Nuvoton Technology Holdings Japan Announces Reappointment of Chairman

1. Date of Board Resolution or Change: June 26, 2026 2. Position (Chairman of the Board of Directors): Chairman 3. Name of Former Incumbent: Jason Jong 4. Former Incumbent's Resume: Chairman and CEO of Winbond Electronics Corporation 5. Name of New Appointee: Jason Jong 6. New Appointee's Resume: Chairman and CEO of Winbond Electronics Corporation 7. Nature of Change (e.g., Resignation, Removal, Term Expiration, etc.): Term Expiration 8. Reason for Change: Term Expiration 9. Effective Date of New Appointment: June 26, 2026 10. Additional Disclosures: This matter qualifies as material information under Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act, but no additional disclosures are required as it does not significantly impact shareholder rights or securities prices.