X0306 4/A 2023-02-24 2023-02-24 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 2023-02-24 4 M 0 10748 0.00 A 150748 D Common Stock 2023-02-24 4 F 0 940 25.27 D 149808 D This amendment is being filed to correct the number of shares beneficially owned by the Reporting Person as reported in the original Form 4 filed with the Securities and Exchange Commission on February 24, 2023 (the "Original Form 4"). The Original Form 4 inadvertently overstated the Reporting Person's beneficial ownership in Column 5 of Table I by 30,000 shares. Mark N. Rogers, Attorney-in-Fact for Guillaume Marie Jean Rutten 2023-03-17