Form 4: Amkor Director Kim Reports Significant Stock Transfers

Susan Y. Kim, a Director and 10% owner of Amkor Technology, Inc., reported significant stock acquisitions and dispositions primarily through family trusts and partnerships.

Summary

• Susan Y. Kim, a Director and 10% owner of Amkor Technology, Inc. (AMKR), reported multiple transactions involving common stock on August 1, 2025.
• She directly acquired 438,002 shares from the James J. Kim 2023 Grantor Retained Annuity Trust (GRAT) and 280,000 shares from the Agnes C. Kim 2023 GRAT, both at a price of $0.
• These GRATs completed their distributions, resulting in 0 shares remaining in those specific trusts.
• Sujoda Investments, LP, an entity in which Ms. Kim has an indirect beneficial interest, acquired 441,589 shares at a price of $21.85.
• Following these transactions, Ms. Kim's direct beneficial ownership increased to 4,456,494 shares.
• Her indirect beneficial ownership includes substantial holdings through various entities: 19,484,809 shares via Sujochil, LP; 16,710,668 shares via Kim Capital Partners KCP, LLC; 4,418,610 shares via other trusts; 3,483,000 shares via her own GRATs; 2,200,000 shares via James J. Kim 2024 GRAT; 1,600,000 shares via Agnes C. Kim 2024 GRAT; and 3,789,479 shares via Sujoda Investments, LP.

Sentiment

Score: 5

Explanation: The sentiment is neutral. The filing primarily details internal family and trust-related stock transfers and a purchase by an indirectly controlled entity, which are standard wealth management activities and do not inherently signal strong positive or negative views on the company's immediate prospects.

Positives

• The acquisition of 441,589 shares by Sujoda Investments, LP at $21.85 indicates a purchase at a specific market price, potentially reflecting confidence in the company's valuation at that level.
• The structured nature of the GRAT distributions and other family transfers suggests organized estate planning and long-term family interest in the company.

Risks

• The reporting person disclaims beneficial ownership of certain reported securities, except to the extent of her pecuniary interest, which is a standard disclaimer but highlights the complex ownership structure.

Future Outlook

The filing does not contain forward-looking statements or guidance regarding the company's future performance or strategic direction, focusing solely on changes in beneficial ownership.

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 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 details internal ownership restructuring and estate planning activities by a key insider, rather than reflecting broader industry trends or competitive dynamics within the semiconductor packaging and test services sector.

Comparison to Industry Standards

• This filing primarily concerns internal family and trust-related stock transfers, which are common mechanisms for wealth management and estate planning among high-net-worth individuals and founding families in publicly traded companies.
• The transactions, particularly the GRAT distributions, are typical for managing large blocks of shares over time, similar to practices seen in other long-standing family-controlled or influenced companies across various industries, such as the Walton family's dealings with Walmart or the Ford family's with Ford Motor Company.
• The purchase by Sujoda Investments, LP at a specific price point is a direct investment, comparable to other insider purchases, though its impact is limited given the context of overall family holdings.

Related Party Transactions

• Acquisition of 438,002 shares from James J. Kim 2023 GRAT dtd. 4/26/23.
• Acquisition of 280,000 shares from Agnes C. Kim 2023 GRAT dtd. 4/26/23.
• Distribution of 438,002 shares from James J. Kim 2023 GRAT to John T. Kim and the Reporting Person.
• Distribution of 280,001 shares from Agnes C. Kim 2023 GRAT to John T. Kim and the Reporting Person.
• Acquisition of 441,589 shares by Sujoda Investments, LP from James J. Kim pursuant to a transaction between members of the Kim family group.
• Indirect beneficial ownership through various family trusts (including GRATs) and partnerships (Sujochil, LP, Kim Capital Partners KCP, LLC, Sujoda Investments, LP) where the Reporting Person serves as a trustee, general partner, or manager.

Stakeholder Impact

• Shareholders: The transactions represent a restructuring of significant insider holdings, which could be viewed as a long-term commitment by the founding family, but do not directly impact the company's operations or financial performance.
• Employees, Customers, Suppliers, Creditors: No direct impact is indicated by this filing, as it pertains solely to ownership structure.

Key Dates

Recommendation

The filing primarily details internal family and trust-related stock transfers and a purchase by an indirectly controlled entity. These transactions are part of long-term wealth management and estate planning by a significant insider and do not provide a strong signal for a 'buy' or 'sell' recommendation. The company's fundamentals and broader market conditions would be more relevant for an investment decision.

Keywords

Amkor Technology, AMKR, SEC Form 4, Insider Trading, Stock Ownership, Beneficial Ownership, GRAT, Trusts, Family Office, Semiconductor Packaging, Electronics Manufacturing