3711 ASE Holding

Disclosure Date: 1150710 Statement Date: 1150709 Statement Time: 175103 Company Code: 3711 Company Name: ASE Holding Subject: Announcement on behalf of subsidiary Siliconware Precision Industries Co., Ltd. regarding the acquisition of operational machinery and equipment exceeding ten billion NTD Compliance Clause: Item 20 Factual Date: 1150709 Details: 1. Name and nature of the subject matter (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Operational machinery and equipment 2. Factual date: 115/5/11 ~ 115/7/9 3. Board approval date: Not applicable 4. Other approval dates: Approval level: Approved by General Manager July 9, 115 (2026) 5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Acquired 7 batches, Average unit price per batch: NTD 501,994,395, Total transaction amount: NTD 3,513,960,763. 6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): Counterparty: Fan Hsuan System Technology Co., Ltd.; Relationship with company: None 7. If the counterparty is a related party, disclose the reason for selecting them, previous owner, relationships among previous owner, company, and counterparty, previous transfer date, and amount: Not applicable 8. If the owner of the subject matter within the past five years was a related party of the company, disclose the related party's acquisition and disposal date, price, and relationship with the company at the time of transaction: Not applicable 9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, provide a table showing recognition): Not applicable 10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Payment by telegraphic transfer. Contractual restrictions: None. Other important agreements: None. 11. Transaction decision method (e.g., bidding, comparison, or negotiation), reference basis for price determination, and decision-making unit: Transaction decision method: Comparison/negotiation. Reference basis for price determination: Historical transaction data and market conditions. Decision-making unit: Determined according to internal company approval authority. 12. Name of professional appraiser firm or company and appraisal amount: Not applicable 13. Name of professional appraiser: Not applicable 14. License number of professional appraiser: Not applicable 15. Whether the appraisal report is for a limited, specific, or special price: No or not applicable 16. Whether an appraisal report has not yet been obtained: No or not applicable 17. Reason for not obtaining appraisal report: Not applicable 18. If there is a significant difference in appraisal results, explain the reason and include auditor's opinion: Not applicable 19. Name of accounting firm: Not applicable 20. Name of auditor: Not applicable 21. License number of auditor: Not applicable 22. Broker and brokerage fees: None 23. Specific purpose or use of acquisition or disposal: For operational use 24. Dissenting opinions from directors regarding this transaction: None 25. This transaction is a related-party transaction: No 26. Date of supervisor approval or audit committee consent: Not applicable 27. This transaction involves acquiring real estate or right-of-use assets from a related party: No 28. Price evaluated under Article 16 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies': Not applicable 29. Price evaluated under Article 17 of the same regulations if the price under the previous item is lower than the transaction price: Not applicable 30. Previous date of material information disclosure regarding the same event: Not applicable 31. Other disclosures: None