13. Bill Gates: $11 million per day
2017 net worth: $86 billion
2018 net worth: $90 billion
Total increase: $4 billion
12. Larry Ellison: $17.3 million per day
2017 net worth: $52.2 billion
2018 net worth: $58.5 billion
Total increase: $6.3 billion
11. Jim Walton: $21.9 million per day
2017 net worth: $38.4 billion
2018 net worth: $46.4 billion
Total increase: $8 billion
10. Larry Page: $22.2 million per day
2017 net worth: $40.7 billion
2018 net worth: $48.8 billion
Total increase: $8.1 billion
9. Steve Ballmer: $23 million per day
2017 net worth: $30 billion
2018 net worth: $38.4 billion
Total increase: $8.4 billion
8. Warren Buffett: $23 million per day
2017 net worth: $75.6 billion
2018 net worth: $84 billion
Total increase: $8.4 billion
7. Jack Ma: $29.3 million per day
2017 net worth: $28.3 billion
2018 net worth: $39 billion
Total increase: $10.7 billion
5. & 6. Charles and David Koch: $32.1 million per day
2017 net worth: $48.3 billion
2018 net worth: $60 billion
Total increase: $11.7 billion
4. Carlos Slim: $34.8 million per day
2017 net worth: $54.4 billion
2018 net worth: $67.1 billion
Total increase: $12.7 billion
3. Mark Zuckerberg: $41.1 million
2017 net worth: $56 billion
2018 net worth: $71 billion
Total increase: $15 billion
2. Bernard Arnault: $83.6 million per day
2017 net worth: $41.5 billion
2018 net worth: $72 billion
Total increase: $30.5 billion
1. Jeff Bezos: $107.4 million per day
2017 net worth: $72.8 billion
2018 net worth: $112 billion
Total increase: $39.2 billion