[CMC Magnetics] Announcement of the company's disposal of securities

1. Name of securities: Nanya Technology Common Stock
2. Trading date: 2026/5/14~2026/5/15
3. Date of board of directors resolution: Not applicable
4. Date of other approval: Approval level: Chairman's approval, May 15, 2026
5. Transaction volume, price per unit, and total transaction amount: Transaction volume (thousand shares): 1,220; Price per unit (NT$): 339.20; Total transaction amount (NT$): 413,821,761
6. Disposal profit (or loss) (Not applicable for acquiring securities): Disposal profit of NT$31,495,520
7. Relationship with the underlying company of the trade: None
8. Up to the present, cumulative quantity, amount, shareholding percentage, and status of restricted rights (such as pledges) of the traded securities held (including this transaction): Remaining balance: 3,393,000 shares; Amount: NT$860,413,507; Shareholding percentage: 0.098%; Restricted rights: None
9. Up to the present, the ratio of securities investment (including this transaction) to total assets and equity attributable to owners of the parent in the most recent financial statements, and the amount of working capital: Ratio to total assets: 78.53%; Ratio to equity attributable to owners of the parent: 112.78%; Working capital amount: NT$8,285,327 thousand
10. Specific purpose of acquisition or disposal: Investment portfolio
11. Dissenting opinions of directors to the present transaction: None
12. Is the present transaction a related party transaction: No
13. Transaction counterparty and its relationship with the company: Not applicable
14. Date of approval by supervisors or the audit committee: Not applicable
15. Date of previous major message regarding the same event: Not applicable
16. Other matters to be specified: Authorized traders have been empowered on 2026/03/31 to conduct securities trading in the centralized market during the second quarter of 2026.