10. In tenth place is the man behind the super successful supermarket chain, Aldi. He currently has an estimated $23.5 bn




6. Entrepreneur Lawrence Ellison is the first of three Americans in this years list. His $28 bn has been made from Oracle Cooperation, a major enterprise software company of which he is the founder and the CEO.
5. Lakshmi Mittal is the UK's wealthiest man. Born in Rajistan he now resides in London. He has super savings of $28.7 bn. made from his company Arcelormittal which is the largest steel maker in the world.
4. Indian business tycoon Mukesh Ambani is this year's fourth place with $29 bn. His company Reliance Industries is India's most valuable company. He is also the owner of Mumbai's cricket club.



The billionaire's family empire controls more than 200 companies, covering the banking, telecoms and construction sectors to name but a few.
Back in the 1990s, he moved quickly to take advantage of the privatization of Mexico's national telephone company - and has never looked back.
According to Forbes, he has donated $65 million to fund a research project in genomic medicine with American billionaire philanthropist Eli Broad.
Carlos Slim Helu