CHIMEI Announces Disposal of Marketable Securities

1. Security Name: China Star Optoelectronics Ordinary Shares

2. Transaction Date: 2026/05/26 ~ 2026/07/03

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 3, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Transaction Quantity (in thousands of shares): 683 Unit Price (NT$): 529.96 Total Transaction Amount (NT$): 361,959,634

6. Gain (or Loss) on Disposal (not applicable for acquisition of securities): Disposal loss: NT$4,806,452

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Subject Securities (including this transaction) to Date – Quantity, Value, Ownership Percentage, and Restricted Rights (e.g., pledged): Remaining Holdings: 1,145,000 shares, Value: NT$630,545,849 Ownership Percentage: 0.80%, Rights Restrictions: None

9. Cumulative Marketable Securities Investment (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' as a Percentage of Total Assets and Equity Attributable to Owners of the Parent in the Company’s Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 83.19% Percentage of Equity Attributable to Owners of the Parent: 119.49% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Portfolio management

11. Dissenting Director Opinions on This Transaction: None

12. Whether This Transaction is a Related-Party Transaction: No

13. Counterparty and Its Relationship with the Company: Not applicable

14. Date of Supervisor Approval or Audit Committee Consent: Not applicable

15. Previous Date of Material Information Disclosure on the Same Event: Not applicable

16. Other Explanatory Matters: On June 30, 2026, authorized traders were granted permission to conduct securities transactions on the centralized market during the third quarter of 2026 (Minguo Year 115).