---
title: "Sandisk and Kioxia bet $31 billion on AI storage demand, and Sandisk owes half the fixed costs"
description: "Kioxia and Sandisk have pledged six years of NAND fab spending on the strength of an AI demand decade. Sandisk trades 43 percent below its peak and reports on October 29 into slowing price gains."
publisher: "The Inference"
section: "Silicon"
published: 2026-10-15T15:22:53.155Z
modified: 2026-10-15T15:22:53.155Z
canonical: https://theinference.org/article/sandisk-and-kioxia-bet-31-billion-on-ai-storage-demand-and-sandisk-owes-half-the-fixed-costs
language: en
keywords: "NAND, Memory, Sandisk, Kioxia, AI Infrastructure, Japan"
---

# Sandisk and Kioxia bet $31 billion on AI storage demand, and Sandisk owes half the fixed costs

> Kioxia and Sandisk have pledged six years of NAND fab spending on the strength of an AI demand decade. Sandisk trades 43 percent below its peak and reports on October 29 into slowing price gains.

## Six years of money against one bad week

Kioxia, the world's third-largest NAND flash maker, and its joint-venture partner [Sandisk](https://theinference.org/markets/companies/sandisk) [said on August 27](https://www.aol.com/articles/kioxia-sandisk-invest-over-31-113900000.html) they would spend more than ¥5 trillion, about $31 billion, on their Japanese fabs through 2032, contingent on government support [1][2]. NAND flash is the storage AI datacenters buy, and both companies expect AI-driven demand to last a decade or more [3][2].

The venture's terms decide who bleeds if the bet misses. Kioxia runs the fabs day to day; Sandisk owns 49.9 percent of each Flash Ventures entity, buys about half the wafers at cost plus a small markup, and [owes half the fixed costs whether or not it takes them](https://theinference.org/article/sandisk-sold-its-flash-future-for-93-9-billion-then-bet-31-billion-on-more-fabs) [3][4].

Seven weeks later the sellers arrived. Sandisk fell 6 percent on Monday October 12 even as S&P raised it to investment grade, BBB from BB+, on a forecast that fiscal 2027 free cash flow would top $23 billion, an upgrade The Inference reported on October 13 [5][6]. That forecast and the ¥5 trillion plan rest on the same demand decade.

## Two-thirds of the ¥5 trillion has no home

Only one project in the envelope is public: [a third fab at Kitakami in Iwate Prefecture, about ¥1.8 trillion ($11.3 billion), with output targeted for fiscal 2029](https://www.asahi.com/ajw/articles/16843810) [3][1]. Roughly two-thirds of the money has no named home, and Kioxia has disclaimed reports of a further new plant [3].

The rest waits on politics. Kioxia chief executive Hiroo Ota expects Tokyo to cover about one-third of the total; the government has decided ¥243 billion so far, and Prime Minister Sanae Takaichi's welcome carried no figure and no date [3][1].

Rivals are building on the same assumption: [Micron](https://theinference.org/markets/companies/micron)'s $24 billion Singapore fab started construction in January, and [SK Hynix](https://theinference.org/markets/companies/sk-hynix) begins a 680,000-square-meter plant at Cheongju in February 2027 [3].

Sandisk's share of the bill arrives before any new fab opens. Its Flash Ventures cash commitments for fiscal 2027 total $2.627 billion, against $177 million of its own equipment spending in fiscal 2026, with capital spending guided to about 6 percent of revenue [4].

*Chart: **The boom the $31 billion bet rests on: revenue up nearly fivefold in eight quarters** Line chart of Sandisk quarterly revenue rising from $1.88 billion to $8.97 billion over eight quarters, with a guided $10.55 billion next quarter*

*Quarterly revenue in $ billions, calendar-quarter labels mapped to Sandisk fiscal periods; Q3 '26 is the midpoint of August 5, 2026, guidance for fiscal Q1 2027 (range $10.3 to $10.8 billion), drawn as an estimate. Reported quarters from SEC filings. [10][7]*

## The selloff's exhibit is a claim without numbers

The boom the plan leans on is real on paper. [Fiscal 2026 revenue was $20.25 billion, up 175 percent](https://www.sec.gov/Archives/edgar/data/2023554/000162828026053346/sndkq4-26ex991xpressrelease.htm), and the final quarter added 51 percent sequentially at an 84.6 percent gross margin [7][4].

The bear case runs on thinner evidence. ChangXin Memory Technologies, China's leading DRAM maker, [told a Shanghai conference on October 9 and 10](https://www.scmp.com/tech/tech-trends/article/3370739/why-samsung-sk-hynix-and-cxmt-shares-are-under-pressure-despite-strong-ai-demand) that it had laid groundwork for a 4F² design, a denser layout that shrinks the memory cell by about a third, promising server DDR5 modules by year-end with no yields, specifications or process disclosed [5][8]. [Western Digital](https://theinference.org/markets/companies/western-digital), which makes no DRAM, fell 6.19 percent premarket on the claim [8].

