DSH: Result of transactions of share purchase rights of Directors, PDMR (Mr. Dau Hieu Thang)

- Name of issuer: Dong Son Infrastructure Investment Joint Stock Company
- Stock code: DSH
- Name of person discharging managerial responsibility/Director: Mr. Dau Hieu Thang
- Position in the listed company: Deputy General Manager
- Number of shares held by the shareholder before transaction: 150,000 shares
- Number of share purchase rights held by the shareholder: 150,000 rights
- Nature of transaction: sale/acquisition of share purchase rights
- Number of rights disposed: 150,000 rights
- Total holding of share purchase rights following transaction: 0 rights
- Number of shares to be acquired corresponding to the holding of share purchase rights after transaction: 150,000 shares
- Start date of transaction: 11/11/2025
- End date of transaction: 12/11/2025