The race for Corus could get tougher for the Tatas. The latest shareholding in Corus shows advisors, bankers and brokers of rival bidder CSN hold nearly 20% in Corus, reports CNBC-TV18.

UBS, a broker to CSN, holds 7.36% and bankers and advisors Barclays and Goldman Sachs hold over 4% each. Along with CSN's own 3.8% stake, the total amounts to nearly 20%. Goldman Sachs' holding has risen from 3% on November 8 to 4% on November 20. The single largest shareholder, Standard Life, has 7.8% and it has already indicated it is not in favour of Tata's price for Corus.

Lehman Brothers, the legal and general investments and capital group hold nearly 10% and they are independent stakeholders. This is the stated position, but it isn't known whether these stakeholders are acting on behalf of the bidders.