CHT Corporation Announces Disposal of Securities

1. Security Name: Nanya Technology Common Stock

2. Transaction Date: 2026/6/12 ~ 2026/6/16

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman June 16, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Quantity (in thousands of shares): 1,080 Unit Price (NT$): 387.60 Total Transaction Amount (NT$): 418,606,296

6. Gain (or Loss) on Disposal (not applicable for acquisition of securities): Gain on disposal: NT$16,667,613

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: 894,000 shares, Amount: NT$324,178,332 Ownership Percentage: 0.03%, Rights Restrictions: None

9. Cumulative Securities Investments (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: 79.91% Percentage of Equity Attributable to Owners of the Parent: 114.77% Working Capital Amount: NT$8,285,327,000

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 in the centralized market during the second quarter of 2026.