An unknown buyer acquired 8.13% stake in Higher Educational and Vocational Book Joint Stock Company (HNX:HEV) from Hoang Minh Son on December 15, 2021. Pursuant to the terms, Hoang Minh Son sold 81,300 shares and reduces ownership to 0%. An unknown buyer completed the acquisition of 8.13% stake in Higher Educational and Vocational Book Joint Stock Company (HNX:HEV) from Hoang Minh Son on December 15, 2021.