ASE Holding Announces Subsidiary Huanhong Technology Acquires Right-of-Use Asset from Related Party

1. Name and nature of the subject property (e.g., land located at Section XX, Subsection XX, Beitun District, Taichung City): All factory buildings located at No. 330, Gongye Road, Nantou City, Nantou County (hereinafter referred to as the "Subject Property")

2. Date of occurrence: 06/30/115 ~ 06/30/115

3. Board approval date: June 30, 2026 (Minguo Year 115)

4. Other approval dates: Not applicable

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Transaction quantity: Total leased area of the Subject Property is 53,625 square meters, approximately equivalent to 16,221.56 ping Unit price (excluding tax): NT$110 per square meter per month Total transaction amount (excluding tax): Monthly rent of NT$5,898,750 The right-of-use asset is expected to be valued at approximately NT$203,211,423

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: Huan Dian Corporation Relationship with the company: Huanhong Technology Corp. and Huan Dian Corporation are both 100% indirectly held subsidiaries of the same parent company

7. If the counterparty is a related party, disclose the reason for selecting the related party as the transaction counterparty, the previous transferor, the relationship between the previous transferor and the company and the counterparty, the previous transfer date, and the transfer amount: Reason for selecting a related party as the counterparty: Operational needs Previous transfer: No transfer occurred. Ownership of the Subject Property has always remained with Huan Dian Corporation. This transaction involves only a lease and does not involve a sale.

Previous transferor and relationship with the company and counterparty: Not applicable Previous transfer date: Not applicable Previous transfer 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, disclose the date of acquisition and disposal, price, and the relationship with the company at the time of transaction: Not applicable

9. Expected 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: Payment terms: Payment according to the lease agreement Lease period: July 1, 2026 ~ June 30, 2029 (Either party may terminate the contract by providing one month’s prior notice to the other party during the contract term) Contractual restrictions: None Other important agreements: The parties may, based on changes in external conditions, actual usage needs, and other influencing factors, mutually agree to adjust the actual leased area, factory rent, and utility fees.

11. Decision method for this transaction (e.g., bidding, price comparison, negotiation), reference basis for price determination, and decision-making unit: Decision method and decision-making unit: Approved by the board resolution of Huanhong Technology Corp. Reference basis for price determination: Referenced professional appraisal report issued by a certified real estate appraiser

12. Name of the professional appraisal firm and appraisal value: Chung Hua Credit Information Real Estate Appraiser Joint Office Total appraisal value: Monthly rent of NT$5,937,091

13. Name of the professional appraiser: Chang Hsin-Chieh

14. License number of the professional appraiser: (112) Taipei City Appraisal No. 000320

15. Whether the appraisal report is for a limited 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. If there is a significant difference in the appraisal results, the reason and the accountant’s opinion: Not applicable

19. Name of the accounting firm: Not applicable

20. Name of the accountant: Not applicable

21. License number of the accountant: Not applicable

22. Broker and brokerage fees: None

23. Specific purpose or use of the acquisition or disposal: Operational needs

24. Opinion of any director who objected to this transaction: None

25. Whether this transaction is a related-party transaction: Yes

26. Date of approval by the auditor or audit committee: June 30, 2026 (Minguo Year 115)

27. Whether this transaction involves acquiring real estate or its right-of-use asset from a related party: Yes

28. Valuation under Article 16 of the "Asset Acquisition and Disposition Rules for Publicly Issued Companies": Not applicable

29. Valuation 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 for the same event: Not applicable

31. Other explanatory matters: None