11. Sergey Brin
Sergey Brin
Co-founder, Google
Age: 38
Industry: Technology

After sharing responsibility for Google's day-to-day operations for 10 years, Brin and Larry Page are officially decoupled -- on this list and at the Googleplex. With Page running the show, Google's other golden boy now devotes his time to special projects, many of them in stealth mode.

Cutting loose: Billionaire Brin is apparently having some fun too. His Google page shows newly uploaded photos of himself skydiving and scuba diving in Egypt's Red Sea. He has also invested $5 million in a Virginia-based space tourism company and is waiting for his private ride into space.


Last updated October 25 2011: 5:11 PM ET
Join the Conversation
Ones to watch

In addition to Fortune's 40 Under 40 list, we're also keeping our eye on these 20 innovators, young guns from a wide range of industries and backgrounds.

Video
Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer Morningstar: © 2014 Morningstar, Inc. All Rights Reserved. Disclaimer The Dow Jones IndexesSM are proprietary to and distributed by Dow Jones & Company, Inc. and have been licensed for use. All content of the Dow Jones IndexesSM © 2014 is proprietary to Dow Jones & Company, Inc. Chicago Mercantile Association. The market data is the property of Chicago Mercantile Exchange Inc. and its licensors. All rights reserved. FactSet Research Systems Inc. 2014. All rights reserved. Most stock quote data provided by BATS.