CHT announced the disposal of securities in Nanya Technology

1. Security Name: Nanya Technology Common Stock

2. Transaction Date: 2026/7/3 ~ 2026/7/6

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 6, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Quantity (in thousands of shares): 1,060 Unit Price (NT$): 424.48 Total Transaction Amount (NT$): 449,953,250

6. Disposal Gain (or Loss) (not applicable for acquisition of securities): Disposal Loss: NT$9,828,066

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., pledged): Remaining Holdings: 3,444,000 shares, Amount: NT$1,519,428,136 Ownership Percentage: 0.10%, Rights Restrictions: None

9. Cumulative Securities Investment (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' as a Percentage of Total Assets and Equity Attributable to Owners of the Parent in the Company's Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 86.03% Percentage of Equity Attributable to Owners of the Parent: 123.56% 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 Explanatory Matters: On June 30, 2026, authorized trading personnel were granted authority to conduct securities transactions on the centralized market during the third quarter of 2026 (Minguo Year 115).