3 of 7
Joe Baratta
Joe Baratta
Senior managing director, private equity group
Age: 39

When he was just 29 years old, Baratta worked with David Blitzer, (then 31 years old) to launch Blackstone's European arm in 2001. By 2006 they had invested more than $3 billion in 13 transactions. He has long been willing to defend his investment theses before skeptical elders, including an idea to take a controlling stake in a small amusement park company called Merlin for $60 million. Schwarzman was skeptical, but now he cites Merlin as a fantastic deal that made the firm more than three times its money and laid the groundwork for several similar acquisitions. Blackstone is now one of the largest theme park operators in the world, a portfolio that includes Madame Tussauds, Sea World, Legoland, and a host of water parks in Europe.

NEXT: Christopher Heady
Last updated October 15 2010: 2:41 PM ET
Full List: Top 40 Meet this year's class of youthful movers and shakers. They're innovating, they're expanding, and they're not really thinking about the recession. More
40 under 40 cut looseWhere can you find these ambitious ones when they are not in the spotlight? Photographer Jeff Minton captured a selection of this year's 40 under 40 in their natural habitats. More
Where is the economy heading? This year's innovators offer their economic predictions for the next few years and beyond. More
Market indexes are shown in real time, except for the DJIA, which is delayed by two minutes. All times are ET. Disclaimer LIBOR Warning: Neither BBA Enterprises Limited, nor the BBA LIBOR Contributor Banks, nor Reuters, can be held liable for any irregularity or inaccuracy of BBA LIBOR. 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.