CHURCHILL WINSTON J - 23 Dec 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: Director
Signature: /s/ Mark N. Rogers, Attorney-in-Fact for Winston J. Churchill
Issuer symbol: AMKR
Transactions as of: 23 Dec 2025
Net transactions value: $0
Form type: 4
Filing time: 29 Dec 2025, 08:27:36 UTC
Previous filing: 17 Dec 2025
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
CHURCHILL WINSTON J	Director	500 SE MIZNER BLVD., APT 305A, BOCA RATON	/s/ Mark N. Rogers, Attorney-in-Fact for Winston J. Churchill	26 Dec 2025	0000923792

Derivative Securities (e.g., puts, calls, warrants, options, convertible securities)

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Underlying Class	Amount	Exercise Price	Ownership	Footnotes
transaction	AMKR	Restricted Stock Units	Award	$0	+20	+0.2%	$0.000000	9,875	23 Dec 2025	Common Stock	20		Direct	F1

* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id	Content
F1	Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on December 23, 2025 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.