CHT announced the disposal of securities in Nanya Technology

1. Name of Security: Nanya Technology Ordinary Shares

2. Transaction Date: 2026/8/7 ~ 2026/8/10

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman Date: August 10, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Quantity (in thousands of shares): 860 Unit Price (NT$): 484.03 Total Transaction Amount (NT$): 416,265,523

6. Disposal Gain (or Loss) (not applicable for acquisition of securities): Disposal Gain: NT$58,182,300

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., Pledging): Remaining Holdings: 3,589,000 shares, Amount: NT$1,472,575,382 Ownership Percentage: 0.10%, Rights Restrictions: None

9. Proportion of Securities Investments (including this transaction) 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 Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 85.21% Percentage of Equity Attributable to Owners of the Parent: 122.38% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Portfolio Management

11. Dissenting Director 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 Approval or Audit Committee Consent: Not applicable

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

16. Other Disclosures: On June 30, 2026 (Minguo Year 115), authorized traders were granted permission to conduct securities transactions in the centralized market during Q3 2026.