Unimicron's Subsidiary ITEQ Corporation (Thailand) LTD Announces Acquisition of Machinery and Equipment Exceeding NT$500 Million from a Single Vendor

1. Name and nature of the target (e.g., land parcel in XX section, XX sub-section, Taichung City North District): Machinery and equipment for business operations 2. Date of occurrence of the event: 114/7/29~115/5/5 3. Date of board approval: May 5, 115 (Republic of China calendar) 4. Other approval dates: Not applicable 5. Quantity of transaction units (e.g., XX square meters, converted to XX pings), unit price, and total transaction amount: Quantity: Three batches Total transaction amount: Approximately NT$604,123 thousand 6. Counterparty of the transaction and its relationship with the company (if the counterparty is a natural person and not a related party of the company, their name may be omitted): Yatai Metal Industry Co., Ltd.; Relationship with the company: None. 7. If the counterparty is a related party, the reasons for selecting the related party as the transaction object, the previous owner's name, the relationship between the previous owner and the company and the counterparty, the date of previous transfer, and the transfer amount shall also be announced: Not applicable 8. If the owner of the transaction target has been a related party of the company within the past five years, the dates and prices of acquisition and disposal by the related party and its relationship with the company at the time of the transaction shall also be announced: Not applicable 9. Estimated disposal gain (or loss) (not applicable for asset acquisition) (for deferred cases, the recognition status should be listed): Not applicable 10. Delivery or payment terms (including payment period and amount), contractual restrictions, and other important agreements: Payment according to contract terms. 11. Method of determining this transaction (e.g., bidding, price comparison, or negotiation), basis for price determination, and decision-making unit: Decision method: Price comparison and negotiation Decision-making unit: According to the company's approval authority regulations. 12. Name of professional appraiser's office or company and its appraisal amount: Not applicable 13. Name of professional appraiser: Not applicable 14. Professional appraiser's certificate number: Not applicable 15. Is the appraisal report a limited price, specific price, or special price: No or Not applicable 16. Has the appraisal report not yet been obtained: No or Not applicable 17. Reason for not yet obtaining the appraisal report: Not applicable 18. If there is a material difference in the appraisal results, the reason for the difference and the auditor's opinion: Not applicable 19. Name of accounting firm: Not applicable 20. Name of accountant: Not applicable 21. Accountant's certificate number: Not applicable 22. Broker and brokerage fees: Not applicable 23. Specific purpose or use of acquisition or disposal: For production and operational use 24. Opinions of directors who expressed dissent on this transaction: Not applicable 25. Is this transaction a related party transaction: No 26. Date of approval by supervisors or audit committee: 1. Year Month Day 2. Not applicable, please state the reason (Please add or delete the above text as appropriate) 27. Is this transaction for the acquisition of real estate or its right-of-use asset from a related party: No 28. Price assessed according to Article 16 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies": Not applicable 29. If the price assessed in the preceding item is lower than the transaction price, the price assessed according to Article 17 of the same regulations: Not applicable 30. Date of previous material information announcement for the same event: Not applicable 31. Other matters to be specified: None