Rutten Guillaume Marie Jean 4

What Happened Rutten Guillaume Marie Jean, a director of Amkor Technology, received a total of 41,478 shares of common stock through the vesting of performance-vested restricted stock units (PSUs). The filing shows 10,891 shares vested from PSUs granted Feb 20, 2024 and 30,587 shares vested from PSUs granted Feb 20, 2025. Both awards are reported at $0.00 per share (no cash purchase).

Key Details

• Transaction date: February 18, 2026 (reported on Form 4 filed Feb 20, 2026 — timely filing).
• Transaction type: Award/Grant (code A) via PSU vesting; reported price $0.00 for each lot.
• Shares received: 10,891 (from 2024 grant) + 30,587 (from 2025 grant) = 41,478 total.
• Reason for vesting: PSUs vested based on attainment of a basic earnings-per-share (EPS) performance goal for the one-year period Jan 1–Dec 31, 2025 (per footnotes F1 and F2).
• Post-transaction holdings: Not specified in the provided excerpt of the filing.
• Tax withholding / disposition: No tax-withholding or sale information is included in this Form 4.

Context PSUs are compensation that convert to shares when performance targets are met; these are not open-market purchases or sales and therefore aren’t a direct market signal like insider buys or sells. The vesting reflects achievement of a company EPS goal for 2025 and is routine compensation-related reporting for directors and executives.