In the 32nd annual Forbes list of the world's billionaires, the aggregate wealth of the top 20 richest people on Earth amounts to about 13 percent of all billionaires' fortunes combined.[2] A record of 2,208 billionaires were in the ranking and the total wealth was $9.1 trillion, up 18% since 2017. For the first time, Jeff Bezos was listed as the top billionaire due to Amazon's rising stock price that resulted in one person's biggest one year gain in wealth ($35 billion) since Forbes started tracking in 1987.[2] The U.S. continued to have the most billionaires in the world, with a record of 585, while China is catching up with 476 (when including Hong Kong, Macau and Taiwan).[2]
| No. | Name | Net worth (USD)
(March 2018)[15]
| Age | Nationality | Source(s) of wealth |
|---|---|---|---|---|---|
1  | Jeff Bezos | $112 billion | 54 |  United States | Amazon |
2  | Bill Gates | $90 billion | 63 | United States | Microsoft |
| 3 | Warren Buffett | $84 billion | 87 | United States | Berkshire Hathaway |
| 4 | Bernard Arnault | $72 billion | 69 |  France | LVMH |
5  | Mark Zuckerberg | $71 billion | 33 | United States | |
| 6 | Amancio Ortega | $70 billion | 81 |  Spain | Inditex, Zara |
| 7 | Carlos Slim | $67.1 billion | 78 |  Mexico | América Móvil, Grupo Carso |
| 8 | Charles Koch | $60 billion | 82 | United States | Koch Industries |
| 8 | David Koch | $60 billion | 77 | United States | Koch Industries |
| 10 | Larry Ellison | $58.5 billion | 73 | United States | Oracle Corporation |