Kichijo Zen Announces Acquisition of Securities

1. Security Name: Winbond Electronics Common Stock

2. Transaction Date: 2026/7/22 ~ 2026/7/22

3. Board Approval Date: Not applicable

4. Other Approval Date: Approval Level: Chairman July 22, 2026 (Minguo Year 115)

5. Quantity Acquired, Unit Price, and Total Transaction Amount: Acquired Quantity (in thousands of shares): 1,000 Unit Price (NT$): 170.95 Total Transaction Amount (NT$): 170,945,000

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., pledged): Holding Balance: 100,000 shares, Amount: NT$171,000,000 Ownership Percentage: 0.02%, Rights Restriction: 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 Most Recent Financial Statements, and the Amount of Working Capital: Percentage of Total Assets: 174.5% Percentage of Equity Attributable to Owners of the Parent: 177.43% Working Capital Amount: NT$274,167,000

10. Specific Purpose of the Acquisition or Disposal: Investment portfolio management

11. Dissenting Directors' Opinions on this Transaction: Not applicable

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 Approval or Audit Committee's Consent: Not applicable

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

16. Other Explanatory Matters: None