May 15 : Billionaire investor Bill Ackman built a new position in tech giant Microsoft after its stock price dropped recently, and sold his long-owned investment in Google parent Alphabet to help pay for it. Writing on social media platform X, Ackman said the investments will be detailed in a regulatory filing that his firm Pershing Square will make later on Friday with the U.S. Securities and Exchange Commission. That filing will show that Pershing Square owned some Alphabet shares at the end