CFO Megan Faust's Stock Transactions at Amkor Technology

This Form 4 filing discloses CFO Megan Faust's stock transactions at Amkor Technology, Inc. (AMKR) on June 30, 2026. The transactions involve the final vesting of restricted stock units (RSUs) granted on February 20, 2025. Faust received 8,692 shares of common stock through the vesting of RSUs (transaction code M) at $0 per share. Additionally, 3,725 shares were withheld by the company (transaction code F) at $86.23 per share to satisfy tax withholding obligations related to the RSU vesting. Following these transactions, Faust's total direct ownership decreased to 137,105 shares of common stock. The RSUs were granted under Amkor's 2021 Equity Incentive Plan and vested in five equal quarterly installments, with 100% fully vested on June 30, 2026.