20 rising stars under 40

Google co-founder and CEO Larry Page — Justin Sullivan/Getty Images

The 39-year-old co-founder and CEO of Google (GOOG), Larry Page tops Fortune magazine's 40 under 40 list. He and Sergey Brin, who met as Stanford University Ph.D. students in 1996, turned a computer science project into the world's most powerful search tool. The original Google engine remains available on Stanford's website, along with instructions by Brin and Page on "how to build a practical large-scale system" and "effectively deal with uncontrolled hypertext collections where anyone can publish anything they want."

Mark Zuckerberg

The creator of Facebook (FB) took Bill Gates' route: He dropped out of Harvard University and became a billionaire. In this photo, Mark Zuckerberg is projected wearing his trademark hoodie on an electronic screen in Times Square, New York, on May 18 during Facebook's initial public offering on the Nasdaq stock market. The social networking website went public four days after its co-founder and CEO turned 28. Fortune's 40 under 40 last year had Zuckerberg at No. 1.

Marissa Mayer

The 37-year-old Marissa Mayer announced on July 16 that she had left Google (GOOG), joined Yahoo! (YHOO) and gotten pregnant. She reportedly told Google that she'd taken a top job elsewhere in Silicon Valley about 30 minutes before Yahoo! publicly named her as its new CEO. Google employee No. 20 delivered another shocker hours later, when she shared the news on Twitter that she and her husband were expecting a baby.

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Sergey Brin

A 39-year-old co-founder of Google (GOOG), Sergey Brin, rose seven spots from No. 11 last year on Fortune magazine's 40 under 40. As a director of special projects, he runs Google's secret laboratory. In this image on June 27, Brin is seen wearing augmented-reality sunglasses, a Google prototype.

Jack Dorsey

After Twitter co-founder and self-made billionaire Jack Dorsey turned a tech startup into a global business, he set out to do it again. The 35-year-old web developer in 2010 launched Square, a capital-heavy startup that provides electronic payment services to more than 2 million customers.

Greg Jensen

Bridgewater Associates - One Glendinning Place, Westport CT — RufusNunus/Wikipedia (image), Jason Henry McCormick/CBS (copy)

Greg Jensen co-heads Bridgewater Associates, the world's biggest hedge fund. As one of the investment firm's three CEOs, the 37-year-old Jensen oversees operations at the firm's headquarters in Westport, Conn., where employees of the famously secretive Bridgewater 1,200 employees work in seclusion and where management has banned gossiping. The firm manages $130 billion.

Brian Deese

National Economic Council deputy director Brian Deese, who blogs about the U.S. economy on WhiteHouse.gov, helps coordinate the White House's economic priorities, ranging from financial regulation and energy to housing and tax policy. Ten years ago, he also co-wrote "Delivering on Debt Relief: From IMF Gold to a New Aid Architecture" with experts from the Center for Global Development and the Institute for International Economics. He's 31.

Rob Goldstein

The New York headquarters of investment management firm BlackRock — AP (image), Jason Henry McCormick/CBS (copy)

Rob Goldstein runs BlackRock's (BLK) institutional business -- all $2.2 trillion of it. He's also in charge of BlackRock Solutions, the firm's analytics and advisory division which he officially took over in 2009, the year BlackRock bought Barclays Global Investors. Though Fortune magazine profiles Goldstein as a young star who maintains a low profile, his future looks bright. He's 38, slightly geeky and is a senior managing director of the world's largest asset management firm.

Dolf van den Brink

Dolf van den Brink, the 38-year-old president and CEO of Heineken USA, overseas international imports of big beers including Foster's, Tecate and Heineken. The Dutchman, whose past roles with Heineken include unit controller and commercial management trainee, took the top job in 2009 after serving four years as the commercial director and deputy general manager of Bralima, a brewing company owned by Heineken N.V. (HINKY) in the Democratic Republic of Congo.

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David Rhodes

CBS (CBS) News in February 2011 named David Rhodes president. The 38-year-old New York City native directs network newsgathering for all CBS News platforms including television, CBSNews.com and CBS News Radio.

Cesar Conde

The 38-year-old president of Univision Network this year makes his first appearance in the top 10 of Fortune magazine's 40 under 40. Conde, a Harvard University alumnus, in 2009 took over as head of the New York-based company's Spanish-language network.

