Micky Jagtiani
Net worth: $2.5 billion

Jagtiani flunked out of accounting school in London and took up driving taxis and cleaning hotel rooms to pay the bills and support a bottle of whiskey a day habit. He then lost his entire family to illness in the span of one year.

Just 21 and alone in Bahrain with $6,000 of his and his family├ó€™s savings, he took over the retail space his brother had leased before dying of cancer and started selling baby products. Chain is now one of the most profitable retail groups in the Middle East.

Thirty years after he landed up in Bahrain the Dubai-based CEO of Landmark group has built himself one the largest and most profitable retail chains in the Middle East, with more than 280 stores, 6,000 employees and an estimated $650 million in revenues