Chung Hsing Announces Disposal of Securities

1. Security Name: Phison Common Stock

2. Transaction Date: 2026/6/10 ~ 2026/6/18

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman June 18, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 154 Unit Price (NTD): 2,367.65 Total Transaction Amount (NTD): 364,618,146

6. Gain (or Loss) on Disposal (not applicable for acquisition of securities): Disposal loss of NT$15,507,673

7. Relationship with the Target Company: None

8. Cumulative Holdings (including this transaction) to date: Remaining Holdings: 339,000 shares, Amount: NT$838,233,731 Ownership Percentage: 0.15%, Rights Restrictions (e.g., pledge): None

9. Proportion of securities investments (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' relative to total assets and equity attributable to owners of the parent in the latest financial statements, and the amount of working capital: Percentage of Total Assets: 81.70% Percentage of Equity Attributable to Owners of the Parent: 117.34% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Portfolio optimization

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 Material Information Disclosure Date for 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.