Billionaire David Tepper Sold Micron and Sandisk, and Is Hedging Against 1 of Their Largest Customers

Appaloosa Management’s David Tepper booked strong 1H 2026 performance (+32% gross) but trimmed Micron by 41% in the latest quarter and fully exited Sandisk. His 13F also showed large Apple put exposure—put options to sell 835,000 Apple shares worth about $242M—signaling concern about Apple’s gross margin pressure from elevated memory prices tied to AI data-center demand. Overall, the moves are more positioning/hedging than a clear fundamental read-through for any single stock.

Analysis

The real signal here is not a bearish call on any single name; it’s a late-cycle change in positioning after a strong memory upcycle. When a concentrated allocator starts trimming the highest-beta beneficiary first, it usually means the marginal upside from further ASP expansion is shrinking faster than consensus expects, while the downside from any inventory normalization is still underappreciated. For MU and SNDK, the next 1-3 months matter more than the next 12: if hyperscaler ordering slows even slightly, the market can re-rate these names down several turns before the fundamentals visibly roll over.

Apple is the cleaner second-order beneficiary if memory inflation persists, but the risk/reward is asymmetric because margin compression tends to show up in guidance before it shows up in reported EPS. That makes AAPL a better candidate for a tactical put spread than outright shorting: downside is capped by quality/FCF support, but multiple compression is plausible if investors realize the “AI beneficiary” label does not immunize it from component inflation. The bigger structural loser could be any device OEMs with weaker pricing power, since they absorb input-cost pressure without the same ecosystem lock-in.

The contrarian miss is that 13Fs are stale and opaque: the Apple puts may be a hedge, and MU remains a large holding, so this is not a conviction short on semis. Still, the move likely reflects a view that peak earnings multiples in memory are being paid too early. Falsify the thesis if MU/SNDK guide to sustained supply discipline and if AAPL’s gross margin commentary stops deteriorating despite higher memory costs.

Key Decisions for Investors

• Watchlist, not immediate conviction trade: fade MU and SNDK on post-earnings strength only if management commentary implies 2H pricing inflection; otherwise stay neutral until next quarterly guide. Time horizon: 1-3 months. Falsifier: continued upward revisions to DRAM/NAND pricing and capex restraint.
• Consider a tactical AAPL bearish put spread into the next earnings window if implied vol is reasonable, targeting a 5-8% downside move on margin-pressure language. Risk/reward: defined-risk hedge rather than outright short. Falsifier: gross margin guidance stability and sustained services offset.
• If you want a relative-value expression, prefer long quality mega-cap cash generators vs short a memory basket (MU/SNDK) on any post-rally momentum blowoff. This isolates peak-earnings risk rather than making a macro AI call.
• Set an alert on MU/SNDK 12-month forward EPS revision breadth: if revisions roll over while price remains elevated, that is the cleaner entry signal than the 13F itself.