【Feng Hsin】Announcement: Company Disposes of Over NT$300 Million in the Same Securities Within One Year

1. Security Name: Phison 2. Transaction Date: 2025/10/28~2026/05/05 3. Date of Board Resolution: Not applicable 4. Other Approval Date: Approval by Chairman, May 5, 2026 5. Quantity, Unit Price, and Total Transaction Amount: Quantity: 261,000 shares; Unit Price: NT$1,242.13; Total Transaction Amount: NT$324,195,000 6. Disposal Gain (or Loss) (Not applicable for acquisition of securities): Cumulative Disposal Gain: NT$64,510,420 7. Relationship with the Counterparty: None 8. As of now, cumulative holdings of these securities (including this transaction) in terms of quantity, amount, shareholding ratio, and rights restrictions (e.g., pledges): Quantity: 61,000 shares; Transaction Amount: NT$111,148,420; Shareholding Ratio: 0.03%; Rights Restrictions: None 9. As of now, the ratio of investments in securities (including this transaction) listed in Article 3 of the "Regulations Governing the Acquisition or Disposal of Assets by Public Companies" to the company's latest financial report's total assets and owner's equity attributable to the parent company, and the amount of working capital in the latest financial report: Ratio to Total Assets: 12.06%; Ratio to Shareholders' Equity: 14.94%; Working Capital Amount: NT$7,783,939,000 10. Specific Purpose of Acquisition or Disposal: To align with the company's fund utilization plan 11. Opinions of dissenting directors on this transaction: None 12. Is this transaction a related party transaction: No 13. Counterparty and its relationship with the company: Not applicable 14. Date of approval by supervisors or audit committee: Not applicable 15. Date of previous material information announcement for the same event: Not applicable 16. Other matters to be specified: None