We would like to announce the change in personnel of Big Investment Group Joint Stock Company as follows:

In case of appointment:

1. Mr. Kieu Van Khoa

• Position held prior to appointment: Vice Chairman of the Board of Directors for the 2024-2029 term.
• Newly appointed position: Chairman of the Board of Directors for the 2024-2029 term, Legal Representative (pursuant to the Company's Charter, the Chairman of the BOD shall serve as the Legal Representative).
• Term of appointment: From May 27, 2026, until further decision of the Company.
• Effective date: May 27, 2026.

2. Mr. Vo Phi Nhat Huy

• Position held prior to appointment: Chairman of the Board of Directors for the 2024-2029 term, Legal Representative (pursuant to the Company's Charter, the Chairman of the BOD shall serve as the Legal Representative).
• Newly appointed position: Vice Chairman of the Board of Directors for the 2024-2029 term, Chief Executive Officer (General Director) for the 2025-2030 term.
• Term of appointment: From May 27, 2026, until further decision of the Company.
• Effective date: May 27, 2026.

3. Ms. Tran Thi Mua Thao

• Position held prior to appointment: Member of the Board of Directors for the 2024-2029 term, Chief Executive Officer (General Director) for the 2025-2030 term, Person Authorized to Disclose Information, Person in Charge of Corporate Governance.
• Newly appointed position: Deputy Chief Executive Officer (Deputy General Director) in charge of Commercial Affairs.
• Term of appointment: From May 27, 2026, until further decision of the Company.
• Effective date: May 27, 2026.

In case of dismissal:

1. Mr. Kieu Van Khoa

• Position held prior to dismissal: Vice Chairman of the Board of Directors for the 2024-2029 term.
• Positions no longer held: Vice Chairman of the Board of Directors for the 2024-2029 term.
• Positions retained: Chairman of the Board of Directors for the 2024-2029 term, Legal Representative (pursuant to the Company's Charter, the Chairman of the BOD shall serve as the Legal Representative).
• Reason for dismissal: Pursuant to the Board of Directors Resolution No. 05/2026/BIG/QĐ-HĐQT dated May 27, 2026.
• Effective date: May 27, 2026.

2. Mr. Vo Phi Nhat Huy

• Position held prior to dismissal: Chairman of the Board of Directors for the 2024-2029 term, Legal Representative (pursuant to the Company's Charter, the Chairman of the BOD shall serve as the Legal Representative).
• Positions no longer held: Chairman of the Board of Directors for the 2024-2029 term, Legal Representative (pursuant to the Company's Charter, the Chairman of the BOD shall serve as the Legal Representative).
• Positions retained: Vice Chairman of the Board of Directors for the 2024-2029 term, Chief Executive Officer (General Director) for the 2025-2030 term.
• Reason for dismissal: Pursuant to the Board of Directors Resolution No. 06/2026/BIG/QĐ-HĐQT dated May 27, 2026.
• Effective date: May 27, 2026.

3. Ms. Tran Thi Mua Thao

• Position held prior to dismissal: Member of the Board of Directors for the 2024-2029 term, Chief Executive Officer (General Director) for the 2025-2030 term, Person Authorized to Disclose Information, Person in Charge of Corporate Governance.
• Position(s) no longer held: Chief Executive Officer (General Director) for the 2025-2030 term.
• Position(s) retained: Member of the Board of Directors for the 2024-2029 term, Person Authorized to Disclose Information, Person in Charge of Corporate Governance, Deputy Chief Executive Officer (Deputy General Director) in charge of Commercial Affairs.
• Reason for dismissal: Pursuant to the Board of Directors Resolution No. 07/2026/BIG/QĐ-HĐQT dated May 27, 2026.
• Effective date: May 27, 2026.