CET: New principal shareholder - Tran Thi Thu

Tran Thi Thu has become a principal shareholder of HTC Holding Joint Stock Company with information as follows:
- Name of stock held: CET
- Number of shares held by principal shareholder before transaction: 231,300 shares (3.82%)
- Number of shares acquired: 81,100 shares
- Total holding following transaction and total percentage holding following transaction: 312,400 shares (5.16%)
- Date of transaction: 10/04/2025