[Chroma] Announcement of the Board's Election of the Chairman

1. Date of the board resolution or change: 2026/05/29 2. Position: Chairman 3. Name of the predecessor: Huang Chin-ming 4. Resume of the predecessor: Chairman, Chroma ATE Inc. 5. Name of the successor: Huang Chin-ming 6. Resume of the successor: Chairman, Chroma ATE Inc. 7. Reason for change: Expiration of term 8. Reason for the change: Re-elected by the Board of Directors following the 2026 Annual General Meeting of Shareholders. 9. Effective date: 2026/05/29 10. Other matters: None.