Making sense of Sandisk’s long-term financial model – Bristlemoon Capital

Sandisk has told investors its long-term model can sustain roughly 80% gross margins through FY30, but the floor prices embedded in its own customer contracts sit an estimated 26% to 28% below what the company is realizing today.

That gap is the crux of a new report examining Sandisk's eight New Business Model (NBM) agreements, a $94 billion, four-year revenue commitment the company has framed as a stabilizing force in a historically volatile NAND market. Bristlemoon Capital, whose position was not specified in the materials reviewed for this report, argues the model is less a forecast than "investor marketing," reconcilable only if prices fall to contract floors by FY28, and prone to swinging far worse if the industry tips into oversupply.

Ticker: SNDK (Sandisk)
Research Firm: Bristlemoon Capital
Report URL: https://www.bristlemoonresearch.com/p/making-sense-of-sandisks-long-term?ref=shortreport.fyi
Position Disclosure: Not specified in the source materials provided.

Thesis

Bristlemoon Capital's report centers on a single tension: Sandisk's headline margin target and its own contract pricing don't appear to add up unless NAND prices retreat sharply from today's levels.

• NBM Floor Pricing: Sandisk's contracted floor prices are estimated to sit 26% to 28% below its 4Q26 realized ASP, implying a floor gross margin of roughly 78% to 79%, close to the "around 80%" figure CFO Luis Visoso cited at Investor Day against a reported 4Q26 gross margin of 84.6%.
• Contracted Revenue Coverage: Eight strategic customers have signed agreements guaranteeing a minimum $94 billion of revenue over four years at floor prices, covering roughly half of FY27 bits and two-thirds of FY28 bits, with fixed, variable, floor, ceiling, and volume terms.
• Growth-Margin Contradiction: Management's mid-to-high-teens revenue growth outlook is framed on bit growth with flat ASPs, yet the report calculates that holding an approximately 80% average gross margin would require ASPs to fall more than 30% from current levels, meaning blended pricing would need to reach NBM floors by FY28 for the model to reconcile.
• Margin Math That Doesn't Close: If FY28 opens with an 84% gross margin, as one reading of management's framework implies, hitting an 80% three-year average would require subsequent margins to fall below 80%, meaning either NBM floors fail to hold or non-NBM pricing drags the blended result under the floor.
• Downside Earnings Scenarios: In a modeled case where non-NBM ASPs fall 50% by 4Q29 and NBM ASPs hit their floor, FY29 gross margin falls to 78% and EPS to $218; if NBM floors are also breached and both NBM and non-NBM ASPs fall 50% versus 4Q26, gross margin drops to 72% and EPS to $154.
• Trough Valuation Modeled: Applying an 8x P/E, one turn above Sandisk's cited 7x forward multiple, to its downside earnings scenarios, the report models a trough share price of $1,200 to $1,700 in mid-2028, against a cited current price of $1,485.
• Extreme Price Sensitivity: The report cites sell-side supply/demand models showing a mid-single-digit percentage bit deficit was enough to push NAND ASPs up roughly four-fold over the prior year, and infers a similarly sized surplus could produce a comparable collapse, underscoring how small forecasting misses can swing outcomes.
• Catastrophic-Case Threshold: A "truly disastrous" sub-$100 FY29 EPS outcome would require an estimated 75% peak-to-trough ASP decline, roughly 40 percentage points beyond the report's assumed 60% to 65% decline in its downside scenarios, and would likely need weak demand alongside aggressive wafer-capacity expansion.

Catalysts

• Additional NBM signings above current coverage: No date given; would reduce spot-price exposure if contracted bit coverage rises beyond roughly half of FY27 and two-thirds of FY28.
• FY28-FY30 execution against growth and pricing framework: Begins FY28; would test whether management's mid-to-high-teens bit growth and flat-ASP model reconciles as presented.
• NAND supply-demand balance through FY28: Ongoing through FY28; deficit versus surplus should determine whether gross margin remains in the mid-80% range or compresses toward NBM floors.
• Incumbent capacity additions from SK Hynix, Samsung, and Kioxia: 2027 through 2029 or later; adds industry wafer supply and could pressure pricing if demand growth lags.
• YMTC's initial 50,000 wafers-per-month increment: Expected operational in 2027; first phase of a planned 300,000 wafers-per-month expansion that could increase industry capacity by roughly 20% if fully realized.
• AI-related NAND demand growth: Sandisk projects a 1 zettabyte installed base by 2030 from KV-cache offload and persistent agentic memory, making demand trajectory a key swing factor for oversupply risk over the next two to three years.

Company Response

Not addressed in the source report.

