{"transactions":[{"id":704890,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2026-07-22T20:33:20.000Z","date":"2026-07-20","kind":"exercise","planned":false,"acquired":true,"shares":250000,"price":9.48,"value":2370000.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On July 20, 2026, the Reporting Person's spouse exercised a stock option to acquire 250,000 shares of the Issuer's Common Stock that was granted to the Reporting Person's spouse on February 15, 2019."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":11187355,"source":{"system":"sec-edgar","filing":"0001158840-26-000001","document":"wk-form4_1784752398.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884026000001/wk-form4_1784752398.xml","form_type":"4"}},{"id":704889,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2026-07-22T20:33:20.000Z","date":"2026-07-20","kind":"exercise","planned":false,"acquired":true,"shares":200000,"price":9.86,"value":1972000.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 20, 2026, the Reporting Person's spouse exercised a stock option to acquire 200,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") that was granted to the Reporting Person's spouse on February 27, 2017."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":10937355,"source":{"system":"sec-edgar","filing":"0001158840-26-000001","document":"wk-form4_1784752398.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884026000001/wk-form4_1784752398.xml","form_type":"4"}},{"id":957518,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-12-30T21:39:36.000Z","date":"2025-12-26","kind":"gift","planned":false,"acquired":true,"shares":725000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 26, 2025, the 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 distributed 725,000 shares of common stock of Amkor, Inc. (the \"Issuer\") to the Susan Y. Kim 2023 Family Distribution Trust. The spouse of the Reporting Person, James J. Kim, is a co-trustee of the Susan Y. Kim 2023 Family Distribution Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":10737355,"source":{"system":"sec-edgar","filing":"0001158840-25-000017","document":"wk-form4_1767130773.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000017/wk-form4_1767130773.xml","form_type":"4"}},{"id":960045,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-12-24T00:01:21.000Z","date":"2025-12-19","kind":"gift","planned":false,"acquired":false,"shares":3244594,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On December 19, 2025, the spouse of the Reporting Person, James J. Kim, made a distribution of 3,244,594 shares of common stock of the Issuer to the 2025 Grantor Retained Annuity Trust No. 1 of\nJames J. Kim. Susan Y. Kim is the sole trustee of the 2025 Grantor Retained Annuity Trust No.1 of James J. Kim."}],"balance_after":10012355,"source":{"system":"sec-edgar","filing":"0001158840-25-000015","document":"wk-form4_1766534478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000015/wk-form4_1766534478.xml","form_type":"4"}},{"id":960044,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2025-12-24T00:01:21.000Z","date":"2025-12-19","kind":"gift","planned":false,"acquired":false,"shares":2538000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 24, 2025, the Reporting Person reported that the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024 distributed 705,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Agnes C. Kim Revocable Trust dtd 08/30/2018. These shares were inadvertently reported as being held indirectly by the Agnes C. Kim Revocable Trust dtd 08/30/2018 on a Form 4 filed by the Reporting Person on November 24, 2025. These shares were direct holdings of the Reporting Person, as the Reporting Person is the settlor, sole trustee, and sole beneficiary of such trust."},{"field":"shares","element":"transactionShares","label":"F2","text":"On December 19, 2025, the Reporting Person  made a distribution of 2,538,000 shares of common stock of the Issuer to the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim. Susan Y. Kim is the sole trustee of the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001158840-25-000015","document":"wk-form4_1766534478.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000015/wk-form4_1766534478.xml","form_type":"4"}},{"id":990513,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-11-25T01:58:09.000Z","date":"2025-11-20","kind":"gift","planned":false,"acquired":true,"shares":705000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By trusts"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 20, 2025, the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024\ndistributed 705,000 shares of the Common Stock of Amkor Technology, Inc (the \"Issuer\") to the Agnes C. Kim Revocable Trust, of which the Reporting Person is the settlor, sole trustee, and sole beneficiary.  Susan Y. Kim is the sole trustee of the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024."}],"balance_after":705000,"source":{"system":"sec-edgar","filing":"0001158840-25-000013","document":"wk-form4_1764035886.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000013/wk-form4_1764035886.xml","form_type":"4"}},{"id":1075182,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-08-05T23:30:36.000Z","date":"2025-08-01","kind":"sale","planned":false,"acquired":false,"shares":441589,"price":21.85,"value":9648719.65,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 1, 2025, James J. Kim distributed 441,589 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group"},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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":12290281,"source":{"system":"sec-edgar","filing":"0001158840-25-000012","document":"wk-form4_1754436633.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000012/wk-form4_1754436633.xml","form_type":"4"}},{"id":1077804,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-08-01T20:38:51.000Z","date":"2025-07-30","kind":"gift","planned":false,"acquired":true,"shares":2711000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On July 30, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 2,711,000 of the Issuer's Common Stock to James J. Kim, the spouse of the Reporting Person."}],"balance_after":12731870,"source":{"system":"sec-edgar","filing":"0001158840-25-000010","document":"wk-form4_1754080710.