Amkor Technology (AMKR) 10% Owner James J. Kim Exercises Options

What Happened

• James J. Kim, a 10% owner of Amkor Technology (AMKR) serving as trustee for family trusts, exercised stock options on July 20, 2026 to acquire 450,000 shares of AMKR common stock. He paid $9.86 for 200,000 shares ($1,972,000) and $9.48 for 250,000 shares ($2,370,000), for a total cash outlay of $4,342,000. The Form 4 shows the related derivative option positions were disposed (cancelled) as part of the exercise (transaction code M = option exercise).

Key Details

• Transaction date: 2026-07-20 (filed on 2026-07-22; appears timely)
• Acquisitions: 200,000 shares at $9.86 ($1,972,000) and 250,000 shares at $9.48 ($2,370,000)
• Derivative dispositions: corresponding 200,000 and 250,000 option positions reported disposed at $0.00 (typical when options are exercised)
• Shares owned after transaction: filer reports a pecuniary interest in 10,675,710 shares pre-transaction (10,511,032 + 164,678 per footnote); after acquiring 450,000 shares this interest rises to about 11,125,710 shares
• Notable footnotes: (F1) Kim is a trustee for trusts owning the shares and is treated as having a pecuniary interest; (F2) he disclaims beneficial ownership except to the extent of pecuniary interest; (F3/F4) the exercised options were grant awards from 2017 (200k) and 2019 (250k) that had vested
• Filing timeliness: Form filed two days after the transaction date (no late-file notice)

Context

• These transactions are option exercises (M code). The reporting shows cash paid for shares, not a cashless sell-into-market, so Kim retained the acquired shares rather than immediately selling them in a cashless transaction.
• As a 10% owner/trustee rather than an executive in a day-to-day management role, this is institutional/insider ownership activity; exercises can be for tax or ownership reasons and do not necessarily signal a change in view of the company.