DS3: Result of transaction of principal shareholder (Nguyen Van Thuong)

- Name of issuer: DS3 Joint Stock Company
- Stock code: DS3
- Securities type: common stock
- Name of principal shareholder: Nguyen Van Thuong
- Number of shares held by the principal shareholder before transaction: 1,036,700 shares (9.72%)
- Number of shares acquired: 209,700 shares
- Total holding following transactions and total percentage following transactions: 1,246,400 shares (11.68%)
- Purpose of transaction: buy shares
- Date of transaction: 08/09/2025