[CMC] Public Announcement: Company Acquires Marketable Securities

1. Name of the securities: Phison Electronics (Ordinary Shares) 2. Date of transaction: April 17, 2026, to April 24, 2026 3. Date of board approval: Not applicable 4. Date of other finalization: Authorized by the Chairman on April 24, 2026 5. Transaction volume, unit price, and total amount: Volume: 245,000 shares; Unit price: 1,686.79 TWD; Total amount: 413,264,390 TWD 6. Gain/loss on disposal: Not applicable (acquisition of securities) 7. Relationship with the counterparty company: None 8. Cumulative holding of the security (including this transaction): Total balance: 565,000 shares; Amount: 979,906,872 TWD; Shareholding ratio: 0.26%; Restrictions on rights: None 9. Ratio of securities investment to total assets and equity of the parent company's owner: Ratio to total assets: 77.62%; Ratio to equity: 108.72%; Working capital: 8,285,327,000 TWD 10. Specific purpose of the acquisition: Investment portfolio 11. Opinions of dissenting directors: None 12. Related party transaction: No 13. Counterparty and relationship with the company: Not applicable 14. Date of audit committee or supervisor approval: Not applicable 15. Previous announcements on the same event: Not applicable 16. Other notes: Authorized person was granted on March 31, 2026, to trade securities in the open market during the second quarter of 2026. Keywords: Material Information