Amkor Technology Director Douglas Alexander Files Form 144 to Sell $275K in Stock

Summary of Proposed Transaction

Amkor Technology, Inc. director Douglas A. Alexander filed a Form 144 on October 2, 2026, disclosing an intention to sell 5,000 shares of common stock through Morgan Stanley Smith Barney LLC. The aggregate market value of the shares is estimated at $275,000.00, implying an average price of approximately $55.00 per share.

Key Transaction Context

• Nature of Acquisition: The 5,000 shares to be sold stem from a stock option exercise completed on October 2, 2026, paid in cash to the issuer.
• Pre-Arranged Trading Plan: The proposed sale is executed pursuant to a Rule 10b5-1 trading plan adopted on May 8, 2026, indicating the timing and amount were pre-scheduled rather than driven by near-term company developments.
• Prior Activity: Over the preceding three months, Mr. Alexander sold 5,000 shares on August 7, 2026, generating gross proceeds of $279,050.00.
• Market Impact: With approximately 248.45 million shares outstanding, the proposed 5,000-share disposition represents an immaterial portion (<0.01%) of the total shares, carrying minimal market impact and low trading significance.