2323 Chung Hsin Electric & Engineering Corp.

Release Date: June 23, 2026 Statement Date: June 22, 2026 Statement Time: 17:48:39 Company Code: 2323 Company Name: Chung Hsin Electric & Engineering Corp. Subject: Announcement of Acquisition of Securities Applicable Clause: Item 20 Factual Date: June 22, 2026

Details: 1. Security Name: Huagang Light Common Stock

2. Transaction Date: June 1, 2026 – June 22, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman June 22, 2026

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 (including this transaction) of the subject securities to date, including quantity, amount, ownership percentage, and restricted rights (e.g., pledge status): Holdings: 758,000 shares, Amount: NT$450,506,300 Ownership Percentage: 0.53%, Restricted Rights: None

9. Proportion of securities investments (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to 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: 82.21% Percentage of Equity Attributable to Owners of the Parent: 118.07% Working Capital Amount: NT$8,285,327,000

10. Specific Purpose of Acquisition or Disposal: Portfolio Investment

11. Directors' Objections to This Transaction: None

12. Whether This Transaction is a Related-Party Transaction: No

13. Counterparty and 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, authorized traders were approved to conduct securities transactions in the centralized market during the second quarter of 2026