Subsidiary SPIL Announces Acquisition of Operating Equipment Worth Over NTD 1 Billion

Date of Announcement: July 17, 2026 Date of Statement: July 16, 2026 Time of Statement: 18:33:28 Company Code: 3711 Company Name: ASE Holding Subject: Announcement by subsidiary Silicon Precision Industries Co., Ltd. regarding acquisition of operating machinery and equipment exceeding NTD 1 billion Applicable Clause: Clause 20 Date of Event: July 16, 2026 Details: 1. Name and nature of the subject matter (e.g., land located at Section XX, Subsection XX, North District, Taichung City): Operating machinery and equipment 2. Date of Event: June 22, 2026 ~ July 16, 2026 3. Board of Directors Approval Date: Not applicable 4. Other Approval Dates: Approval Level: Approved by General Manager July 16, 2026 5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Acquired 6 batches, Average unit price per batch: NTD 291,602,542, Total transaction amount: NTD 1,749,615,253. 6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party of the company, name disclosure may be omitted): Counterparty: Camtek Ltd.; Relationship with company: None 7. If the counterparty is a related party, state the reason for selecting the related party as the transaction counterparty, the previous transferee, the relationship among the previous transferee, the company, and the counterparty, the previous transfer date, and transfer amount: Not applicable 8. If the ownership of the subject matter was held by a related party of the company within the past five years, state the date of acquisition and disposal by the related party, price, and the relationship with the company at the time of transaction: Not applicable 9. Expected gain (or loss) on disposal (not applicable for asset acquisition) (if deferred, list and explain recognition status): Not applicable 10. Delivery or payment terms (including payment period and amount), contractual restrictive clauses, and other important agreements: Wire transfer. Contractual restrictive clauses: None. Other important agreements: None. 11. Method of determining this transaction (e.g., bidding, price comparison, or negotiation), reference basis for price determination, and decision-making unit: Transaction determination method: Price comparison/negotiation. Reference basis for price determination: Based on historical transaction data and market conditions. Decision-making unit: Decided 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 price, specific price, 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 the appraisal report: Not applicable 18. Reasons for significant differences in appraisal results and auditor's opinion: Not applicable 19. Name of auditor firm: Not applicable 20. Name of auditor: Not applicable 21. License number of auditor: Not applicable 22. Broker and brokerage fee: None 23. Specific purpose or use of the acquisition or disposal: For business operations 24. Opinion of any director who objected to this transaction: None 25. Whether this transaction is a related-party transaction: No 26. Date of supervisor approval or audit committee consent: Not applicable 27. Whether this transaction involves acquiring real estate or right-of-use assets from a related party: No 28. Valuation amount under Article 16 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies': Not applicable 29. Valuation amount under Article 17 of the same regulations if the valuation under the previous item is lower than the transaction price: Not applicable 30. Previous date of material information announcement regarding the same event: Not applicable 31. Other explanatory matters: None