Form 4: Amkor Technology Director Susan Y. Kim Reports Extensive Beneficial Ownership and RSU Dividend Accrual

Susan Y. Kim, a Director and 10% Owner of Amkor Technology, Inc., filed a Form 4 detailing her direct and extensive indirect beneficial ownership of over 60 million common shares and the accrual of dividend equivalent units on her restricted stock units.

Summary

• Susan Y. Kim, a Director and 10% Owner of Amkor Technology, Inc. (AMKR), filed a Form 4 statement with the SEC.
• The filing reports her beneficial ownership of Amkor Technology common stock and derivative securities.
• As of the filing, Ms. Kim directly owns 3,738,492 shares of Common Stock.
• She also reports extensive indirect beneficial ownership totaling 57,129,982 shares through various entities, including family trusts, grantor retained annuity trusts (GRATs), limited partnerships (Sujochil, LP and Sujoda Investments, LP), and a limited liability company (Kim Capital Partners KCP, LLC).
• The total reported beneficial ownership of Common Stock, including direct and all indirect holdings, amounts to 60,868,474 shares.
• On June 25, 2025, Ms. Kim accrued 38.5269 dividend equivalent units (DEUs) related to a dividend payment on her time-vested restricted stock units (RSUs) that were granted on May 15, 2025.
• Following this transaction, her direct beneficial ownership of Restricted Stock Units is 9,827.5269.
• Ms. Kim disclaims beneficial ownership of certain securities except to the extent of her pecuniary interest therein, as per Section 16 of the Securities Exchange Act of 1934.

Sentiment

Score: 5

Explanation: The document is a routine regulatory filing detailing beneficial ownership and a minor accrual of dividend equivalent units. It does not contain information that would significantly alter the sentiment towards the company, reflecting a neutral stance.

Positives

• Increased transparency regarding the significant insider ownership structure of a key director and 10% owner.
• The accrual of dividend equivalent units indicates ongoing benefits from existing equity awards for the reporting person.

Risks

• The complexity of the indirect ownership structures, involving multiple trusts, limited partnerships, and limited liability companies, could make it challenging for external parties to fully ascertain the precise pecuniary interest and control, despite the reporting person's election to treat all shares as beneficially owned for Section 16 purposes.
• The extensive family and entity-based holdings, while common for large founding families, could lead to perceptions of potential conflicts of interest.

Future Outlook

NA

Industry Context

This Form 4 filing is a standard regulatory disclosure of insider ownership and does not provide broader industry context or trends. It reflects the individual holdings of a key insider at Amkor Technology, Inc., a leading provider of outsourced semiconductor packaging and test services.

Related Party Transactions

• The filing details extensive indirect beneficial ownership through various family trusts (James J. Kim 2024 GRAT, Agnes C. Kim 2024 GRAT, James J. Kim 2023 GRAT, Agnes C. Kim 2023 GRAT, other family trusts), the reporting person's own GRATs, and entities where the reporting person holds a management or general partner role (Sujoda Investments, LP, Sujochil, LP, Kim Capital Partners KCP, LLC). These represent significant holdings by entities related to the reporting person and her immediate family.

Stakeholder Impact

• Shareholders: Provides transparency regarding the significant beneficial ownership of a key insider, which can influence investor confidence and perception of alignment between management/large shareholders and common shareholders.

Key Dates

Keywords

Amkor Technology, AMKR, SEC Form 4, Insider Transaction, Beneficial Ownership, Susan Y. Kim, Director, 10% Owner, Restricted Stock Units, Dividend Equivalent Units, Equity Holdings, Trusts, Limited Partnerships, GRATs, Corporate Governance