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000010/wk-form4_1754080710.xml","form_type":"4"}},{"id":1077803,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-08-01T20:38:51.000Z","date":"2025-07-30","kind":"gift","planned":false,"acquired":true,"shares":1738000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On July 30, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 1,738,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."}],"balance_after":1833000,"source":{"system":"sec-edgar","filing":"0001158840-25-000010","document":"wk-form4_1754080710.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000010/wk-form4_1754080710.xml","form_type":"4"}},{"id":1243881,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-02-26T22:40:05.000Z","date":"2025-02-24","kind":"sale","planned":false,"acquired":false,"shares":869565,"price":21.85,"value":18999995.25,"ownership":{"direct":false,"nature":"By Spouse"},"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":"James J. Kim is the spouse of the Reporting Person. 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":10020870,"source":{"system":"sec-edgar","filing":"0001158840-25-000004","document":"wk-form4_1740609598.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000004/wk-form4_1740609598.xml","form_type":"4"}},{"id":1298110,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2025-01-22T21:55:55.000Z","date":"2025-01-17","kind":"gift","planned":false,"acquired":false,"shares":548000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"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 Susan Y. Kim and 274,000 shares of the Issuer's Common Stock to John T. Kim. Susan Y. Kim and James J. Kim are co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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":10890435,"source":{"system":"sec-edgar","filing":"0001158840-25-000002","document":"wk-form4_1737582948.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884025000002/wk-form4_1737582948.xml","form_type":"4"}},{"id":1436250,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2024-08-12T21:23:40.000Z","date":"2024-08-08","kind":"gift","planned":false,"acquired":false,"shares":2200000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On August 8, 2024, James J. Kim transferred 2,200,000 shares of the Issuer's Common Stock to the 2024 Grantor Retained Annuity Trust of James J. Kim dtd. 8/5/2024 as a gift. James J. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"James J. Kim is the spouse of the Reporting Person. 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":11431594,"source":{"system":"sec-edgar","filing":"0001158840-24-000004","document":"wk-form4_1723497814.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884024000004/wk-form4_1723497814.xml","form_type":"4"}},{"id":1436249,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2024-08-12T21:23:40.000Z","date":"2024-08-08","kind":"gift","planned":false,"acquired":false,"shares":1600000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On August 8, 2024, the Reporting Person transferred 1,600,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the 2024 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 8/5/2024 as a gift. Susan Y. Kim is the sole trustee of the trust."}],"balance_after":95000,"source":{"system":"sec-edgar","filing":"0001158840-24-000004","document":"wk-form4_1723497814.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884024000004/wk-form4_1723497814.xml","form_type":"4"}},{"id":1479585,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-06-14T21:39:48.000Z","date":"2024-06-12","kind":"gift","planned":false,"acquired":true,"shares":1530000,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On June 12, 2024, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 1,530,000 of the Issuer's Common Stock to James J. Kim, the spouse of the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"James J. Kim is the spouse of the Reporting Person. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"Reflects shares of Common Stock withheld by the Issuer in connection with the vesting of certain restricted stock units granted to the Reporting Person's spouse on February 11, 2021, February 24, 2022 and  February  16, 2023  pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The shares were withheld to satisfy tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse."}],"balance_after":13631594,"source":{"system":"sec-edgar","filing":"0001158840-24-000002","document":"wk-form4_1718401181.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884024000002/wk-form4_1718401181.xml","form_type":"4"}},{"id":1479584,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2024-06-14T21:39:48.000Z","date":"2024-06-12","kind":"gift","planned":false,"acquired":true,"shares":980000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On June 12, 2024, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 980,000 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the Reporting Person."}],"balance_after":1695000,"source":{"system":"sec-edgar","filing":"0001158840-24-000002","document":"wk-form4_1718401181.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000115884024000002/wk-form4_1718401181.xml","form_type":"4"}},{"id":1699664,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2023-12-27T21:30:08.000Z","date":"2023-12-22","kind":"gift","planned":false,"acquired":true,"shares":715000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 22, 2023, the Agnes C. Kim 2020-1 Qualified Annuity Trust Under Agreement dated 12/6/2020 (the \"ACK Trust\") distributed 715,000 shares of the Common Stock of Amkor Technology, Inc. to the Reporting Person. Susan Y. Kim is the sole trustee of the ACK Trust."}],"balance_after":715000,"source":{"system":"sec-edgar","filing":"0001209191-23-059785","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123059785/doc4.xml","form_type":"4"}},{"id":1739533,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:12.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":false,"shares":1211193,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On November 14, 2023, the Family Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18 distributed 1,211,193 shares of the Issuer's Common Stock to Kim Capital Partners - KCP, LLC. The Reporting Person's spouse and Susan Y. Kim are co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"James J. Kim is the spouse of the Reporting Person. 