AMKOR TECHNOLOGY, INC. — Director's Dealing 2026

Feb 26, 2026

SEC Form 4 — Statement of Changes in Beneficial Ownership

Issuer: AMKOR TECHNOLOGY, INC. (AMKR)
CIK: 0001047127
Period of Report: 2026-02-24

Reporting Person: Haghighi Farshad (Executive Vice President)

Non-Derivative Transactions

Date	Security	Code	Shares	Price	A/D	Holdings After	Ownership
2026-02-24	Common Stock	M	1814	—	Acquired	24793	Direct
2026-02-24	Common Stock	F	815	$48.53	Disposed	23978	Direct
2026-02-25	Common Stock	S	15624	$50.50	Disposed	8354	Direct

Derivative Transactions

Date	Security	Exercise Price	Code	Shares	A/D	Expiration	Underlying	Ownership
2026-02-24	Restricted Stock Units	$0	M	1814	Disposed		Common Stock (1814)	Direct

Footnotes

F1: 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 24, 2022 (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.

F2: 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
than 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.