Form 4 Filing for AMKOR TECHNOLOGY, INC. by Robert Randolph Morse

This Form 4 filing details transactions by Robert Randolph Morse, a director at AMKOR TECHNOLOGY, INC. (AMKR). On April 7, 2026, Morse exercised a vested stock option to acquire 20,000 shares of Common Stock at an exercise price of $5.66 per share. This transaction is noted as a net exercise with the Issuer, as per footnote F1, meaning no shares were bought or sold on the open market. Consequently, the number of shares owned following this transaction is reported as 137,355. Additionally, 2,378 shares were disposed of, resulting in a post-transaction ownership of 134,977 shares. The stock option itself, granted on May 4, 2016, vested in full on May 2, 2017.