2323 CMC Announces Disposal of Securities

Release Date: July 10, 2026 Statement Date: July 9, 2026 Statement Time: 18:01:36 Company Code: 2323 Company Name: CMC Subject: Announcement of Disposal of Securities Applicable Clause: Clause 20 Factual Date: July 9, 2026 Details: 1. Security Name: Nanya Technology Ordinary Shares 2. Transaction Date: 7/9/115 ~ 7/9/115 3. Board Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Approved by Chairman July 9, 115 5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity (in thousands of shares): 980 Unit Price (NT$): 424.55 Total Transaction Amount (NT$): 416,061,176 6. Disposal Gain (or Loss) (Not applicable for acquisition of securities): Disposal Loss: NT$5,572,014 7. Relationship with the Target Company: None 8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Restricted Rights (e.g., Pledge Status): Remaining Holdings: 3,116,000 shares, Amount: NT$1,344,819,101 Ownership Percentage: 0.09%, Restricted Rights: None 9. Proportion of Securities Investments (including this transaction) Listed under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to the Company’s Total Assets and Equity Attributable to Owners of the Parent in the Most Recent Financial Statements, and the Amount of Working Capital in the Most Recent Financial Statements: Percentage of Total Assets: 86.37% Percentage of Equity Attributable to Owners of the Parent: 124.04% Working Capital Amount: NT$8,285,327 thousand 10. Specific Purpose of Acquisition or Disposal: Portfolio Management 11. Directors Who Objected to This Transaction: None 12. Whether This Transaction is a Related-Party Transaction: No 13. Counterparty and Its Relationship with the Company: Not applicable 14. Date of Supervisor Approval or Audit Committee Consent: Not applicable 15. Previous Date of Material Information Disclosure on the Same Event: Not applicable 16. Other Disclosures: Authorized designated traders on June 30, 115 to conduct securities transactions in the centralized market during the third quarter of 115