2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 - 26 Dec 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
26 Dec 2025
Net transactions value
$0
Form type
4
Filing time
30 Dec 2025, 16:40:11 UTC
Previous filing
08 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 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 30 Dec 2025 0001994714

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMKR Common Stock Gift $0 -725,000 -100% $0.000000 0 26 Dec 2025 Direct F1
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 On December 26, 2025, the Reporting Person distributed 725,000 shares of common stock of Amkor, Inc. (the "Issuer") to the Susan Y. Kim 2023 Family Distribution Trust. John T. Kim and James J. Kim are co-trustees of the Susan Y. Kim 2023 Family Distribution Trust.

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.