AMKR

SEC source: 0001047127-25-000038 · wk-form4_1740174197.xml · nonDerivative · entry 3

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 87,343

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: 0001047127-25-000034 · wk-form4_1740173814.xml · derivative · entry 6

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,594

Underlying: Common Stock · 32,594 shares

Expires not disclosed

F5 · derivative.exercise_date: Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the "2025 Grant Date") pursuant to the Issuer's Equity Incentive Plan, as amended. 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.

F5 · derivative.expiration_date: Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the "2025 Grant Date") pursuant to the Issuer's Equity Incentive Plan, as amended. 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.

SEC source: 0001047127-25-000034 · wk-form4_1740173814.xml · derivative · entry 5

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,846

Underlying: Common Stock · 7,152 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001047127-25-000034 · wk-form4_1740173814.xml · nonDerivative · entry 4

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 19,142

F3 · kind: 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. 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: 0001047127-25-000034 · wk-form4_1740173814.xml · nonDerivative · entry 3

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 22,382

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: 0001047127-25-000032 · wk-form4_1740173710.xml · derivative · entry 6

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 26,075

Underlying: Common Stock · 26,075 shares

Expires not disclosed

F5 · derivative.exercise_date: Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the "2025 Grant Date") pursuant to the Issuer's Equity Incentive Plan, as amended. 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.

F5 · derivative.expiration_date: Represents shares of the Issuer's common stock underlying time-vested RSUs granted on February 20, 2025 (the "2025 Grant Date") pursuant to the Issuer's Equity Incentive Plan, as amended. 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.

SEC source: 0001047127-25-000032 · wk-form4_1740173710.xml · derivative · entry 5

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,846

Underlying: Common Stock · 7,422 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.

F4 · derivative.exercise_date: 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.

F4 · derivative.expiration_date: 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.

SEC source: 0001047127-25-000032 · wk-form4_1740173710.xml · nonDerivative · entry 4

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 37,788

F3 · kind: 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. 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: 0001047127-25-000032 · wk-form4_1740173710.xml · nonDerivative · entry 3

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 40,969

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: 0001047127-25-000042 · wk-form4_1740174405.xml · nonDerivative · entry 2

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 941,393

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: 0001047127-25-000042 · wk-form4_1740174405.xml · nonDerivative · entry 1

KIM JAMES J · CIK 0001158839 · 10% owner · Member of 10% owner group (5)

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 942,921

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 3,196 shares of Common Stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

SEC source: 0001047127-25-000040 · wk-form4_1740174289.xml · nonDerivative · entry 2

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,637

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: 0001047127-25-000040 · wk-form4_1740174289.xml · nonDerivative · entry 1

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,980

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 2,731 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

SEC source: 0001047127-25-000036 · wk-form4_1740174105.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: 235,627

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 16,736 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

SEC source: 0001047127-25-000038 · wk-form4_1740174197.xml · nonDerivative · entry 2

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 70,538

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: 0001047127-25-000038 · wk-form4_1740174197.xml · nonDerivative · entry 1

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 73,526

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 6,973 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

SEC source: 0001047127-25-000034 · wk-form4_1740173814.xml · nonDerivative · entry 2

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 15,230

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: 0001047127-25-000034 · wk-form4_1740173814.xml · nonDerivative · entry 1

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 16,841

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 3,080 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

SEC source: 0001047127-25-000032 · wk-form4_1740173710.xml · nonDerivative · entry 2

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 33,547

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: 0001047127-25-000032 · wk-form4_1740173710.xml · nonDerivative · entry 1

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 34,889

F1 · kind: This Form 4 reports the vesting on February 19, 2025 of 3,080 shares of common stock of Amkor Technology, Inc. (the "Issuer") underlying performance-vested restricted stock units ("PSUs") granted to the Reporting Person on February 20, 2024 pursuant to the Issuer's Equity Incentive Plan, as amended, and the related award agreement. The PSUs vested based on the attainment of a basic earnings per share performance goal over a one-year performance period beginning January 1, 2024 and ending on December 31, 2024.

SEC source: 0001047127-25-000025 · wk-form4_1740001420.xml · derivative · entry 3

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 2,783

Underlying: Common Stock · 1,345 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 5,567 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 5,567 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000025 · wk-form4_1740001420.xml · nonDerivative · entry 2

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,249

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 16, 2023 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000025 · wk-form4_1740001420.xml · nonDerivative · entry 1

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 1,808

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: 0001047127-25-000023 · wk-form4_1740001327.xml · derivative · entry 3

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 8,351

Underlying: Common Stock · 4,176 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 16,703 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 16,703 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000023 · wk-form4_1740001327.xml · nonDerivative · entry 2

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 66,553

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 16, 2023 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000023 · wk-form4_1740001327.xml · nonDerivative · entry 1

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,487

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: 0001047127-25-000019 · wk-form4_1740001140.xml · derivative · entry 2

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

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 27,839

Underlying: Common Stock · 13,920 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.

