【Unimicron】Company Announcement Regarding Ordering Machinery and Equipment

1. Name and Nature of Target Object: Machinery and equipment. 2. Date of Occurrence: May 6, 2026. 3. Date of Board of Directors' Resolution: Not applicable. 4. Other Approval Dates: Approval level: Chairman. May 6, 2026 (Republic of China calendar year 115). 5. Quantity of Transaction Unit, Unit Price, and Total Transaction Amount: One batch, totaling NT$1,429,538 thousand. 6. Counterparty and its Relationship with the Company: WINTAKE INTERNATIONAL LIMITED, a non-related party. 7. If the Counterparty is a Related Party, the Reason for Selecting the Related Party as Transaction Counterparty, the Previous Owner, Relationship between the Previous Owner and the Company/Counterparty, Date and Amount of Previous Transfer Shall Also Be Announced: Not applicable. 8. If the Owner of the Transaction Object within the Past Five Years Was a Related Party of the Company, the Acquisition and Disposal Dates, Prices, and Relationship with the Company at the Time of Transaction of the Related Party Shall Also Be Announced: Not applicable. 9. Estimated Disposal Profit (or Loss) (Not applicable for asset acquisition) (For deferred cases, the recognition status should be listed and explained): Not applicable. 10. Delivery or Payment Terms (including payment period and amount), Contractual Restrictions, and Other Important Agreements: According to contract payment terms. 11. Method of This Transaction (e.g., tender, price comparison, negotiation), Reference Basis for Price Determination, and Decision-Making Unit: Price comparison and negotiation, handled according to the company's approval authority regulations. 12. Name of Professional Appraiser's Firm or Company and Appraisal Amount: Not applicable. 13. Name of Professional Appraiser: Not applicable. 14. Professional Appraiser's License Number: Not applicable. 15. Whether the Appraisal Report is a Limited Price, Specific Price, or Special Price: No or not applicable. 16. Whether the Appraisal Report Has Not Yet Been Obtained: Yes. 17. Reason for Not Yet Obtaining the Appraisal Report: Not applicable. 18. If There is a Material Difference in the Appraisal Results, the Reasons for the Difference and the Accountant's Opinion: Not applicable. 19. Name of Accounting Firm: Not applicable. 20. Name of Accountant: Not applicable. 21. Accountant's License Number: Not applicable. 22. Broker and Brokerage Fees: None. 23. Specific Purpose or Use of Acquisition or Disposal: For production use. 24. Opinions of Directors Who Expressed Dissent to This Transaction: Not applicable. 25. This Transaction is a Related Party Transaction: No. 26. Date of Approval by Supervisors or Audit Committee: Not applicable. 27. This Transaction Involves Acquisition of Real Estate or Right-of-Use Assets from a Related Party: No. 28. Price Evaluated According to Article 16 of the "Regulations Governing the Acquisition and Disposal of Assets by Public Companies": Not applicable. 29. If the Price Evaluated in the Preceding Item is Lower Than the Transaction Price, the Price Evaluated According to Article 17 of the Same Regulations: Not applicable. 30. Date of Previous Material Information Announcement Regarding the Same Event: Not applicable. 31. Other Matters to Be Stated: None.