The rapid adoption of artificial intelligence (AI) has been great for (NASDAQ: MSFT). The stock is up 72% since 2022, but that might have some investors wondering if it's still a good investment. After all, the stock's price-to-earnings (P/E) ratio is currently sitting at 34, which is toward the high end of its 10-year range and higher than the S 500's P/E of 30.

Co-founder and former CEO Bill Gates has donated billions worth of Microsoft stock to the Bill Melinda Gates Foundation, and while the foundation continues to hold a large stake in Microsoft, it has sold shares in each of the last four quarters.

Keep in mind, the Gates Foundation has regularly sold off Microsoft shares for many years, which obviously reflects its philanthropic mission with the assets. There are other notable billionaire investors who still hold large stakes in Microsoft. Chase Coleman's Tiger Global Management is sitting tight with a $3 billion stake in the third quarter, while John Armitage's Egerton Capital was buying more shares.

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Source Fool.com