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Filing Details

Accession Number:: 0001158922-25-000013
Form Type:: 4
Zero Holdings:: No
Publication Time:: 2025-08-05 19:09:10
Reporting Period:: 2025-08-01

Filing Date:: 2025-08-05
Accepted Time:: 2025-08-05 19:09:10
SEC Url:: Form 4 Filing

Issuer

Cik	Name	Symbol	Sector (SIC)	IRS No
1047127	Amkor Technology Inc.	AMKR	()

Insiders

Cik	Name	Reported Address	Insider Title	Director	Officer	Large Shareholder	Other
1158922	Y Susan Kim	C/O Siana Carr O'Connor &Amp; Lynam 1500 East Lancaster Avenue Paoli PA 19301-9713		Yes	No	Yes	Yes

Transaction Summary

Purchased:	441,589 shares	Avg. Price: $21.85	Total Value: $9,648,719.65
Number of Shares After Transactions:	3,789,479 shares

Reported Non-Derivative Transactions

Show Other Fields >>

Sec. Name	Acquisiton - Disposition	Date	Amount	Price	Remaning Holdings	Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
Common Stock	Acquisiton	2025-08-01	438,002	$0.00	4,176,494	No	4	G	Direct
Common Stock	Acquisiton	2025-08-01	280,000	$0.00	4,456,494	No	4	G	Direct
Common Stock	Disposition	2025-08-01	438,002	$0.00	438,002	No	4	G	Indirect	By James J. Kim 2023 GRAT dtd. 4/26/23
Common Stock	Disposition	2025-08-01	438,002	$0.00	0	No	4	G	Indirect	By James J. Kim 2023 GRAT dtd. 4/26/23
Common Stock	Disposition	2025-08-01	280,000	$0.00	280,001	No	4	G	Indirect	By Agnes C. Kim 2023 GRAT dtd. 4/26/23
Common Stock	Disposition	2025-08-01	280,001	$0.00	0	No	4	G	Indirect	By Agnes C. Kim 2023 GRAT dtd. 4/26/23
Common Stock	Acquisiton	2025-08-01	441,589	$21.85	3,789,479	No	4	P	Indirect	By Sujoda Investments, LP

Equity Swap Involved	Form Type	Code	Nature of Ownership	Explanation
No	4	G	Direct
No	4	G	Direct
No	4	G	Indirect	By James J. Kim 2023 GRAT dtd. 4/26/23
No	4	G	Indirect	By James J. Kim 2023 GRAT dtd. 4/26/23
No	4	G	Indirect	By Agnes C. Kim 2023 GRAT dtd. 4/26/23
No	4	G	Indirect	By Agnes C. Kim 2023 GRAT dtd. 4/26/23
No	4	P	Indirect	By Sujoda Investments, LP

Reported Non-Derivative Holdings

Sec. Name	Remaning Holdings	Nature of Ownership	Explanation
Common Stock	19,484,809	Indirect	By Sujochil, LP
Common Stock	16,710,668	Indirect	By Kim Capital Partners - KCP, LLC
Common Stock	4,418,610	Indirect	By trusts (excl. GRATs)
Common Stock	3,483,000	Indirect	By own GRATs
Common Stock	2,200,000	Indirect	By James J. Kim 2024 GRAT dtd. 8/5/24
Common Stock	1,600,000	Indirect	By Agnes C. Kim 2024 GRAT dtd. 8/5/24

Footnotes

On August 1, 2025 the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer") to the Reporting Person.
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.
On August 1, 2025 the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,000 shares of the Common Stock of the Issuer to the Reporting Person.
On August 1, 2025, the 2023 Grantor Retained Annuity Trust of James J. Kim Dated 4/26/2023 distributed 438,002 shares of the Common Stock of the Issuer to John T. Kim and 438,002 shares of the Common Stock of the Issuer to the Reporting Person.
The Reporting Person is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts ("GRATs")) which own 4,418,610 shares of the Common Stock of the Issuer); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 3,800,000 shares of the Issuer's Common Stock; (iii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 3,483,000 shares of the Issuer's Common Stock; (iv) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock;
(Continued from Footnote 5) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 9, below, a member of Sujoda Management, LLC, which indirectly owns 3,789,479 shares of the Issuer's Common Stock. Pursuant to the Form 4 instructions, the Reporting Person is being treated as having a pecuniary interest in all of such shares.
On August 1, 2025, the 2023 Grantor Retained Annuity Trust of Agnes C. Kim Dated 4/26/2023 distributed 280,001 shares of the Common Stock of the Issuer to John T. Kim and 280,000 shares of the Common Stock of the Issuer to the Reporting Person.
On August 1, 2025, James J. Kim distributed 441,589 shares of the Common Stock of the Issuer to Sujoda Investments, LP pursuant to the terms of a transaction between members of the Kim family group.
The sole general partner of Sujoda Investments, LP is Sujoda Management, LLC. The Reporting Person is one of three members of Sujoda Management, LLC. Sujoda Management, LLC is being treated as a limited partnership for purposes of Section 16, and, pursuant to the Form 4 instructions, the Reporting Person has elected to treat all of the shares of the Issuer's Common Stock owned by Sujoda Investments, LP as beneficially owned by the Reporting Person.