Following the completion of a 2 million share purchase in Vietnam Pharmaceutical Materials and Food Joint Stock Company (HNX: VHE) at an average price of 4,888 VND per share, Chairman Bùi Tiến Vinh has increased his ownership stake to over 13%. Currently, VHE shares are trading around 5,000 VND, marking a 56% increase over the past year, yet still significantly below their historical peak of nearly 26,000 VND per share.