What they said
The model is in the press release and it is short. From fiscal 2028 through fiscal 2030 Sandisk expects revenue to grow mid-to-high teens, “consistent with bit growth,” non-GAAP gross margin to sustain at approximately 80 percent, non-GAAP operating margin at approximately 75 percent, with operating expense around five percent of revenue and no meaningful other income or expense, and adjusted free cash flow margin at approximately 50 percent after taxes, capital spending and working capital. Luis Visoso: “We are optimizing for growth, sustainability and returns. As we do that, we expect to return 100 percent of excess cash to our shareholders after investing in the business.”
The contracts are the part that matters. Sandisk has signed New Business Model agreements with eight customers, “built on committed volumes, enforceable contractual frameworks with minimum financial guarantees, and structured pricing mechanisms,” representing approximately 50 percent of bits in fiscal 2027 and approximately two-thirds of bits in fiscal 2028. The CFO deck, as reported from the room, sized them at $93.9 billion of total contract value, $91.1 billion still to be recognized, and $16.5 billion of financial guarantees behind them, with the agreements running more than four years unverified. Three of the eight are U.S. hyperscalers unverified.
On technology, BiCS10 QLC at a 60 percent bit-density increase over BiCS8, a BiCS9 QLC derivative that pairs a BiCS8 array with BiCS10 CMOS, and an enterprise data-center flash market the company sizes at 1.2 zettabytes by 2030. High Bandwidth Flash is “gaining momentum” and is not in the model.
Read against the view
The piece said the beat was never the question. Revenue $8.965 billion, an 84.6 percent non-GAAP gross margin, a $10.55 billion midpoint for the September quarter, and a stock that fell anyway because the cycle was already in the price. The read that mattered, it said, was what an 84 percent margin says about the fab Sandisk shares with Kioxia, and how long the discipline behind it holds.
The investor day took that second question and converted it. It is no longer a question about the cycle. Two-thirds of fiscal 2028 bits now sit under committed volume with a minimum financial guarantee attached, so the thing that would have to break for the margin to break is a contract, not a spot price. That is a different kind of risk and a smaller one.
The tell is the margin the company chose. The model says approximately 80 percent. The quarter just printed said 84.6 percent and the quarter being guided says 83 to 85 percent. Sandisk is guiding its own long-term gross margin below the two numbers in front of it and calling the lower one durable. Read that as the company refusing to capitalize the peak, which is exactly the discipline the August piece was asking about. A management that believed 85 percent was the base would have modeled 85 percent.
What the day did not answer is price. The agreements carry “structured pricing mechanisms,” which in the transcript means fixed and variable components, and the 80 percent therefore assumes the variable component holds. The guarantee is the floor under that assumption, and the floor is $16.5 billion against $91.1 billion of remaining obligations, about 18.1 percent derived. If NAND pricing rolls inside the contract term, the guaranteed number is less than a fifth of the backlog number. Nobody at the event was asked to reconcile the two, and the company did not volunteer it.
What changed in the view, and what did not
Unchanged: the margin is still a wafer-stream margin shared with Kioxia, and Sandisk still does not run the fabs alone. Operating expense at five percent of revenue is the arithmetic of a royalty on a wafer stream, and that is what the model describes.
Changed: the durability question now has a date on it. Fiscal 2028 bits are two-thirds contracted, so the first year the model has to prove itself is the year it is most protected. The honest test is fiscal 2029, when the first of the four-year agreements will be a year from renewal and the pricing mechanism will have been through a down-leg or will not have.
Left unresolved, stated plainly: the split between fixed and variable inside the pricing mechanism was not disclosed, and without it the 80 percent cannot be stress-tested from the outside.
- Wrong if the Q1 FY27 print on comes with non-GAAP gross margin below 80 percent, or with fiscal 2027 bit coverage under the agreements restated below 50 percent.
- Right if that print holds non-GAAP gross margin at or above 83 percent and the eight-customer count holds or grows.
The tape, for the record: $1,528.11 on the day, $1,641.73 the next session, $1,786.85 by , and $1,704.16 on . The stock that sold the record bought the contract.