ASE Holdings 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: May 11, 2026 to July 9, 2026 (Minguo Year 115)

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Approved by General Manager July 9, 2026 (Minguo Year 115)

5. Quantity of units (e.g., XX square meters, converted to XX ping), unit price, and total transaction amount: Acquired 7 batches Average unit price per batch: NT$501,994,395 Total transaction amount: NT$3,513,960,763

6. Counterparty and its relationship with the company (if the counterparty is a natural person and not a related party, name disclosure may be omitted): Counterparty: Fan Hsuan System Technology Inc. Relationship with the company: None

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

8. If the asset’s owner was a related party of the company within the past five years, disclose the date, price, and relationship with the company at the time of acquisition and disposal: 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 periods and amounts), contractual restrictions, and other important agreements: Telegraphic transfer (T/T) Contractual restrictions: None Other important agreements: None

11. Method of transaction determination (e.g., bidding, price comparison, negotiation), basis for price determination, and decision-making unit: Transaction determination method: Price comparison / negotiation Basis for price determination: Reference to historical transaction data and market conditions Decision-making unit: Determined according to internal company approval authority

12. Name of professional valuation firm or company and valuation amount: Not applicable

13. Name of professional appraiser: Not applicable

14. License number of professional appraiser: Not applicable

15. Whether the valuation report is for a limited price, specific price, or special price: No or not applicable

16. Whether a valuation report has not yet been obtained: No or not applicable

17. Reason for not obtaining a valuation report: Not applicable

18. If there is a significant difference in the valuation results, explain the reason and provide the accountant'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 fees: None

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

24. Opinion of any director who objected to the 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 the 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 and Disposal Rules for Publicly Issued Companies': Not applicable

29. Valuation price under Article 17 of the same rules, 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 explanatory matters: None