Warren Buffett, Michael Burry, and other elite investors just revealed major changes to their stock portfolios. Here are 5 key trades they made.

Warren Buffett.Reuters

• Warren Buffett, Michael Burry of "The Big Short," and others shared portfolio updates this week.
• Ray Dalio, Jim Simons, and Stanley Druckenmiller also disclosed their stock holdings as of March 31.

Warren Buffett, Michael Burry of "The Big Short" fame, and other top-flight investors made significant changes to their stock portfolios in the first quarter of this year, ranging from a huge wager on Chevron to a bet against Apple.

Ray Dalio, Jim Simons, and Stanley Druckenmiller's funds all made notable tweaks to their holdings. The first two bought or sold two of the best-known meme stocks, GameStop and AMC, while the third bet big on energy stocks and made a surprising wager against the S&P 500.

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