Full list
Rank Name Age Company
1 Sergey Brin 36 Google
1 Larry Page 36 Google
2 Mark Zuckerberg 25 Facebook
3 James Murdoch 36 News Corp.
4 Aditya Mittal 33 ArcelorMittal
5 Biz Stone 35 Twitter
5 Evan Williams 37 Twitter
6 Tiger Woods 33  
7 Jonathan Gray 39 Blackstone
8 Jason Kilar 38 Hulu
9 John Arnold 35 Centaurus Advisors
10 Marc Andreessen 38 Netscape, Opsware, Ning, Andreessen Horowitz
11 Lorenzo Simonelli 36 GE Transportation
12 Tim Armstrong 38 AOL
13 Cesar Conde 35 Univision Networks
14 Raul Vazquez 38 Walmart.com
15 Kevin Plank 37 Under Armour
16 Jay-Z 39 Translation Advertising
16 Steve Stoute 39 Translation Advertising
17 Meredith Whitney 39 Meredith Whitney Advisory Group
18 "Pony" Ma Huateng 38 Tencent
19 Seth MacFarlane 36 Family Guy
20 Kevin Warsh 39 Board of Governors of the Federal Reserve System
21 Marissa Mayer 34 Google
22 Paul Touradji 38 Touradji Capital
23 Xiaofeng Peng 34 LDK Solar
24 Alex Rigopulos 39 Harmonix Music Systems
24 Eran Egozy 38 Harmonix Music Systems
25 Max Levchin 34 Paypal , Slide
26 Josh James 36 Omniture
27 Tony Hsieh 35 Zappos.com
28 Brian Sack 39 New York Fed
29 Aaron Patzer 28 Mint.com
30 Danny Rimer 39 Index Ventures
31 Premal Shah 34 Kiva.org
31 Matthew Flannery 32 Kiva.org
32 Rio Caraeff 34 Vevo
33 Erin Burnett 33 CNBC
34 Ralph Gilles 39 Dodge, Chrysler
35 Charles Best 34 DonorsChoose.org
36 Gina Bianchini 37 Ning
37 Keith Meister 36 Icahn Capital
38 Wendy Clark 38 Coca-Cola
39 Casey Wasserman 35 Wasserman Media Group
40 Ben Silverman 39 IAC
From the Nov. 9, 2009 issue
Quick Vote
Who's more influential?
  • Google's Sergey Brin and Larry Page
  • Golfer Tiger Woods
  • Financial analyst Meredith Whitney
  • Rapper and entrepreneur Jay-Z
Quiz
Can you pass the '40 under 40' test?
See how much you know about business's hottest rising stars
1. Which member is a fan of Green Day and an avid fencer?
a) Facebook's Mark Zuckerberg
b) Google's Sergey Brin
c) Under Armour's Kevin Plank
d) Roc-A-Fella's Jay Z
Video
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