2323 Chung Hsin Electric & Machinery Co., Ltd.

Release Date: June 27, 2026 Statement Date: June 26, 2026 Statement Time: 18:17:45 Company Code: 2323 Company Name: Chung Hsin Electric & Machinery Co., Ltd. Subject: Announcement of Disposal of Marketable Securities Applicable Clause: Clause 20 Factual Date: June 26, 2026

1. Security Name: Win Semiconductors Corp. Common Stock

2. Transaction Date: June 11, 2026 – June 26, 2026

3. Board Approval Date: Not applicable

4. Other Approval Date: Approval Level: Approved by Chairman June 26, 2026 (R.O.C. Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (in thousands of shares): 615 Unit Price (NT$): 503.08 Total Transaction Amount (NT$): 309,397,259

6. Gain (or Loss) from Disposal (not applicable for acquisition): Disposal Gain: NT$1,724,885

7. Relationship with the Target Company: None

8. Cumulative Holdings of the Security (including this transaction) to Date – Quantity, Value, Ownership Percentage, and Restricted Rights (e.g., Pledge Status): Remaining Holdings: 246,000 shares, Value: NT$116,291,221 Ownership Percentage: 0.06%, Restricted Rights: None

9. Proportion of Marketable Securities Investment (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to the Company's Total Assets and Equity Attributable to Owners of Parent in the Most Recent Financial Statements, and the Amount of Working Capital in the Most Recent 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 Disposal: Portfolio Management

11. Dissenting Director's Opinion on 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 Explanatory Matters: On March 31, 2026, authorized traders were granted permission to conduct securities transactions on the centralized market during the second quarter of 2026.