[WT Microelectronics] Announcement Regarding Participation in Subsidiary e-Imagine's Cash Capital Increase

1. Name and nature of the target: Common stock of e-Imagine Technology Co., Ltd. (hereinafter "e-Imagine"). 2. Date of occurrence: May 22, 2026. 3. Date of board approval: May 22, 2026. 4. Transaction volume and total amount: 13,383,441 shares at 24.586333 TWD per share, totaling 329,049,738 TWD. 5. Relationship with the counterparty: A subsidiary in which WT Microelectronics holds a 60.3% stake. 6. Purpose of acquisition: Long-term equity investment to supplement operating capital and improve the subsidiary's financial structure. 7. Status after transaction: Accumulated 14,390,042 shares held, 54.65% stake. 8. Source of funding: Own capital.