Ross Perot is the richest former U.S. presidential candidate with a fortune of $4.3 billion, 10 times more than publishing tycoon Steve Forbes and about three times the wealth of the top 10 list combined, according to research firm Wealth-X.

Hillary Clinton, who ran for the Democratic nomination in 2008, has a net worth of $100 million, putting her in the sixth spot along with her husband, former President Bill Clinton. U.S. Secretary of State John Kerry, who unsuccessfully ran against former President George W. Bush in 2004, came in third with $280 million. Bush, meanwhile, didn't make the top 10 list.

The complete list consists of five Democrats, four Republicans and one independent:

  1. Ross Perot            $4.3  billion           Independent                 
  2. Steve Forbes         $430 million          Republican
  3. John Kerry             $280 million          Democrat
  4. Mitt Romney          $220 million          Republican
  5. Al Gore                  $190 million          Democrat
  6. Bill Clinton             $100 million          Democrat
  7. Hillary Clinton        $100 million          Democrat
  8. Rudy Giuliani         $  80  million         Republican
  9. John Edwards        $  50  million         Democrat
  10. Jon Huntsman        $ 30  million          Republican