ASE Holding Announces Subsidiary SPIL (Suzhou) Secures Facility Engineering Project

1. Contract Type: Facility Engineering 2. Event Date: 114/12/24 ~ 115/8/25 3. Board Approval Date: Not applicable 4. Other Decision Dates: Decision Level: Approved by General Manager August 25, Minguo Year 115 5. Counterparty and Relationship to Company: Jiangsu Jianyuan Construction Co., Ltd. Relationship: None 6. Main Contract Contents (including total amount, expected investment amount, start and end dates), restrictive clauses, and other important terms: Total Amount: NTD 1,055,798,346; Contract Period: December 24, Minguo Year 114 to March 31, Minguo Year 116; Restrictive Clauses and Other Important Terms: None 7. Name of Professional Appraiser 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 Restricted Price, Specific Price, or Special Price: No or Not applicable 15. Has an Appraisal Report Not Been Obtained Yet: No or Not applicable 16. Reason for Not Obtaining Appraisal Report: Not applicable 17. Reasons for Significant Differences in Appraisal Results and Accountant's Opinion: Not applicable 18. Name of Accounting Firm: Not applicable 19. Name of Accountant: Not applicable 20. Accountant's License Number: Not applicable 21. Previous Material Information Disclosure Date for the Same Event: Not applicable 22. Other Disclosures: None