Chung Hsing Announces Acquisition of Marketable Securities

1. Security Name: Huagang Light Common Stock

2. Transaction Date: June 1, 2026 – June 22, 2026 (Minguo Year 115)

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman June 22, 2026 (Minguo Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 658 Unit Price (NT$): 568.18 Total Transaction Amount (NT$): 373,863,056

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): Holdings: 758,000 shares, Amount: NT$450,506,300 Ownership Percentage: 0.53%, Rights Restrictions: None

9. Cumulative Marketable Securities Investment under Article 3 of the 'Asset Acquisition and Disposal Rules for 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 Operating Working Capital: Percentage of Total Assets: 82.21% Percentage of Equity Attributable to Owners of Parent: 118.07% Operating Working Capital: NT$8,285,327 thousand

10. Specific Purpose of 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 March 31, 2026 (Minguo Year 115), authorized traders were granted authority to conduct securities transactions in the centralized market during Q2 2026.