1. Name of individual performing the transaction:

– Mr. 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 registered for sale: 502,400 shares, equivalent to 5.03%

5. Number of shares expected to hold after trading: 00 shares (corresponding to 00%)

6. Trading method: Order matching or agreement

7. Estimated time of transaction:

– Start date:  May 12th, 2023

– End date: June 12th, 2023