Form 4 Filing for Agnes C. Kim - Stock Transactions

This filing details stock transactions by Agnes C. Kim, a member of a 10% owner group for AMKOR TECHNOLOGY, INC. (AMKR). On December 19, 2025, Ms. Kim distributed 2,538,000 shares of common stock to the 2025 Grantor Retained Annuity Trust No. 1 of Agnes C. Kim. Additionally, on the same date, her spouse, James J. Kim, distributed 3,244,594 shares of common stock to the 2025 Grantor Retained Annuity Trust No. 1 of James J. Kim. The filing clarifies a previous inadvertent reporting error from November 24, 2025, regarding the distribution of 705,000 shares from the 2024 Grantor Retained Annuity Trust to the Agnes C. Kim Revocable Trust. These shares were direct holdings of Ms. Kim. The transactions reported on December 19, 2025, were distributions with a transaction price of $0.00 per share, resulting in 0 shares owned directly by Ms. Kim and 10,012,355 shares owned indirectly following the transactions.