AGNES C. KIM - 26 Dec 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Role
Member of 10% owner group (3)
Signature
/s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim
Issuer symbol
AMKR
Transactions as of
26 Dec 2025
Net transactions value
$0
Form type
4
Filing time
30 Dec 2025, 16:39:36 UTC
Previous filing
23 Dec 2025
SEC
View on sec.gov

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
KIM AGNES C Member of 10% owner group (3) C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI /s/ Brian D. Short, Attorney-in-Fact for Agnes C. Kim 30 Dec 2025 0001158840

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMKR Common Stock Gift $0 +725,000 +7.2% $0.000000 10,737,355 26 Dec 2025 By Spouse F1, F2
holding AMKR Common Stock 0 26 Dec 2025 Direct
* 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 2023 Grantor Retained Annuity Trust of Susan Y. Kim Dated 9/15/2023 distributed 725,000 shares of common stock of Amkor, Inc. (the "Issuer") to the Susan Y. Kim 2023 Family Distribution Trust. The spouse of the Reporting Person, James J. Kim, is a co-trustee of the Susan Y. Kim 2023 Family Distribution Trust.
F2 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.

Remarks:

(3) 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, or for any other purpose.