1. Mark Zuckerberg, 30 – Facebook ($33.4bn)

2. Dustin Moskovitz, 30 – Facebook ($7.9bn) 

3. Elizabeth Holmes, 31 – blood-testing ($4.5bn) 

4. Tom Persson, 30 – H&M ($3bn)

5. Julio Mario Santo Domingo, III, 29 – beer ($2.2bn) 

6. Tatiana Casiraghi, 31 – beer ($2.2bn)  

7. Nathan Blecharczyk, 31 – Airbnb ($1.9bn) 

8. Anton Kathrein Jr, 30 – antennas ($1.7bn) 

9. Evan Spiegel, 24 – Snapchat ($1.5bn)

10. Bobby Murphy, 25 – Snapchat ($1.5bn

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