2323 CMC Magnetics Announces Disposal of Marketable Securities

Release Date: July 8, 2026 Statement Date: July 7, 2026 Statement Time: 17:52:45 Company Code: 2323 Company Name: CMC Magnetics Corporation Subject: Announcement of Disposal of Marketable Securities Relevant Clause: Item 20 Factual Date: July 7, 2026

1. Security Name: Sino-American Technology Ordinary Shares

2. Transaction Date: July 2, 2026 – July 7, 2026

3. Board Approval Date: Not applicable

4. Other Approval Date: Approval Level: Chairman Approval July 7, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 574 Unit Price (NT$): 595.15 Total Transaction Amount (NT$): 341,613,258

6. Disposal Gain (or Loss) (not applicable for acquisition): Disposal Loss: NT$30,223,125

7. Relationship with the Target Company: None

8. Cumulative Holdings to Date (including this transaction): Remaining Holdings: 454,892 shares, Value: NT$296,225,859 Ownership Percentage: 0.40%, Restricted Rights (e.g., pledge): None

9. Proportion of Marketable Securities Investment (including this transaction) under Article 3 of the “Asset Acquisition and Disposal Rules for Publicly Issued Companies” to Total Assets and Equity Attributable to Owners of Parent in the Most Recent Financial Statements, and Amount of Working Capital: Percentage of Total Assets: 86.11% Percentage of Equity Attributable to Owners of Parent: 123.67% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Portfolio Management

11. Dissenting Director’s Opinion on This Transaction: None

12. Whether This Transaction is a Related-Party Transaction: No

13. Counterparty and Relationship with the Company: Not applicable

14. Date of Supervisor Approval or Audit Committee Consent: Not applicable

15. Previous Material Information Disclosure Date for the Same Event: Not applicable

16. Other Disclosures: On June 30, 2026, authorized traders were granted permission to conduct securities transactions in the centralized market during the third quarter of 2026.