Susan Kim (NASDAQ: AMKR) reports RSU vesting and new 2026 RSU grant
Filing Impact
Filing Sentiment
Form Type
4
Rhea-AI Filing Summary
AMKOR TECHNOLOGY, INC. director and 10% owner group member Susan Y. Kim reported routine equity compensation activity. On May 13, 2026, she exercised 9,893.0573 restricted stock units granted in 2025, with a small 0.0573-unit portion settled in cash and the remainder converting into common stock within 30 days.
On the same date, she received a new grant of 2,613 restricted stock units under Amkor’s 2021 Equity Incentive Plan, vesting on the earlier of one year from grant or the next annual shareholder meeting, for no consideration other than board service. Entities associated with her, including Sujochil, LP and Sujoda Investments, LP, as well as various trusts and GRATs, are treated as beneficially owning large blocks of Amkor common stock, though she disclaims beneficial ownership beyond her pecuniary interest.
Positive
- None.
Negative
- None.
Insider Trade Summary
9,893.057 shares exercised/converted
Mixed
11 txns
Insider
KIM SUSAN Y
Role
null
| Type | Security | Shares | Price | Value |
|---|---|---|---|---|
| Exercise | Restricted Stock Units | 9,893.057 | $0.00 | -- |
| Grant/Award | Restricted Stock Units | 2,613 | $0.00 | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
| holding | Common Stock | -- | -- | -- |
Holdings After Transaction:
Restricted Stock Units — 0 shares (Direct, null);
Common Stock — 6,110,494 shares (Direct, null);
Common Stock — 3,244,594 shares (Indirect, 2025 Grantor Retained Annuity Trust No. 1 of James J. Kim)
Footnotes (1)
- 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 3,713,610 shares of the Issuer's Common Stock; (ii) a trustee of GRATs for the benefit of members of her immediate family which own 7,912,594 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 1,124,000 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; and (v) a member of Sujoda Management, LLC, which indirectly owns 3,789,479 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 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 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. On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs") pursuant to the Amkor Technology, Inc. (the "Issuer") 2021 Equity Incentive Plan, as amended (the "Plan"), and the applicable award agreement (the "2025 RSUs"). In connection with the vesting of the 2025 RSUs on May 13, 2026 (the "Vesting Date"): (i) 0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs") with each DEU representing an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued, were settled in cash; and (ii) the remainder of the 2025 RSUs, including 104 DEUs, will convert into common stock of the Issuer on a one-for-one basis within 30 days of the Vesting Date or will otherwise be settled in cash. Represents shares of common stock underlying RSUs granted on May 13, 2026 (the "Grant Date") pursuant to the Plan (the "2026 RSUs"). Subject to the terms and conditions of the applicable award agreement, the 2026 RSUs may be converted into common stock of the Issuer on a one-for-one basis and will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of stockholders immediately following the Grant Date. The 2026 RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer.
Key Figures
2025 RSUs exercised: 9,893.0573 units
2026 RSU grant: 2,613 units
Sujochil, LP holdings: 19,484,809 shares
+5 more
8 metrics
2025 RSUs exercised
9,893.0573 units
Time-vested restricted stock units vested on May 13, 2026
2026 RSU grant
2,613 units
New RSUs granted May 13, 2026 for director service
Sujochil, LP holdings
19,484,809 shares
Common stock held by Sujochil, LP, treated as beneficially owned
Sujoda Investments, LP holdings
3,789,479 shares
Common stock owned by Sujoda Investments, LP via Sujoda Management, LLC
Trusts (excluding GRATs)
3,713,610 shares
Common stock in family trusts other than GRATs
Family GRATs holdings
7,912,594 shares
Common stock in GRATs for immediate family members
Own GRATs holdings
1,124,000 shares
Common stock in GRATs where she is settlor and sole annuitant
Direct holdings
6,110,494 shares
Common stock held directly as of May 13, 2026
Key Terms
restricted stock units ("RSUs"), dividend equivalent units ("DEUs"), Grantor Retained Annuity Trust, pecuniary interest, +2 more
6 terms
restricted stock units ("RSUs") financial
"On May 15, 2025, the Reporting Person was granted 9,789 time-vested restricted stock units ("RSUs")"
Restricted stock units (RSUs) are a company promise to give an employee shares of stock (or cash equivalent) in the future, but only after certain conditions—usually staying with the company for a set time or hitting performance goals—are met. Investors watch RSUs because when they vest they increase the number of shares outstanding and can lead insiders to sell shares, affecting share price, company dilution and the true cost of employee pay.
dividend equivalent units ("DEUs") financial
"0.0573 of the 2025 RSUs, which had accrued as dividend equivalent units ("DEUs")"
Grantor Retained Annuity Trust financial
"2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim"
A grantor retained annuity trust (GRAT) is an estate-planning tool where the person who creates the trust transfers assets into it but receives fixed cash payments (an annuity) from the trust for a set number of years; whatever remains after that term passes to designated beneficiaries. It matters to investors because it can shift future appreciation of assets out of the creator’s taxable estate—like putting an asset into a timed vending machine that pays you fixed amounts while any extra value that grows inside the machine goes to heirs with reduced gift or estate tax consequences.
pecuniary interest financial
"treated as having a pecuniary interest in all of such shares"
beneficial ownership financial
"The Reporting Person disclaims beneficial ownership of these securities, except to the extent of the Reporting Person's pecuniary interest therein"
Beneficial ownership means the person or entity that actually enjoys the benefits of owning shares or other assets — such as receiving dividends, voting rights, or price gains — even if the legal title is held in another name. For investors it matters because knowing who truly controls and profits from a company reveals who can influence decisions, exposes potential conflicts of interest or hidden concentration of power, and affects transparency and risk in the stock.
Section 16 regulatory
"for purposes of Section 16 of the Securities Exchange Act of 1934"
Section 16 is a U.S. securities law rule that governs the trading and disclosure obligations of company insiders — typically officers, directors and large shareholders — to promote transparency and deter unfair profit-taking. It requires insiders to publicly report their stock trades and allows companies or the issuer to reclaim quick, short-term profits from certain insider trades, like a scoreboard and a refund policy that help investors see and limit possible insider advantage.
FAQ
What insider transactions did Susan Y. Kim report for AMKR on May 13, 2026?
Susan Y. Kim reported routine equity compensation activity, not open-market trading. She exercised 9,893.0573 restricted stock units from a 2025 grant and received a new 2,613-unit RSU award, both tied to her service as a director under Amkor’s 2021 Equity Incentive Plan.
How many Amkor 2025 RSUs vested for Susan Y. Kim and how were they settled?
A 2025 award of 9,789 restricted stock units vested for Susan Y. Kim. Of these, 0.0573 units of related dividend equivalent units were settled in cash, and the remaining RSUs, including 104 DEUs, will convert one-for-one into common stock or be settled in cash within 30 days.
What new restricted stock units did Susan Y. Kim receive from Amkor in 2026?
On May 13, 2026, Susan Y. Kim received 2,613 restricted stock units under Amkor’s 2021 Equity Incentive Plan. These 2026 RSUs vest in full on the earlier of the first anniversary of the grant date or the next annual shareholder meeting and were awarded solely for her service as a director.
Are there any open-market Amkor stock purchases or sales by Susan Y. Kim here?
No open-market buys or sells are reported. The only transaction codes with share changes are an RSU grant (code A) and an RSU exercise/conversion (code M). The other entries simply show holdings across various entities and trusts as of May 13, 2026.