Hedge fund manager Ken Griffin continued to sell Tesla in the second quarter, but he bought a substantial position in Nvidia.

Ken Griffin of Citadel Advisors is the most successful hedge fund manager in U.S. history as measured by net gains. Further, Citadel beat the S&P 500 ( ^GSPC 0.49% ) by 9 percentage points during the last three years, which makes his portfolio a good place for individual investors to find inspiration.

Griffin made several noteworthy trades during the second quarter. He sold shares of Tesla ( TSLA 2.27% ) for the fourth consecutive quarter, slashing an already-small position by 30%. He also added shares of Nvidia ( NVDA 0.34% ) , increasing his position by 900% such that it now ranks as his second-largest holding.

Interestingly, Nvidia has

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