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

1. Securities name: Nanya Technology common shares. 2. Transaction date: 2026/4/1~2026/4/9. 3. Date of board resolution: Not applicable. 4. Other approval dates: Approval level: Chairman's approval. April 9, 2026. 5. Transaction quantity, price per unit, and total transaction amount: Transaction quantity (thousand shares): 2,540. Price per unit (NT$): 208.31. Total transaction amount (NT$): 529,102,688. 6. Disposal profit (or loss) (not applicable to acquisition of securities): Not applicable. 7. Relationship with the target company: None. 8. As of now, the cumulative holding of these securities (including this transaction) in terms of quantity, amount, shareholding ratio, and restrictions on rights (e.g., pledge status): Remaining holding: 7,211,000 shares, Amount: NT$1,665,237,724. Shareholding ratio: 0.23%, Restrictions on rights: None. 9. As of now, the proportion of investment in securities (including this transaction) as listed in Article 3 of the "Regulations Governing the Acquisition or Disposal of Assets by Public Companies" to the company's total assets and equity attributable to owners of the parent in the most recent financial report, and the amount of working capital in the most recent financial report: Proportion of total assets: 76.00%. Proportion of equity attributable to owners of the parent: 106.45%. Working capital amount: NT$8,285,327 thousand. 10. Specific purpose of acquisition or disposal: Investment portfolio. 11. Opinions of directors who expressed dissent to this transaction: None. 12. Is this transaction a related party transaction: No. 13. Counterparty of the transaction and its relationship with the company: Not applicable. 14. Date of approval by supervisors or audit committee: Not applicable. 15. Date of previous material information announcement for the same event: Not applicable. 16. Other matters to be specified: Authorized the authorized trader on 2026/03/31 to conduct securities transactions in the centralized securities exchange market during Q2 2026.