CTBC Securities Announces the List of the 7th Audit Committee Members

Announcement Regarding the Appointment of Audit Committee Members

CTBC Securities (the "Company") announces the appointment of members for its 7th Audit Committee as follows:

### 1. Overview of Changes - Date of change: May 19, 2026 - Name of functional committee: Audit Committee - Reason for change: Appointment of a new term of committee members following the expiration of terms.

### 2. Outgoing Members (Terms Expired) - Zhou Guannan (Independent Director of CTBC Securities) - Lin Jianzhi (Independent Director of CTBC Securities) - Ji Chonghui (Independent Director of CTBC Securities)

### 3. Newly Appointed Members - Zhang Mingjie (Chief Economist, Polaris Investment Bank) - He Gengyu (Professor, Department of Finance, National Taiwan University) - Yang Nianci (Professor, Department of Business Administration, National United University)

### 4. Effectiveness - The new appointments took effect on May 19, 2026.

These appointments were made based on the decision of the Board of Directors.