[CMC Magnetics] Announcement regarding the disposal of securities

1. Security Name: ADATA Common Stock 2. Transaction Date: 115/5/22~115/6/2 3. Board Approval Date: N/A 4. Other Approval Date: Chairman Approval (June 2, 115) 5. Quantity, Unit Price, and Total Amount: 790,000 shares, 440.69 TWD per share, 348,143,490 TWD 6. Disposal Gain: 10,741,167 TWD 7. Relationship with the target company: None 8. Cumulative holdings (including this transaction): 823,000 shares, 351,384,965 TWD, 0.25% stake, no rights restrictions 9. Asset investment ratios: 79.21% of total assets, 113.76% of parent equity, operating capital 8,285,327,000 TWD 10. Specific Purpose: Investment portfolio adjustment 11. Dissenting opinions: None 12. Related party transaction: No 13. Counterparty: N/A 14. Audit Committee approval date: N/A 15. Previous material information disclosure date: N/A 16. Other notes: Authorized to conduct securities trading in the centralized market during the second quarter of 115 on March 31.