Several of Wall Street's most successful hedge fund managers bought Nvidia stock in the second quarter.

Beth Kindig, technology analyst at the I/O Fund, believes Nvidia ( NVDA -1.10% ) will be a $10 trillion company no later than 2030. That implies 122% upside from its current market value of $4.5 trillion. But she's not the only expert with conviction in the chipmaker. Forms 13F show several hedge fund billionaires bought Nvidia stock aggressively in the second quarter.

Ken Griffin of Citadel Advisors bought 6.1 million shares, an increase of 922%. Nvidia is the second largest position in his portfolio.

Philippe Laffont of Coatue Management added 2.9 million shares, an increase of 34%. Nvidia is the eighth largest position in his portfolio.

David Tepper at Appaloosa bought 1

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