X0306 4 2022-02-24 0 0001047127 AMKOR TECHNOLOGY, INC. AMKR 0001596796 Rutten Guillaume Marie Jean 2045 EAST INNOVATION CIRCLE TEMPE AZ 85284 1 1 0 0 President and CEO Common Stock 2022-02-24 4 A 0 42992 0.00 A 332992 D Represents shares of Amkor Technology, Inc. (the "Issuer") common stock underlying time-vested restricted stock units granted on February 24, 2022 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). The RSUs were awarded for no consideration other than the Reporting Person's service as an officer of the Issuer and will vest in four equal annual installments beginning on the first anniversary of the Grant Date. Mark N. Rogers, Attorney-in-Fact for Guillaume Marie Jean Rutten 2022-02-25