5) Mohammed bin Rashid Al Maktoum, Emir of Dubai – $4 Billion

Mohammed bin Al Maktoum is the Emir of Dubai and the prime minister and vice president of UAE. His family’s total wealth is estimated to be around $44 billion. He owns 99.67 percent of Dubai Holding. He is the brain behind Dubai’s landmarks like Burj Al Arab, Palm Islands and Burj Al Khalifa.