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SanDisk (SNDK): A Breakout Move With Real Fundamentals

Most investors have been locked on Nvidia. Some have been watching Micron. Very few were watching SanDisk at the start of this year.

That blind spot has gotten harder to ignore.

Quick accuracy note (with dates, so we’re not hand-waving): the last widely posted closes I can verify in public market-data sources show SNDK around $1,410 on May 6, 2026, and roughly $1,340 on May 8, 2026. So the “near $1,562 as of May 9” line in the prior draft looked stale or simply off by a lot.

Even using those lower closes, the bigger point holds: SanDisk (NASDAQ: SNDK) is still sitting at the top of the Nasdaq-100 leaderboard for 2026 year-to-date performance in multiple index/performance trackers. The move has been violent. And it’s not coming out of nowhere.

The numbers that changed the conversation

SanDisk’s fiscal Q3 2026 report (released April 30, 2026, quarter ended April 3, 2026) was one of those prints that forces people to update their assumptions. Not “interesting” – unavoidable.

Here are the key figures the company reported for fiscal Q3 2026:

• Revenue: $5.95B (up 251% year over year)
• GAAP gross margin: 78.4%
• GAAP net income: $3.615B (about $23.03 diluted EPS)
• Non-GAAP diluted EPS: $23.41

And the guidance didn’t try to cool anybody down.

For fiscal Q4 2026, SanDisk guided to:

• Revenue: $7.75B to $8.25B
• Non-GAAP gross margin: 79% to 81%
• Non-GAAP diluted EPS: $30 to $33

Slight tangent, but it matters: when a company can put up margins like that in a business everyone calls “cyclical,” it usually means the cycle is being driven by something bigger than normal PC refreshes. In this case, it’s data center demand colliding with constrained supply. Old rules still apply, but they’re coming with a delay.

Why AI keeps pulling storage into the spotlight

People love the “chips” part of AI because it’s visible. The GPUs have the brand names. They have the headlines.

What’s less visible is that modern AI systems don’t just compute – they move and store a ridiculous amount of data. Training is heavy. Inference is constant. And when enterprises start building agent-like workflows, they keep needing fast access to growing datasets. That’s storage being treated like infrastructure, not a discretionary upgrade.

Then you layer in the pricing side. Gartner’s most recent semiconductor outlook (released in April 2026) specifically called out “memory price inflation” and estimated that 2026 NAND flash annual average prices could rise as much as 234% (with meaningful relief not expected until late 2027). If that’s even directionally right, it’s a tailwind that doesn’t show up politely – it shows up all at once.

This is also why the analyst community moved quickly after the Q3 report. Susquehanna, for example, raised its target to $2,000 (from $1,000) while maintaining a positive view. Not every shop is that aggressive, but the direction of travel has been consistent: higher estimates, higher targets, more attention.

Two things I’d watch before getting too comfortable

1) Margin durability. A 78% gross margin is a loud signal. It’s also an easy target for mean reversion if supply catches up faster than expected, or if big buyers get their negotiating leverage back. The market loves a peak margin… right up until it decides it was peak margin.

2) Share overhang and forced flows. SanDisk officially joined the Nasdaq-100 effective April 20, 2026. Index inclusion can create mechanical buying, which is supportive on the way up. But it can also make the stock feel “crowded” fast. Add any remaining stake-related selling dynamics from Western Digital and you can get air pockets on down days.

None of that invalidates the story. It just means you don’t want to treat this like a straight line.

If you’re keeping a watchlist, SNDK is worth keeping near the top – not as a reflexive “buy,” but as a real-time read on whether AI demand is spreading beyond compute into the less glamorous, highly profitable parts of the stack.

Worth a closer look this week, especially if you’re seeing any signs that memory pricing is staying tighter for longer.