At close today, Infosys commanded 9.15% weight on the 30-share Sensex, while RIL had 8.72% weight.
Shares of Infosys ended 1.52% higher at Rs 3,323.50 apiece, while RIL was up 0.84% at Rs 870.25.
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Diversified group ITC Ltd continues to have the biggest weight of 10.62% 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 6% 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% for the 2013-14 fiscal.
Among others in the top five, software major TCS's weight stood at 7.34% and private sector lender HDFC Bank's at 7.20%.
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).