Central Announces Disposal of Securities

1. Securities name: Phison Common Stock 2. Transaction date: 115/4/13~115/4/20 3. Board approval date: Not applicable 4. Other approval dates: Approval level: Chairman's approval April 20, 115 (2026) 5. Transaction volume, price per unit, and total transaction amount: Transaction volume (thousands of shares): 270 Price per unit (NTD): 1,673.23 Total transaction amount (NTD): 451,772,663 6. Disposal profit (or loss) (not applicable for those acquiring securities): Disposal loss of 3,157,901 yuan 7. Relationship with the company of the transacted security: None 8. Accumulated holdings of this transaction's securities (including current transaction) quantity, amount, shareholding ratio, and conditions of rights restriction (e.g., pledge): Remaining balance: 659,000 shares, Amount: 1,141,711,375 yuan Shareholding ratio: 0.30%, Conditions of rights restriction: None 9. As of now, the proportion of securities investment (including current transaction) listed in Article 3 of the "Regulations Governing Asset Acquisition or Disposal of Public Companies" to the total assets and equity attributable to owners of the parent in the most recent financial statements, and the amount of working capital in the most recent financial statements: Proportion of total assets: 76.09% Proportion of equity attributable to owners of the parent: 106.58% Working capital amount: 8,285,327 thousand yuan 10. Specific purpose of acquisition or disposal: Investment portfolio 11. Opinions of dissenting directors on this transaction: None 12. Is this transaction a related party transaction? No 13. Transaction counterparty and its relationship with the company: Not applicable 14. Date of approval by supervisor or audit committee: Not applicable 15. Date of previous announcement on the same matter: Not applicable 16. Other matters to be noted: Authorized authorized trader on March 31, 115, to conduct securities transactions in the centralized trading market during the second quarter of 115.