[CMC Magnetics] Announcement Regarding the Disposal of Securities

1. Name of Security: Nanya Technology Common Shares 2. Transaction Date: 115/5/21–115/5/22 3. Board Approval Date: Not applicable 4. Other Approval Date: Chairman approval (May 22, 115) 5. Quantity, Price per Unit, and Total Amount: Quantity 1,660,000 shares, Price 301.56 TWD, Total 500,581,556 TWD 6. Disposal Gain: 51,479,372 TWD 7. Relationship with the Target Company: None 8. Current Cumulative Holding: Balance 2,739,000 shares, Amount 711,732,583 TWD, Holding Ratio 0.08%, No restrictions 9. Investment Ratio based on Recent Financial Statements: Ratio of total assets 74.28%, Ratio of parent company equity 106.69%, Working capital 8,285,327,000 TWD 10. Purpose: Investment portfolio 11. Dissenting opinions: None 12. Related Party Transaction: No 13. Relationship with the counterparty: Not applicable 14. Audit Committee Approval Date: Not applicable 15. Date of previous major message announcement: Not applicable 16. Other notes: Authorized the authorized trader to perform securities trading in the centralized market during the second quarter of 115 on 115/03/31.