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":12087709,"source":{"system":"sec-edgar","filing":"0001209191-23-055585","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055585/doc4.xml","form_type":"4"}},{"id":1739532,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-11-16T23:00:12.000Z","date":"2023-11-14","kind":"gift","planned":false,"acquired":false,"shares":1958355,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On November 14, 2023, the Family Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dtd. 4/1/20 distributed 1,958,355 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Kim Capital Partners - KCP, LLC. The Reporting Person's spouse and Susan Y. Kim are co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"Reflects the conversion of the Reporting Person's spouse from general partner to limited partner of 915 Investments, LP, which decreased the Reporting Person's spouse's beneficial ownership by 39,594,980 shares of the Issuer's Common Stock."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"James J. Kim is the spouse of the Reporting Person. 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":13298902,"source":{"system":"sec-edgar","filing":"0001209191-23-055585","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123055585/doc4.xml","form_type":"4"}},{"id":1760705,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2023-10-13T22:00:14.000Z","date":"2023-10-11","kind":"gift","planned":false,"acquired":false,"shares":168750,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On October 11, 2023, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18 distributed 168,750 shares of the Common Stock of of Amkor Technology, Inc. to Susan Y. Kim. The Reporting Person's spouse is a trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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":54852237,"source":{"system":"sec-edgar","filing":"0001209191-23-052791","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123052791/doc4.xml","form_type":"4"}},{"id":1784979,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2023-09-08T22:47:13.000Z","date":"2023-09-06","kind":"sale","planned":false,"acquired":false,"shares":10000000,"price":23.22,"value":232200000.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On September 6, 2023, 915 Investments, LP sold 10,000,000 shares of Common Stock of Amkor Technology, Inc. pursuant to an underwritten secondary offering. The Reporting Person's spouse is the general partner of 915 Investments, LP."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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":55020987,"source":{"system":"sec-edgar","filing":"0001209191-23-048839","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123048839/doc4.xml","form_type":"4"}},{"id":1822344,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:48.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":false,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On July 25, 2023, the JJK Trust distributed 443,811 shares of the Issuer's Common Stock to Susan Y. Kim. The Reporting Person's spouse is a trustee of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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":65020987,"source":{"system":"sec-edgar","filing":"0001209191-23-043572","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043572/doc4.xml","form_type":"4"}},{"id":1822343,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2023-07-27T22:00:48.000Z","date":"2023-07-25","kind":"gift","planned":false,"acquired":false,"shares":443811,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By Spouse"},"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 04/01/20 (the \"JJK Trust\") distributed 443,811 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to John T. Kim. The Reporting Person's spouse is a trustee of the JJK Trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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":"Reflects the distribution of 340,000 shares of the Issuer's Common Stock to Susan Y. Kim on June 16, 2023 by the Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dated 4/1/20 (the \"SYK Trust\"). The Reporting Person's spouse is a trustee of the SYK Trust."}],"balance_after":65464798,"source":{"system":"sec-edgar","filing":"0001209191-23-043572","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123043572/doc4.xml","form_type":"4"}},{"id":1906646,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-05-03T22:00:19.000Z","date":"2023-05-01","kind":"gift","planned":false,"acquired":false,"shares":5117004,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On May 1, 2023, James J. Kim transferred 5,117,004 shares of the Issuer's Common Stock to the 2023 Grantor Retained Annuity Trust of James J. Kim dtd. 4/26/23 as a gift. James J. Kim is the spouse of the Reporting Person. Susan Y. Kim is the sole trustee of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"James J. Kim is the spouse of the Reporting Person. 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":66248609,"source":{"system":"sec-edgar","filing":"0001209191-23-027137","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123027137/doc4.xml","form_type":"4"}},{"id":1906645,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-05-03T22:00:19.000Z","date":"2023-05-01","kind":"gift","planned":false,"acquired":false,"shares":3278001,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On May 1, 2023, the Reporting Person transferred 3,278,001 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to the 2023 Grantor Retained Annuity Trust of Agnes C. Kim dtd. 4/26/23 as a gift. Susan Y. Kim is the sole trustee of the trust."}],"balance_after":0,"source":{"system":"sec-edgar","filing":"0001209191-23-027137","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123027137/doc4.xml","form_type":"4"}},{"id":1993907,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Restricted Stock Units","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-24","kind":"exercise","acquired":false,"shares":2599,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F9","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person's spouse was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first\nanniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person's spouse was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first\nanniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person's spouse was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first\nanniversary of the RSU Grant Date."