How SanDisk's Stock Jumped 700% Amid a NAND Supply Crunch

Nothing ages faster on Wall Street than yesterday's certainty. One minute a hardware maker is a niche name; the next, it's the market's hottest stock. How did SanDisk pull off that transformation?

Shares of SanDisk climbed roughly 700 percent over the past year, touching an all-time high of $2,167 on June 16. The surge followed the company's early-2025 split from Western Digital and has driven its market capitalization to about $312 billion. In barely a year SanDisk went from a $1.64 billion loss in 2025 to generating multi-billion dollar profits each quarter, powered by runaway demand for NAND flash.

The catalyst is straightforward but powerful: a tight NAND cycle. AI workloads and hyperscale data centers gobble storage—fast, dense flash at scale—and suppliers have struggled to keep pace. When supply can’t match demand, prices climb. Margins swell. For a company that manufactures NAND-based storage, that environment looks like an open runway.

Still, markets rarely follow a straight line. Investors are now nervously watching the Federal Reserve. A shift in interest rates could magnify moves both up and down. SanDisk’s share price already sits above many analysts’ targets, which raises the question: is this a durable re-rating or a market exuberance that needs tempering?

Opinions split. Some strategists warn of a prolonged memory shortage stretching toward 2030 as AI growth keeps demand elevated. Others point out that memory has a commodity-like cycle—capacity additions and price mean-reversions are part of the game—and expect some form of correction once suppliers catch up.

Either way, SanDisk’s turnaround highlights how structural shifts in computing—AI, massive datasets, and the need for denser, cheaper storage—can rewrite valuations fast. Watch factory ramps, contract pricing and central bank signals; those three levers will decide whether this rally is the start of a long boom or simply the market’s latest sprint.