An unknown buyer acquired 9.5% stake in Construction Joint Stock Company No 9 (HNX:VC9) from Pham Thai Duong on November 11, 2021. An unknown buyer acquired 1.1 million shares. An unknown buyer completed the acquisition of 9.5% stake in Construction Joint Stock Company No 9 (HNX:VC9) from Pham Thai Duong on November 11, 2021.