Sandisk Stock Jumps 5,700% in a Year Amid AI Memory Demand Surge

Sandisk (NASDAQ: SNDK) for approximately $40. The stock now trades above $2,300, representing a more than 50-fold increase and over 20% upside on Thursday alone following strong quarterly results from memory chipmaker Micron Technology. The NAND flash memory manufacturer, spun off from Western Digital in early 2025, has emerged as one of the top performers in the S&P 500 this year.

Image source: Getty Images.

The AI-Driven Memory Shortage

A persistent shortage of high-capacity flash storage for AI data centers has driven NAND flash prices sharply higher, creating explosive growth for memory manufacturers. Micron recently reported record quarterly revenue of $41.5 billion, with NAND revenue nearly doubling quarter-over-quarter to $9.9 billion.

Sandisk is capitalizing on the same trend. The company’s fiscal third quarter revenue jumped 251% year-over-year to $5.95 billion, with a 97% increase from the prior quarter. Data center revenue, now its fastest-growing segment, surged 233% sequentially to approximately $1.5 billion. Sandisk’s non-GAAP gross margin reached 78.4%, a remarkable achievement for a business historically defined by volatile margins.

CEO David Goeckeler emphasized: “NAND flash is emerging as the only economically viable solution to deliver the capacity, performance, and efficiency required to keep models accessible for real-time inference at scale.”

Securing Future Growth

To sustain momentum, Sandisk has established five multi-year supply agreements, representing its new business model. These contracts include more than $11 billion in financial guarantees and cover over a third of the company’s planned fiscal 2027 output. Management believes this structure will deliver “structurally higher earnings” and reduce business cyclicality.

Valuation Concerns and Risk Assessment

At face value, Sandisk trades at a price-to-earnings ratio of approximately 78, suggesting the stock may have outpaced fundamentals. However, this metric incorporates several weaker historical quarters while current performance reflects dramatically improved earnings. With management guiding for adjusted earnings of $30 to $33 per share in the fiscal fourth quarter—exceeding total prior-year earnings—the forward P/E ratio approaches 18.

The primary risk lies in memory’s inherent cyclicality. Current elevated margins stem from temporary supply constraints that historically attract new capacity additions, ultimately pressuring prices and profits. While Sandisk’s contracts should cushion downside, they cannot eliminate cyclical volatility entirely.

After such a rapid ascent, near-term gains may be limited. The forward valuation appears reasonable if AI-driven demand persists and new contracts perform as projected, though significant upside is already priced into the stock. Investors should view Sandisk as a high-risk play on the memory boom, suitable for small positions only unless possessing unique industry insights.