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AMKOR TECHNOLOGY, INC.·4

Jun 25, 4:50 PM ET

KIM SUSAN Y 4

4 · AMKOR TECHNOLOGY, INC. · Filed Jun 25, 2026

Research Summary

AI-generated summary of this filing

Updated

Amkor (AMKR) 10% Owner Susan Y. Kim Receives Award — 2.517 RSUs

What Happened
Susan Y. Kim, reported as a 10% owner of Amkor Technology, Inc. (AMKR), was credited with 2.517 dividend-equivalent units (DEUs) on June 23, 2026. These DEUs were recorded as awards/derivative acquisitions (code A) at $0.00 each and represent additional restricted stock units (RSUs) tied to RSUs previously granted on May 13, 2026.

Key Details

  • Transaction date: June 23, 2026; Form 4 filed June 25, 2026 (timely filing).
  • Transaction type: Award/derivative acquisition (DEUs converting to RSUs), 2.517 shares at $0.00.
  • Shares/units received: 2.517 DEUs (each DEU becomes an additional RSU subject to the same terms).
  • Reported holdings/pecuniary interest after transaction: reporting person treated as having a pecuniary interest in 36,024,492 shares (aggregate across trusts and entities noted in footnotes); the 2.517 RSUs were added as derivative units.
  • Notable footnotes:
    • F4: DEUs accrued upon the dividend payment on June 23, 2026 and relate to RSUs granted May 13, 2026.
    • F1–F3 & F2: Kim is a trustee/partner/member of multiple trusts and entities; she disclaims beneficial ownership except to the extent of her pecuniary interest and is electing to treat shares held by related entities as her pecuniary interest.
    • Remarks note the filing should not be construed as admission of beneficial ownership beyond pecuniary interest.

Context

  • This is a non-cash award (dividend equivalents converted to RSUs), not an open-market purchase or sale. Such grants reflect dividend accruals on existing time‑vested RSUs and do not by themselves indicate a buy or sell decision in the open market.
  • Because Kim is a reported 10% owner with holdings routed through trusts and partnerships, the filing focuses on pecuniary interest and includes standard disclaimers about beneficial ownership.

Insider Transaction Report

Form 4
Period: 2026-06-23
AMKOR TECHNOLOGY, INC.AMKR
KIM SUSAN Y
Director10% OwnerOther
Transactions
  • Award

    Restricted Stock Units

    [F4]
    2026-06-23+2.517→ 2,615.517 total
    Exercise: $0.00→ Common Stock (2.517 underlying)
Holdings

  • Common Stock

    6,120,387

  • Common Stock

    [F1][F2]
    (indirect: By Trust)
    3,244,594

  • Common Stock

    [F1][F2]
    (indirect: By Trust)
    2,538,000

  • Common Stock

    [F1][F2]
    (indirect: By James J. Kim 2024 GRAT dtd. 8/5/24)
    1,235,000

  • Common Stock

    [F1][F2]
    (indirect: By Agnes C. Kim 2024 GRAT dtd. 8/5/24)
    895,000

  • Common Stock

    [F1][F2]
    (indirect: By own GRATs)
    1,124,000

  • Common Stock

    [F1][F2]
    (indirect: By Trust)
    3,713,610

  • Common Stock

    [F1][F2][F3]
    (indirect: By Sujoda Investments, LP)
    3,789,479

  • Common Stock

    [F1][F2]
    (indirect: By Sujochil, LP)
    19,484,809
Footnotes (4)
  • [F1]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 Common Stock of Amkor Technology, Inc. (the "Issuer"); (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.
  • [F2]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.
  • [F3]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.
  • [F4]Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on June 23, 2026 with respect to time-vested restricted stock units ("RSUs") of the Issuer granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued.
Signature
/s/ Mark N. Rogers, Attorney-in-Fact for Susan Y. Kim|2026-06-25

Documents

1 file
  • 4
    wk-form4_1782420649.xmlPrimary

    FORM 4