2024 - 20 Nov 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role: Member of 10% owner group (2)
Signature: /s/ Brian D. Short, Attorney-in-Fact
Issuer symbol: AMKR
Transactions as of: 20 Nov 2025
Net transactions value: $0
Form type: 4
Filing time: 24 Nov 2025, 20:58:16 UTC
Previous filing: 15 Aug 2024
SEC: View on sec.gov

Reporting Owners (1)

Name	Relationship	Address	Signature	Signature date	CIK
2024 Grantor Retained Annuity Trust of Susan Y. Kim dtd. 8/5/2024	Member of 10% owner group (2)	C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI	/s/ Brian D. Short, Attorney-in-Fact	24 Nov 2025	0002034102

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMKR	Common Stock	Gift	$0	-876,000	-44%	$0.000000	1,124,000	20 Nov 2025	Direct	F1

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

Explanation of Responses:

Id	Content
F1	On November 20, 2025, the Reporting Person distributed 876,000 shares of the Common Stock of Amkor Technology, Inc. to Susan Y. Kim. Susan Y. Kim is the sole trustee of the Reporting Person. Because Susan. Y. Kim is the annuitant and sole trustee of the Reporting Person, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

Content

On November 20, 2025, the Reporting Person distributed 876,000 shares of the Common Stock of Amkor Technology, Inc. to Susan Y. Kim. Susan Y. Kim is the sole trustee of the Reporting Person. Because Susan. Y. Kim is the annuitant and sole trustee of the Reporting Person, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

Remarks:

(2) The Reporting Person states that the filing of this Form 4 shall not be deemed an admission that the Reporting Person is the beneficial owner of the reported securities owned by the other members of the group, for the purpose of Section 16, or for any other purpose.