The pharma magnate returns to the list after four years riding on a three-fold increase in the shares of generics firm Aurobindo Pharma, which he had co-founded in 1986 with a relative. The company bounced back after the USFDA lifted an import ban it had imposed in 2011 for manufacturing lapses. Aurobindo's sales in the US are now up, and it is also expanding in Europe. In April, it acquired the European operations of Irish pharma firm Actavis.