3711 ASE Holding

Release Date: 1150724 Statement Date: 1150723 Statement Time: 172113 Company Code: 3711 Company Name: ASE Holding Subject: Announcement on behalf of subsidiary Siliconware Precision Industries (Ltd.) regarding acquisition of operational machinery exceeding NT$1 billion Compliance Clause: Item 20 Event Date: 1150723 Details: 1. Name and nature of the subject asset (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Operational machinery equipment 2. Event Date: 115/6/15 ~ 115/7/23 3. Board approval date: Not applicable 4. Other approval dates: Approval level: Approved by General Manager July 23, 115 (2026) 5. Quantity of units (e.g., XX square meters, converted to XX ping), unit price, and total transaction amount: Acquired 23 batches, average unit price: NT$50,377,372 Total transaction amount: NT$1,158,679,559 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: DTECH INTERNATIONAL CO., LTD.; Relationship with company: None 7. If the counterparty is a related party, disclose the reason for selection, previous owner, relationships among previous owner, company, and counterparty, previous transfer date, and amount: Not applicable 8. If the asset’s owner 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: Not applicable 9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, list recognition details): Not applicable 10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Wire transfer. Contractual restrictions: None. Other important agreements: None. 11. Transaction decision method (e.g., bidding, comparison, or negotiation), pricing reference basis, and decision-making unit: Transaction decision method: Comparison/negotiation. Pricing reference basis: Based on 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. Reasons for significant differences in appraisal results and accountant's opinion: Not applicable 19. Name of accounting firm: Not applicable 20. Name of accountant: Not applicable 21. Accountant's license number: Not applicable 22. Broker and brokerage fees: None 23. Specific purpose or use of acquisition or disposal: For business operations 24. Dissenting director's opinion on 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 'Asset Acquisition and Disposal Rules for Publicly Issued Companies': Not applicable 29. Price evaluated under Article 17 of the same rules when the price in 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 explanatory matters: None