1. Full name: HOANG HUYEN TRANG

2. Stock code owned: S55

3. Number of shares held before trading:  516,700 shares (equivalent to 5.17%)

4. Number of shares sold:  301,900 shares (3.02% respectively)

5. Number of shares held after trading: 214,800 shares (2.15%)

7. Transaction time: April 20th, 2023

So, Since April 20th, 2023, Ms. Hoang Huyen Trang is no longer a major shareholder of Song Da 505 Joint Stock Company – Stock code S55.