AU Optronics Announces Participation in Kang Chou Securities' Corporate Briefing Session

Compliance with Clause 4, Paragraph XX: 12 Factual Date: August 6, 2026

1. Date of the Corporate Briefing Session: August 6, 2026 2. Time of the Corporate Briefing Session: 2:00 PM 3. Location of the Corporate Briefing Session: B1, No. 176, Section 1, Keelung Road, Xinyi District, Taipei City 110 4. Summary of the Briefing Session: AU Optronics will participate in the corporate briefing session hosted by Kang Chou Securities to present its business operations and financial overview based on the content of the Q2 2026 investor presentation. 5. Other Matters to be Disclosed: None

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