BTN: Change in shareholding of principal shareholder (Mai The Dung)

- Name of issuer: Binh Dinh Tunnel Brick Joint Stock Company
- Stock code: BTN
- Securities type: common stock
- Name of principal shareholder: Mai The Dung
- Name of related person: Nguyen Thi Thu Ha
- Number of shares held by the principal shareholder before transaction: 314,000 shares (7.14%)
- Number of shares acquired: 305,000 shares
- Total holding following transaction and total percentage following transaction: 619,000 shares (14.08%)
- Number, ownership proportion of shares/ fund certificates currently held by the related person:1,900 shares (0.04%)
- Number, ownership proportion of shares/ fund certificates held by individual/ organization investor together with related persons after the transactions:620,900 shares (14.12%)
- Purpose of transaction: Personal needs
- Date of transaction: 23/09/2025