ASE Holding Announces Subsidiary SPIL's Acquisition of Production Equipment Worth NT$1.089 Billion

Disclosure Date: July 17, 115 Statement Date: July 16, 115 Statement Time: 18:35:32 Company Code: 3711 Company Name: ASE Holding Subject: Announcement on Behalf of Subsidiary Silicon Precision Industries Co., Ltd. Regarding Acquisition of Operating Equipment Exceeding NT$1 Billion Compliance Clause: Clause 20 Factual Date: July 16, 115

Details: 1. Name and Nature of the Subject Matter (e.g., land located in Section XX, Subsection XX, North District, Taichung City): Operating machinery and equipment

2. Factual Date: June 22, 115 ~ July 16, 115

3. Board Approval Date: Not applicable

4. Other Approval Dates: Approval Level: Approved by General Manager July 16, 115

5. Quantity of Transaction Units (e.g., XX square meters, equivalent to XX ping), Unit Price, and Total Transaction Amount: Acquired 4 batches, Average unit price per batch: NT$272,238,938, Total transaction amount: NT$1,088,955,750.

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: Veeco Process Equipment INC.; Relationship with the company: None

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

8. If the ownership of the subject asset was held by 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 of transaction: 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 periods and amounts), Contractual Restrictive Clauses, and Other Important Agreements: Telegraphic transfer. Contractual restrictive clauses: None. Other important agreements: None.

11. Transaction decision method (e.g., tender, competitive bidding, or negotiation), reference basis for price determination, and decision-making unit: Transaction decision method: Competitive bidding/negotiation. Reference basis for price determination: Based on 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 obtaining the appraisal report: Not applicable

18. Reasons for significant differences in appraisal results 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 fees: None

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

24. Dissenting director's opinion 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 its 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 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 Disclosures: None