CHT Corporation Announces Disposal of Securities

1. Security Name: Nanya Technology Common Stock

2. Transaction Date: June 29–30, 2026 (Minguo Year 115)

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman June 30, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 1,180 Unit Price (NT$): 452.11 Total Transaction Amount (NT$): 533,492,494

6. Gain (or Loss) on Disposal (not applicable for acquisition of securities): Gain on disposal: NT$2,181,079

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Value, Ownership Percentage, and Restricted Rights (e.g., pledged): Remaining Holdings: 2,004,000 shares, Value: NT$924,424,759 Ownership Percentage: 0.06%, Rights Restrictions: None

9. Proportion of Securities Investments (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Regulations 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: 82.70% Percentage of Equity Attributable to Owners of the Parent: 118.78% Working Capital Amount: 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 March 31, 2026 (Minguo Year 115), authorized traders were granted authority to conduct securities transactions on the centralized market during the second quarter of 2026.