Amkor Insider Update: Kim Family Stake at 60.9M Shares After Dividend RSUs
Rhea-AI Filing Summary
Form 4 filing overview – Amkor Technology, Inc. (AMKR), filed 27 June 2025. The report covers insider Susan Y. Kim, who is listed as Director, 10% Owner, member of a 10%-owner group and holder of multiple family-related trusts and entities.
New transaction: On 25 June 2025 Kim acquired 38.5269 Restricted Stock Units (classified as dividend-equivalent units, “DEUs”) that accrued automatically on outstanding RSUs because Amkor paid a dividend the same day. The DEUs carry the same vesting terms as the original May 15 2025 RSU grant. No sales or cash purchases were reported.
Post-transaction beneficial ownership (non-derivative common shares):
- Directly held: 3,738,492 shares.
- Indirectly held via GRATs, family trusts and investment partnerships: 57,130,987 shares.
- Total reported beneficial interest: ≈60,869,479 common shares (subject to footnote disclaimers).
Post-transaction derivative holdings: 9,827.5269 RSUs (includes the newly added 38.5269 DEUs).
Key footnotes: (1-4) Kim serves as trustee, general partner or manager for multiple GRATs, trusts and LP/LLC vehicles; beneficial ownership is reported on a pecuniary-interest basis yet disclaimed where appropriate. (5) The only transaction is the automatic DEU accrual described above. (6) Filing does not admit beneficial ownership of securities held by other group members.
Investor takeaways: The filing reflects routine dividend-related RSU accretion and provides an updated snapshot of a large insider holding (~61 million shares). No open-market purchases or sales occurred, so immediate market impact is likely minimal.
Positive
- None.
Negative
- None.
Insights
TL;DR: Routine dividend-driven RSU accrual; no buying or selling, neutral impact.
The only reportable event is the issuance of 38.5269 DEUs tied to the 25 June 2025 dividend. Given Amkor’s ~250 million share float, the incremental dilution is de minimis (<0.00002%). The larger story is Susan Y. Kim’s continued control of roughly 61 million shares through a complex trust and partnership structure, reaffirming the Kim family’s dominant governance position. Because no cash outlay or disposition occurred, there is no directional trading signal. I classify the filing as informational, not price-moving.
TL;DR: Filing underscores concentrated family control; governance implications persist.
Kim’s aggregate stake, reported across GRATs, LPs, LLCs and direct holdings, approaches one-quarter of Amkor’s shares outstanding, sustaining the family’s veto-level influence over strategic decisions. The addition of 38.5269 DEUs is mechanistic and immaterial financially, but it updates the Section 16 ledger and illustrates rigorous compliance. Investors should note the layered entities—Sujochil LP, Kim Capital Partners, multiple GRATs—that insulate tax and estate exposure while consolidating voting power. While not impactful to valuation today, the governance concentration remains a structural risk/benefit depending on shareholder preferences.
Insider Trade Summary
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Grant/Award | Restricted Stock Units | 38.527 | $0.00 | -- |
| holding | Common Stock | -- | -- | -- |
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Footnotes (1)
- 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 is (i) a trustee of trusts for the benefit of her immediate family members (other than grantor retained annuity trusts ("GRATs")) which own 4,418,610 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 9,685,005 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 3,483,000 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; (Continued from Footnote 2) (v) a manager of a limited liability company being treated as a corporation for purposes of Section 16 which owns 16,710,668 shares of the Issuer's Common Stock and (vi) as referenced in Footnote 4, a member of Sujoda Management, LLC, which indirectly owns 3,347,890 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 The 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. Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 25, 2025 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
