2323 Chung Hsin Electric

Announcement Date: July 18, 2026 Statement Date: July 17, 2026 Statement Time: 18:01:12 Company Code: 2323 Company Name: Chung Hsin Electric Subject: Announcement of Acquisition of Securities Applicable Clause: Clause 20 Factual Date: July 17, 2026

1. Security Name: TSMC Common Stock

2. Transaction Date: July 9, 2026 – July 17, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by Chairman July 17, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity (in thousands of shares): 195 Unit Price (NT$): 2,395.13 Total Transaction Amount (NT$): 467,051,005

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 Subject Securities (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Rights Restrictions (e.g., Pledge Status): Holdings Balance: 190,000 shares, Amount: NT$448,331,643 Ownership Percentage: 0.0007%, Rights Restrictions: None

9. Proportion of Securities Investments (including this transaction) Listed under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' to the Total Assets and Equity Attributable to Owners of the Parent in the Company's Latest Financial Statements, and the Amount of Working Capital in the Latest Financial Statements: Percentage of Total Assets: 86.22% Percentage of Equity Attributable to Owners of the Parent: 123.83% Working Capital Amount: NT$8,285,327 thousand

10. Specific Purpose of Acquisition or Disposal: Investment Portfolio

11. Directors Who Expressed Objections to 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 Explanatory Matters: On June 30, 2026, authorized traders were approved to conduct securities transactions in the centralized market during the third quarter of 2026.