Hai also seeks to invest in his own company by the purchase, set to occur from June 23 to July 22, he told the Ho Chi Minh Stock Exchange (HoSE) in a filing.
If successful, Hai would increase his ownership in Hoa Binh from 15.84 percent to 19.91 percent.
HBC fell to the lowest since October last year on Monday when it recorded its seventh losing session in a row.
It has lost over 50 percent since the beginning of the year.
The stock recorded Tuesday with a 6.8 percent rise.
Hoa Binh targets a revenue growth of 54 percent to VND17.5 trillion ($744.68 million) this year, while it eyes to bring profit up 261 percent to VND350 billion.