Giantec Invited to Yuanta Securities Domestic Investor Briefing

Pursuant to Clause 4, Article XX, Item 12: 12

Factual Date: 115/08/14

1. Date of Investor Briefing: 115/08/14 2. Time of Investor Briefing: 14:30 3. Location of Investor Briefing: International Conference Hall, Building B, No. 209, Section 1, Nangang Road, Nangang District, Taipei City 4. Summary of Investor Briefing: Giantec was invited by Yuanta Securities to participate in its domestic investor briefing, during which the company presented relevant information including publicly released financial figures and operational performance for the second quarter of 2026. 5. Other Matters to be Stated: None.

For complete financial and business information, please refer to the investor briefing schedule or the investor presentation section on the Public Information Observation Station.