Form 4: Amkor Director Susan Y. Kim Reports GRAT Share Distribution

Susan Y. Kim, a Director and 10% Owner of Amkor Technology, reported a disposition of 725,000 common shares from a grantor retained annuity trust.

Summary

• Susan Y. Kim, a Director and 10% Owner of Amkor Technology, Inc. (AMKR), reported a transaction on December 26, 2025.
• The transaction involved the disposition of 725,000 shares of common stock via a gift (G transaction code) with a price of $0.
• The shares were distributed from the 2023 Grantor Retained Annuity Trust dated 9/15/2023, for which Susan Y. Kim is a trustee, to the Susan Y. Kim 2023 Family Distribution Trust.
• Following this transaction, Susan Y. Kim's direct beneficial ownership stands at 6,090,494 shares of Common Stock.
• Indirect beneficial ownership totals 52,035,160 shares, held through various entities including her own GRATs (1,124,000 shares), Sujochil, LP (19,484,809 shares), Kim Capital Partners KCP, LLC (16,710,668 shares), Sujoda Investments, LP (3,789,479 shares), other trusts (3,713,610 shares), and several 2024 and 2025 Grantor Retained Annuity Trusts for James J. Kim and Agnes C. Kim (totaling 7,912,594 shares).
• The total beneficial ownership reported by Susan Y. Kim following the transaction is 58,125,654 shares.
• Susan Y. Kim disclaims beneficial ownership of these securities, except to the extent of her pecuniary interest, and states that the filing does not admit beneficial ownership of securities owned by other group members for Section 16 purposes.

Sentiment

Score: 5

Explanation: This is a routine insider transaction filing (Form 4) reporting a distribution from a grantor retained annuity trust (GRAT). It reflects estate planning rather than a direct positive or negative operational event for the company. The reporting person maintains significant beneficial ownership.

Positives

• NA

Negatives

• NA

Future Outlook

This filing is a report of an insider transaction and does not contain any forward-looking statements or guidance regarding the company's future performance or outlook.

Management Comments

• "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."
• "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."

Industry Context

This Form 4 filing reports a specific insider transaction related to estate planning and does not provide information directly relevant to broader industry trends or competitive dynamics within the semiconductor packaging and test services sector.

Related Party Transactions

• The distribution of 725,000 shares from the 2023 Grantor Retained Annuity Trust (where Susan Y. Kim is a trustee) to the Susan Y. Kim 2023 Family Distribution Trust involves related parties (family trusts).

Stakeholder Impact

• Shareholders: The filing indicates continued significant beneficial ownership by a key insider, which can be viewed as alignment of interests, although the specific transaction is an estate planning move.
• Employees, Customers, Suppliers, Creditors: No direct impact on these stakeholders is indicated by this insider transaction report.

Key Dates

Recommendation

The Form 4 reports a routine insider transaction involving the distribution of shares from a grantor retained annuity trust (GRAT) to a family trust. This is primarily an estate planning event for a significant insider and does not reflect on the operational performance or strategic direction of Amkor Technology, Inc. The reporting person, Susan Y. Kim, remains a substantial beneficial owner, which can be viewed as a positive for long-term alignment, but this specific transaction does not provide new information to alter an investment thesis. Therefore, a 'hold' recommendation is appropriate as the filing itself does not present new fundamental drivers for a 'buy' or 'sell' decision.

Keywords

AMKR, Amkor Technology, Susan Y. Kim, Form 4, insider transaction, beneficial ownership, stock distribution, GRAT, estate planning