[Morgan Stanley](https://theinference.org/markets/companies/morgan-stanley)'s Shawn Kim wrote that "the easy money is past," though the bank still expects memory prices to hold firm through 2027 [5]. [TrendForce forecasts NAND contract-price increases of 10 to 15 percent this quarter](https://theinference.org/article/wall-street-prices-nand-scarcity-through-2028-while-ymtc-builds-toward-samsung-s-scale), down from 70 to 75 percent last quarter [4]. The sellers have voted on that slowdown already: Sandisk trades 43 percent below its peak, Micron 30 percent, SK Hynix 57 percent [9].

*Chart: **The sellers have already voted: memory leaders 30 to 57 percent below their peaks** Bar chart of drawdowns from 2026 peaks: Micron down 30 percent, Sandisk down 43 percent, SK Hynix down 57 percent*

*Percent below 2026 closing peaks, as reported October 15, 2026. [9]*

## One date is on the calendar; Tokyo's is not

Sandisk, under chief executive [David Goeckeler](https://theinference.org/markets/people/david-goeckeler), reports on October 29 [against guidance of $10.30 to $10.80 billion in revenue and an 83 to 85 percent gross margin](https://drillr.ai/article/sndk-sandisk-q1-fiscal-2027-earnings-preview-nand-pricing-nbm), with $59.8 billion of contracted future revenue on the books [4][7]. Samsung's full results land the same day, carrying the 2027 supply picture [5].

Tokyo's subsidy decision, the trigger for the unspent two-thirds, has no date [3]. If the decade arrives, Kioxia and Japan's industrial policy own the new capacity; if it stalls, Sandisk's shareholders still owe half the fixed costs [4]. The builders and the sellers are reading the same demand curve, six years apart.

## Takeaway

Kioxia and Sandisk have committed $31 billion of NAND fab spending through 2032 on an AI demand decade, but Sandisk owns 49.9 percent of the venture, buys half the wafers and owes half the fixed costs, so its shareholders carry the downside while Tokyo's subsidy decision, the trigger for the unspent two-thirds of the plan, has no date.

## Sources

1. [The Asahi Shimbun, "Kioxia-Sandisk venture to spend 1.8 trillion yen on new chip factory", 28 August 2026](https://www.asahi.com/ajw/articles/16843810)
2. [Kioxia and Sandisk joint press release via Business Wire/AOL, "Kioxia and Sandisk to Invest Over $31 Billion in Japan, Extending Leadership in Memory Industry", 27 August 2026](https://www.aol.com/articles/kioxia-sandisk-invest-over-31-113900000.html)
3. [Chip Dispatch, Tom Whitfield, "Kioxia and Sandisk Plan $31B NAND Expansion in Japan", 12 October 2026](https://chipdispatch.com/articles/kioxia-and-sandisk-plan-31-billion-japan-nand-expansion-1178fd16)
4. [drillr, "[SNDK] Sandisk: Q1 fiscal 2027 earnings preview as NAND price gains slow", 3 October 2026 (compiling Sandisk 10-K filed 17 August 2026 and Q4 FY2026 disclosures)](https://drillr.ai/article/sndk-sandisk-q1-fiscal-2027-earnings-preview-nand-pricing-nbm)
5. [South China Morning Post, "'Easy money is past': why investors are rethinking the AI memory-chip trade", 15 October 2026](https://www.scmp.com/tech/tech-trends/article/3370739/why-samsung-sk-hynix-and-cxmt-shares-are-under-pressure-despite-strong-ai-demand)
6. [MoneyCheck, "SanDisk (SNDK) Stock: S&P Cites AI Memory Demand in Rating Upgrade", 13 October 2026](https://moneycheck.com/sandisk-sndk-stock-sp-cites-ai-memory-demand-in-rating-upgrade/)
7. [Sandisk Corporation, Form 8-K Exhibit 99.1, "Sandisk Reports Fiscal Fourth Quarter 2026 Financial Results", 5 August 2026](https://www.sec.gov/Archives/edgar/data/2023554/000162828026053346/sndkq4-26ex991xpressrelease.htm)
8. [Trend & Ticker, "Western Digital stock drops 6% premarket on CXMT DRAM news", 13 October 2026](https://trendandticker.com/markets/semiconductors/western-digital-wdc-falls-premarket-cxmt-dram-claim)
9. [Omni, "Ekonomi" (citing Dagens industri on Micron, Sandisk and SK Hynix drawdowns from peak), 15 October 2026](https://omni.se/ekonomi)
10. [Sandisk, quarterly figures from its SEC filings, retrieved 15 October 2026](https://www.sec.gov/cgi-bin/browse-edgar?action=getcompany&CIK=0002023554)


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Sandisk and Kioxia bet $31 billion on AI storage demand, and Sandisk owes half the fixed costs — The Inference. Canonical: https://theinference.org/article/sandisk-and-kioxia-bet-31-billion-on-ai-storage-demand-and-sandisk-owes-half-the-fixed-costs