1. Bill Gates, 61. Microsoft co-founder. $89 billion – up $9 billion
2. Jeff Bezos, 53. Amazon founder and CEO. $81.5 billion
3. Warren Buffett, 87. Berkshire Hathaway CEO. $78 billion
4. Mark Zuckerberg, 33. Facebook co-founder and CEO. $71 billion
5. Larry Ellison, 73. Oracle co-founder and chairman. $59 billion
6 (joint wealth). Charles Koch, 81. Koch Industries chairman and CEO. David Koch, 77. Koch Industries exeuctive vice-president. $48.5 billion
8. Michael Bloomberg, 75. Bloomberg founder and CEO. $48.8 billion
9. Larry Page, 44. Google co-founder and CEO. $44.6 billion
10. Sergey Brin, 44. Google co-founder and president. $43.4 billion
Wealthiest women
13. Alice Walton, 68. Crystal Bridges Museum of American Art chairman, and daughter of WalMart founder Sam Walton. $38.2 billion
16. Jacqueline Mars, 78. Owns one-third of candy giant Mars. $25.5 billion
24. Laurene Powell Jobs, 53. Emerson Collective president, widow of Apple co-founder Steve Jobs. $19.4 billion
Youngest billionaires (ranked by age)…
248. Evan Spiegel, 27. Snapchat co-founder and CEO. Bobby Murphy, 29. Snapchat CEO. $3.1 billion
33. Lucas Walton, 31. WalMart founder Sam Walton’s grandson. $13.2 billion
206. Rishi Shah, 31. Outcome Health co-founder and CEO. $3.6 billion
340. Julio Mario Santo Domingo III, 32. SABMiller stakeholder’s grandson. $2.4 billion
… and the oldest billionaires (ranked by age)
340. Alexander Spanos, 94. San Diego Chargers owner. $2.4 billion.
288. David Murdock, 94. Dole Food Products chairman. $2.8 billion B 94 Ventura, CA Dole, real estate
115. Sumner Redstone, 94. Viacom chairman. $5.1 billion