2323 CTC, Announces Acquisition of Securities in Powerwave

Release Date: July 7, 2026 Statement Date: July 6, 2026 Statement Time: 18:14:18 Company Code: 2323 Company Name: CTC Subject: Announcement of the Company's Acquisition of Securities Applicable Clause: Clause 20 Factual Date: July 6, 2026

1. Security Name: Powerwave Common Stock

2. Transaction Date: June 16, 2026 – July 6, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 6, 2026

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Quantity (in thousands of shares): 376 Unit Price (NT$): 850.84 Total Transaction Amount (NT$): 319,915,576

6. Gain (or Loss) on Disposal (Not applicable for acquisition of securities): Not applicable

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Restrictions (e.g., Pledging): Balance Held: 407,000 shares, Amount: NT$359,134,512 Ownership Percentage: 0.51%, 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 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 the Acquisition or Disposal: Portfolio Investment

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, authorized traders were granted permission to conduct securities transactions in the centralized market during Q3 2026.