Unimicron Announces Issuance Terms for Cash Capital Increase and Global Depositary Receipts

1. Date of Event: July 6, 115 2. Company Name: Unimicron Electronics Co., Ltd. 3. Relationship with Company: Parent Company 4. Cross-shareholding Ratio: Not applicable 5. Reason for Announcement: Announcement of the pricing completion for the company's cash capital increase to issue ordinary shares for participation in the issuance of Global Depositary Receipts (GDRs) 6. Countermeasures: None 7. Other Matters to be Disclosed:

I. Issuance Terms for the Company's Cash Capital Increase to Issue Ordinary Shares for Participation in GDRs: (1) Total Issuance Amount: USD 1,355,000,000 (2) Unit Issuance Price: USD 27.1 per unit (3) Total Number of Units Issued: 50,000,000 GDR units, representing 50,000,000 ordinary shares (4) Pricing Date: July 6, 115 (5) Scheduled Issuance Date: July 9, 115 (6) Number of Shares Represented per GDR Unit: 1 GDR unit represents 1 ordinary share of the company (7) Price per Share: Approximately TWD 868 (converted at an exchange rate of USD 1 = TWD 32.04)

II. Issuance and Trading Venue: Luxembourg Stock Exchange

III. Subscription by Specific Parties: None

IV. Fund Utilization Plan and Expected Benefits: The proceeds will be used for foreign currency procurement of raw materials. This is expected to reduce annual interest expenses, strengthen the company's financial structure, and enhance future operational competitiveness, providing positive long-term benefits for the company's development.

V. Main Impact on Shareholders' Equity: The issuance of 50,000,000 new ordinary shares through cash capital increase for GDR participation will result in a share dilution of approximately 3.05%, which is not considered to have a significant adverse impact on shareholders' equity.