}],"balance_after":8149,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2599},"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":11,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993906,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-24","kind":"tax_withholding","acquired":false,"shares":1053,"price":25.27,"value":26609.31,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F10","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the spouse of the\nReporting Person on the RSU Grant Date. These shares were withheld to satisfy the tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":71365613,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993905,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-24","kind":"exercise","acquired":true,"shares":2599,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F9","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person's spouse was granted 10,748 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's Common Stock on a one-to-one basis and vest in four equal annual installments beginning on the first\nanniversary of the RSU Grant Date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":71366666,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993904,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"tax_withholding","acquired":false,"shares":25267,"price":25.28,"value":638749.76,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F8","text":"The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":71364067,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993903,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"grant","acquired":true,"shares":59477,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F7","text":"This Form 4 reports the vesting on February 22, 2023 of 59,477 shares of the Issuer's Common Stock underlying performance-vested restricted stock units (\"PSUs\") granted to the spouse of the Reporting Person on February 11, 2021 pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic cumulative earnings per share performance goal over a two-year performance period beginning January 1, 2021 and ending on December 31, 2022."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":71389334,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993902,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F6","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim, Settlor, FBO Jason Lee Kim dated 11/17/03 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":71329857,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993901,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Jacqueline Mary Panichello dated 10/3/94 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":70945857,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993900,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Dylan James Panichello dated 10/15/01 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":70561857,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993899,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Allyson Lee Kim dated 10/15/01 sold 384,000 shares of the Issuer's Common Stock to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 and is voluntarily reported."}],"balance_after":70177857,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":1993898,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (11)"}}],"security":"Common Stock","published_at":"2023-02-25T00:15:45.000Z","date":"2023-02-22","kind":"other","acquired":true,"shares":384000,"price":25.28,"value":9707520.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On February 22, 2023, the Irrevocable Deed of Trust of James J. Kim for Alexandra Kim Panichello dated 12/24/92 sold 384,000 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") to James J. Kim in full payment of the principal and accrued interest of a note payable to Mr. Kim by such trust. Mr. Kim is the spouse of the Reporting Person. This transaction is exempt pursuant to Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), and is voluntarily reported."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"James J. Kim is the spouse of the Reporting Person. 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,\nexcept to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":69793857,"source":{"system":"sec-edgar","filing":"0001209191-23-012919","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012919/doc4.xml","form_type":"4"}},{"id":2004348,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group"}}],"security":"Restricted Stock Units","published_at":"2023-02-21T14:26:43.000Z","date":"2023-02-16","kind":"grant","acquired":true,"shares":9279,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The transaction represents shares of Common Stock of Amkor Technology Inc. (the \"Issuer\") underlying time-vested restricted stock units granted to the Reporting Person's spouse on February 16, 2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the services of the Reporting Person's spouse as an employee of the Issuer and will vest in four equal installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The transaction represents shares of Common Stock of Amkor Technology Inc. (the \"Issuer\") underlying time-vested restricted stock units granted to the Reporting Person's spouse on February 16, 2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the services of the Reporting Person's spouse as an employee of the Issuer and will vest in four equal installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The transaction represents shares of Common Stock of Amkor Technology Inc. (the \"Issuer\") underlying time-vested restricted stock units granted to the Reporting Person's spouse on February 16, 2023 (the \"Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the services of the Reporting Person's spouse as an employee of the Issuer and will vest in four equal installments beginning on the first anniversary of the Grant Date."}],"balance_after":9279,"derivative":{"underlying":"Common Stock","underlying_shares":9279},"source":{"system":"sec-edgar","filing":"0001209191-23-010980","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010980/doc4.xml","form_type":"4"}},{"id":2014019,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2023-02-16T01:18:09.000Z","date":"2023-02-09","kind":"gift","acquired":true,"shares":667225,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On February 9, 2023 the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A dated 12/16/20 distributed 667,225 shares of the Common Stock of Amkor Technology, Inc. to the Reporting Person."