John T. Kim - 01 Aug 2025 Form 4 Insider Report for AMKOR TECHNOLOGY, INC. (AMKR)

Signature
/s/ Brian D. Short, Attorney-in-Fact for John T. Kim
Issuer symbol
AMKR
Transactions as of
01 Aug 2025
Net transactions value
+$9,648,720
Form type
4
Filing time
05 Aug 2025, 19:16:16 UTC
Previous filing
26 Feb 2025
Next filing
06 Nov 2025

Reporting Owners (1)

Name Relationship Address Signature Signature date CIK
KIM JOHN T Member of 10% owner group (8), 10%+ Owner C/O SIANA CARR O'CONNOR & LYNAM, 1500 EAST LANCASTER AVENUE, PAOLI /s/ Brian D. Short, Attorney-in-Fact for John T. Kim 05 Aug 2025 0001158926

Transactions Table

Type Sym Class Transaction Value $ Shares Change % * Price $ Shares After Date Ownership Footnotes
transaction AMKR Common Stock Gift $0 +438,002 +11% $0.000000 4,467,738 01 Aug 2025 Direct F1
transaction AMKR Common Stock Gift $0 +280,001 +6.3% $0.000000 4,747,739 01 Aug 2025 Direct F2
transaction AMKR Common Stock Purchase $9,648,720 +441,589 +13% $21.85 3,789,479 01 Aug 2025 By Sujoda Investments, LP F3, F4, F5, F6, F7
holding AMKR Common Stock 39,594,980 01 Aug 2025 By 915 Investments, LP F5, F6, F7
holding AMKR Common Stock 19,484,809 01 Aug 2025 By Sujochil, LP F5, F6, F7
holding AMKR Common Stock 16,710,668 01 Aug 2025 By Kim Capital Partners - KCP, LLC F5, F6, F7
holding AMKR Common Stock 9,121,944 01 Aug 2025 By trusts (other than GRAT & Rev. Trust) F5, F6, F7
holding AMKR Common Stock 2,100,000 01 Aug 2025 By own GRATs F5, F6, F7
* An asterisk sign (*) next to the price indicates that the price is likely invalid.

Explanation of Responses:

Id Content
F1 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.
F2 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 the Reporting Person.
F3 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.
F4 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.
F5 The Reporting Person is (i) a trustee of family trusts for the benefit of his immediate family members (other than Grantor Retained Annuity Trusts ("GRATS") which own 9,121,944 shares of the Issuer's Common Stock, (ii) a trustee of GRATs of which the Reporting Person was the settlor and is the sole annuitant which own 2,100,000 shares of the Issuer's Common Stock, (iii) a general partner of a limited partnership (Sujochil, LP) which owns 19,484,809 shares of the Issuer's Common Stock (iv) 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
F6 (continued from Footnote 5) (v) a general partner of a limited partnership which owns 39,594,980 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, 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.
F7 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:

(8) 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.