F1 · derivative.exercise_date: On February 16, 2023 (the "Grant Date"), the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F1 · derivative.expiration_date: On February 16, 2023 (the "Grant Date"), the Reporting Person was granted 55,679 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000019 · wk-form4_1740001140.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: 218,891

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: 0001047127-25-000021 · wk-form4_1740001237.xml · derivative · entry 3

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,711

Underlying: Common Stock · 1,789 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 7,423 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 7,423 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000021 · wk-form4_1740001237.xml · nonDerivative · entry 2

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,761

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 16, 2023 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000021 · wk-form4_1740001237.xml · nonDerivative · entry 1

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 14,574

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: 0001047127-25-000017 · wk-form4_1740000952.xml · derivative · entry 3

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 3,711

Underlying: Common Stock · 1,856 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 7,423 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 7,423 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date

SEC source: 0001047127-25-000017 · wk-form4_1740000952.xml · nonDerivative · entry 2

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,809

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 16, 2023 (the "Grant Date") pursuant to the Issuer's 2021 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000017 · wk-form4_1740000952.xml · nonDerivative · entry 1

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 32,703

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: 0001047127-25-000015 · wk-form4_1739486098.xml · derivative · entry 4

Carolin Roger Anthony · CIK 0001351909 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 20,000 shares

Expires 2026-05-04

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 4, 2016 and vested in full on May 2, 2017.

SEC source: 0001047127-25-000015 · wk-form4_1739486098.xml · derivative · entry 3

Carolin Roger Anthony · CIK 0001351909 · Director

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.

F1 · derivative.exercise_date: This stock option to acquire 20,000 shares of Amkor Technology, Inc. (the "Issuer") Common Stock was granted on May 5, 2015 and vested in full on May 4, 2016.

SEC source: 0001047127-25-000015 · wk-form4_1739486098.xml · nonDerivative · entry 2

Carolin Roger Anthony · CIK 0001351909 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 88,392

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: 0001047127-25-000015 · wk-form4_1739486098.xml · nonDerivative · entry 1

Carolin Roger Anthony · CIK 0001351909 · Director

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 68,392

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: 0001047127-25-000013 · wk-form4_1739485934.xml · derivative · entry 3

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 656 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 2,723 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 2,723 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000013 · wk-form4_1739485934.xml · nonDerivative · entry 2

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 12,785

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 "Grant Date") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000013 · wk-form4_1739485934.xml · nonDerivative · entry 1

Haghighi Farshad · CIK 0001887579 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 13,083

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: 0001047127-25-000011 · wk-form4_1739485740.xml · derivative · entry 3

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 790 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 3,268 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 3,268 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000011 · wk-form4_1739485740.xml · nonDerivative · entry 2

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 463

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 "Grant Date") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000011 · wk-form4_1739485740.xml · nonDerivative · entry 1

Engel Kevin · CIK 0001965254 · Executive Vice President

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 790

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: 0001047127-25-000009 · wk-form4_1739485646.xml · derivative · entry 3

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,634 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 6,536 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 6,536 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000009 · wk-form4_1739485646.xml · nonDerivative · entry 2

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 30,847

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 "Grant Date") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000009 · wk-form4_1739485646.xml · nonDerivative · entry 1

ROGERS MARK N · CIK 0001201997 · EVP & General Counsel

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 31,634

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: 0001047127-25-000007 · wk-form4_1739485500.xml · derivative · entry 3

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 0

Underlying: Common Stock · 1,906 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.

F2 · derivative.exercise_date: On the Grant Date, the Reporting Person was granted 7,625 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

F2 · derivative.expiration_date: On the Grant Date, the Reporting Person was granted 7,625 RSUs which vest in four equal annual installments beginning on the first anniversary of the Grant Date.

SEC source: 0001047127-25-000007 · wk-form4_1739485500.xml · nonDerivative · entry 2

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 64,311

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 "Grant Date") pursuant to the Issuer's Second Amended and Restated 2007 Equity Incentive Plan, as amended, and the related award agreement. These shares were withheld to satisfy the Reporting Person's tax withholding obligations. The Issuer will pay these taxes on behalf of the Reporting Person.

SEC source: 0001047127-25-000007 · wk-form4_1739485500.xml · nonDerivative · entry 1

Faust Megan · CIK 0001684564 · CFO

10b5-1 filing: No plan indicated

Ownership: Direct

Disclosed balance after: 65,229

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.