Charles "Chase" Coleman III

A Sumantran tiger cub — Mark Kolbe/Getty Images (image), Jason Henry McCormick/CBS (copy)

Chase Coleman is a Tiger cub. The 37-year-old managing member of Tiger Global Management oversees the firm's $6 billion Tiger Global fund, which has holdings in many tech companies, including Apple (AAPL) and Google (GOOG). He also used to work as a technology analyst for Tiger Management founder Julian Robertson, whose Tiger Fund averaged a return of 39 percent annually from 1980 to 1998.

Kevin Feige

Under president of production Kevin Feige, Marvel Studios this year released "The Avengers," which grossed $1.5 billion at the box office. The Manhattan Beach, Calif.-based studio named Feige as its head in 2007, just before Disney (DIS) paid $4 billion for the action hero company -- including 5,000 Marvel characters.

Boaz Weinstein

The 39-year-old founder of Saba Capital Management last year started trading against JPMorgan (JPM), America's largest bank. Its former trader, Bruno Iksil, better known as the "London Whale," bet on credit default swaps in a huge gamble on the U.S. housing market. Weinstein took the opposite side of the trade, until JPMorgan in May announced a $2 billion loss on the transaction that has since risen to $6 billion. Weinstein, who manages $5.5 billion at Saba, used to trade for Deutsche Bank (DB).

Jeff George

Jeff George, the global head of Sandoz, runs the world's second-largest generic drug company. He holds an MBA from Harvard University, a Masters from Johns Hopkins University's School of Advanced International Studies and a BA from Carleton College in international relations. The 39-year-old businessman was formerly the senior director of strategic planning and business development at the Gap (GPS), a retailer. He has also worked in private equity.

Libby Wadle

Libby Wadle, the executive vice president of J. Crew, is 38. Fortune magazine describes her steady rise at the fashion retailer. She formerly worked at the Gap (GPS).

Salar Kamangar

The 36-year-old senior vice president of YouTube joined Google (GOOG) as its ninth employee after he graduated with a degree in biological sciences with honors from Stanford University.

Colin Fan

Headquarters, Deutsche Bank — Daniel Rolando/AFP/Getty Images/Deutsche Bank (image), Jason Henry McCormick/CBS (copy)

Deutsche Bank (DB) this year named the 39-year-old Colin Fan as co-head of corporate banking and securities, along with head of global markets. The Harvard University alumnus joined the German financial giant as a credit trader.

Brian Chesky

The 31-year-old Brian Chesky co-founded Airbnb.com, a website for couch surfers. He and his buddy, Joe Gebbia, in 2008 needed money for rent in San Francisco. So they started letting people crash at their pad, as long as their guests paid up. Soon Chesky was running a company that investors now value at about $2 billion.

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Ben Silbermann

Ben Silbermann, a 30-year-old Yale University graduate who formerly worked for Google (GOOG), co-created Cold Brew Labs, the company that launched Pinterest, an image-sharing website. He grew up in West Des Moines, Iowa, where as a boy he enjoyed collecting things, according to Business Insider. "What you collect says so much about who you are," says Silbermann.

Kevin Systrom

Kevin Systrom, a co-creator and the CEO of Instagram, sold his company to Facebook (FB) this year for an estimated $1 billion. Tech blog All Things Digitial also called the 28-year-old Systrom a "legitimately talented DJ."

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Victoria Ransom

Victoria Ransom, the 36-year-old CEO of Wildfire, sold the company that she and her husband, Alain Chuard, created in 2008 to Google (GOOG) this year for $400 million. She holds an MBA from Harvard Business School.

Mike Lazerow

Mike Lazerow co-founded Buddy Media, a Web-based provider of marketing software. He told CBS MoneyWatch last year that he values "subconscious decision-making," an approach that appears to have worked out for the 38-year-old entrepreneur. Salesforce.com this year bought Buddy Media for $689 million.

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Yoshikazu Tanaka

Yoshikazu Tanaka runs GREE, a mobile game-maker and social network. He started it in 2004 in his apartment. The 35-year-old founder and CEO of Japan's most popular social network holds a bachelor's degree in Law from Nihon University.

Daniel Ek

Daniel Ek, 29, is co-founder and CEO of Spotify, a popular online music streaming service that has inked deals with Coca-Cola (KO), McDonald's (MCD), Reebok (ADDDF) and AT&T (T). Despite its global popularity, Spotify remains in the red.