Announcement Date: July 7, 2026 Statement Date: July 6, 2026 Statement Time: 18:15:52 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: Huagang Light Ordinary Shares

2. Transaction Date: July 3, 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 Amount: Transaction Quantity (in thousands of shares): 679 Unit Price (NT$): 463.40 Total Transaction Amount (NT$): 314,646,693

6. Gain (or Loss) from 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 Rights Restrictions (e.g., Pledge Status): Holding Balance: 1,629,000 shares, Amount: NT$853,974,108 Ownership Percentage: 1.14%, 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: 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: Investment Portfolio

11. Directors’ Dissenting 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 the third quarter of 2026.

FACT BOX

  • Source: PR Times
  • Category: News