David Tepper's Appaloosa Management trimmed its Micron Technology stake by about 41% in the second quarter, selling 690,000 shares and ending June with 975,000 shares worth $1.125 billion after the AI memory stock surged roughly 242% during the period. Micron remained the fund's second-largest holding behind Amazon as strong demand for high-bandwidth memory and DRAM, record fiscal third-quarter revenue of $41.46 billion, adjusted earnings per share of $25.11, an 84.9% adjusted gross margin and a $50 billion fourth-quarter revenue forecast fueled the rally. Appaloosa also exited Sandisk and added to Amazon, Meta Platforms, Taiwan Semiconductor, Uber, Alphabet, Vistra and Nvidia, while opening Apple put options and new positions in Boeing and American Airlines. The fund's 13F portfolio stood at about $7.73 billion across 27 holdings at quarter-end, pointing to a shift away from memory-cycle risk toward larger technology platforms even as Wall Street still sees upside in Micron after a recent pullback.