Bluestone Founder Gaurav Singh Kushwaha is set to earn 980% returns worth about ₹1,150 crore via the loss-making firm's IPO, valuing his stake at ₹1,264 crore at the upper end of the IPO's price band, Moneycontrol reported. Investor Saama Capital may earn 961% returns, while Kalaari Capital Partners and Accel India are likely to earn 735% and 712% returns respectively.