Engel Kevin K. 4

What Happened Kevin K. Engel, President, Chief Executive Officer and a director of Amkor Technology, had 8,692 restricted stock units (RSUs) convert to common shares on March 31, 2026. Of those shares, 3,725 were withheld by the company to satisfy tax withholding obligations at a reported withholding price of $45.03 per share, equal to $167,737. The conversion is reported as an exercise/conversion of a derivative (code M) and the withholding is reported as a tax withholding disposition (code F).

Key Details

• Transaction date: 2026-03-31 (reported on Form 4 filed 2026-04-02).
• Converted/exercised: 8,692 RSUs → 8,692 shares (exercise/conversion, code M) at $0.00 consideration.
• Withheld for taxes: 3,725 shares disposed (code F) at $45.03 each, total value $167,737.
• Grant details (footnote): These RSUs were part of a 43,459-RSU grant made Feb 20, 2025 that vests in five equal quarterly installments (100% vested on June 30, 2026); the March 31, 2026 installment was 8,692 RSUs.
• The issuer withheld shares to cover tax withholding and will pay those taxes on behalf of the reporting person (per filing).
• Shares owned after the transaction: not specified in the provided filing.

Context

• This was a routine RSU vesting and tax-withholding event (conversion of RSUs, then share withholding to satisfy taxes), not an open-market purchase or sale indicating new market bets.
• The sequence (exercise/conversion followed by withholding) is a common cashless outcome of RSU vesting: the company retains some shares to cover taxes and delivers the remainder to the insider.
• Filing timing: reported within days (grant period ended Mar 31; Form 4 filed Apr 2, 2026); no late-filing flag noted in the provided data.