TEL: Change in shareholding of principal shareholder (Nguyen Duy Nguyen)

- Name of issuer: Telecommunication Project Construction Development Joint Stock Company
- Stock code: TEL
- Securities type: common stock
- Name of principal shareholder: Nguyen Duy Nguyen
- Number of shares held by the principal shareholder before transaction: 468,392 shares (9.37%)
- Number of shares acquired: 540,018 shares
- Total holding following transaction and total percentage following transaction: 1,008,410 shares (20.17%)
- Purpose of transaction: Investment
- Date of transaction: 18/09/2025