Unimicron Technology Corp. acquired a real estate transaction. Name and nature of the underlying asset (e.g., land located at Sublot XX, Lot XX, North District, Taichung City): The building is located at No.

4, Hejiang 2nd Road, Zhongli District, Taoyuan City Land located at No. 323, Zhonggong Section, Zhongli District, Taoyuan City. Date of occurrence of the event is June 18, 2024.

Transaction unit amount (e.g.XX square meters, equivalent to XX ping), unit price, and total transaction price: land area is about 883.91 ping and The building area is about 1,165.84 ping. Price per unit: land: TWD 375,000 per Ping. The building: TWD 7,423 per Ping.

Total transaction amount: land: TWD 331,466,250. The building: TWD 8,654,029. Trading counterparty and its relationship with the Company (if the trading counterparty is a natural person and furthermore is not a related party of the Company, the name of the trading counterparty is not required to be disclosed): TA SHIN PRECISION INDUSTRIAL CO., LTD. Relationship with the company: non-related party.

Date of the board of directors resolution is June 18, 2024. Date of ratification by supervisors or approval by the audit committee is June 18, 2024.