Form 4: Amkor Technology Director Susan Y. Kim Discloses Significant Share Distributions from Family Trusts

Amkor Technology Director and 10% owner Susan Y. Kim reported the distribution of over 4.4 million shares of common stock from two family Grantor Retained Annuity Trusts (GRATs) to family members.

Summary

• Susan Y. Kim, a Director and 10% owner of Amkor Technology, Inc. (AMKR), reported changes in beneficial ownership.
• On July 30, 2025, the James J. Kim 2023 Grantor Retained Annuity Trust distributed 2,711,000 shares of Amkor Common Stock to James J. Kim.
• On the same date, the Agnes C. Kim 2023 Grantor Retained Annuity Trust distributed 1,738,000 shares of Amkor Common Stock to Agnes C. Kim.
• These distributions were reported as 'G' transactions (gifts/grants) with a price of $0 per share.
• Following these transactions, Susan Y. Kim's direct beneficial ownership is 3,738,492 shares.
• Her indirect beneficial ownership includes shares held by various family trusts (including GRATs), limited partnerships (Sujochil, LP, Sujoda Investments, LP), and limited liability companies (Kim Capital Partners KCP, LLC), totaling over 52 million shares across these entities.
• The reporting person disclaims beneficial ownership of these securities, except to the extent of her pecuniary interest, and the report is not an admission of beneficial ownership for Section 16 purposes.

Sentiment

Score: 5

Explanation: Neutral. This is a routine disclosure of pre-planned estate planning transactions (GRAT distributions) by a director and significant shareholder. It does not reflect on the company's operational performance or strategic direction.

Positives

• Continued substantial indirect ownership by the Kim family, indicating long-term alignment with company interests.

Risks

• The reporting person disclaims beneficial ownership of the reported securities, except to the extent of their pecuniary interest, which could imply a nuanced view on their direct control or influence over these shares.

Future Outlook

No forward-looking statements or guidance were provided in this filing.

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 filing is a routine insider transaction disclosure related to estate planning activities of a significant shareholder in Amkor Technology, a semiconductor packaging and test company. It does not directly reflect broader industry trends but highlights the ongoing management of substantial family holdings within the sector.

Related Party Transactions

• Distributions of 2,711,000 shares from James J. Kim 2023 GRAT to James J. Kim.
• Distributions of 1,738,000 shares from Agnes C. Kim 2023 GRAT to Agnes C. Kim.
• Ongoing indirect beneficial ownership through various family trusts, limited partnerships (Sujochil, LP, Sujoda Investments, LP), and limited liability companies (Kim Capital Partners KCP, LLC) where the reporting person has a trustee, general partner, or manager role.

Stakeholder Impact

• Shareholders: The filing indicates a shift in the direct beneficial ownership of a significant block of shares within the controlling family, but the overall family control and influence remain substantial. This is a routine estate planning event and typically has minimal direct impact on other shareholders.

Key Dates

Recommendation

This Form 4 filing details routine, pre-planned estate planning transactions (GRAT distributions) by a director and significant shareholder. It does not provide new information regarding the company's financial performance, strategic direction, or operational health. As such, it offers no basis for a change in investment recommendation, and a 'hold' stance is appropriate given the neutral nature of the disclosure.

Keywords

Amkor Technology, AMKR, SEC Form 4, Beneficial Ownership, Insider Transaction, Grantor Retained Annuity Trust, GRAT, Stock Distribution, Family Trust, Susan Y. Kim, 10% Owner, Director