AMKR

SEC source: 0001047127-24-000207 · wk-form4_1732311221.xml · derivative · entry 14

KIM SUSAN Y · CIK 0001158922 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,000 shares

Expires 2025-05-05

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F6 · derivative.exercise_date: This stock option to acquire 20,000 shares of the Issuer's Common Stock was granted on May 5, 2015 and vested in full on May 4, 2016.

SEC source: 0001047127-24-000207 · wk-form4_1732311221.xml · derivative · entry 13

KIM SUSAN Y · CIK 0001158922 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 5,000 shares

Expires 2025-02-12

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F5 · derivative.exercise_date: This stock option to acquire 5,000 shares of the Issuer's Common Stock was granted on February 12, 2015 and vested in full on March 5, 2015.

SEC source: 0001047127-24-000207 · wk-form4_1732311221.xml · nonDerivative · entry 2

KIM SUSAN Y · CIK 0001158922 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,441,475

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000207 · wk-form4_1732311221.xml · nonDerivative · entry 1

KIM SUSAN Y · CIK 0001158922 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,421,475

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 17

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 6,457 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F10 · derivative.exercise_price: On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited.

F10 · derivative.exercise_date: On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited.

F10 · derivative.expiration_date: On the 2024 Grant Date, the Reporting Person was granted 27,731 RSUs which were set to vest in three equal annual installments beginning on the first anniversary of the 2024 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2024 Grant Date were forfeited.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 16

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,639 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F9 · derivative.exercise_price: On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited.

F9 · derivative.exercise_date: On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited.

F9 · derivative.expiration_date: On the 2023 Grant Date, the Reporting Person was granted 9,279 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2023 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2023 Grant Date were forfeited.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 15

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,840 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F8 · derivative.exercise_price: On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited.

F8 · derivative.exercise_date: On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited.

F8 · derivative.expiration_date: On the 2022 Grant Date, the Reporting Person was granted 10,748 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2022 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2022 Grant Date were forfeited.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · derivative · entry 14

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,962 shares

Expires not disclosed

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F7 · derivative.exercise_price: On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited.

F7 · derivative.exercise_date: On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited.

F7 · derivative.expiration_date: On the 2021 Grant Date, the Reporting Person was granted 10,893 RSUs which were set to vest in four equal annual installments beginning on the first anniversary of the 2021 Grant Date. The transaction represents the vesting of a pro rata amount of RSUs in connection with the Reporting Person's retirement. The remaining unvested RSUs granted on the 2021 Grant Date were forfeited.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 8

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 149,628

F4 · kind: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 20, 2024 (the "2024 Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 7

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 152,372

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 6

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,915

F3 · kind: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 16, 2023 (the "2023 Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 5

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 146,612

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 4

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,973

F2 · kind: The transaction represents shares withheld by the Issuer in connection with the vesting of certain RSUs granted to the Reporting Person on February 24, 2022 (the "2022 Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 3

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 145,755

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 143,915

F1 · kind: The transaction represents shares withheld by Amkor Technology, Inc. (the "Issuer") in connection with the vesting of certain restricted stock units ("RSUs") granted to the Reporting Person on February 11, 2021 (the "2021 Grant Date") pursuant to the Issuer's 2007 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-24-000205 · wk-form4_1730756089.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (11)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 144,749

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000197 · wk-form4_1729197230.xml · nonDerivative · entry 1

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 204,971

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2024.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $31.26 to $31.70. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

SEC source: 0001047127-24-000183 · wk-form4_1727296740.xml · derivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000195 · wk-form4_1727299973.xml · derivative · entry 13

KIM SUSAN Y · CIK 0001158922 · Director · 10% owner · Member of 10% owner group (7)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F6 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F6 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F6 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000193 · wk-form4_1727297281.xml · derivative · entry 1

WATSON DAVID N · CIK 0001276908 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000191 · wk-form4_1727297197.xml · derivative · entry 1

Tily Gil C. · CIK 0001405591 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000189 · wk-form4_1727297089.xml · derivative · entry 2

Morse Robert Randolph · CIK 0001569086 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.exercise_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.expiration_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000189 · wk-form4_1727297089.xml · derivative · entry 1

Morse Robert Randolph · CIK 0001569086 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,610.4978

Underlying: Common Stock · 21.5229 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000187 · wk-form4_1727296979.xml · derivative · entry 2

McCourt MaryFrances · CIK 0001730724 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.exercise_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.expiration_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000187 · wk-form4_1727296979.xml · derivative · entry 1

McCourt MaryFrances · CIK 0001730724 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,610.4978

Underlying: Common Stock · 21.5229 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000185 · wk-form4_1727296889.xml · derivative · entry 1

Liao Daniel JL · CIK 0001775769 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000181 · wk-form4_1727296628.xml · derivative · entry 2

Carolin Roger Anthony · CIK 0001351909 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.exercise_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.expiration_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000181 · wk-form4_1727296628.xml · derivative · entry 1

Carolin Roger Anthony · CIK 0001351909 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,610.4978

Underlying: Common Stock · 21.5229 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000179 · wk-form4_1727296469.xml · derivative · entry 3

ALEXANDER DOUGLAS A · CIK 0001195858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 5,882.2486

Underlying: Common Stock · 14.864 shares

Expires not disclosed

F3 · derivative.exercise_price: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F3 · derivative.exercise_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F3 · derivative.expiration_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 14, 2024. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000179 · wk-form4_1727296469.xml · derivative · entry 2

ALEXANDER DOUGLAS A · CIK 0001195858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,610.4978

Underlying: Common Stock · 21.5229 shares

Expires not disclosed

F2 · derivative.exercise_price: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.exercise_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F2 · derivative.expiration_date: Represents DEUs accrued upon the payment of a dividend on September 23, 2024 with respect to RSUs of the Issuer granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000179 · wk-form4_1727296469.xml · derivative · entry 1

ALEXANDER DOUGLAS A · CIK 0001195858 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,945.4693

Underlying: Common Stock · 22.1019 shares

Expires not disclosed

F1 · derivative.exercise_price: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 17, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.exercise_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 17, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

F1 · derivative.expiration_date: Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 23, 2024 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 17, 2022. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.

