Lakshmi Mittal

London's richest resident oversees ArcelorMittal, world's largest steelmaker. Net profits fell 75% in 2009. Mittal took 12% pay cut amid slump but improved outlook pushed stock up a third in past year. Looking to expand in his native India; wants to build steel mills in Jharkhad and Orissa but has not received government approval. Started in family steel business in India in 1970s; branched out on his own in 1994. Initially bought up steel mills on the cheap in Eastern Europe. Earned $1.1 billion for selling his interest in a Kazakh refinery in December. Sits on the boards of Goldman Sachs, EADS. Upped stake in struggling British soccer team QPR in February. Funding 400-foot sculpture to be built in London's Olympic Park in time for 2012 Olympics. Owns 12-bedroom mansion in London's posh Kensington neighborhood. Daughter-in-law Megha recently bought insolvent German fashion house Escada.