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

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

2. Date of occurrence: July 25, 2025 ~ July 21, 2026

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Approved by General Manager July 21, 2026, ROC calendar

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Acquired 28 batches, average unit price per batch: NTD 45,002,728 Total transaction amount: NTD 1,260,076,377

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: EO TECHNICS 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 transferor, the relationship among the previous transferor, the company, and the counterparty, the previous transfer date, and transfer amount: Not applicable

8. If the ownership of the subject matter had been held by a related party of the company within the past five years, disclose the related party's acquisition and disposal date, 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 recognition details): Not applicable

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

11. Decision method for this transaction (e.g., bidding, competitive bidding, or negotiation), reference basis for price determination, and decision-making unit: Transaction decision method: Competitive bidding/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 indicates 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 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 operational use

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 its right-of-use assets from a related party: No

28. Valuation price according to Article 16 of the 'Asset Acquisition and Disposal Handling Standards for Publicly Issued Companies': Not applicable

29. Valuation price according to Article 17 of the same standards, if the valuation 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 explanatory matters: None