ASE Holding Announces Subsidiary SPIL's Acquisition of Operational Equipment Exceeding NT$1 Billion

1. Name and nature of the subject matter (e.g., land located at Section XX, Subsection XX, North District, Taichung City): Operational equipment

2. Date of occurrence of fact: 115/6/22 ~ 115/6/23

3. Date of board approval: Not applicable

4. Other approval dates: Approval level: Approved by General Manager June 23, 2026 (Minguo Year 115)

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Acquired 2 batches Average unit price per batch: NT$1,401,717,624 Total transaction amount: NT$2,803,435,247

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: Lam Research International Sdn. Bhd. Relationship with the company: None

7. If the counterparty is a related party, state the reason for selecting the related party as the transaction counterparty, the previous transferor, the relationship among the previous transferor, the company, and the counterparty, the previous transfer date, and transfer amount: Not applicable

8. If the owner of the subject asset was a related party of the company within the past five years, state the related party's acquisition and disposal dates, 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 and explain recognition status): Not applicable

10. Delivery or payment terms (including payment period and amount), contractual restrictive clauses, and other important agreements: Telegraphic transfer (T/T) Contractual restrictive clauses: None Other important agreements: None

11. Method of determining this transaction (e.g., bidding, comparison, negotiation), reference basis for price determination, and decision-making unit: Transaction determination method: Comparison/negotiation Price determination reference basis: Reference to 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 yet obtaining the appraisal report: Not applicable

18. If there is a significant difference in appraisal results, state the reason and auditor's opinion: Not applicable

19. Name of accounting firm: Not applicable

20. Name of accountant: Not applicable

21. License number of accountant: Not applicable

22. Broker and brokerage fee: None

23. Specific purpose or use of the acquisition or disposal: For operational use

24. Opinion of any director who expressed dissent on 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 price assessed under Article 16 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies': Not applicable

29. Valuation price assessed under Article 17 of the same regulations if 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