Amkor Technology Director Douglas Alexander Exercises Options and Sells $275K in AMKR Under Rule 10b5-1 Plan

Insider Transaction Analysis

Overview: On October 2, 2026, Douglas A. Alexander, a Director at Amkor Technology, Inc. ($AMKR), executed a cashless exercise-and-sell transaction. The director exercised options to purchase 5,000 shares of common stock at a strike price of $8.51 per share and subsequently sold all 5,000 shares at a price of $55.00 per share, generating gross proceeds of $275,000.

Transaction Highlights:

• Option Exercise: 5,000 shares acquired at an exercise price of $8.51 per share from a grant dated May 1, 2018 (expiring May 1, 2028).
• Sale: 5,000 shares sold at $55.00 per share.
• Pre-Arranged Trading Plan: The transaction was executed under a pre-established Rule 10b5-1 plan adopted on May 8, 2026.
• Direct Holdings Retained: Alexander retains direct ownership of 29,109 shares of common stock alongside 9,657 remaining derivative options.

Significance: This transaction is categorized as Low significance. It represents a standard option exercise and liquidation executed under a pre-arranged Rule 10b5-1 trading plan rather than discretionary open-market insider selling.