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SanDisk Earnings Reveal an AI Storage Supercycle: Data Center Revenue Surges 645%, NAND Demand 10 Times Supply?

SanDisk's latest earnings report shows that data center revenue reached $1.47B in the third quarter of fiscal 2026, surging 645% year on year and rising 233% quarter on quarter, accounting for 24.7% of total revenue. [1] This figure means that AI data centers' demand for NAND flash is racing ahead at 3.7 times the industry's average growth rate, and the storage supercycle has shifted from expectation to reality.

On August 12, SanDisk released its third-quarter fiscal 2026 earnings report. After years of sluggishness in the global memory chip market, the AI data center construction boom has elevated NAND flash from a cyclical consumer electronics product to a core component of computing infrastructure. A single AI server consumes 3 to 8 times as much NAND flash as a traditional server, while the storage demand for training a GPT-5-level model is more than 10 times that of GPT-4. [2]

　 I. Why Are AI Data Centers Devouring NAND Flash?

　　Conclusion: AI training and inference require massive data storage. A single AI server consumes 3-8 times as much flash as a traditional server, making storage the core bottleneck second only to GPUs.

　　The training and inference of large language models depend on massive data throughput, and NAND flash is precisely one of the most critical components of the AI data center storage architecture. Training a GPT-5-level model requires more than 10 times the data storage of GPT-4. Every data center expansion means that NAND demand jumps to a new level. By the second half of 2025, NAND flash prices had risen more than 300% from their trough. [1]

　　Elon Musk pointed out on social media: “Memory production grows by about 20% each year. But demand grows by 200% or more each year. When demand grows far faster than supply, basic economic principles tell us that prices should rise, not fall.” [3] Demand growth is 10 times supply growth—this is the hardest underlying logic of the AI storage supercycle.

　II. How Is SanDisk Turning Short-Term Strength Into $42 Billion of Long-Term Certainty?

　　Conclusion: Through long-term NBM (new business model) agreements, SanDisk has locked in a minimum of $42 billion in contracted revenue, covering more than half of its shipments over the next two years.

　　Major news emerged from SanDisk's earnings call: The company has signed multiyear NBM agreements with eight top-tier customers covering the data center sector. The bit volume covered by these supply agreements will account for more than 50% of the company's total shipments in fiscal 2027 and approximately two-thirds in fiscal 2028, respectively. [2] The CEO stated emphatically: “In the past, we could only forecast demand within three months. Now we have locked-in purchase volumes and clear profit models covering more than four years.”

　　This business model transformation is also backed by financial safeguards: Customers have paid billions of dollars in collateral and must compensate the company if they fail to fulfill quarterly purchasing obligations, while a $400 million prepayment has already been recorded on the balance sheet. [2] This greatly smooths the traditional storage industry's cyclical risk of “capacity expansion-surplus-price cuts,” turning short-term strength into long-term certainty. At the same time, the reshaping of pricing power has produced significant results: Non-GAAP gross margin reached 78.4%, a historic high for the storage industry. The CEO said that the value of storage technology had been underestimated in the past and is now being “distributed more fairly.”

III. How Severe Is the Supply Bottleneck? How Long Will Prices Keep Rising?

　　Conclusion: New capacity takes more than 24 months to go from planning to mass production. Supply tightness is expected to persist beyond 2028, and prices remain on an upward trajectory, although the increases may moderate.

　　Mizuho Securities' latest report points out that AI remains the core driver of memory market demand growth. As AI servers, ASIC accelerators, and data center infrastructure continue to expand, global NAND demand is expected to grow 18% for two consecutive years in 2026 and 2027. [4] But supply is severely lagging: New capacity typically takes more than 24 months to go from planning to mass production, leaving limited additional capacity in the short term.

　　In terms of prices, according to TrendForce data, the average price of NAND dies rose 55-90% quarter on quarter in Q1 2026, with the increase widening to 70-75% in Q2, while Q3 contract prices are still expected to rise 10-15% quarter on quarter. [5] However, consumer customers have reached the limit of their price tolerance as demand slows, and contract prices have reached historic highs, so future increases may moderate further.

IV. How Long Can the Storage Supercycle Last? Where Are the Risks?

　　Conclusion: Long-term agreements provide high certainty, but weak consumer demand and the gap between capital market expectations and results are the main risks.

　　Although SanDisk's earnings figures were impressive, its guidance disappointed some investors, and the company's stock price plunged in after-hours trading in the U.S. [3] This reflects the market's differing views on the persistence of the storage cycle: On the one hand, AI-driven high growth appears irreversible; on the other hand, weak consumer electronics demand and high prices may suppress shipments in non-AI areas. Short-term fluctuations must be distinguished from long-term trends: Industry capital is locking in capacity through massive multiyear contracts, which better reflects real demand than the short-term sentiment of financial capital. [2]

　　Another risk is a “mismatch in the capacity expansion cycle.” If all storage manufacturers begin expanding capacity aggressively, excess supply could emerge after 2028. For now, however, Musk's claim that “demand is growing 10 times faster than supply” is the market consensus, and the supercycle can last at least until 2028.

V. Which Key Indicators Should Investors Watch?

　　Conclusion: The key metrics to track are data center revenue growth, NBM agreement coverage, and changes in NAND contract prices.

Data center revenue growth: SanDisk's quarterly growth rate is 645%, versus an industry average of approximately 175%. The lead is a direct measure of the strength of the cycle.

NBM agreement coverage: More than 50% of fiscal 2027 shipments and approximately two-thirds of fiscal 2028 shipments have been locked in. A rising share in the future would mean greater certainty.

NAND contract prices: Q3 prices are expected to rise 10-15% quarter on quarter, but consumer tolerance is saturated, so investors should watch for signs that the increase is narrowing.

Gross margin: The Non-GAAP gross margin of 78.4% is a historic high. If it remains elevated, it indicates that pricing power in the industry remains in the hands of storage manufacturers.

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