CT3: Change in shareholding of principal shareholder (Mr. Phan Quoc Hieu)

- Name of issuer: Project 3 Construction and Investment Joint Stock Company
- Stock code: CT3
- Securities type: common stock
- Name of principal shareholder: Mr. Phan Quoc Hieu
- Number of shares held by the principal shareholder before transaction: 2,175,573 shares (24.72%)
- Number of shares disposed: 860,000 shares
- Total holding following transaction and total percentage following transaction: 1,315,573 shares (14.95%)
- Purpose of transaction: Personal
- Date of transaction: 24/10/2025