STH: Change in shareholding of principal shareholder (Pearson Gateway Company Limited)

- Name of issuer: Thai Nguyen Book Publishing Joint Stock Company
- Stock code: STH
- Securities type: common stock
- Name of principal shareholder: Pearson Gateway Company Limited
- Number of shares held by the principal shareholder before transaction: 2,410,000 shares (12.36%)
- Number of shares acquired: 2,445,000 shares
- Total holding following transaction and total percentage following transaction: 4,855,000 shares (24.9%)
- Purpose of transaction: Portfolio structure
- Date of transaction: 17/06/2025