42 Stephen Schwarzman, Blackstone
Chairman and chief executive Stephen Schwarzman saw the fruits of one of Blackstone's 2013 investments in shipping this year as it sold shares of Hafnia Tankers to BW Group. Merger discussions between Hafnia and BW announced weeks later may result in one of the world's largest product tanker owners
Co-founder oversees a firm of nearly 2,500 employees in 23 offices worldwide, with $457bn in assets under management