ALEXANDER DOUGLAS A 4

What Happened Douglas A. Alexander, a director of Amkor Technology, Inc. (AMKR), was granted 2,613 time‑vested restricted stock units (RSUs) on May 13, 2026 (transaction code A). The award is reported at $0.00 (no cash paid) and represents a derivative right to receive 2,613 shares of common stock on a one‑for‑one basis upon vesting. The RSUs were awarded for his service as a director.

Key Details

• Transaction date: 2026-05-13 (filed with the SEC on 2026-05-15 — timely).
• Security: 2,613 RSUs; reported acquisition price $0.00 (award/grant).
• Vesting: RSUs vest in full on the earlier of the first anniversary of the grant date or the issuer’s first annual meeting of stockholders following the grant (per footnote).
• Shares owned after transaction: not specified in the Form 4 filing.
• Transaction type: derivative award (RSUs), not a market purchase or sale.

Context RSUs are a common form of equity compensation for directors and employees; they convert to actual shares only upon vesting and typically reflect compensation for service rather than an active market bet. This filing documents the grant itself and does not indicate an immediate sale or purchase of underlying shares.