SanDisk Stock Surges 600% on AI Memory Demand

SanDisk Corporation has emerged as the top-performing stock in the S&P 500 for 2026, with its share price increasing between 520% and 650%. This growth is driven by a surge in demand for NAND flash memory used in data center solid-state drives for artificial intelligence build-outs. Because industry production capacity cannot keep pace with this demand, the market remains supply-constrained, leading to significant price increases for these commoditized products.

The company's finance chief reported that higher prices accounted for approximately two-thirds of revenue growth last quarter. To protect future earnings, SanDisk signed long-term contracts with eight major customers that include minimum prices, covering roughly half of next year's output and two-thirds of the following year's.

Despite the rally, investors remain cautious due to the memory industry's historical boom-and-bust cycles, leaving the stock with a low forward P/E ratio of approximately 8. While some analysts expect supply to increase by the second half of 2027, industry peer Micron Technology forecasts that demand tightness will worsen through 2027 and 2028. Micron expects NAND shipments to grow in the low-20s percentage range in its 2027 outlook, with some client deals extending through 2030. Analysts suggest that if this demand persists, SanDisk could see further valuation increases as it breaks away from traditional cyclical trading patterns.