At the end of today's trade, the market-capitalisation (m-cap) of TCS soared to Rs 5,09,523.91 crore, the highest for the company since its listing in 2004.
Shares of the outsourcing giant ended the day at Rs 2,601.30, up 2.45% on the BSE. In intra-day trade, it rose by 2.9% to Rs 2,612.95.
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In dollar terms, TCS' market valuation rose to $84 billion.
TCS, the first Indian company to achieve the feat, had earlier crossed Rs 5 lakh crore market-cap in July this year.
The IT bellwether is also currently the country's most valued company in terms of market valuation.
TCS is followed by state-run ONGC whose m-cap stood at Rs 3,74,730.47 crore, Reliance Industries (Rs 3,33,400.02 crore), ITC (Rs 2,78,020.71 crore) and Coal India (Rs 2,37,495.30 crore).
The market valuation of other big IT players such as Infosys stood at Rs 2,14,454.24 crore, Wipro (Rs 1,42,478.12 crore), HCL Technologies (Rs 1,16,142.59 crore) and Tech Mahindra (Rs 57,293.10 crore).