Should You Buy Billionaire Investor Stephen Mandel's Top 5 Stock Picks in August?

Stephen Mandel’s Lone Pine Capital has disclosed its latest hedge-fund bets in a March 31 13F filing made public May 15, listing five U.S.-traded positions tied to AI power, semiconductor capital spending, aerospace materials, wealth consolidation and ad-tech. One holding is up 99.03% over the past year, while another has surged alongside a large buyback. In the portfolio, Carpenter Technology (CRS) is framed as a specialty-alloys supplier to jet engines and defense programs, with Q3 FY26 revenue at $811.5 million (+11.6% YoY) and adjusted aerospace-defense margins reaching 35.6%. Another pick, Vistra (VST), is cast as a grid-constrained dispatch power play.