Unimicron Announces Acquisition of Machinery and Equipment from Mirle Automation

1. Name and nature of the underlying asset: Machinery and equipment 2. Date of occurrence: July 9, 2025, to April 24, 2026 3. Date of board resolution: Not applicable 4. Other approval date: Approved by the Chairman on April 24, 2026 5. Quantity, price per unit, and total transaction amount: Quantity: One batch; Total transaction amount: TWD 1,002,892,000 6. Counterparty and its relationship with the company: Mirle Automation Corporation; non-related party 7. Where the counterparty is a related party: Not applicable 8. Where the asset owner in the last 5 years was a related party: Not applicable 9. Expected gain or loss from disposal: Not applicable for acquisition of assets 10. Delivery or payment terms: Payment based on order terms; no restrictive clauses 11. Method of determination, price reference, and decision-making unit: Negotiation based on market prices; approved according to procurement management regulations 12. Name of professional appraiser and appraisal amount: Not applicable 13. Name of professional appraiser: Not applicable 14. Appraiser license number: Not applicable 15. Whether the appraisal report is for limited, specific, or special price: No or not applicable 16. Whether appraisal report is not yet obtained: No or not applicable 17. Reason for not obtaining appraisal report: Not applicable 18. Accountant's opinion on significant differences in appraisal results: Not applicable 19. Name of accounting firm: Not applicable 20. Name of accountant: Not applicable 21. Accountant license number: Not applicable 22. Broker and broker fee: Not applicable 23. Concrete purpose or use of acquisition/disposal: For production use 24. Opinions of dissenting directors: Not applicable 25. Whether the transaction is a related party transaction: No 26. Date of Supervisor approval or Audit Committee agreement: Not applicable 27. Whether the transaction involves acquisition of real estate from related parties: No 28. Price evaluated according to Article 16 of the Regulations: Not applicable 29. Price evaluated according to Article 17 where Article 16 price is lower: Not applicable 30. Date of previous announcement on the same event: Not applicable 31. Other matters specified: None