The Tata group, though now on a hunt for a successor, is now the richest business unit outweighing even the Ambani's which are now thus the second (RIL owned by Mukesh Ambani) and the fourth (ADAG led by Anil Ambani) highest prized industry.

Anil Agarwal run Sterlite group is at the third position with Sunil Mittal at the fifth position with his Bharti group.

But if the market capitalization of the Ambani siblings owned firms are taken collectively then they will outweigh the Tata group with the value of the Tata group being around Rs 3, 71,000 crore and that of the Ambani brothers together being Rs 4,47,000. Individually RIL has been valued to be of RS 3, 21,750crore and Anil Ambani's group is of ` 1, 25,000 crore worth.

At the end of the previous quarter Mukesh Ambani's firm, with a market cap of Rs 3,58,000, occupied the first position with the Tata group following it at the second position with ` 3,26,000 crores.

Anil Ambani's ADAG could make it only to the third position following his brother and the Tata group at the close of the earlier quarter.