ASE Holding Announces Subsidiary's Acquisition of Machinery and Equipment for Business Use from Disco Corporation

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 use

2. Date of occurrence: 115/7/3 ~ 115/8/3

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Approved by General Manager Date: August 3, 2026 (Minguo Year 115)

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Transaction quantity: One batch Unit price: NT$1,005,907 thousand (excluding tax) Total transaction amount: NT$1,005,907 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: Disco High-Tech Corporation 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 between the previous transferor and the company and the counterparty, the previous transfer date, and the transfer amount: Not applicable

8. If the subject asset had an owner who 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 the relationship with the company at the time: 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 period and amount), contractual restrictions, and other important agreements: Delivery or payment terms: Payment by telegraphic transfer or letter of credit Contractual restrictions: None Other important agreements: None

11. Method of determining the transaction (e.g., bidding, competitive quotation, or negotiation), basis for price determination, and decision-making unit: Transaction determination method and pricing basis: Competitive quotation and negotiation Decision-making unit: In accordance with the company's authorization rules

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

13. Name of the professional appraiser: Not applicable

14. License number of the professional appraiser: Not applicable

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

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

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

18. Reasons for significant differences in valuation results and auditor's opinion: Not applicable

19. Name of the accounting firm: Not applicable

20. Name of the auditor: Not applicable

21. License number of the auditor: Not applicable

22. Broker and brokerage fees: None

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

24. Opinion of any director who objected to the transaction: Not applicable

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 amount under Article 16 of the 'Asset Acquisition or Disposal Rules for Publicly Issued Companies': Not applicable

29. Valuation amount 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 disclosure regarding the same event: Not applicable

31. Other explanatory matters: None