At close of trade today, HDFC Bank's market capitalisation (m-cap) stood at Rs 4,31,471.57 crore -- Rs 4,688.27 crore more than RIL's Rs 4,26,783.30 crore.
Shares of HDFC Bank rose by 0.62 per cent to Rs 1,679.65 on BSE, while RIL fell by 0.51 per cent to Rs 1,312.60.
During the day, the scrip of HDFC Bank gained 1.35 per cent to touch its 52-week high of Rs 1,691.90.
TCS is the most valued Indian company with a m-cap of Rs 4,83,424.79 crore, followed by HDFC Bank, RIL, ITC (Rs 3,70,130.76 crore) and HDFC (Rs 2,65,178.80 crore) in the top-five list.