X0609 4 2026-09-22 0 0001047127 AMKOR TECHNOLOGY, INC. AMKR 0001351909 Carolin Roger Anthony false 7 GREAT VALLEY PARKWAY, SUITE 190 MALVERN PA 19355 1 0 0 0 0 Restricted Stock Units 2026-09-22 4 A 0 12.9709 0 A Common Stock 12.9709 8916.9241 D Restricted Stock Units 2026-09-22 4 A 0 14.9767 0 A Common Stock 14.9767 9917.4618 D Restricted Stock Units 2026-09-22 4 A 0 3.9978 0 A Common Stock 3.9978 2619.5144 D Represents dividend equivalent units ("DEUs") accrued upon the payment of a dividend on September 22 2026 with respect to time-vested restricted stock units ("RSUs") of Amkor Technology, Inc. (the "Issuer") granted to the Reporting Person on May 16, 2023. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued. Represents DEUs accrued upon the payment of a dividend on September 22, 2026 with respect to RSUs of the Issuer granted to the Reporting Person on May 15, 2025. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued. Represents DEUs accrued upon the payment of a dividend on September 22, 2026 with respect to RSUs of the Issuer granted to the Reporting Person on May 13, 2026. Each DEU represents an additional RSU subject to the same provisions as the RSU with respect to which the DEU was accrued. /s/ Mark N. Rogers, Attorney-in-Fact for Roger A. Carolin 2026-09-24