【Chih Shin】Announcement of Cumulative Acquisition Amount of the Same Securities within One Year

1. Security Name: Yageo Corporation

2. Transaction Date: October 1, 2025 – July 20, 2026 (R.O.C. Calendar)

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Chairman Approval, July 20, 2026 (R.O.C. Year 115)

5. Transaction Quantity, Unit Price, and Total Transaction Amount: Quantity: 1,095,000 shares, Unit Price: Average NT$276.29, Total Amount: NT$302,541,732

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 Rights Restrictions (e.g., Pledge): Quantity: 85,000 shares, Amount: NT$78,341,102, Ownership Percentage: 0.00%, Rights Restrictions: None

9. Cumulative Securities Investments under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' (including this transaction) as a Percentage of 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: 47.37%, Percentage of Equity Attributable to Parent Owners: 55.40%, Working Capital Amount: NT$2,264,183,000

10. Specific Purpose of Acquisition or Disposal: Short-term capital deployment

11. Dissenting Director’s Opinion 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. Supervisor Approval or Audit Committee Consent Date: 1. Not applicable, Reason:

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

16. Other Explanatory Matters: None