1. Bill Gates

• Net Worth: $72 B                                                                       
• Source of Wealth: Microsoft                                                         
• Citizen: United States
• Age:58

William Henry “Bill” Gates III was born on October 28, 1955.He is an American business mogul, depositor, humanitarian, and instigator. Gates is the previous CEO and contemporary chairman of Microsoft, the software company he established with Paul Allen. He is constantly categorized among the world’s wealthiest natives and was the wealthiest overall from 1995 to 2009 excluding 2008, when he was ranked third. He has also published several books. Bill Gates is one of the best known entrepreneurs of the private computer insurgency. In the later stages of his profession, Gates has tracked a number of benevolent endeavors bequeath large amounts of money to various altruistic organizations and systematic delve into agenda through the Bill and Melinda Gates

2. Warren Buffett

•  Net Worth: $53.5 B                                                                       
•  Source of Wealth: Berkshire Hathaway                                       
•  Citizen:  United States
•  Age: 83 

 
Neither age nor prostate cancer slows Warren Buffett down: a year after completing radiation treatment, the world's fourth richest man ($58.5 billion) is still doing huge deals. His Berkshire Hathaway teamed up with 3G Capital to pick up iconic ketchup maker H.J. Heinz for $23.2 billion and a Berkshire subsidiary is buying Nevada's NV Energy for $5.6 billion. He gave away another $2 billion of Berkshire stock to the Gates Foundation in July, bringing his lifetime giving to nearly $20 billion.

3. Larry Ellison

•     Net Worth: $41 B                                                                      
•     Source of Wealth: Oracle                                                            
•     Citizen: United States
•     Age: 69

CEO and co founder of Oracle Cooperation, Larry Ellison with a net worth of $39.5 billion is the fifth richest person in the world. Ellison collects houses on Malibu's Carbon Beach and also owns of 98% of Hawaii's Lanai island. In his quest for youth he has donated $445 million to his medical foundation to support research on aging and age-related diseases.

4. Christy Walton & family

• Net Worth: $25.3 B                                                                 
• Source of Wealth: Wal-Mart, inherited
• Citizen: United States
• Age: 58

Christy Walton is the richest woman in the world. She inherited her wealth when husband John Walton, a former Green Beret and Vietnam war medic, died in an airplane crash in 2005. John's side investment in First Solar had boosted Christy's net worth well above the rest of her family, but the stock sank in 2012, narrowing her lead. In recent months, First Solar stock has revived, up 60% since last August and boosting her net worth by $380 million. The bulk of her holdings are in Wal-Mart, the massive retailer founded by her father-in-law Sam Walton and his brother James in 1962. Christy has received nearly $350 million in Wal-Mart dividends after taxes in 2013.

5. Charles Koch

• Net Worth: $25 B                                                                 
• Source of Wealth: diversified, inherited and growing
• Citizen: United States
• Age: 78

An alumnus of Massachusetts Institute of technology, he is the fifth richest man along with his brother David in America. He owns a forty-two percent stake in Koch industries. He is at position #41 in the list of most powerful people in the world by Forbes. Along with his brother, he forms one of the richest billionaires family.

6. David Koch

• Net Worth: $25 B                                                                 
• Source of Wealth: diversified, inherited and growing
• Citizen: United States
• Age: 73

Along with his brother Charles, he occupies the fifth spot. His net worth stands at Twenty Five billion dollars and this makes him the twelfth richest person in the world along with his brother. Like his brother, he too studied at Massachusetts Institute of technology. Now, he is the executive  Vice President of Koch Industries.

7. Sheldon Adelson

• Net Worth: $24.9 B                                                                 
• Source of Wealth: Casinos
• Citizen: United States
• Age: 80

Gambling mogul Sheldon Adelson continues to hit the jackpot. Booming business at his casinos in Macau and Singapore lifted the fortune of the Las Vegas Sands chief $8 billion over the past year as shares climbed 35%. In August the Sands settled a money laundering investigation by agreeing to return $47 million in deposits made by a high-stakes player that Sands failed to report to U.S. government. Adelson built the $1.5 billion Venetian Resort in 1997 and the $1.9 billion Palazzo resort in 2008.

8. Jim Walton

• Net Worth: $23.7 B                                                                 
• Source of Wealth: Wal-Mart, inherited
• Citizen: United States
• Age: 65

Jim is the youngest son of retail visionary Sam (d. 1992), who founded the massive retailer with his brother James, opening a single store in Rogers, Ark. in 1962. Wal-Mart -- which is up 5% from last year -- now has sales of nearly $470 billion and employs 2.2 million people in 11,000 stores worldwide. Jim has received more than $350 million in dividends after taxes in 2013. He is also the CEO of the Walton family's Arvest Bank, which has branches in Arkansas, Kansas, Oklahoma and Missouri. The bank is worth about $1.8 billion, with net profits of nearly $100 million in 2012.

9. Alice Walton

• Net Worth: 23.3 B                                                                 
• Source of Wealth: Wal-Mart, inherited
• Citizen: United States
• Age: 64

She is sister of Jim and Samuel and one of the most powerful women in the world. She has a net worth of $23.3 billion according to Forbes and is the second richest woman in America.

10. Samuel Robson Walton

• Net Worth: $23.1 B                                                                 
• Source of Wealth: Wal-Mart
• Citizen: United States
• Age: 69

 
It hasn't been all smiles this past year for Wal-Mart heir S. Robson Walton, eldest son of visionary retailer Sam. Wal-Mart boasts sales of nearly $470 billion and employs nearly 2.2 million people in 11,000 stores worldwide. Rob has received about $350 million in dividends in 2013. Before joining Wal-Mart, he was a partner with the law firm of Conner & Winters in Tulsa, Oklahoma. Rob and his siblings have donated about $2 billion to the Walton Family Foundation over the last five years.