7. David Koch (Worth: 42.9 Billion)
New York City’s wealthiest resident, David Koch, worked for his family company Koch Industries alongside his brother Charles Koch.
Together, they helped grow the business to new heights; their companies are among the leaders in the petroleum, chemicals, minerals, and energy fields.
His net worth is said to be roughly equivalent to that of his brother, who is next on this list.
6. Charles Koch (Worth: 42.9 Billion)
The brother of David Koch, Charles Koch also founded his massive wealth through his family’s company, Koch Industries.
Additionally, Charles Koch is an active investor in a number of free market-oriented educational companies, as well as an outspoken entrepreneur who is against government provided corporate welfare.
5. Larry Ellison (Worth: 54.3 Billion)
Ellison founded, along with Bob Miner and Ed Oates, Oracle Corporation, which is the second largest software maker in the entire world after Microsoft.
In 2008, Ellison was rated by the Associated Press as the highest paid CEO in the entire world.
4. Amancio Ortega (Worth: 64.5 Billion)
Ortega was the founding chairman of a fashion group that is most famously known for heading Zara, a high-end line of clothing and accessories shops.
Famously one of the quietest billionaires of all time, Ortega has granted only three interviews in his entire career to journalists.
Based in Spain, Ortega’s company Zara saw 10 billion euros in revenue in 2014.
3. Warren Buffett (Worth: 72.7 Billion)
The most successful investor of all time along with the number 2 person on this list, Warren Buffett’s fortune came from his company Berkshire Hathaway, which is essentially an organization that owns in whole or in part many of the world’s most famous companies, including Dairy Queen, Fruit of the Loom, Heinz, Coca-Cola, Wells Fargo, and more.
Kudos to Buffett, however – he has pledged to give away the majority of his fortune to philanthropic activities and organizations.