9.  Warren Buffett, CEO, Berkshire Hathaway: 

Warren Buffet revealed that  the mistakes people  infact don’t see are way bigger. As back in 1988 or so he started out to buy a company named fannie Mae for some reason he did not follow through. He repents that he would have made billions and a half dollors on that but had only made 5 million.  

10. Richard Branson, founder and chairman, Virgin Group: 

Richard Branson admits his mistake by claiming that he has lost most of his money that he has invested on Virgin Cola. But he says that it is considered to be No 1 in Bangaladesh.