Announcement of General Manager Change at Key Subsidiary Nuvoton Technology Holdings Japan

Disclosure Date: June 27, 2026 Statement Date: June 26, 2026 Statement Time: 17:49:32 Company Code: 4919 Company Name: Nuvoton Technology Corporation Subject: Announcement Regarding Change of General Manager (Representative Director and President) at Key Subsidiary Nuvoton Technology Holdings Japan Applicable Clause: Clause 6 Event Date: June 26, 2026

Details: 1. Board Resolution Date or Change Date: June 26, 2026 2. Position (Chairman or General Manager): General Manager (Representative Director and President) 3. Former Name: Yoshitaka Kinoshita 4. Former Resume: General Manager (Representative Director and President) of Nuvoton Technology Holdings Japan 5. New Appointee Name: Not Applicable 6. New Appointee Resume: Not Applicable 7. Nature of Change (select from 'Resignation', 'Dismissal', 'End of Term', 'Job Reassignment', 'Redundancy', 'Retirement', 'Death', or 'New Appointment'): Job Reassignment 8. Reason for Change: Job Reassignment 9. Effective Date of New Appointment: June 26, 2026 10. Other Matters to be Disclosed: None. This significant information also qualifies under Article 7, Paragraph 6 of the Enforcement Rules of the Securities and Exchange Act as a matter having a significant impact on shareholder rights or securities prices, but there are no additional disclosures required.