}],"balance_after":3278001,"source":{"system":"sec-edgar","filing":"0001209191-23-009928","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009928/doc4.xml","form_type":"4"}},{"id":2017307,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Restricted Stock Units","published_at":"2023-02-15T01:09:22.000Z","date":"2023-02-10","kind":"exercise","acquired":false,"shares":2630,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"On the Grant Date, the Reporting Person's spouse was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"On the Grant Date, the Reporting Person's spouse was granted 10,893 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date."}],"balance_after":5446,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":2630},"source":{"system":"sec-edgar","filing":"0001209191-23-009558","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009558/doc4.xml","form_type":"4"}},{"id":2017306,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-02-15T01:09:22.000Z","date":"2023-02-10","kind":"tax_withholding","acquired":false,"shares":1081,"price":27.6,"value":29835.6,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") withheld by the Issuer in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person's spouse on February 11, 2021 (the \"Grant Date\") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. The shares were withheld to satisfy tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse."},{"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."}],"balance_after":69409857,"source":{"system":"sec-edgar","filing":"0001209191-23-009558","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009558/doc4.xml","form_type":"4"}},{"id":2017305,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2023-02-15T01:09:22.000Z","date":"2023-02-10","kind":"exercise","acquired":true,"shares":2630,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"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."}],"balance_after":69410938,"source":{"system":"sec-edgar","filing":"0001209191-23-009558","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123009558/doc4.xml","form_type":"4"}},{"id":2079037,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Restricted Stock Units","published_at":"2022-12-22T00:27:06.000Z","date":"2022-12-19","kind":"exercise","acquired":false,"shares":88,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on the Original Form 4, the price in Table I, Column 4, line 4 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"shares","element":"transactionShares","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on the Original Form 4, the price in Table I, Column 4, line 4 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on the Original Form 4, the price in Table I, Column 4, line 4 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on the Original Form 4, the price in Table I, Column 4, line 4 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."}],"balance_after":10660,"derivative":{"underlying":"Common Stock","underlying_shares":88},"source":{"system":"sec-edgar","filing":"0000899243-22-039187","document":"doc4a.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039187/doc4a.xml","form_type":"4/A","original_submission_date":"2022-12-21"}},{"id":2079036,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Restricted Stock Units","published_at":"2022-12-22T00:27:06.000Z","date":"2022-12-19","kind":"exercise","acquired":false,"shares":93,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on a Form 4 earlier today (the \"Original Form 4\"), the price in Table I, Column 4, line 2 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on a Form 4 earlier today (the \"Original Form 4\"), the price in Table I, Column 4, line 2 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on a Form 4 earlier today (the \"Original Form 4\"), the price in Table I, Column 4, line 2 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on a Form 4 earlier today (the \"Original Form 4\"), the price in Table I, Column 4, line 2 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."}],"balance_after":8076,"derivative":{"underlying":"Common Stock","underlying_shares":93},"source":{"system":"sec-edgar","filing":"0000899243-22-039187","document":"doc4a.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039187/doc4a.xml","form_type":"4/A","original_submission_date":"2022-12-21"}},{"id":2079035,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-12-22T00:27:06.000Z","date":"2022-12-19","kind":"tax_withholding","acquired":false,"shares":88,"price":24.47,"value":2153.36,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on the Original Form 4, the price in Table I, Column 4, line 4 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"shares","element":"transactionShares","label":"F3","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":69408308,"source":{"system":"sec-edgar","filing":"0000899243-22-039187","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039187/doc4a.xml","form_type":"4/A","original_submission_date":"2022-12-21"}},{"id":2079034,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-12-22T00:27:06.000Z","date":"2022-12-19","kind":"tax_withholding","acquired":false,"shares":93,"price":24.47,"value":2275.71,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") of the Reporting Person's spouse to pay income taxes associated with said spouse's becoming retirement eligible.  When this transaction was reported on a Form 4 earlier today (the \"Original Form 4\"), the price in Table I, Column 4, line 2 was incorrectly reflected as zero and the associated footnote incorrectly stated that the shares were sold.  In addition, the transaction was not reported in Table II."},{"field":"shares","element":"transactionShares","label":"F3","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":69408308,"source":{"system":"sec-edgar","filing":"0000899243-22-039187","document":"doc4a.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039187/doc4a.xml","form_type":"4/A","original_submission_date":"2022-12-21"}},{"id":2079027,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-12-21T14:48:40.000Z","date":"2022-12-19","kind":"tax_withholding","acquired":false,"shares":88,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse.  