Tepper Bets AI Infrastructure Over Chips: Exits SanDisk, Trims Micron, Bets on CoreWeave, Amazon and Utilities

David Tepper’s Appaloosa disclosed in its Q2 2026 13F a pivot from memory chips to AI infrastructure bets: he trimmed Micron by 690,000 shares to 975,000 and exited SanDisk, while also reducing AMD and Qualcomm, and redeploying the cash into Amazon (5 million shares), a new CoreWeave stake, a larger TSMC position, and NVIDIA, plus new Vistra and NRG stakes—an AI-stack rotation focused on infrastructure and power for data centers regardless of which chipmaker wins.