1. Name of individual performing the transaction:

– Ms. Nguyen Thuy Duong – Internal shareholder   – Position: Member of the Board of Directors

– And related person: Mrs. Nguyen Thi Hoi – Relationship: Birth mother

2. Trading stock code: S55

3. Number of shares held before trading: 502,400 shares, equivalent to 5.03%, specifically:

– Grandma. Nguyen Thuy Duong holds: 179,500.0 shares (equivalent to 1.80%)
– Grandma. Nguyen Thi Hoi holds: 322,900.0 shares (equivalent to 3.23%)
4. Number of shares sold: 502,400 shares, equivalent to 5.03%

5. Number of shares held after performing the transaction: 00 shares (corresponding to 00%)

6. Trading method: Order matching or agreement

7. Transaction time: May 15th, 2023