Said early vesting was due to said spouse's retirement eligibility.  The shares were issued on 12/19/2022 and sold the same day to raise funds for said spouse's income taxes."},{"field":"shares","element":"transactionShares","label":"F3","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":69408308,"source":{"system":"sec-edgar","filing":"0000899243-22-039154","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039154/doc4.xml","form_type":"4"}},{"id":2079026,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-12-21T14:48:40.000Z","date":"2022-12-19","kind":"exercise","acquired":true,"shares":88,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"The reported transaction involved the withholding of 88 shares of the Issuer's Common Stock issuable upon the early vesting of an equal number of RSUs of the Reporting Person's spouse.  Said early vesting was due to said spouse's retirement eligibility.  The shares were issued on 12/19/2022 and sold the same day to raise funds for said spouse's income taxes."},{"field":"shares","element":"transactionShares","label":"F3","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":69408396,"source":{"system":"sec-edgar","filing":"0000899243-22-039154","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039154/doc4.xml","form_type":"4"}},{"id":2079025,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-12-21T14:48:40.000Z","date":"2022-12-19","kind":"tax_withholding","acquired":false,"shares":93,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (RSUs\") of the Reporting Person's spouse.  Said early vesting was due to said spouse's retirement eligibility.  The shares were issued on 12/19/2022 and sold the same day to raise funds for said spouse's income taxes."},{"field":"shares","element":"transactionShares","label":"F3","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":69408308,"source":{"system":"sec-edgar","filing":"0000899243-22-039154","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039154/doc4.xml","form_type":"4"}},{"id":2079024,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-12-21T14:48:40.000Z","date":"2022-12-19","kind":"exercise","acquired":true,"shares":93,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The reported transaction involved the withholding of 93 shares of Common Stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (RSUs\") of the Reporting Person's spouse.  Said early vesting was due to said spouse's retirement eligibility.  The shares were issued on 12/19/2022 and sold the same day to raise funds for said spouse's income taxes."},{"field":"shares","element":"transactionShares","label":"F3","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":69408401,"source":{"system":"sec-edgar","filing":"0000899243-22-039154","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322039154/doc4.xml","form_type":"4"}},{"id":2082341,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-19T20:46:17.000Z","date":"2022-12-06","kind":"gift","acquired":false,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On December 6, 2022, the Trust distributed 1,051,8801 shares of the Issuer's Common Stock to John T. Kim.  The Reporting Person's spouse is a co-trustee of the Trust and the father of John T. Kim."},{"field":"shares","element":"transactionShares","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":69408308,"source":{"system":"sec-edgar","filing":"0000899243-22-038973","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038973/doc4.xml","form_type":"4"}},{"id":2082340,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-19T20:46:17.000Z","date":"2022-12-06","kind":"gift","acquired":false,"shares":1051880,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On December 6, 2022, the James J. Kim 2019-1 Qualified Annuity Trust U/A dated 9/10/19 (the \"Trust\") distributed 1,051,880 shares of the Issuer's Common Stock to Susan Y. Kim.  The Reporting Person's spouse is a co-trustee of the Trust and the father of Susan Y. Kim."},{"field":"shares","element":"transactionShares","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":70460188,"source":{"system":"sec-edgar","filing":"0000899243-22-038973","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038973/doc4.xml","form_type":"4"}},{"id":2082339,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (5)"}}],"security":"Common Stock","published_at":"2022-12-19T20:46:17.000Z","date":"2022-12-01","kind":"gift","acquired":false,"shares":116500,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On December 1, 2022, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd. 8/29/18 distributed 116,500 shares of the Common Stock of Amkor Technology, Inc. (the \"Issuer\") to Susan Y. Kim.  The Reporting Person's spouse is a trustee of said trust and the father of Susan Y. Kim."},{"field":"shares","element":"transactionShares","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":71512068,"source":{"system":"sec-edgar","filing":"0000899243-22-038973","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322038973/doc4.xml","form_type":"4"}},{"id":2200426,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-07-30T00:30:57.000Z","date":"2022-07-12","kind":"gift","acquired":false,"shares":429750,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 12, 2022, the Qualified Annuity Trust under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement dtd. 4/1/20 distributed 429,750 shares of the Common Stock of Amkor Technology, Inc. to Susan Y. Kim. Susan Y. Kim and James J. Kim, the Reporting Person's spouse, are the co-trustees of the trust. James J. Kim and Susan Y. Kim are father and daughter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":71628568,"source":{"system":"sec-edgar","filing":"0000899243-22-027101","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322027101/doc4.xml","form_type":"4"}},{"id":2294167,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-04-20T23:33:25.000Z","date":"2022-04-04","kind":"gift","acquired":true,"shares":755000,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On April 4, 2022, the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A dated 12/16/20 distributed 755,000 shares of the Common Stock of Amkor Technology, Inc. to the Reporting Person.  Susan Y. Kim is the sole trustee of such trust."