AMKOR TECHNOLOGY, INC. · Gift received · Common Stock

What does this filing report?

An SEC Form 4 filing for AMKOR TECHNOLOGY, INC. records a gift received involving Common Stock on November 4, 2025. The reported quantity was 40,750. The filing date is November 6, 2025. This is one transaction record; amounts are not allocated among any joint reporting owners.

The acquisition category describes how securities were received. It does not by itself establish a cash purchase of common stock. Read the transaction code definitionsand the original filing before interpreting the amounts.

Filing footnotes & remarks

F1

On November 4, 2025, the John T. Kim 2024 GRAT #1 dtd. 08/09/2024 distributed 806,000 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to the Reporting Person. The Reporting Person is the sole trustee of the John T. Kim 2024 GRAT #1 dtd. 08/09/2024. Because the Reporting Person is the annuitant and sole trustee of the John T. Kim 2024 GRAT #1 dtd. 08/09/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

F2

On November 4, 2025, the John T. Kim 2024 GRAT #2 dtd. 08/09/2024 distributed 40,750 shares of the Common Stock of Amkor Technology, Inc (the "Issuer") to the Reporting Person. The Reporting Person is the sole trustee of the John T. Kim 2024 GRAT #2 dtd. 08/09/2024. Because the Reporting Person is the annuitant and sole trustee of the John T. Kim 2024 GRAT #2 dtd. 08/09/2024, the distribution was a mere change in the form of ownership from indirect to direct and thus being voluntarily reported by the Reporting Person on this Form 4.

F3

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

F4

(continued from Footnote 4) (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.

F5

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.

F6

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.

Footnotes are reproduced as plain text from the current source filing. For the full context, read the original SEC filing.