India's richest person and Reliance Industries Chairman Mukesh Ambani currently has a net worth of $89.9 billion, which is nearly equal to that of Russia's four richest billionaires combined. Russia's richest man Vladimir Potanin has a net worth of $25.2 billion, as per Bloomberg, while Severstal's ex-CEO Alexey Mordashov and Novatek Founder Leonid Mikhelson's fortunes stand at $22 billion each.