}],"balance_after":2610776,"source":{"system":"sec-edgar","filing":"0000899243-22-015220","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322015220/doc4.xml","form_type":"4"}},{"id":2372736,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-02-25T21:05:38.000Z","date":"2022-02-24","kind":"grant","acquired":true,"shares":10748,"price":0,"value":0.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The transaction represents shares of the Issuer's Common Stock underlying time-vested restricted stock units granted to the Reporting Person's spouse on February 24, 2022 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan and the related award agreement (the \"RSUs\").  The RSUs were awarded for no consideration other than the Reporting Person's spouse's service as an employee of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":72077235,"source":{"system":"sec-edgar","filing":"0000899243-22-007880","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322007880/doc4.xml","form_type":"4"}},{"id":2395042,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (3)"}}],"security":"Common Stock","published_at":"2022-02-15T19:42:23.000Z","date":"2022-02-11","kind":"tax_withholding","acquired":false,"shares":684,"price":20.9,"value":14295.6,"ownership":{"direct":false,"nature":"My spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"The transaction represents shares of the Issuer's Common Stock withheld by the Issuer in connection with the vesting of certain restricted stock units granted to the Reporting Person's spouse on February 11, 2021 pursuant to the Issuer's Equity Incentive Plan and the related award agreement. The shares were withheld to satisfy tax withholding obligations of the Reporting Person's spouse. The Issuer will pay these taxes on behalf of the Reporting Person's spouse."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":72066487,"source":{"system":"sec-edgar","filing":"0000899243-22-006392","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322006392/doc4.xml","form_type":"4"}},{"id":2424301,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-01-28T01:37:48.000Z","date":"2022-01-18","kind":"gift","acquired":false,"shares":125600,"price":23.86,"value":2996816.0,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On January 18, 2022, the Qualified Annuity Trust under the Susan Y. Kim 2018-1 Irrevocable Trust Agreement dtd August 29, 2018 distributed 125,600 shares of the Issuer's Common Stock to Susan Y. Kim.  Susan Y. Kim and James J. Kim, the reporting person's spouse, are the co-trustees of the trust.  James J. Kim and Susan Y. Kim are father and  daughter."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"The Form 4 filed with the Commission by the reporting person on January 21, 2022 reflected 74,546,118 shares of the Issuer's Common Stock as held indirectly by the reporting person by her spouse. The correct number should have been 72,192,771."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended (\"Section 16\"), or for any other purpose."}],"balance_after":72067171,"source":{"system":"sec-edgar","filing":"0000899243-22-003496","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322003496/doc4.xml","form_type":"4"}},{"id":2429062,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2022-01-21T18:01:54.000Z","date":"2021-12-27","kind":"gift","acquired":true,"shares":164678,"price":23.45,"value":3861699.1,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F4","text":"On December 27, 2021, Susan Y. Kim transferred 164,678 shares of the Issuer's Common Stock to Susins, LLC. Susins, LLC is being treated as a corporation for purposes of Section 16 of the Securities and Exchange Act of 1934, as amended (\"Section 16\"). The Susan Y. Kim 2012 Generation-Skipping Trust U/A dated December 11, 2012 is being treated as a controlling shareholder of Susins, LLC. James J. Kim is a trustee of said trust and members of his immediate family are beneficiaries thereof."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":74546118,"source":{"system":"sec-edgar","filing":"0000899243-22-002821","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002821/doc4.xml","form_type":"4"}},{"id":2429061,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2022-01-21T18:01:54.000Z","date":"2021-10-04","kind":"gift","acquired":false,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F3","text":"On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to John T. Kim.  James J. Kim and John T. Kim are father and son."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":74381440,"source":{"system":"sec-edgar","filing":"0000899243-22-002821","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002821/doc4.xml","form_type":"4"}},{"id":2429060,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2022-01-21T18:01:54.000Z","date":"2021-10-04","kind":"gift","acquired":false,"shares":626192,"price":24.7,"value":15466942.4,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F2","text":"On October 4, 2021, the Qualified Annuity Trust under the James J. Kim 2018-1 Qualified Annuity Trust Agreement dtd 8/30/18 distributed 626,192 shares of the Issuer's Common Stock to Susan Y. Kim.  James J. Kim and Susan Y. Kim are the co-trustees of the trust."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":75007632,"source":{"system":"sec-edgar","filing":"0000899243-22-002821","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002821/doc4.xml","form_type":"4"}},{"id":2429059,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (6)"}}],"security":"Common Stock","published_at":"2022-01-21T18:01:54.000Z","date":"2021-07-14","kind":"gift","acquired":false,"shares":271895,"price":23.15,"value":6294369.25,"ownership":{"direct":false,"nature":"By spouse"},"footnotes":[{"field":"shares","element":"transactionShares","label":"F1","text":"On July 14, 2021, the Qualified Annuity Trust Under the Susan Y. Kim 2020-1 Irrevocable Trust Agreement Dated 04/01/20 distributed 271,895 shares of the Issuer's Common Stock to Susan Y. Kim.  Susan Y. Kim and James J. Kim are the co-trustees of the trust. James J. Kim and Susan Y. Kim are father and daughter. James J. Kim is the spouse of the reporting person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"The reporting person disclaims beneficial ownership of these securities, except to the extent of the reporting person's pecuniary interest therein, and this report shall not be deemed an admission that the reporting person is the beneficial owner of such securities, except to the extent of the reporting person's pecuniary interest therein, for purposes of Section 16, or for any other purpose."