682 shares of the Issuer's Common Stock to the Family Trust under the John T. Kim 2012 Irrevocable Trust dated 12/11/12.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657337,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-07-09","kind":"other","acquired":false,"shares":7828682,"price":8.85,"value":69283835.7,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F4","text":"On July 9, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 7,828,682 shares of the Issuer's Common Stock to the Family Trust under the John T. Kim 2012 Irrevocable Trust dated 12/11/12.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657336,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-04-04","kind":"other","acquired":true,"shares":2138382,"price":9.63,"value":20592618.66,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On April 4, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 2,138,382 shares of the Issuer's Common Stock to John T. Kim.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":25674640,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657335,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-04-04","kind":"other","acquired":false,"shares":2138382,"price":9.63,"value":20592618.66,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On April 4, 2018, the John T. Kim 2012 Irrevocable Trust U/A dated 12/11/12 transferred 2,138,382 shares of the Issuer's Common Stock to John T. Kim.  John T. Kim and James J. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657334,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-03-23","kind":"other","acquired":true,"shares":1789775,"price":10.64,"value":19043206.0,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On March 23, 2018, John T. Kim transferred 1,789,775 shares of the Issuer's Common Stock to the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18. Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657333,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-03-23","kind":"other","acquired":false,"shares":1789775,"price":10.64,"value":19043206.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On March 23, 2018, John T. Kim transferred 1,789,775 shares of the Issuer's Common Stock to the Qualified Annuity Trust under the John T. Kim 2018 Irrevocable Trust Agreement dated 2/6/18. Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":25674640,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657332,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-03-13","kind":"other","acquired":true,"shares":2779777,"price":11.42,"value":31745053.34,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 13, 2018, the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12 distributed 2,779,777 shares to the Susan Y. Kim Family Trust under the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":3657331,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2019-02-14T22:13:36.000Z","date":"2018-03-13","kind":"other","acquired":false,"shares":2779777,"price":11.42,"value":31745053.34,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 13, 2018, the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12 distributed 2,779,777 shares to the Susan Y. Kim Family Trust under the Susan Y. Kim 2012 Irrevocable Trust dated 7/26/12.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F7","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, or for any other purpose."}],"balance_after":48593506,"source":{"system":"sec-edgar","filing":"0000899243-19-003640","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924319003640/doc5.xml","form_type":"5"}},{"id":4059744,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2018-02-14T17:48:44.000Z","date":"2017-11-15","kind":"other","acquired":false,"shares":1661294,"price":10.66,"value":17709394.04,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On November 15, 2017, the Susan Y. Kim 2012 Irrevocable Trust dated July 26, 2012 distributed 1,661,294 shares to Susan Y. Kim.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":49153956,"source":{"system":"sec-edgar","filing":"0000899243-18-003803","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924318003803/doc5.xml","form_type":"5"}},{"id":4059743,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2018-02-14T17:48:44.000Z","date":"2017-08-11","kind":"other","acquired":false,"shares":480540,"price":8.63,"value":4147060.2,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On August 11, 2017, the Susan Y. Kim 2015 Irrevocable Trust U/A Dated March 16, 2015 distributed 480,540 shares of the Company's Common Stock to Susan Y. Kim.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":49153956,"source":{"system":"sec-edgar","filing":"0000899243-18-003803","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924318003803/doc5.xml","form_type":"5"}},{"id":4059742,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2018-02-14T17:48:44.000Z","date":"2017-03-02","kind":"other","acquired":true,"shares":1687829,"price":10.21,"value":17232734.09,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 2, 2017, the John T. Kim Irrevocable Trust U/A Dated 12/11/12 distributed 1,687,829 shares to the John T. Kim Trust of December 31, 1987. John T. Kim and James J. Kim are trustees of the John T. Kim Irrevocable Trust U/A Dated 12/11/12. John T. Kim is the sole trustee of the John T. Kim Trust of December 31, 1987."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":49153956,"source":{"system":"sec-edgar","filing":"0000899243-18-003803","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924318003803/doc5.xml","form_type":"5"}},{"id":4059741,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2018-02-14T17:48:44.000Z","date":"2017-03-02","kind":"other","acquired":false,"shares":1687829,"price":10.21,"value":17232734.09,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On March 2, 2017, the John T. Kim Irrevocable Trust U/A Dated 12/11/12 distributed 1,687,829 shares to the John T. Kim Trust of December 31, 1987. John T. Kim and James J. Kim are trustees of the John T. Kim Irrevocable Trust U/A Dated 12/11/12. John T. Kim is the sole trustee of the John T. Kim Trust of December 31, 1987."