KIM SUSAN Y 4

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.