Notable Details

• The report characterizes the historical base rate for long-term agreements succeeding in cyclical industries as "close to zero," framing Sandisk's $94 billion NBM structure as an unusually large attempt to override that pattern.
• Sandisk stock jumped more than 40% after its 2026 Investor Day, then gave back more than half of those gains, a reversal the author says reflects growing market skepticism of management's long-term outlook.
• Sandisk reportedly no longer discloses its cost-down cadence, which the report says is intended to prevent customers from feeling entitled to share in manufacturing cost savings.
• China's YMTC holds an estimated 200,000 wafers per month of capacity, roughly 15% of industry share, and plans three new predominantly NAND fabs totaling 300,000 wafers per month, positioning it as the largest wildcard in future NAND supply.

"The long-term model as presented is a piece of investor marketing material that should be de-emphasized because actual performance will either be better or materially worse."

Bristlemoon Capital uses the line to argue Sandisk's FY28-FY30 guidance masks a binary outcome: a persistent shortage could produce better results, while an oversupply scenario could break the model's assumptions.

FAQs

What is Sandisk (SNDK) being scrutinized for in this report?

The scrutiny centers on whether Sandisk's FY28-FY30 target of roughly 80% gross margin is achievable under the flat-ASP, mid-to-high-teens bit growth framework management has presented, or whether it actually requires NAND prices to fall toward the floor levels set in the company's own customer contracts. The report treats this as an internal inconsistency in the model rather than a confirmed fact.

What is Sandisk's New Business Model (NBM) and why does it matter?

Sandisk's NBM refers to eight long-term agreements signed with strategic customers, guaranteeing a minimum $94 billion of revenue over four years at floor prices, covering roughly half of FY27 bits and two-thirds of FY28 bits. The structure is meant to reduce exposure to NAND's historical boom-bust price cycles by locking in volume and pricing terms years in advance.

What does Bristlemoon Capital allege about Sandisk's margin model?

Bristlemoon Capital's report argues that Sandisk's stated 80% gross-margin target only reconciles with the company's flat-ASP growth assumptions if blended pricing falls to NBM floor levels, an estimated 26% to 28% below Sandisk's 4Q26 realized ASP, by FY28. The firm characterizes the long-term model as investor marketing rather than a reliable forecast.

How much could Sandisk's stock fall if NAND prices decline sharply?

Bristlemoon Capital's downside scenarios model FY29 EPS of $218 under a case where non-NBM prices fall 50% by late 2029 while NBM prices merely hit their floor, and $154 if NBM floors are also breached. Applying an 8x P/E to those outcomes, the report's modeled trough share price range is $1,200 to $1,700 in mid-2028, versus a cited $1,485 price at the time of the report.

Why did Sandisk stock rise then fall after its 2026 Investor Day?

Sandisk shares initially rose more than 40% following the Investor Day presentation of its NBM agreements and long-term financial model, then gave back more than half of that gain. The report attributes the reversal to growing investor skepticism about whether the underlying margin and growth assumptions hold together.

Could a NAND shortage actually make Sandisk's results better than projected?

Yes, according to the report: if NAND remains in a supply deficit through FY28, the author states there is "no reason to believe" gross margin would not stay in the mid-80% range, above the company's own 80% target. The report frames this as one side of a binary outcome, with oversupply representing the other, more severe, side.

What role does AI demand play in the NAND supply outlook?

Sandisk estimates that AI-driven demand for KV-cache-offload storage could reach a 1 zettabyte installed base by 2030, which the report estimates could absorb a high-teens percentage of industry bit supply over four years. Combined with persistent agentic memory demand, this is cited as a reason oversupply may be less likely over the next two to three years, though the estimate excludes potential demand from AI-generated video storage.

Who are the biggest risks to Sandisk's NAND pricing power?

The report names SK Hynix, Samsung, and Kioxia as incumbents with announced capacity expansions expected online between 2027 and 2029 or later, and identifies China's YMTC as the largest wildcard, with plans for three new fabs totaling 300,000 wafers per month, a roughly 20% increase in industry wafer capacity if fully built.

Disclaimer: This summary is not primary research and does not constitute investment advice. It is a brief overview of a detailed equity research report authored by the firm, organization, or source referenced in this article or at https://www.bristlemoonresearch.com/p/making-sense-of-sandisks-long-term, which contains extensive evidence, regulatory filings, and analysis; readers are encouraged to review the full report there for a comprehensive understanding. The content provided in this publication is not authored or originated by us — we act solely as a distributor and do not endorse, verify, or take responsibility for the accuracy, completeness, or reliability of the information presented. This publication is for informational purposes only and should not be construed as legal, business, investment, or tax advice. Always conduct independent due diligence and consult qualified professionals before making any decisions based on the information contained herein. We disclaim all liability for any loss or damage arising from reliance on third-party content, and the views expressed are solely those of the respective source and do not necessarily reflect our own.