MEC Announces Invitation to Investor Conference Hosted by Taishin Securities

In compliance with Article 4, Paragraph XX, Item 12 of regulations. Date of occurrence: 2026/05/21

1. Date of investor conference: 2026/05/21 2. Time of investor conference: 14:30 3. Location of investor conference: 13F, No. 96, Section 1, Jianguo North Road, Zhongshan District, Taipei City 4. Summary of investor conference: To explain operational status and future outlook. 5. Other notes: None

For complete financial and business information, please refer to the investor conference schedule or the investor conference section on the Market Observation Post System website.