ASE Holding Announces Subsidiary SPIL's Acquisition of Facility Engineering Project

1. Type of Contract: Facility Engineering
2. Date of Event: June 19, 2025 (Minguo Year 114) to June 15, 2026 (Minguo Year 115)
3. Board Approval Date: Not applicable
4. Other Approval Dates:
Approval Level: Approved by General Manager
Date: June 15, 2026 (Minguo Year 115)
5. Counterparty and Relationship with Company:
Boyang Systems Technology Co., Ltd.
Relationship with Company: None
6. Main Contract Contents (including total contract value, estimated investment amount, contract period, restrictive clauses, and other important terms):
Total Value: NT$505,216,500
Contract Period: June 19, 2025 (Minguo Year 114) to November 1, 2028 (Minguo Year 117)
Restrictive Clauses and Other Important Terms: None
7. Name of Professional Appraisal Firm or Company and Appraisal Result: Not applicable
8. Name of Real Estate Appraiser: Not applicable
9. License Number of Real Estate Appraiser: Not applicable
10. Specific Purpose of Acquisition:
For production and operational use
11. Dissenting Director Opinions on This Transaction: None
12. Is This a Related-Party Transaction? No
13. Date of Supervisor Approval or Audit Committee Consent: Not applicable
14. Is the Appraisal Report a Limited, Specific, or Special Price? No or Not applicable
15. Has the Appraisal Report Not Yet Been Obtained? No or Not applicable
16. Reason for Not Yet Obtaining the Appraisal Report: Not applicable
17. Reasons for Significant Differences in Appraisal Results and Auditor's Opinion: Not applicable
18. Name of Accounting Firm: Not applicable
19. Name of Auditor: Not applicable
20. Auditor's License Number: Not applicable
21. Previous Date of Material Information Disclosure on the Same Event: Not applicable
22. Other Explanatory Matters: None