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 for Agnes C. Kim
Issuer symbol: AMKR
Transactions as of: 20 Nov 2025
Net transactions value: $0
Form type: 4
Filing time: 24 Nov 2025, 20:57:57 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 Agnes C. 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 for Agnes C. Kim	24 Nov 2025	0002034104

Transactions Table

Type	Sym	Class	Transaction	Value $	Shares	Change %	* Price $	Shares After	Date	Ownership	Footnotes
transaction	AMKR	Common Stock	Gift	$0	-705,000	-44%	$0.000000	895,000	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 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024 distributed 705,000 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to the Agnes C. Kim Revocable Trust, of which Agnes C. Kim is the sole settlor, sole beneficiary, and sole trustee. Susan Y. Kim is the sole trustee of the 2024 Grantor Retained Annuity Trust of Agnes C. Kim 8/5/2024.

Remarks:

2. The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein, and this report shall not be deemed an admission that the Reporting Person is the beneficial owner of such securities, except to the extent of the Reporting Person's pecuniary interest therein, for purposes of Section 16 of the Securities Exchange Act of 1934, as amended ("Section 16"), or for any other purpose.