Boral chief executive Vik Bansal is the chairman of ASX-listed biogas group LGI, which has managed to thump the returns of the now Seven-owned concrete business where he made his name as a turnaround specialist.

Mr Bansal has been heading the board of LGI for two years, and investors who bought in at the float are up about 85 per cent on the issue price of $1.50. The stock closed at $2.80 on Friday giving it a market value of $230 million.