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Earlier this month, a 29-year-old took control over the finances of a company worth nearly $100 billion.

David Knopf, a partner at private equity firm 3G Capital, was appointed CFO of Kraft Heinz Co. (KHC) on Sept. 8, replacing Paulo Basilio. 3G owns 23.9% of Kraft Heinz since orchestrating the merger of Kraft and Heinz with Berkshire Hathaway Inc. (BRK.B) , which itself holds a 26.7% stake.

Knopf, a Goldman Sachs Group Inc. (GS) alum, is still older than Joshua Kobza was when he became CFO of Restaurant Brands International Inc. (QSR) at 28 in 2013. The Burger King, Tim Hortons and Popeyes parent is also backed by 3G.

Here's a look at some other young execs at major companies.

Mark Zuckerberg, Facebook

Facebook CEO Mark Zuckerberg recently said that he'd consider using cryptocurrency and encryption as safety tools on the platform.

Famously launching Facebook Inc. (FB) from his dorm room at age 19, Mark Zuckerberg was just 28 when the company went public. Since then, the 33-year-old has led Facebook shares to a compound annual growth rate of 32.4%, compared to the S&P's 13.1% growth during the period.

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Joseph Levin, IAC/InterActiveCorp

38-year-old Joey Levin has been CEO of Barry Diller's internet company IAC/InterActiveCorp (IAC) for two years. He also serves on the board of Match Group Inc. (MTCH) and Groupon Inc. (GRPN) . Like Knopf, he's a former investment banker.

Snap Inc CEO and co-founder Evan Spiegel

Evan Spiegel, Snapchat

Like Facebook's Zuckerberg, Evan Spiegel, the co-founder and CEO of Snapchat parent Snap Inc. (SNAP) , left college to run the then-startup. He and Snap co-founder and CTO Bobby Murphy control the company, which went public in March.

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Keith Cozza, Icahn Enterprises

After 10 years at Icahn Enterprises LP (IEP) , Keith Cozza, now 38, became its CEO in 2014. The conglomerate is controlled by 81-year-old investor Karl Icahn. Cozza is also a director at one of Icahn's most famous investments, Herbalife Ltd. (HLF) .

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James Park, Fitbit

A Harvard dropout like Zuckerberg, James Park co-founded fitness wearables maker Fitbit Inc. (FIT) . His latest challenge is to make wearables a necessity rather than a mere accessory: Fitbit shares are down 13.8% in 2017 and 62.8% year over year.

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Stefan Larsson, Ralph Lauren

As president of Gap Inc.'s (GPS) Old Navy, Stefan Larsson, an H&M veteran, transformed the brand into Gap's top-performing segment. He then succeeded founder Ralph Lauren as CEO of Ralph Lauren Corp. (RL) when he was barely 40, leaving on May 1 after less than two years due to differences with Lauren.

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