PGN: Change in shareholding of principal shareholder (Huynh Van Quang)

- Name of issuer: Plastic Additives Joint Stock Company
- Stock code: PGN
- Securities type: common stock
- Name of principal shareholder: Huynh Van Quang
- Number of shares held by the principal shareholder before transaction: 506,600 shares (5.35%)
- Number of shares acquired: 472,910 shares
- Total holding following transaction and total percentage following transaction: 979,510 shares (10.35%)
- Purpose of transaction: Increase shareholding
- Date of transaction: 22/10/2025