Unimicron Corrects Endorsement Guarantee Disclosure for June 2026

1. Factual Date: 115/07/20 2. Company Name: Unimicron Technology Corporation 3. Relationship with Company (Please enter本公司or Subsidiary):本公司 4. Cross-shareholding Ratio: Not applicable 5. Reason for Occurrence: Correction of the detailed disclosure table for the company's endorsement guarantees in June 115 6. Item/Report Name to be Corrected: Detailed Disclosure Table of Endorsement Guarantees 7. Amount/Content/Page Before Correction: Endorsement Guarantee Reporting for Others in June 115 Unit: NT$ Thousand Endorsed Party Actual Drawdown Amount --------------------------- ------------------------ UniGreat Holding Limited 101,888 8. Amount/Content/Page After Correction: Endorsement Guarantee Reporting for Others in June 115 Unit: NT$ Thousand Endorsed Party Actual Drawdown Amount --------------------------- ------------------------ UniGreat Holding Limited 105,072 9. Response Measures: Corrected information has been re-uploaded to the Public Information Observation Station. 10. Other Matters to be Stated: None.