A year ago, SanDisk was a freshly spun-off company trading at $28 a share. Today it trades above $620. That’s a 1,500% return in 12 months - making it the single best-performing stock in the S&P 500 in 2025, and it’s already up another 163% in 2026.

This isn’t a meme stock. This isn’t hype. This is a supply-demand imbalance so severe that it has rewritten the economics of an entire industry.

The Spin-Off

On February 24, 2025, SanDisk began trading on Nasdaq under the ticker SNDK after being spun off from Western Digital. The logic was simple - Western Digital’s hard disk drive (HDD) business and its flash memory (NAND) business had fundamentally different growth profiles, capital needs, and customer bases. Splitting them would let each company focus.

Western Digital retained a 19.9% stake in SanDisk. Before the separation, SanDisk paid a $1.5 billion dividend to its former parent. The stock opened around $28.

Nobody expected what happened next.

The Great Memory Crunch

The AI boom didn’t just create demand for GPUs. Training and running large language models requires massive amounts of high-speed storage - SSDs built on NAND flash memory. Every data center being built for AI workloads needs orders of magnitude more storage than traditional cloud infrastructure.

The problem: there is nowhere near enough NAND supply to meet this demand.

Goldman Sachs published research identifying what they called the “Great Memory Crunch” - high-bandwidth memory supply won’t ease until 2028 at the earliest. No new NAND wafer capacity is expected in 2026 or 2027. Meanwhile, demand is growing over 20% annually.

When demand grows 20%+ per year and supply is physically constrained for 2+ years, pricing power becomes extraordinary. And that’s exactly what SanDisk’s financials show.

The Numbers

SanDisk’s Q2 2026 results tell the story:

  • Revenue: $3.03 billion (up 61% year-over-year, up 31% quarter-over-quarter)
  • Gross margin: 51.1% (up from 29.9% the prior quarter)
  • Operating income: $1.1 billion (up 386%)
  • EPS: $6.20 (up 404%)

These aren’t incremental improvements. Margins nearly doubled in a single quarter because NAND pricing has shifted so dramatically in SanDisk’s favor.

The forward guidance is even more aggressive. Management is projecting Q3 revenue of $4.4 to $4.8 billion - representing 45-58% quarter-over-quarter growth. They’ve stated explicitly that the market is likely to remain more undersupplied in Q3 than it was in Q2.

For the full fiscal year 2026, EPS is projected to surge 821% year-over-year. Fiscal 2027 estimates project another 174% growth on top of that.

Where the Stock Stands Now

At around $621 per share, SanDisk’s market cap sits at roughly $91 billion. The stock hit an all-time high of $725 in early February before pulling back.

The analyst consensus is still bullish - 14 analysts rate it a Buy with zero Sells. The median price target is $690 (about 11% upside), and the highest target is $1,000 per share.

At its Investor Day, SanDisk laid out long-term targets of 20% operating margins and $1.2 billion in free cash flow at $10 billion in revenue. Given Q2’s run rate, $10 billion in annual revenue is no longer a stretch target - it’s within sight.

Why This Is Different From Previous Memory Cycles

Memory chips have always been cyclical. NAND and DRAM prices swing between shortage and oversupply, and memory stocks historically crash when the cycle turns. Every experienced semiconductor investor knows this pattern.

But there are reasons this cycle might behave differently:

AI demand is structural, not cyclical. The buildout of AI data centers isn’t a one-time event. Every major tech company - Google, Microsoft, Meta, Amazon, Apple - is committing tens of billions to AI infrastructure annually. This demand floor didn’t exist in previous memory cycles.

Supply constraints are physical, not financial. In past cycles, overbuilding caused the glut. This time, there simply aren’t enough fabrication facilities. Building new NAND fabs takes 2-3 years and billions of dollars. No new capacity is coming online until 2028.

Pricing discipline has improved. After the brutal 2022-2023 downturn, memory makers cut capital expenditure aggressively. The industry learned (at least temporarily) that flooding the market destroys value. SanDisk, now independent, has even more incentive to maintain discipline.

The Risks

The bull case is compelling, but the risks are real:

Valuation is stretched. SanDisk trades at a steep premium - Morningstar estimates a 614% premium to fair value. Even with explosive earnings growth, the current price assumes years of continued outperformance. Any disappointment gets punished severely.

Cycles always turn. The semiconductor industry has never had a shortage that lasted forever. When supply eventually catches up - and it will - NAND prices will fall, margins will compress, and the stock will re-rate lower. The question is when, not if.

Customer concentration risk. AI infrastructure spending is concentrated among a handful of hyperscalers. If any of them slow their buildout, the demand picture changes quickly.

Western Digital’s 19.9% stake. WDC has been selling down its position through secondary offerings. These large block sales create periodic selling pressure. The most recent offering was worth over $3 billion.

Competition. Samsung, SK Hynix, Micron, and Kioxia are all fighting for the same market. While the current shortage benefits everyone, competitive dynamics will reassert themselves when supply normalizes.

What Comes Next

The near-term setup remains strong. The NAND shortage is real, pricing power is extraordinary, and earnings growth is accelerating. Management’s Q3 guidance suggests the best quarter is still ahead.

But the 1,500% return already prices in a lot of this. The stock is no longer a hidden opportunity - it’s the most talked-about name on Wall Street. At $621 per share and a $91 billion market cap, SanDisk needs to keep delivering flawless execution just to justify the current price, let alone move higher.

For long-term investors, the key question isn’t whether SanDisk is a good company (it clearly is) but whether the current price already reflects the next 2-3 years of growth. Memory cycles are brutally mean-reverting, and the stocks that lead the way up often lead the way down.

The AI-driven memory supercycle is real. The question is how much of it is already in the price.

This article was written with AI assistance. Not financial advice - do your own research before making investment decisions.