2323 Chung Hsin Acquires Marketable Securities of Kuang Sheng

Release Date: June 27, 2026 Statement Date: June 26, 2026 Statement Time: 18:15:10 Company Code: 2323 Company Name: Chung Hsin Subject: Announcement of Acquisition of Marketable Securities Applicable Clause: Clause 20 Date of Event: June 26, 2026

1. Security Name: Kuang Sheng Common Stock

2. Transaction Date: May 29, 2026 – June 26, 2026

3. Board Approval Date: Not applicable

4. Other Approval Date: Approval Level: Approved by Chairman June 26, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 160 Unit Price (NT$): 1,878.37 Total Transaction Amount (NT$): 300,538,871

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 Restricted Rights (e.g., pledge status): Balance Held: 80,000 shares, Amount: NT$151,868,528 Ownership Percentage: 0.10%, Restricted Rights: None

9. Cumulative Investment in Marketable Securities under Article 3 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies' (including this transaction), as a Percentage of Total Assets and Equity Attributable to Owners of Parent in the Company’s Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 85.18% Percentage of Equity Attributable to Owners of Parent: 122.34% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposition: Investment portfolio management

11. Dissenting Director’s Opinion 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’s Acknowledgment or Audit Committee’s Approval: Not applicable

15. Previous Date of Material Information Disclosure on the Same Event: Not applicable

16. Other Disclosures: On March 31, 2026, authorized traders were granted authority to conduct securities transactions in the centralized market during the second quarter of 2026.