Reliance Industries shares rose for third straight session on Thursday to hit record high of Rs 2,776 on the BSE, data from stock exchange showed. The run-up in Mukesh Ambani-led company has led to its market capitalisation touch an all-time high of Rs 18.78 lakh crore, according to BSE. In the last three sessions the stock has jumped 9 per cent and has led the recovery in Sensex which was under pressure due to heavy selling by foreign institutional investors.