SEC Form 4 · accession 0001628280-26-045577
AMKOR TECHNOLOGY, INC. · AMKR
Statement of changes in beneficial ownership, as filed. Original on EDGAR ↗
Reporting owner
Susan Y Kim
Director · 10% Owner · Other
Period of report
Jun 23, 2026
Accepted (ET)
Jun 25, 2026 · 4:50 pm EDT
Rule 10b5-1 plan
box not checked
Issuer CIK
0001047127
Table I — non-derivative securities
| Security | Date | Code | Shares | Price | A/D | Owned after | D/I | Nature of ownership |
|---|---|---|---|---|---|---|---|---|
| Common Stock | holding | — | — | — | 6,120,387 | D | ||
| Common StockF1,F2 | holding | — | — | — | 3,244,594 | I | 2025 Grantor Retained Annuity Trust No. 1 of James J. Kim | |
| Common StockF1,F2 | holding | — | — | — | 2,538,000 | I | 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim | |
| Common StockF1,F2 | holding | — | — | — | 1,235,000 | I | By James J. Kim 2024 GRAT dtd. 8/5/24 | |
| Common StockF1,F2 | holding | — | — | — | 895,000 | I | By Agnes C. Kim 2024 GRAT dtd. 8/5/24 | |
| Common StockF1,F2 | holding | — | — | — | 1,124,000 | I | By own GRATs | |
| Common StockF1,F2 | holding | — | — | — | 3,713,610 | I | By trusts (excl. GRATs) | |
| Common StockF1,F2,F3 | holding | — | — | — | 3,789,479 | I | By Sujoda Investments, LP | |
| Common StockF1,F2 | holding | — | — | — | 19,484,809 | I | By Sujochil, LP |
Table II — derivative securities
| Security | Conv. / exercise price | Date | Code | Shares | A/D | Exercisable | Expires | Underlying | Underlying shares | Owned after | D/I |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Restricted Stock UnitsF4 | $0.00 | Jun 23, 2026 | A | 3 | A | — | — | Common Stock | 3 | 2,616 | D |
Explanation of responses
- F1The 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 3,713,610 shares of the Common Stock of Amkor Technology, Inc. (the "Issuer"); (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,912,594 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 1,124,000 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; and (v) 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.
- F2The 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.
- F3The 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.
- F4Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
Remarks
(5) 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.