Timing clarification: Sandisk is scheduled to report today, Wednesday, August 5, 2026, not tomorrow. Its earnings call is at 1:30 p.m. Pacific / 4:30 p.m. Eastern. The company will also host an Investor Day on August 13.
Sandisk enters fiscal 4Q26 following an extraordinary reset in its earnings profile. In fiscal 3Q, revenue nearly doubled sequentially to $5.95 billion, non-GAAP gross margin expanded to 78.4%, and non-GAAP EPS reached $23.41—well above the company’s prior outlook. Management attributed the upside to NAND pricing, a shift toward higher-value customers and a sharp acceleration in data-center SSD demand.
For 4Q, Sandisk guided to another step-up:
| Metric | 3Q26 actual | 4Q26 company guide | Midpoint sequential change |
|---|---|---|---|
| Revenue | $5.95B | $7.75B–$8.25B | +34% |
| Non-GAAP gross margin | 78.4% | 79.0%–81.0% | +160 bps |
| Non-GAAP operating expenses | $448M | $480M–$500M | +9% |
| Non-GAAP EPS | $23.41 | $30.00–$33.00 | +35% |
The immediate numerical bar is high, but the more important hurdle is qualitative: investors need confirmation that Sandisk can maintain pricing, expand data-center mix, convert long-term agreements into visible backlog, and provide a credible fiscal 2027 framework without signaling that current margins are simply a peak-cycle phenomenon.
A July 6 press report cited consensus 4Q EPS of $33.80, above the top end of Sandisk’s April guide. That means the relevant hurdle may be materially higher than “beating guidance,” particularly after the company’s history of substantial upside versus its own forecasts.
The guide midpoint implies approximately $8.0 billion of revenue and $31.50 of non-GAAP EPS. Based on the fiscal 3Q exit rate, a result merely near the midpoint would still represent exceptional execution. But the market will likely focus on:
The core risk is that expectations have moved faster than published consensus. Sandisk’s April guide was issued before the full magnitude of recent AI-memory optimism became embedded in investor forecasts.
Sandisk guided to 79%–81% non-GAAP gross margin in 4Q, following 78.4% in 3Q. That would be remarkable for a business historically viewed as highly cyclical.
Management has argued this is not just a spot-pricing outcome. Its thesis is that:
Investors should nonetheless distinguish between current-cycle gross margins and a defensible through-cycle margin framework. The key earnings-call question is not simply whether 4Q gross margin lands at 80%; it is whether management gives a credible indication of where margins can settle if pricing moderates.
Watch for:
Data-center revenue rose 233% sequentially in fiscal 3Q to $1.47 billion, reaching roughly 25% of total revenue. The growth was driven primarily by TLC enterprise SSD demand for performance-intensive AI infrastructure workloads.
The major incremental catalyst for 4Q is the initial revenue ramp of “Stargate,” Sandisk’s QLC enterprise SSD offering. Management characterized 4Q as the first quarter of recognized Stargate revenue after customer qualifications, making this report an early test of whether the company can add a storage-density product cycle alongside its established performance-oriented TLC products.
The data-center questions to watch are:
The bull case is that data-center SSD revenue remains in an early ramp, with both TLC and QLC products broadening Sandisk’s content opportunity. The bear case is that investors have already capitalized several years of AI-storage demand into expectations, leaving little tolerance for a slower-than-expected QLC ramp or cautious customer commentary.
Sandisk’s most consequential strategic disclosure in fiscal 3Q was its new multiyear customer-contract structure, or New Business Models (NBMs).
At the April earnings call, the company disclosed:
The 4Q report should offer the first meaningful update on whether the signed-agreement count, RPO, prepayments, and committed fiscal 2027 volume have increased. This may be the single most important item for the stock.
If genuine volume commitments, customer collateral, and pricing mechanisms can protect a meaningful portion of Sandisk’s output, the company may deserve a different valuation framework from the historically cyclical NAND market. Conversely, uncertainty around contract enforceability, pricing flexibility, customer concentration, and Sandisk’s ability to fulfill supply obligations remains the principal fundamental challenge to that thesis.
Sandisk itself acknowledges the risk: if either party fails to meet contractual commitments, the company could face lost revenue, excess inventory, underutilization, financial penalties, or a need to resell affected volumes into a less favorable market.
Best outcome: updated RPO materially above $42 billion, more signed contracts, higher fiscal 2027 committed-bit coverage, and clear evidence that agreement economics support current margin levels.
Disappointing outcome: few incremental agreements, limited detail on actual contracted economics, or a suggestion that the company is deferring substantive disclosures until the August 13 Investor Day.
Sandisk closes a 53-week fiscal 2026 on July 3, 2026. Using the midpoint of 4Q guidance, fiscal-year revenue would be about $19.3 billion, versus $11.3 billion through the first nine months.
The August 13 Investor Day creates an unusual two-step catalyst sequence:
This could reduce the need for management to disclose every long-term target in the earnings release. However, investors are likely to expect at least directional fiscal 2027 commentary on revenue, gross margin, bit growth, capital spending, and cash return at the August 5 report.
Sandisk ended fiscal 3Q with:
There are competing cash uses. Sandisk completed a roughly $972 million investment in Nanya in April to secure DRAM supply for its expanding data-center SSD business, and it remains committed to investments associated with Flash Ventures and the Kioxia manufacturing partnership. Still, the company’s strong cash generation means investors will seek evidence that buybacks have begun and can coexist with the investment needed to support BiCS transitions, enterprise SSD expansion, and supply-chain resilience.
Key disclosures:
SNDK closed at $1,427.66 on August 4. The stock has been exceptionally volatile:
That drawdown has reduced some near-term valuation pressure, but it does not make the setup easy. The issue is that Sandisk’s results and earnings estimates have risen so quickly that investors may require both an earnings beat and proof that fiscal 2027 economics can remain unusually strong.
Sandisk’s fiscal 4Q report is a durability test, not a simple quarterly beat/miss event. The company has already demonstrated that tight NAND supply, AI-driven storage demand, enterprise SSD mix, and pricing can produce extraordinary financial results. Investors now need evidence that those earnings are contractually supported, technologically sustainable, and repeatable into fiscal 2027.
The three most important datapoints are:
The August 13 Investor Day is an important follow-on catalyst, but an earnings report that materially exceeds the April outlook while strengthening the contract-visibility narrative would reinforce the case that Sandisk is evolving from a traditional cyclical NAND supplier into a higher-visibility AI-storage platform.