Rank 8

 Education: Dropout, Stanford University; BA/BS, University of Bombay Fortune: $27 billion (down $2 billion) Recent Headlines: Recent partnership with BP worth $7.2 billion, which is being touted as the biggest foreign investment in India and will see a marketing joint venture; $3.3-billion investment in three American energy firms; much-hyped inauguration of a 27-story personal mansion in the heart of Mumbai