Should You Buy SanDisk Stock Because It Has Started Retiring Its Own Shares

SanDisk (SNDK) shares have surged from below $80 to over $1,650 over the past twelve months-a more than twentyfold run-and while they have given back about 13% over the past three months, they remain roughly 30% below their $2,354 peak. The argument against them is about a ceiling on margins. The number that complicates it is the share count.

What Did SanDisk Give Up When It Agreed To Pricing Ceilings?

The company has been turning its NAND supply into multi-year agreements it calls new business models, and it expects them to cover more than 50% of its bits in fiscal 2027. Non-GAAP gross margin reached 84.6% in fiscal Q4 2026, and the guide for fiscal Q1 2027 is 83% to 85% on the same basis, with modest price increases still expected. The worry is that fixed elements and pricing ceilings hand away the top of a historic up-cycle.

Management rejects the idea that the agreements drag on margin, pointing to prudent assumptions on component costs inside the guide. The bear case is still reasonable. SanDisk has traded some of its upside in a fast-rising price environment for predictability.

How Much Of Its Own Stock Has SanDisk Bought?

In fiscal Q4 2026 SanDisk repurchased $4.5 billion of its own shares.

Adjusted free cash flow came to $5.0 billion in the same quarter, a figure that excludes $1.9 billion of customer prepayments and deposits, meaning close to nine-tenths of that adjusted cash flow went straight into the stock (or about two-thirds of total free cash flow). The board then lifted the remaining repurchase authorization to $15.5 billion, about 6% of a market value near $240 billion. The stock trades at 21 times trailing earnings.

By management's own account, the visibility is what makes the cash durable. The agreements signed so far carry a minimum of $93.9 billion of revenue at floor pricing, across terms that average more than four years, and customers have posted $16.5 billion of guarantees behind them. A margin ceiling caps the rate of profit. It does not cap what the company does with the cash: the buyback began only in fiscal Q4 2026, when SanDisk retired 2,836,000 shares and closed the quarter with 157 million diluted shares outstanding.

Can SanDisk Keep Buying If The Cycle Cools?

Management expects smartphone and PC units down by the mid-teens in calendar 2026, though average capacity per smartphone is still rising, and sees those markets back to growth only in calendar 2027. Datacenter is the fastest-growing end market, built on BiCS 8, which ramped to the majority of bit production in fiscal 2026, and on the high-capacity enterprise SSDs that AI inference runs on. Management says demand is growing faster than supply.

So the case is narrow. The margin ceiling is real, the smartphone and PC markets are working through an adjustment, and buying back stock inside a price cycle this hot is itself a bet on where the cycle ends. Still, the buyback has the board's remaining $15.5 billion authorization behind it while the stock sits below its own high.

For shares trading roughly 30% off their record high, a dip-buying screen is the place to test that. What to watch is whether the buyback holds this scale as the authorization is drawn down.

So Do You Buy SanDisk For The Buyback?

Perhaps, if you can sit through a cycle nobody can forecast. A buyback is one company's decision, and a board can stop it as easily as it started it. If you would rather not make that call at all, look at the Trefis High Quality Portfolio. That portfolio has a track record of outpacing the three major indices.