CHT announced the disposal of marketable securities

1. Security Name: Nanya Technology Common Stock

2. Transaction Date: 2026/7/1 ~ 2026/7/2

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 2, 2026 (ROC Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Transaction Quantity (in thousands of shares): 880 Unit Price (NT$): 414.98 Total Transaction Amount (NT$): 365,184,314

6. Disposal Gain (or Loss) (not applicable for acquisition of securities): Disposal Gain: NT$1,269,636

7. Relationship with the Target Company: None

8. Cumulative Holdings (including this transaction) to Date: Remaining Holdings: 3,444,000 shares, Amount: NT$1,536,674,526 Ownership Ratio: 0.10%, Rights Restrictions (e.g., pledge): None

9. Proportion of Marketable Securities Investment (including this transaction) under Article 3 of the "Asset Acquisition and Disposal Regulations for Publicly Issued Companies" relative to Total Assets and Equity Attributable to Owners of Parent in the Most Recent Financial Statements, and Operating Working Capital: Percentage of Total Assets: 83.25% Percentage of Equity Attributable to Owners of Parent: 119.57% Operating Working Capital: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Investment 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 traders were granted authority to conduct securities transactions on the centralized market during the third quarter of 2026 (ROC Year 115).