Unimicron Acquires Factory Engineering Assets

1. Name and nature of the subject matter (e.g., land located at Section XX, Subsection XX, North District, Taichung City): Factory engineering

2. Date of occurrence: 114/6/17 ~ 115/6/12

3. Board approval date: Not applicable

4. Other approval dates: Approval level: Approved by Chairman Date: June 12, 115 (2026)

5. Quantity of transaction units (e.g., XX square meters, equivalent to XX ping), unit price, and total transaction amount: Quantity: One batch; Total transaction amount: NT$378,098,500

6. Counterparty and its relationship with the company (if the counterparty is an individual and not a related party, name disclosure may be omitted): Sheng-Chieh Environmental Engineering Co., Ltd.; Unrelated party

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

8. If the ownership of the subject asset was previously held by a related party of the company within the past five years, state 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) (if deferred, list recognition details): Not applicable

10. Delivery or payment terms (including payment periods and amounts), contractual restrictions, and other important agreements: Payment according to purchase order terms. Contractual restrictions and other important agreements: None

11. Decision method for this transaction (e.g., bidding, price comparison, negotiation), reference basis for price determination, and decision-making unit: Transaction decision method: Negotiation Price determination reference: Market conditions Decision-making unit: Approved under company procurement management regulations

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 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. Reasons for significant discrepancies in appraisal results and auditor's opinion: Not applicable

19. Name of auditor firm: Not applicable

20. Name of auditor: Not applicable

21. License number of auditor: Not applicable

22. Broker and brokerage fees: Not applicable

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

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 assets from a related party: No

28. Valuation price under Article 16 of the 'Regulations on 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 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