Form 4 Filing for AMKOR TECHNOLOGY, INC.

Mark N. Rogers, EVP & General Counsel of AMKOR TECHNOLOGY, INC. (AMKR), reported a series of transactions on June 16, 2026. Rogers acquired 5,000 shares of common stock under a Rule 10b5-1 trading plan at $7.40 per share, increasing his holdings to 43,904 shares. Concurrently, he disposed of 5,000 shares of common stock at $86.21 per share, reducing his holdings to 38,904 shares. Additionally, Rogers exercised an employee stock option for 5,000 shares, acquired on June 10, 2019, with an exercise price of $7.40 per share. This option, which vested over four years, was exercised on June 16, 2026. Following this exercise, his post-transaction shares related to this option are 80,000. The option is set to expire on June 10, 2029. All transactions were marked as direct ownership.