The brothers run Micro Labs, pharma outfit founded in 1973 by their late father Ghewar Chand Surana who started his career as a pharmaceutical distributor in Chennai. The $372 million (revenues) firm, now headquartered in Bangalore, makes generic drugs that it sells domestically and exports to 30 countries. Micro Labs is in the process of seeking USFDA approval to make generic versions of 45 medicines for eye care, pain management, and hypertension. It has invested $33 million in a new factory in Sikkim. The brothers are targeting sales of $1 billion by 2018. It is rumoured that they turned down a lucrative buyout offer from a multinational.