3711 ASE Holding

Announcement Date: 1150710 Statement Date: 1150709 Statement Time: 171031 Company Code: 3711 Company Name: ASE Holding Subject: Announcement on behalf of subsidiary ASE Semiconductor Manufacturing Co., Ltd. regarding the acquisition of machinery and equipment for business operations from Yang Fa Industrial Co., Ltd. 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): Machinery and equipment for business operations 2. Factual Date: 114/7/23 ~ 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 transaction units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Quantity: One batch, Unit price: NT$1,043,185 thousand (excluding tax), Cumulative total transaction amount: NT$1,043,185 thousand (excluding tax) 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: Yang Fa Industrial Co., Ltd., Relationship with the company: None 7. If the counterparty is a related party, state the reason for selecting the related party as the transaction party, the previous owner, the relationship between the previous owner, the company, and the counterparty, the previous transfer date, and the transfer amount: Not applicable 8. If the owner of the subject matter was a related party of the company within the past five years, state the date of acquisition and disposal by the related party, price, and relationship with the company at the time of transaction: Not applicable 9. Estimated gain (or loss) from disposal (not applicable for asset acquisition) (if deferred, provide a table showing recognition): Not applicable 10. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: Delivery or payment terms: Telegraphic transfer or letter of credit payment, Contractual restrictions: None, Other important agreements: None 11. Decision method for this transaction (e.g., bidding, price comparison, or negotiation), reference basis for price determination, and decision-making unit: Decision method and reference basis for price determination: Price comparison and negotiation, Decision-making unit: As per the company's approval authority regulations 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 yet 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 fees: None 23. Specific purpose or use of acquisition or disposal: For production and business operations 24. Dissenting opinions of directors regarding this transaction: Not applicable 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, when the price 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 statements: None