Sami Mnaymneh

Back in 1993, Sami Mnaymneh cofounded H.I.G. Capital, which is headquartered in Miami. The private equity firm manages $45 billion and maintains offices in multiple cities in the U.S., Europe, and South America. Prior to H.I.G., Mnaymneh was managing director at Blackstone and vice president of mergers and acquisitions at Morgan Stanley. He appears to keep a low profile and little is known about the 61-year-old's personal life. Something of a wunderkind, he graduated first in his class at Columbia University in 1981 and later earned an MBA and a law degree from Harvard. Public records indicate that Mnaymneh resides in South Beach. He's ranked as the country's 240th-richest billionaire.