2545 Hoshino: Acquires 432,000 Shares of Yageo to Enhance Capital Efficiency

Release Date: July 2, 2026 Statement Date: July 1, 2026 Statement Time: 18:56:34 Company Code: 2545 Company Name: Hoshino Subject: Announcement of Acquisition of Securities Applicable Clause: Item 20 Factual Date: July 1, 2026

1. Security Name: Yageo Corporation

2. Transaction Date: July 1, 2026 ~ July 1, 2026

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Chairman Approval July 1, 2026

5. Transaction Quantity, Unit Price, and Total Amount: Quantity: 432,000 shares Average Price per Share: NT$1,186.57 Total Transaction Amount: NT$512,598 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 – Quantity, Amount, Ownership Ratio, and Restrictions (e.g., Pledge): Quantity: 432,000 shares Amount: NT$512,598 thousand Ownership Ratio: 0.021%

9. Cumulative Securities Investments under Paragraph 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 Latest Financial Statements, and the Amount of Working Capital: Percentage of Total Assets: 0.926% Percentage of Equity Attributable to Owners of Parent: 3.432% Working Capital: NT$14,739,777 thousand

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

11. Directors' Objections to 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