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":49153956,"source":{"system":"sec-edgar","filing":"0000899243-18-003803","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924318003803/doc5.xml","form_type":"5"}},{"id":4414792,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2017-03-01T23:39:18.000Z","date":"2017-02-27","kind":"grant","acquired":true,"shares":175000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This option grant vests as follows: 25% of the shares vest on the first anniversary of the grant date and 1/16th of the option vests each quarter thereafter, such that 100% of the option will be vested on the fourth anniversary of the grant date."}],"balance_after":175000,"derivative":{"exercise_price":9.86,"exercise_date":"2018-02-27","expiration_date":"2027-02-27","underlying":"Amkor Technology, Inc., Common Stock","underlying_shares":175000},"source":{"system":"sec-edgar","filing":"0001209191-17-016117","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919117016117/doc4.xml","form_type":"4"}},{"id":4446240,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2017-02-15T20:10:09.000Z","date":"2016-11-03","kind":"other","acquired":false,"shares":1414250,"price":10.4,"value":14708200.0,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"On November 3, 2016, the Susan Y. Kim 2012 Irrevocable Trust U/A Dated 7/26/12 distributed 1,414,250 shares of the Company's Common Stock to Susan Y. Kim.  Susan T. Kim and John T. Kim are trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":25824640,"source":{"system":"sec-edgar","filing":"0000899243-17-004202","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924317004202/doc5.xml","form_type":"5"}},{"id":4446239,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2017-02-15T20:10:09.000Z","date":"2016-07-18","kind":"other","acquired":false,"shares":568780,"price":6.09,"value":3463870.2,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On July 18, 2016, the Susan Y. Kim 2015 Irrevocable Trust U/A Dated 3/16/15 distributed 568,780 shares of the Company's Common Stock to Susan Y. Kim.  Susan Y. Kim and John T. Kim are co-trustees."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":25824640,"source":{"system":"sec-edgar","filing":"0000899243-17-004202","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924317004202/doc5.xml","form_type":"5"}},{"id":4446238,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2017-02-15T20:10:09.000Z","date":"2016-02-01","kind":"other","acquired":true,"shares":2413880,"price":5.96,"value":14386724.8,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 1, 2016, the John T. Kim Irrevocable Trust U/A Dated 12/11/12 distributed 2,413,880 shares to the John T. Kim Trust of December 31, 1987.  John T. Kim and James J. Kim are trustees of the John T. Kim Irrevocable Trust U/A Dated 12/11/12.  John T. Kim is the sole trustee of the John T. Kim Trust of December 31, 1987."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":25824640,"source":{"system":"sec-edgar","filing":"0000899243-17-004202","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924317004202/doc5.xml","form_type":"5"}},{"id":4446237,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2017-02-15T20:10:09.000Z","date":"2016-02-01","kind":"other","acquired":false,"shares":2413880,"price":5.96,"value":14386724.8,"ownership":{"direct":false,"nature":"By self as trustee"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On February 1, 2016, the John T. Kim Irrevocable Trust U/A Dated 12/11/12 distributed 2,413,880 shares to the John T. Kim Trust of December 31, 1987.  John T. Kim and James J. Kim are trustees of the John T. Kim Irrevocable Trust U/A Dated 12/11/12.  John T. Kim is the sole trustee of the John T. Kim Trust of December 31, 1987."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended, or for any other purpose."}],"balance_after":25824640,"source":{"system":"sec-edgar","filing":"0000899243-17-004202","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924317004202/doc5.xml","form_type":"5"}},{"id":4490141,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":66277,"kind":"person","name":"KIM JOHN T","position":1,"cik":"0001158926","reported_name":"KIM JOHN T","relationship":{"director":true,"officer":false,"ten_percent_owner":true,"other":true,"other_text":"See Exhibit 99.1"}}],"security":"Common Stock","published_at":"2017-01-17T21:13:46.000Z","date":"2017-01-12","kind":"purchase","acquired":true,"shares":19484809,"ownership":{"direct":false,"nature":"By self as general partner"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On January 12, 2017, the David D. Kim Trust of 12/31/87 sold 19,484,809 shares of the Company's Common Stock to a newly created Pennsylvania limited partnership, Sujochil, LP (the \"Partnership\"), at a price of $10.8984 per share.  Susan Y. Kim and John T. Kim are general partners of the Partnership.  The limited partners of the Partnership are John T. Kim, Susan Y. Kim, two irrevocable trusts created by Susan Y. Kim for her descendants and two irrevocable trusts created by John T. Kim for his descendants.  Susan Y. Kim and John T. Kim are the co-trustees of all four trusts."},{"field":"price","element":"transactionPricePerShare","label":"F1","text":"On January 12, 2017, the David D. Kim Trust of 12/31/87 sold 19,484,809 shares of the Company's Common Stock to a newly created Pennsylvania limited partnership, Sujochil, LP (the \"Partnership\"), at a price of $10.8984 per share.  Susan Y. Kim and John T. Kim are general partners of the Partnership.  The limited partners of the Partnership are John T. Kim, Susan Y. Kim, two irrevocable trusts created by Susan Y. Kim for her descendants and two irrevocable trusts created by John T. Kim for his descendants.  Susan Y. Kim and John T. Kim are the co-trustees of all four trusts."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On January 12, 2017, the David D. Kim Trust of 12/31/87 sold 19,484,809 shares of the Company's Common Stock to a newly created Pennsylvania limited partnership, Sujochil, LP (the \"Partnership\"), at a price of $10.8984 per share.  Susan Y. Kim and John T. Kim are general partners of the Partnership.  The limited partners of the Partnership are John T. Kim, Susan Y. Kim, two irrevocable trusts created by Susan Y. Kim for her descendants and two irrevocable trusts created by John T. Kim for his descendants.  Susan Y. Kim and John T. Kim are the co-trustees of all four trusts."},{"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, or for any other purpose."}],"balance_after":19484809,"source":{"system":"sec-edgar","filing":"0000899243-17-001323","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924317001323/doc4.xml","form_type":"4"}}]}