Can SanDisk Stock Keep Climbing When It Cannot Make Enough To Sell

SanDisk (SNDK) finished fiscal 2026 with $20.2 billion in revenue, and its stock has returned roughly 2,700% over the past twelve months, while the shares still sit about 25% below their 52-week high. Anyone buying now is asking one question. What powers the next leg, when the company has already said it can only make so many more bits?

SanDisk Cannot Simply Make More To Sell More

The company says it grows supply mainly through nodal transitions rather than by adding wafers, so bit output climbs at a mid- to high-teens rate, with sellable bits only mid-teens in fiscal 2027, as it holds more inventory to serve its new contracts. BiCS 8 already carries the majority of its bit production, and the ramp of BiCS 8 and BiCS 10 lifts capital spending in dollars in fiscal 2027 even as that spending falls to roughly 6% of revenue. Management has said demand is growing faster than supply, and expects bits to stay on allocation beyond calendar 2027. Volume is spoken for.

SanDisk Has Bounded What It Can Charge On Most Of Its Bits

Price did most of the recent work. About two-thirds of the sequential revenue growth in fiscal Q4 2026 came from higher pricing and about a third from volume, by the company's own account, a one-quarter split that isn't directly comparable to the mid- to high-teens bit-growth rate, which is an annual figure. Its multiyear customer agreements now set both fixed and variable pricing, with the variable part bounded by floors and ceilings, and management expects them to cover more than half of its bits in fiscal 2027 while still earning attractive margins even at floor pricing.

The margin guide shows what that costs. Non-GAAP gross margin is guided to 83% to 85% for fiscal Q1 2027, a range whose top barely clears the 84.6% the company just delivered, even with prices still rising. That 84.6% came in above the 79% to 81% guided for fiscal Q4 2026, so SanDisk has already beaten the top of its own margin guide once. Volume is set, and most of the pricing is bounded, which leaves where the bits go, and they are going to the data center.

You Are Buying The Data Center Mix Shift Now

Data center revenue was $1.47 billion of the $5.95 billion SanDisk booked in fiscal Q3 2026, about a quarter of the total. In fiscal Q4 2026, it was $2.98 billion of $8.97 billion, a third. The company began shipping its QLC platform for high-capacity AI data lakes in fiscal Q4 2026, which completed its line alongside the TLC enterprise SSDs it already ships to hyperscale and AI infrastructure customers.

A larger data center mix lands on a cost base that shrinks as a share of revenue, with non-GAAP operating expenses down to 5.4% of revenue in fiscal Q4 2026. That is why the fiscal Q1 2027 revenue guide of $10.3 billion to $10.8 billion carries more for a buyer than the margin guide does, and why SanDisk is worth ranking against other companies whose guidance keeps climbing. The number to watch is the data center share of revenue. If that share keeps climbing through fiscal 2027 against a cost base that does not, the contracts will look like a fair trade for the visibility they bought.

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