Amkor Technology, Inc.: director Alexander Douglas A sold 5,000 shares

What happened

• Alexander Douglas A, a director, exercised options to acquire 5,000 shares at $8.51 per share on Oct 2, 2026, paying $42,550, and sold 5,000 shares in an open market sale at $55.00 per share the same day for $275,000. The filing also reports the exercise or conversion of a derivative for 5,000 shares with $0.00 listed as the disposed value.

Key details

• Transactions: Oct 2, 2026 — exercised options: 5,000 shares at $8.51 ($42,550); Oct 2, 2026 — sale: 5,000 shares at $55.00 ($275,000); Oct 2, 2026 — exercise/conversion disposition: 5,000 shares at $0.00 ($0).
• Shares owned after the transaction: not stated in the filing.
• Footnotes: the sale was effected pursuant to a Rule 10b5-1 trading plan adopted May 8, 2026 (F1). The options: granted May 1, 2018 for 20,000 shares, vested in full on May 1, 2019 (F2).
• Form filed Oct 6, 2026 (accession 0001628280-26-065246); the Form 4 does not indicate a late filing.

Why it may matter

• The filing shows options were exercised and the exercised shares were sold the same day (cashless exercise).
• A filing does not show why the insider traded or why the company acted.