Form 4 Filing for Kevin K. Engel

Kevin K. Engel, President and CEO of AMKOR TECHNOLOGY, INC., reported transactions on June 30, 2026. He acquired 8,692 shares of Common Stock through the vesting of Restricted Stock Units (RSUs), with the shares withheld to cover tax obligations. The value of these shares was $0.00. Subsequently, Mr. Engel disposed of 3,725 shares of Common Stock at a price of $86.23 per share, resulting in a post-transaction ownership of 12,887 shares. The RSUs were granted on February 20, 2025, and vested in installments, with full vesting occurring on June 30, 2026.