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The RSUs were awarded for no consideration other\nthan the Reporting Person's service as a service provider of the Issuer and vested in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs on the Grant Date pursuant to the Issuer's Equity Incentive Plan. The RSUs were awarded for no consideration other\nthan the Reporting Person's service as a service provider of the Issuer and vested in four equal annual installments beginning on the first anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs on the Grant Date pursuant to the Issuer's Equity Incentive Plan. 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The RSUs were awarded\nfor no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and\nannually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date."}],"balance_after":21731,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":10468},"source":{"system":"sec-edgar","filing":"0001628280-26-011061","document":"wk-form4_1771967182.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026011061/wk-form4_1771967182.xml","form_type":"4"}},{"id":885732,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Restricted Stock Units","published_at":"2026-02-24T21:06:25.000Z","date":"2026-02-20","kind":"exercise","planned":false,"acquired":false,"shares":7153,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested RSUs on the 2024 Grant Date pursuant to the Issuer's Equity Incentive Plan. 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The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date."}],"balance_after":18185,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":18185},"source":{"system":"sec-edgar","filing":"0001628280-26-010230","document":"wk-form4_1771622431.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000162828026010230/wk-form4_1771622431.xml","form_type":"4"}},{"id":891240,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2026-02-20T21:20:35.000Z","date":"2026-02-18","kind":"tax_withholding","planned":false,"acquired":false,"shares":2621,"price":46.74,"value":122505.54,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares of the Issuer's common stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations. 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The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the 2025 Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the 2025 Grant Date."}],"balance_after":32594,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":32594},"source":{"system":"sec-edgar","filing":"0001047127-25-000034","document":"wk-form4_1740173814.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000034/wk-form4_1740173814.xml","form_type":"4"}},{"id":1253765,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Restricted Stock Units","published_at":"2025-02-21T21:37:02.000Z","date":"2025-02-20","kind":"exercise","planned":false,"acquired":false,"shares":7152,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"On the 2024 Grant Date, the Reporting Person was granted 22,268 RSUs which vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"On the 2024 Grant Date, the Reporting Person was granted 22,268 RSUs which vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date."}],"balance_after":14846,"derivative":{"exercise_price":0,"underlying":"Common Stock","underlying_shares":7152},"source":{"system":"sec-edgar","filing":"0001047127-25-000034","document":"wk-form4_1740173814.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000104712725000034/wk-form4_1740173814.xml","form_type":"4"}},{"id":1253764,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2025-02-21T21:37:02.000Z","date":"2025-02-20","kind":"tax_withholding","planned":false,"acquired":false,"shares":3240,"price":23.01,"value":74552.4,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F3","text":"The transaction represents shares withheld by the Issuer in connection with the vesting of certain restricted stock units (\"RSUs\") granted to the Reporting Person on February 20, 2024 (the \"2024 Grant Date\") pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. 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These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person."},{"field":"balance_after","element":"sharesOwnedFollowingTransaction","label":"F1","text":"On February 22, 2024, the Reporting Person filed a Form 4 (the \"Previous Form 4\") which inadvertently underreported by 31 shares the number of shares of Amkor Technology, Inc. (the \"Issuer\") common stock (\"Shares\") withheld by the Issuer in connection with the vesting of performance-vested restricted stock units to satisfy the Reporting Person's tax withholding obligations. As a result, the Previous Form 4 inadvertently reported that the Reporting Person beneficially owned 17,292 Shares as of February 20, 2024, instead of 17,261. 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The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in three equal annual installments beginning on the first anniversary of the Grant Date and annually thereafter, such that 100% will be vested on the third anniversary of the Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 20, 2024 (the \"Grant Date\") pursuant to the Issuer's Equity Incentive Plan (the \"RSUs\"). 