TST: Notice of transaction of Directors, PDMR (Trang Thanh Vu)

- Name of issuer: Telecommunication Technical Service Joint Stock Company
- Stock code: TST
- Name of person discharging managerial responsibility /Director: Trang Thanh Vu
- Position in the listed company: Chief of the Supervisory Board
- Number of shares held by the shareholder before transaction: 18,000 shares (0.38%)
- Nature of transaction: order matching & negotiation
- Number of shares to be disposed: 18,000 shares
- Reason for transaction: Personal finance
- Expected Start date of transaction: 29/08/2025
- Expected End date of transaction: 26/09/2025