Hoshino Announces Acquisition of 300,000 Shares of Yageo to Enhance Capital Efficiency

Date of Announcement: June 23, 2026 Date of Statement: June 22, 2025 Time of Statement: 19:11:04 Company Code: 2545 Company Name: Hoshino Subject: Announcement of Acquisition of Securities Applicable Clause: Clause 20 Date of Event: June 22, 2025

1. Name of Security: Yageo Corporation

2. Transaction Date: June 22, 2025 ~ June 22, 2025

3. Board Approval Date: Not applicable

4. Other Approval Date: Approval Level: Approved by Chairman June 22, 2025

5. Transaction Quantity, Unit Price, and Total Amount: Transaction Quantity: 300,000 shares Average Price per Share: NT$1,071.91 Total Transaction Amount: NT$321,574 thousand

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 in Terms of Quantity, Amount, Ownership Percentage, and Restrictions on Rights (e.g., Pledge): Quantity: 300,000 shares Amount: NT$321,574 thousand Ownership Percentage: 0.014%

9. Cumulative Securities Investment (including this transaction) under Article 3 of the 'Asset Acquisition and Disposal Rules for Publicly Issued Companies' as a Percentage of Total Assets and Equity Attributable to Owners of Parent in the Company's Most Recent Financial Statements, and the Amount of Working Capital in the Most Recent Financial Statements: Percentage of Total Assets: 0.581% Percentage of Equity Attributable to Owners of Parent: 2.153% Working Capital: NT$14,739,777 thousand

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

11. Dissenting Directors Regarding This Transaction: Not applicable

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: None