2323 CMC Announces Disposal of Nanya Technology Shares

Release Date: July 17, 2026 Statement Date: July 16, 2026 Statement Time: 17:54:07 Company Code: 2323 Company Name: CMC Subject: Announcement of Disposal of Securities Applicable Clause: Clause 20 Factual Date: July 16, 2026 Details: 1. Security Name: Nanya Technology Ordinary Shares 2. Transaction Date: July 15–16, 2026 3. Board Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Approved by Chairman July 16, 2026 5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 820 Unit Price (NT$): 471.57 Total Transaction Amount (NT$): 386,685,563 6. Gain (or Loss) from Disposal (not applicable for acquisition): Gain from disposal: NT$17,544,379 7. Relationship with the Target Company: None 8. Cumulative Holdings (including this transaction) to Date: Number of Shares, Amount, Ownership Percentage, and Restricted Rights (e.g., Pledge Status): Remaining Holdings: 3,196,000 shares, Amount: NT$1,405,059,802 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 Standards for Publicly Issued Companies' to 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: 85.98% Percentage of Equity Attributable to Owners of the Parent: 123.48% Working Capital Amount: NT$8,285,327 thousand 10. Specific Purpose of Acquisition or Disposal: Investment Portfolio 11. Dissenting Directors’ Opinions on 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’s Approval or Audit Committee’s Consent: Not applicable 15. Previous Date of Material Information Disclosure on 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