[CMC Magnetics] Announcement on Acquisition of Securities

1. Name of securities: King Yuan Electronics Co., Ltd. Common shares 2. Date of transaction: May 29, 2026 to June 5, 2026 3. Date of board of directors resolution: N/A 4. Date of other decision-making: Level of decision-making: Chairman's approval June 5, 2026 5. Volume, unit price, and total monetary amount of the transaction: Volume (thousand shares): 980 Unit price (NTD): 311.84 Total transaction amount (NTD): 305,601,775 6. Gain (or loss) from disposal (not applicable for acquisition of securities): N/A 7. Relationship with the target company of the transaction: None 8. Current cumulative volume, amount, and shareholding percentage of the securities being traded (including the current transaction), and status of any restriction of rights (e.g., pledges): Current balance: 140,000 shares, Amount: 43,810,924 NTD Shareholding percentage: 0.011%, Restriction of rights: None 9. Ratio of cumulative investments in securities under Article 3 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies" (including the current transaction) to total assets and equity attributable to owners of the parent company in the most recent financial statement, and operating capital in the most recent financial statement: Ratio to total assets: 79.64% Ratio to equity attributable to owners of the parent company: 114.38% Operating capital amount: 8,285,327 thousand NTD 10. Specific purpose of the acquisition or disposal: Investment portfolio 11. Dissenting opinions of directors on the transaction: None 12. Is this a related-party transaction: No 13. Trading counterparty and its relationship with the company: N/A 14. Date of approval by supervisors or consent by the audit committee: N/A 15. Date of previous major message release for the same incident: N/A 16. Other explanatory items: Authorized traders were empowered on March 31, 2026, to conduct securities trading on the centralized exchange market during the second quarter of 2026.