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The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":9911,"source":{"system":"sec-edgar","filing":"0001209191-23-012950","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012950/doc4.xml","form_type":"4"}},{"id":1993938,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2023-02-25T00:45:56.000Z","date":"2023-02-24","kind":"exercise","acquired":true,"shares":1816,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"On February 24, 2022 (the \"RSU Grant Date\"), the Reporting Person was granted 7,523 time-vested restricted stock units (\"RSUs\") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the applicable award agreement. The RSUs convert into shares of the Issuer's common stock on a one-to-one basis and vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":10703,"source":{"system":"sec-edgar","filing":"0001209191-23-012950","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012950/doc4.xml","form_type":"4"}},{"id":1993937,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2023-02-25T00:45:56.000Z","date":"2023-02-22","kind":"tax_withholding","acquired":false,"shares":6776,"price":25.46,"value":172516.96,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F2","text":"The transaction represents shares of the Issuer's common stock withheld by the Issuer in connection with the vesting of PSUs to satisfy the Reporting Person's tax withholding obligations.  The Issuer will pay these taxes on behalf of the Reporting Person."}],"balance_after":8887,"source":{"system":"sec-edgar","filing":"0001209191-23-012950","document":"doc4.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123012950/doc4.xml","form_type":"4"}},{"id":1993936,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2023-02-25T00:45:56.000Z","date":"2023-02-22","kind":"grant","acquired":true,"shares":14869,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"This Form 4 reports the vesting on February 22, 2023 of 14,869 shares of common stock of Amkor Technology, Inc. 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The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"Represents shares of the Issuer's common stock underlying time-vested restricted stock units granted on February 16, 2023 (the \"RSU Grant Date\") pursuant to the Issuer's 2021 Equity Incentive Plan (the \"RSUs\"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the RSU Grant Date."}],"balance_after":7423,"derivative":{"underlying":"Common Stock","underlying_shares":7423},"source":{"system":"sec-edgar","filing":"0001209191-23-010752","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010752/doc4.xml","form_type":"4"}},{"id":2008565,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Employee Stock Option (Right-to-Buy)","published_at":"2023-02-17T22:06:20.000Z","date":"2023-02-15","kind":"exercise","acquired":false,"shares":6250,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"This stock option (\"the Option\") to acquire 100,000 shares of the Issuer's common stock (the \"Option Shares\") was granted on February 15, 2019 (the \"Option Grant Date\") and vested over four years as follows: (i) with respect to 25% of the Option Shares, on the first anniversary of the Option Grant Date; and (ii) with respect to the remainder of the Option Shares, in equal quarterly installments thereafter, such that 100% of the Option vested on the fourth anniversary of the Option Grant Date."}],"balance_after":0,"derivative":{"exercise_price":9.48,"exercise_date":"2020-02-15","expiration_date":"2029-02-15","underlying":"Common Stock","underlying_shares":6250},"source":{"system":"sec-edgar","filing":"0001209191-23-010752","document":"doc4.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1047127/000120919123010752/doc4.xml","form_type":"4"}},{"id":2008564,"issuer":{"id":3481,"kind":"organization","name":"AMKOR TECHNOLOGY, INC.","symbol":"AMKR"},"owners":[{"id":64548,"kind":"person","name":"Haghighi Farshad","position":1,"cik":"0001887579","reported_name":"Haghighi Farshad","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"Executive Vice President"}}],"security":"Common Stock","published_at":"2023-02-17T22:06:20.000Z","date":"2023-02-15","kind":"sale","acquired":false,"shares":6250,"price":26.89,"value":168062.5,"ownership":{"direct":true},"footnotes":[{"field":"kind","element":"transactionCoding","label":"F1","text":"The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on September 1, 2022."},{"field":"price","element":"transactionPricePerShare","label":"F2","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $26.64 to $27.10.The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. 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(the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person becoming retirement eligible."},{"field":"shares","element":"transactionShares","label":"F1","text":"The reporting transaction involved the withholding of 24 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person becoming retirement eligible."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F1","text":"The reporting transaction involved the withholding of 24 shares of common stock of Amkor Technology, Inc. (the \"Issuer\") issuable upon the early vesting of an equal number of restricted stock units (\"RSUs\") to pay taxes associated with the Reporting Person becoming retirement eligible."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F1","text":"The reporting transaction involved the withholding of 24 shares of common stock of Amkor Technology, Inc. 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