Amkor (AMKR) 10% Owner Susan Y. Kim Receives 4 Dividend-Equivalent RSUs

What Happened

• Susan Y. Kim, a 10% owner of Amkor Technology, Inc. (AMKR) and trustee for related family trusts/vehicles, received 3.998 dividend equivalent units (DEUs) on September 22, 2026. The DEUs were granted at $0.00 (no cash paid) and represent additional restricted stock units (RSUs). Total reported value of this specific award: $0 (derivative award).
• This was an award/adjustment tied to previously granted time-vested RSUs (i.e., not an open-market buy or sale), so it’s a neutral/administrative grant rather than a purchase signaling new share accumulation.

Key Details

• Transaction date: 2026-09-22; Filing date: 2026-09-24 (timely Form 4; within standard 2-business-day window).
• Transaction code: A (award/grant); shares acquired: 3.998 DEUs at $0.00 each.
• Reported pecuniary interest: per footnotes, the Reporting Person is treated as having a pecuniary interest in 36,024,492 shares held across trusts and entities (see F1). The Reporting Person disclaims direct beneficial ownership except to the extent of pecuniary interest (F2).
• Footnote F4: the 3.998 units are dividend equivalent units credited upon payment of a dividend and will convert into additional RSUs subject to the same vesting/terms as the original RSUs.
• No late filing notation; no sale or cash exercise occurred.

Context

• DEUs are bookkeeping credits that convert into RSUs tied to previously granted awards; they reflect dividend accruals on RSUs rather than new cash transactions.
• Because the Reporting Person is a trustee/10% owner with holdings across family trusts and partnerships, these filings reflect institutional/beneficial interests and routine award administration rather than direct executive open-market trading.