In 1996,Autry Stephens struck out on his own to pursue riches in the oil industry via his broad Dog Drilling Co. He had just one rig. Now, 22 years later, or he owns the largest closely-held oil producer by production volume in Texas,with a valuation of $15 billion. Read more: From Oil Wildcatter To Reality TV Star To Potential Billionaire
Source: celebritynetworth.com