At close today, Infosys commanded 9.15 per cent weight on the 30-share Sensex, while RIL had 8.72 per cent weight.
Shares of Infosys ended 1.52 per cent higher at Rs 3,323.50 apiece, while RIL was up 0.84 per cent at Rs 870.25.
Diversified group ITC Ltd continues to have the biggest weight of 10.62 per cent on the Sensex.
Weight of a stock is measured by the value of a company's free-float or non-promoter shares that can be freely traded in the market.
Infosys counter rallied by more than six per cent in the past three trading sessions. The stock had touched its 52-week high of Rs 3,360 on October 11 after the IT giant had posted strong quarterly earning and also revised its US dollar revenue guidance upwards to 9-10 per cent for the 2013-14 fiscal.
Among others in the top five, software major TCS's weight stood at 7.34 per cent and private sector lender HDFC Bank's at 7.20 per cent.
In terms of market capitalisation, TCS is the most valued company with a valuation of Rs 4,33,455 crore, followed by RIL (Rs 2,81,146 crore), ITC (Rs 2,68,883 crore), ONGC (Rs 2,35,575 crore) and Infosys (Rs 1,90,847 crore).
Reliance profit up 1.5%, turnover tops Rs 1 lakh crore
A week of anticipation for investors
Trendy, light-weight PET bottles to take wine to mass market
TCS shares up 4% ahead of Q2 results tomorrow
RIL's wait for higher gas price to get longer