2323 Chung Hsin Electronics Announces Disposal of Marketable Securities

Release Date: July 4, 2026 Statement Date: July 3, 2026 Statement Time: 17:45:27 Company Code: 2323 Company Name: Chung Hsin Electronics Co., Ltd. Subject: Announcement of Disposal of Marketable Securities Relevant Clause: Clause 20 Factual Date: July 3, 2026

1. Security Name: Phison Electronics Ordinary Shares

2. Transaction Date: June 25, 2026 – July 3, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 3, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 139 Unit Price (NT$): 2,341.60 Total Transaction Amount (NT$): 325,482,774

6. Gain (or Loss) on Disposal (not applicable for acquisition): Disposal loss of NT$15,413,807

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Rights Restrictions (e.g., Pledge): Remaining Holdings: 179,000 shares, Amount: NT$443,962,864 Ownership Percentage: 0.08%, 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: 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 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 Q3 2026.