X0306 4 2022-05-17 0 0001047127 AMKOR TECHNOLOGY, INC. AMKR 0001730724 McCourt MaryFrances 2045 EAST INNOVATION CIRCLE TEMPE AZ 85284 1 0 0 0 Common Stock 2022-05-17 4 A 0 8706 0.00 A 49798 D Represents shares of Amkor Technology, Inc. (the "Issuer") common stock underlying time-vested restricted stock units granted on May 17, 2022 (the "Grant Date") pursuant to the Issuer's Equity Incentive Plan (the "RSUs"). Subject to the terms and conditions of the applicable award agreement, the RSUs will vest in full on the earlier of the first anniversary of the Grant Date or the date of the Issuer's first annual meeting of the stockholders immediately following the Grant Date. The RSUs were awarded for no consideration other than the Reporting Person's service as a director of the Issuer. Mark N. Rogers, Attorney-in-Fact for MaryFrances McCourt 2022-05-19