1. Name of individual performing the transaction:

Mr. Dang Tat Thanh – Internal shareholder – Position: Director

2. Trading stock code: S55

3. Number of shares held before the transaction: 365,300 shares (equivalent to 3.65%)

4. Number of shares registered to buy: 154,800 shares, equivalent to 1.55%

5. Number of shares held after the transaction: 520,100 shares (equivalent to 5.20%)

6. Trading method: Order matching and negotiation

7. Expected transaction time: April 3, 2026 – April 29, 2026