British American Tobacco p.l.c. (LSE:BATS) (BAT), the largest shareholder in India's ITC Limited (NSEI:ITC), is working with Wall Street banks Citigroup Inc. (NYSE:C) and Bank of America Corporation (NYSE:BAC) to help pare some of that stake and raise up to INR 210 billion ($2.5 billion), according to people with knowledge of the matter. This would translate to monetizing 3.5%-4% in ITC. However, no transaction will happen until the Reserve Bank of India (RBI) approves the move.