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

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

2. Date of occurrence of fact: 7/25/2025 ~ 7/23/2026

3. Date of board approval: Not applicable

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

5. Quantity of transaction units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Acquired 133 batches, average unit price per batch: NT$10,591,418 Total transaction amount: NT$1,408,658,553

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: AURIGIN TECHNOLOGY PTE 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 counterparty, the previous transferor, the relationship between the previous transferor and the company and the counterparty, the previous transfer date, and the transfer amount: Not applicable

8. If the ownership of the transaction subject 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 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, list the recognition status): Not applicable

10. Delivery or payment terms (payment period and amount), contractual restriction clauses, and other important agreements: Wire transfer. Contractual restriction clauses: None. Other important agreements: None.

11. Decision method of this transaction (e.g., bidding, competitive quotation, or negotiation), reference basis for price determination, and decision-making unit: Transaction decision method: Competitive quotation/negotiation. Reference basis for price determination: 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 the 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 fee: None

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

24. Opinion of directors who expressed dissent 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. Valuation price under Article 16 of the 'Asset Acquisition or Disposal Rules for Publicly Issued Companies': Not applicable

29. Valuation price under Article 17 of the same rules 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