3711 ASE Holding

Disclosure Date: 1150626 Statement Date: 1150625 Statement Time: 184408 Company Code: 3711 Company Name: ASE Holding Subject: Announcement on behalf of subsidiary Silicon Precision Industries Co., Ltd. regarding board resolution to acquire land use rights asset Relevant Clause: Clause 20 Event Date: 115/6/25~115/6/25 Details: 1. Name and nature of the subject property (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Land in Zone 12 and Zone 28, Southern Taiwan Science Park 2. Event Date: 115/6/25~115/6/25 3. Board approval date: June 25, 2026 (Minguo Year 115) 4. Other approval dates: Not applicable 5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Leased land area: 139,369 square meters Unit price (excluding tax): NT$37.59 per square meter per month Total transaction amount: Land use rights asset valued at approximately NT$1,490,495,384 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: Southern Science Park Administration, National Science and Technology Council Relationship with the company: None 7. If the counterparty is a related party, disclose the reason for selecting the related party, the previous transferor, the relationship among the previous transferor, the company, and the counterparty, the previous transfer date, and the transfer amount: Not applicable 8. If the owner of the subject asset within the past five years was a related party of the company, disclose the related party’s acquisition and disposal dates, 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 schedule and amounts), contractual restrictions, and other important agreements: Payment terms: Monthly rental payments Lease term: 20 years Contractual restrictions: None Other important agreements: None 11. Method of transaction determination (e.g., bidding, price comparison, or negotiation), basis for price determination, and decision-making unit: Transaction determination method: In accordance with land rental regulations of the Southern Science Park Administration, National Science and Technology Council Decision-making unit: Board of Directors 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 an appraisal report: Not applicable 18. Reasons for significant differences in appraisal results and auditor’s opinion: Not applicable 19. Name of accounting firm: Not applicable 20. Name of auditor: Not applicable 21. Auditor’s license number: Not applicable 22. Broker and brokerage fees: None 23. Specific purpose or use of the acquisition or disposal: To meet operational needs 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 its usage rights from a related party: No 28. Evaluation price under Article 16 of the 'Regulations on the Acquisition or Disposal of Assets by Publicly Issued Companies': Not applicable 29. Evaluation price 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