12. Warren Buffett
Known as the "Oracle of Omaha," Warren Buffett is an investment guru and one of the richest and most respected businessmen in the world.
Buffett was born on August 30,1930, in Omaha, Nebraska. Investing by age 11, Buffett was running a small business at 13. Buffett later started the firm Buffett Partnership in Omaha, with huge success. In 2006, Buffett announced that he would give his entire fortune away to charity (est. $62 bil.), the largest act of charitable giving in United States history.
At the age of 84 Warren Buffett is still at the top of his game both professionally and philanthropically. The second-richest American's net worth continues to surge, despite his giving away billions, thanks to the juggernaut performance of Berkshire Hathaway.