Chung Hsin Announces Disposal of Securities

1. Security Name: Phison Electronics Ordinary Shares

2. Transaction Date: 2026/6/22 ~ 2026/6/24

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman Date: June 24, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity (in thousands of shares): 171 Unit Price (NT$): 2,493.99 Total Transaction Amount (NT$): 426,471,856

6. Gain (or Loss) from Disposal (not applicable for acquisition of securities): Disposal Gain: NT$12,063,703

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Value, Ownership Percentage, and Restricted Rights (e.g., Pledge Status): Remaining Holdings: 288,000 shares, Value: NT$713,314,072 Ownership Percentage: 0.13%, Restricted Rights: None

9. Proportion of Securities Investment (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to the Company's Total Assets and Equity Attributable to Owners of the Parent in the Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 82.16% Percentage of Equity Attributable to Owners of the Parent: 117.99% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Investment 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 March 31, 2026 (Minguo Year 115), authorized traders were granted permission to conduct securities transactions in the centralized market during the second quarter of 2026.