[Yageo] Participation in the "Morgan Stanley Asia AI Summit 2026" Hosted by Morgan Stanley

In accordance with Article 4, Paragraph XX of the Regulations: 12 Date of occurrence: 115/05/28

1. Date of investor conference: 115/05/28 2. Time of investor conference: 13:30 3. Location of investor conference: Mandarin Oriental, Taipei 4. Summary of investor conference: The company is invited to participate in the "Morgan Stanley Asia AI Summit 2026," hosted by Morgan Stanley on 115/05/28, to explain the company's operations and industry overview to institutional investors. 5. Other relevant information: Company website at www.yageo.com/zh-TW/Download/Index/investor_conference#bottom_link_title Full financial and operational information is available on the Market Observation Post System under the investor conference schedule or items.