Bill Ackman is betting big on Microsoft's success in the AI era. Billionaire investor Ackman said on Friday that his hedge fund, Pershing Square Capital Management, has taken a position in Microsoft, saying he has been following the company for many years and that it now has a "highly compelling valuation." Ackman introduced the Microsoft stake in an X post, saying his team has "found occasional opportunities to acquire some of the most dominant long-term compounding franchises at attractive