【Unimicron】Announcement of the Record Date for Capital Increase from the Conversion of the Company's First Domestic Unsecured Convertible Bonds into Ordinary Shares in Q1 2026

1. Board of Directors resolution date: 115/04/28 (April 28, 2026) 2. Source of capital increase: The company's first domestic unsecured convertible corporate bonds 3. Whether new shares will be issued via shelf registration (Yes, please specify the planned issuance period/No): No 4. Total issuance amount and number of shares for the entire case (if it is a capital increase from earnings or capital reserve, the number of shares issued does not include those allocated to employees): Total issuance amount: NTD 137,152,590 Number of shares issued: 13,715,259 ordinary shares 5. For new share issuance cases via shelf registration, the amount and number of shares issued this time: Not applicable 6. For new share issuance cases via shelf registration, the remaining amount and number of shares after this issuance: Not applicable 7. Par value per share: NTD 10 8. Issuance price: Not applicable 9. Number of shares subscribed by employees or amount distributed: Not applicable 10. Number of shares publicly offered: Not applicable 11. Proportion for original shareholders' subscription or gratuitous distribution: Not applicable 12. Handling of odd lots and unsubscribed shares after the deadline: Not applicable 13. Rights and obligations of the new shares issued this time: Same as the originally issued ordinary shares 14. Purpose of this capital increase: Not applicable 15. Other matters to be specified: The record date for the capital increase from the conversion of the company's first domestic unsecured convertible corporate bonds into new shares is 115/05/02 (May 2, 2026).