Tatas may lead the tally of Indian corporates in terms of market capitalisation to become the biggest wealth creator, ahead of Oil and Natural Gas Corporation and Reliance on the back of the maiden IPO of the group's closely held company TCS, whose Rs 1 share may fetch over Rs 1,000 each.

With the issue size being estimated around Rs 6,000 crore (Rs 60 billion) for the sale of over 60 million shares, TCS could become a company of over Rs 50,000 crore (Rs 500 billion) in market capitalisation.

As a result, the market cap of Tata Group companies could surge from about Rs 46,000 crore (Rs 460 billion) to around Rs 100,000 crore (Rs 1,000 billion) after listing of TCS shares, market analysts said.

Going by the current share prices, ONGC's market capitalisation is about Rs 93,000 crore (Rs 930 billion), while Reliance Industries and Reliance Energy (erstwhile BSES) have a combined market cap of over Rs 73,000 crore (Rs 730 billion).