SEC source: 0001047127-24-000175 · wk-form4_1726691672.xml · derivative · entry 3

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 8,125 shares

Expires 2030-07-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date.

SEC source: 0001047127-24-000175 · wk-form4_1726691672.xml · nonDerivative · entry 2

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 214,971

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on May 28, 2024.

SEC source: 0001047127-24-000175 · wk-form4_1726691672.xml · nonDerivative · entry 1

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 233,096

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000173 · wk-form4_1724963612.xml · derivative · entry 3

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,000 shares

Expires 2027-05-02

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F2 · derivative.exercise_date: This stock option to acquire 20,000 shares of the Issuer's common stock was granted on May 2, 2017 and vested in full on May 1, 2018.

SEC source: 0001047127-24-000173 · wk-form4_1724963612.xml · nonDerivative · entry 2

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,871

F1 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $32.96 to $33.01. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (1) to this Form 4.

SEC source: 0001047127-24-000173 · wk-form4_1724963612.xml · nonDerivative · entry 1

CHURCHILL WINSTON J · CIK 0000923792 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 39,871

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000171 · wk-form4_1724099591.xml · derivative · entry 3

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 8,125

Underlying: Common Stock · 15,000 shares

Expires 2030-07-30

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

F3 · derivative.exercise_date: This stock option to acquire 375,000 shares of the Issuer's common stock was granted on July 30, 2020 and vested in equal quarterly installments over three years, such that 100% of the option vested on the third anniversary of the grant date.

SEC source: 0001047127-24-000171 · wk-form4_1724099591.xml · nonDerivative · entry 2

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 224,971

F1 · kind: The sale reported in this Form 4 was effected pursuant to a Rule 10b5-1 trading plan adopted by the Reporting Person on November 8, 2023.

F2 · price: The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $32.16 to $32.82. The Reporting Person hereby undertakes to provide, upon request, to the staff of the Securities and Exchange Commission, Amkor Technology, Inc. (the "Issuer"), or any security holder of the Issuer, full information regarding the number of shares sold at each separate price within the range set forth in this footnote (2) to this Form 4.

SEC source: 0001047127-24-000171 · wk-form4_1724099591.xml · nonDerivative · entry 1

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: Plan reported

Ownership: Direct

Disclosed balance after: 249,971

Exercise/conversion can include RSU settlement. Transaction price and option strike are different fields; a missing price is not zero. Derivative and underlying rows can describe the same event.

SEC source: 0001047127-24-000167 · wk-form4_1723754409.xml · nonDerivative · entry 3

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

SEC source: 0001047127-24-000169 · wk-form4_1723754570.xml · nonDerivative · entry 1

Rutten Guillaume Marie Jean · CIK 0001596796 · Director · President and CEO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 234,971

F1 · kind: This Form 4 reports the vesting on August 13, 2024 of 106,638 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on December 14, 2023 pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the achievement of either of two internal performance goals related to geographic expansion of the Issuer's manufacturing footprint and expanding the Issuer's advanced packaging capacity in support of end markets with high growth potential.

SEC source: 0001047127-24-000167 · wk-form4_1723754409.xml · nonDerivative · entry 2

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 4,720

F2 · kind: 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.

SEC source: 0001047127-24-000167 · wk-form4_1723754409.xml · nonDerivative · entry 1

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,260

F1 · kind: This Form 4 reports the vesting on August 13, 2024 of 8,260 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on December 14, 2023 pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the achievement of either of two internal performance goals related to geographic expansion of the Issuer's manufacturing footprint and expanding the Issuer's advanced packaging capacity in support of end markets with high growth potential.

SEC source: 0001047127-24-000165 · wk-form4_1723754281.xml · nonDerivative · entry 2

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,427

F2 · kind: 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.

SEC source: 0001047127-24-000165 · wk-form4_1723754281.xml · nonDerivative · entry 1

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,614

F1 · kind: This Form 4 reports the vesting on August 13, 2024 of 8,260 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on December 14, 2023 pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the achievement of either of two internal performance goals related to geographic expansion of the Issuer's manufacturing footprint and expanding the Issuer's advanced packaging capacity in support of end markets with high growth potential.

SEC source: 0001047127-24-000163 · wk-form4_1723754158.xml · nonDerivative · entry 2

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 63,323

F2 · kind: 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.

SEC source: 0001047127-24-000163 · wk-form4_1723754158.xml · nonDerivative · entry 1

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 71,046

F1 · kind: This Form 4 reports the vesting on August 13, 2024 of 18,023 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on December 14, 2023 pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the achievement of either of two internal performance goals related to geographic expansion of the Issuer's manufacturing footprint and expanding the Issuer's advanced packaging capacity in support of end markets with high growth potential.

SEC source: 0001047127-24-000161 · wk-form4_1723753960.xml · nonDerivative · entry 2

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,000

F2 · kind: 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.

SEC source: 0001047127-24-000161 · wk-form4_1723753960.xml · nonDerivative · entry 1

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,540

F1 · kind: This Form 4 reports the vesting on August 13, 2024 of 8,260 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on December 14, 2023 pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the achievement of either of two internal performance goals related to geographic expansion of the Issuer's manufacturing footprint and expanding the Issuer's advanced packaging capacity in support of end markets with high growth potential.