Sandisk's 568% Surge: Is It Too Late to Buy?

Sandisk, spun off from Western Digital, has seen its stock skyrocket by 4,300% since its Nasdaq debut at around $35. In 2026 alone, the stock has surged 568%, making it the top performer in the Nasdaq-100. This explosive growth is driven by a supply-demand imbalance in the AI memory market, as hyperscalers like Microsoft, Amazon, Alphabet, Meta, and Oracle plan over $700 billion in capital expenditures for 2026.

Sandisk specializes in NAND flash memory, particularly enterprise solid-state drives (SSDs) optimized for AI inference and data lakes. This strategic positioning has fueled a 437% year-over-year increase in its data center segment, reaching $5.2 billion in trailing sales. The company's growth is not just a flash in the pan; it's backed by substantial long-term commitments.

Sandisk has secured 'New Business Model' supply agreements with eight major data center and edge customers. These contracts, averaging four years in duration, guarantee a minimum of $93.9 billion in contracted revenue at floor pricing. This covers half of the company's fiscal 2027 bit supply and two-thirds of fiscal 2028, providing unprecedented revenue visibility in a historically cyclical industry.

In addition to revenue security, Sandisk is returning capital to shareholders aggressively. In Q4, it executed $4.5 billion in share repurchases and authorized an additional $15.5 billion buyback. This capital return program signals management's confidence in the company's financial health and future prospects.

Another overlooked catalyst is Sandisk's joint venture with Kioxia, which helps keep capital expenditures low relative to sales. This allows Sandisk to focus on improving chip architectures rather than building new factories, enhancing its competitive edge and profitability.

The AI boom is driving unprecedented demand for memory solutions, and Sandisk is at the forefront. With hyperscalers allocating 30% of their capex to memory, Sandisk's enterprise SSDs are essential for AI workloads. This demand is not just a short-term trend; it's backed by multi-year contracts that provide revenue stability and reduce cyclicality.

Wall Street expects Sandisk's earnings to more than double in the coming year, yet the stock trades at a forward P/E of around 7. This is a steep discount to the semiconductor industry average of 27, suggesting the market is still pricing in cyclical risks that may be outdated. Sandisk's transformed business model, with locked-in revenue and growing free cash flow, justifies a higher multiple.

The company's joint venture with Kioxia is a strategic advantage, allowing it to maintain low capex intensity while still meeting demand. This operational efficiency could lead to higher margins and stronger cash flow, further supporting a re-rating of the stock.

However, investors should be aware of the risks. The memory industry has historically been cyclical, and a slowdown in AI spending could impact Sandisk. But with $93.9 billion in contracted revenue, the downside is somewhat protected. The stock's current valuation seems to embed skepticism that the AI cycle will revert, but the evidence points to sustained demand.

For investors, the key question is whether Sandisk's growth is sustainable. Given the long-term contracts, strategic partnerships, and attractive valuation, the answer appears to be yes. The stock may still have significant upside as the market recognizes the transformation of Sandisk's business.