Yung-Yi-KY Announces Acquisition of TSMC Shares via Subsidiary's Taiwan Branch

1. Security Name: TSMC Common Stock

2. Transaction Date: June 25, 2026 (R.O.C. Year 115)

3. Board Approval Date: June 25, 2026 (R.O.C. Year 115)

4. Other Approval Dates: Approval Level: Chairman Approval Date: June 25, 2026 (R.O.C. Year 115)

5. Transaction Quantity, Unit Price, and Total Amount: Quantity (Shares): 40,000 Unit Price (NT$): 2,393.41 Total Transaction Amount (NT$): 95,736,230

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 Securities (including this transaction) to Date – Quantity, Amount, Ownership Percentage, and Restricted Rights (e.g., pledged): Balance Held: 40,000 shares, Amount: NT$95,736,230 Ownership Percentage: 0.00015% Rights Restrictions: 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 Company’s Latest Financial Statements, and the Amount of Working Capital: Percentage of Total Assets: 11.86% Percentage of Equity Attributable to Owners of the Parent: 17.38% Working Capital Amount: 573,347 (thousand NT$)

10. Specific Purpose of Acquisition or Disposal: To enhance capital utilization efficiency.

11. Dissenting Directors’ 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’s Acknowledgment or Audit Committee’s Approval: June 25, 2026 (R.O.C. Year 115)

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

16. Other Explanatory Matters: None.