[U-Precision] Notice of Investor Briefing Hosted by Fubon Securities

Compliance with Article 4, Clause XX: 12 Date of event: 2026/05/21 1. Date of investor briefing: 2026/05/21 2. Time of investor briefing: 14:00 3. Location of investor briefing: 14F, No. 6, Section 1, Zhongxiao West Road, Taipei City (Fubon Securities, 14F) 4. Briefing highlights: The company was invited by Fubon Securities to hold an investor briefing. 5. Other matters: None

Full financial and operational information is available on the Market Observation Post System under the investor briefing list or section.