TOS: Notice of transaction of connected person (Le Thi An)

- Name of issuer: Tan Cang Offshore Services Joint Stock Company
- Stock code: TOS
- Securities type: Common stock
- Name of connected person: Le Thi An
- Name of person discharging managerial responsibility (PDMR)/Director: Nguyen Son
- Position in the listed company: Member of the Board of Directors
- Number of shares held by person discharging managerial responsibility (PDMR)/Director: 283,413 shares (0.91%)
- Relation between connected person and PDMR/Director: Mother
- Number of shares held by connected person/institution before transaction: 1,086,425 shares (3.5%)
- Number of shares to be disposed: 500,000 shares
- Nature of transaction: Order matching & negotiation
- Purpose of transaction: Investment portfolio structure
- Expected Start date of transaction: 12/08/2025
- Expected End date of transaction: 09/09/2025