Tepper backs SanDisk as AI deal reviews growth and valuation risks

• David Tepper’s Appaloosa leadership team has taken on a new position as SanDisk (NasdaqGS:SNDK) shifts its business around AI.
• SanDisk reported blockbuster third-quarter fiscal 2026 results, supported by a new business model centered around AI data center demand and long-term supply deals.
• The company has secured more than $42 billion in multi-year deals with hyperscalers, adding a new layer of revenue visibility beyond typical memory industry cycles.

For investors focused on AI infrastructure, SanDisk is currently at the center of two storylines: a rapid stock revaluation and a high-profile entry into hedge funds. The stock is trading at $1,478.69, and is up an impressive 39x in one year, with a year-to-date return of 437.2%, and an additional 58.6% in the past month and 5.0% in the last week.

What stands out is that SanDisk’s AI-driven data center exposure is currently tied up in multi-year supply contracts worth more than $42 billion, which adds a different revenue profile than shorter-cycle memory swings. With prominent institutional investors stepping in after Q3 executions, readers may want to reevaluate how they think about SNDK’s risk, timing, and position sizing within their broader portfolios.

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Let’s take a look at which insiders are buying or selling SanDisk following this latest news.

Investor checklist: How does this news fit into your theory?

quick evaluation

• ⚖️ Price and Analyst Targets:SanDisk is trading at $1,478.69, about 1% below the consensus target of $1,493.36 and within a 10% “fair” range.
• ❌ Simply Wall Street Ratings: The stock has been flagged as trading 68.4% above its estimated fair value, which is clearly above the estimate of its intrinsic value.
• ✅ Recent momentum:30-day return of 58.6% highlights very strong short-term momentum following Q3 and contract news.

There’s only one way to know when is the right time to buy, sell, or hold SanDisk. For our latest analysis of fair value for SanDisk, check out Simply Wall St’s company report.

Key considerations

• 📊 Tepper’s new position, plus $42 billion in multi-year AI data center contracts, further strengthens SanDisk’s position as an AI infrastructure stock to watch.
• 📊 Pay attention to contract fulfillment, long-term trading margins, and how the P/E ratio of 48.6 compares to the Technology industry average of 43.6.
• ⚠️ This stock is perceived to be overvalued, and recent volatility and insider selling have been flagged as risks, which could be significant given rapid price movements.

dig deeper

For the complete picture, including additional risks and rewards, see our complete analysis of SanDisk. Alternatively, you can visit SanDisk’s community page to see how other investors think this latest news will impact the company’s story.

This article by Simply Wall St is general in nature. We provide commentary using only unbiased methodologies, based on historical data and analyst forecasts, and articles are not intended to be financial advice. This is not a recommendation to buy or sell any stock, and does not take into account your objectives or financial situation. We aim to provide long-term, focused analysis based on fundamental data. Note that our analysis may not factor in the latest announcements or qualitative material from price-sensitive companies. Simply Wall St has no position in any stocks mentioned.

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