ASE Holding Announces Subsidiary Taiwan Fuhres Electronics Acquires Facility Engineering Assets from Chuan Hsing Construction

1. Name and nature of the subject asset (e.g., land located at Section X, Subsection X, North District, Taichung City): Facility engineering assets for operational use

2. Date on which the event occurred: 115/9/23 ~ 115/9/23

3. Board approval date: Not applicable

4. Other decision dates: Decision level: Approved by General Manager September 23, 2026 (Minguo Year 115)

5. Quantity of units transacted (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Quantity: One batch Unit price: NT$2,920,000 thousand (excluding tax) Cumulative total transaction amount: NT$2,920,000 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: Chuan Hsing Construction Co., Ltd. Relationship with the company: None

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

8. If the asset was previously owned by a related party of the company within the past five years, disclose the date of acquisition and disposal by the related party, price, and relationship with the company at the time: Not applicable

9. Estimated gain (or loss) on disposal (not applicable for asset acquisition) (deferred gains shall include recognition schedule): Not applicable

10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Delivery or payment terms: Payment via telegraphic transfer or letter of credit Contractual restrictions: None Other important agreements: None

11. Method of determining the transaction (e.g., tender, competitive bidding, or negotiation), basis for price determination, and decision-making unit: Transaction determination method and pricing basis: Competitive bidding and negotiation Decision-making unit: As per the company’s internal authorization policy

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 restricted 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 obtaining the appraisal report: Not applicable

18. Reasons for significant discrepancies 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 production and operational use

24. Dissenting director’s opinion regarding this 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 price under Article 16 of the 'Regulations Governing the Acquisition or Disposition of Assets by Publicly Issued Companies': Not applicable

29. Valuation price under Article 17 of the same regulations if the valuation under the preceding 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