ASE Holding Announces Subsidiary ASE Semiconductor Manufacturing Co., Ltd. Acquires Land Use Rights

1. Name and nature of the subject property (e.g., land located at XX Section, XX Subsection, North District, Taichung City): Land located at Lot 55 and Lot 58, Xinkē Segment, Southern Taiwan Science Park, Tainan Campus

2. Date of occurrence: June 24, 115 ~ June 24, 115

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Approved by the General Manager of the Kaohsiung Plant June 24, 115 (Minguo calendar)

5. Quantity of units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Quantity: Land area of 84,207.65 square meters (approximately 25,472.81 ping) Unit price: Monthly rent of NT$3,165,366 (excluding tax) Total transaction amount: Total right-of-use asset value of NT$829,296,972 (excluding tax)

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): Counterparty: Southern Science Park Administration, National Science and Technology Council (hereinafter referred to as 'Southern Park Administration') 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 owner of the subject asset was 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. 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: Payment terms: As stipulated in the contract Lease term: 20 years Contractual restrictions: None Other important agreements: None

11. Method of determining this transaction (e.g., bidding, comparison, negotiation), reference basis for price determination, and decision-making unit: Method and decision-making unit: Executed in accordance with ASE Semiconductor Manufacturing Co., Ltd.'s approval authority Reference basis for price determination: Based on the land rental regulations of the Southern Park Administration

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. If there is a significant difference in the appraisal result, explain the reason and include 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 fee: None

23. Specific purpose or use of the acquisition or disposal: Capacity expansion

24. Opinion of any director who objected to 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 its right-of-use asset 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 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