Billionaire David Tepper Sold Most of Appaloosa's Position in Microsoft and Initiated a New Stake in an Artificial Intelligence (AI) Memory Stock Up Over 4,100% in the Past Year

David Tepper has run Appaloosa since the early 1990s and generated tremendous returns for investors. The article notes that he converted the hedge fund into a family office in 2019. This is a factual profile update with no immediate market-moving catalyst.