}],"balance_after":75633824,"source":{"system":"sec-edgar","filing":"0000899243-22-002821","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322002821/doc4.xml","form_type":"4"}},{"id":2450598,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-01-04T20:32:45.000Z","date":"2021-12-30","kind":"purchase","acquired":true,"shares":668666,"price":24.68,"value":16502676.88,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"On December 30, 2021, Sujoda Investments, LP transferred 668,666 shares of the Issuer's Common Stock to James J. Kim and 668,666 shares of the Issuer's Common Stock to the reporting person in partial payment of the principal of a joint Note."},{"field":"shares","element":"transactionShares","label":"F2","text":"On December 30, 2021, Sujoda Investments, LP transferred 668,666 shares of the Issuer's Common Stock to James J. Kim and 668,666 shares of the Issuer's Common Stock to the reporting person in partial payment of the principal of a joint Note."}],"balance_after":1855776,"source":{"system":"sec-edgar","filing":"0000899243-22-000435","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322000435/doc4.xml","form_type":"4"}},{"id":2450597,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Member of 10% owner group (4)"}}],"security":"Common Stock","published_at":"2022-01-04T20:32:45.000Z","date":"2021-12-30","kind":"purchase","acquired":true,"shares":1187807,"price":24.68,"value":29315076.76,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"On December 30, 2021, Sujoda Investments, LP transferred 1,187,807 shares of the Issuer's Common Stock to the reporting person in payment of the principal of a Note."},{"field":"shares","element":"transactionShares","label":"F1","text":"On December 30, 2021, Sujoda Investments, LP transferred 1,187,807 shares of the Issuer's Common Stock to the reporting person in payment of the principal of a Note."}],"balance_after":1187110,"source":{"system":"sec-edgar","filing":"0000899243-22-000435","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924322000435/doc4.xml","form_type":"4"}},{"id":2859985,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-02-16T13:46:52.000Z","date":"2020-12-21","kind":"gift","acquired":false,"shares":4083065,"price":15.01,"value":61286805.65,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F5","text":"On December 21, 2020, the reporting person transferred 4,083,065 shares of the Issuer's Common Stock to the Agnes C. Kim 2020-1 Qualified Annuity Trust U/A Dated 12/16/20 as a gift. Susan Y. Kim is the sole trustee of the trust. This transaction was previously reported on Form 3 for the trust and Form 4 for Susan Y. Kim.  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":23,"source":{"system":"sec-edgar","filing":"0000899243-21-006545","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321006545/doc5.xml","form_type":"5"}},{"id":2859984,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-02-16T13:46:52.000Z","date":"2020-12-17","kind":"sale","acquired":true,"shares":1633226,"price":15.41,"value":25168012.66,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F4","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Descendants of John T. Kim dated 2/5/08 sold 1,633,226 shares of Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a Note payable to her by such trust. Susan Y. Kim and John T. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person."}],"balance_after":23,"source":{"system":"sec-edgar","filing":"0000899243-21-006545","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321006545/doc5.xml","form_type":"5"}},{"id":2859983,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-02-16T13:46:52.000Z","date":"2020-12-17","kind":"sale","acquired":true,"shares":816613,"price":15.41,"value":12584006.33,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F3","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Dylan James Panichello & Descendants dated 2/5/08 sold 816,613 shares of Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a Note payable to her by such trust. Susan Y. Kim and John T. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person."}],"balance_after":23,"source":{"system":"sec-edgar","filing":"0000899243-21-006545","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321006545/doc5.xml","form_type":"5"}},{"id":2859982,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-02-16T13:46:52.000Z","date":"2020-12-17","kind":"sale","acquired":true,"shares":816613,"price":15.41,"value":12584006.33,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F2","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Jacqueline Mary Panichello & Descendants dated 2/5/08 sold 816,613 shares of Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a Note payable to her by such trust. Susan Y. Kim and John T. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person."}],"balance_after":23,"source":{"system":"sec-edgar","filing":"0000899243-21-006545","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321006545/doc5.xml","form_type":"5"}},{"id":2859981,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":29210,"kind":"person","name":"KIM AGNES C","position":1,"cik":"0001158840","reported_name":"KIM AGNES C","relationship":{"director":false,"officer":false,"ten_percent_owner":false,"other":true,"other_text":"Exhibit 99.1"}}],"security":"Common Stock","published_at":"2021-02-16T13:46:52.000Z","date":"2020-12-17","kind":"sale","acquired":true,"shares":816613,"price":15.41,"value":12584006.33,"ownership":{"direct":true},"footnotes":[{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On December 17, 2020, the James J. Kim 2008 Trust FBO Alexandra Kim Panichello & Descendants dated 2/5/08 sold 816,613 shares of Issuer's Common Stock to Agnes C. Kim in full payment of the principal and accrued interest of a Note payable to her by such trust. Susan Y. Kim and John T. Kim are co-trustees of the trust. This transaction was reported on a Form 4 for the trust on December 20, 2020, but was not separately reported for the reporting person."}],"balance_after":23,"source":{"system":"sec-edgar","filing":"0000899243-21-006545","document":"doc5.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000089924321006545/doc5.xml","form_type":"5"}}]}