SNDK Bounces 8.8% on Seagate's AI Storage Blowout, One Day Before Q3 Earnings

Seagate Reset the Tape

The catalyst is one ticker over. Seagate's fiscal Q3 print after the close on Tuesday was the kind of release that changes how the buyside frames an entire sector. STX posted non-GAAP EPS of $4.10 versus a $3.48 consensus, revenue of $3.1B at 44% year-over-year growth, and non-GAAP operating margin of 37.5% — up 560 basis points sequentially. The June-quarter guide is what really moved the tape: revenue of $3.45B at the midpoint (41% YoY) and non-GAAP EPS of $5 against a Street that sat below $4.

CEO Dave Mosley used the call to reset the long-term frame, describing 'a new era of structural growth as AI applications amplify data creation and support sustained storage demand,' and raising Seagate's own annual growth target to a minimum of 20% from the prior low-to-mid teens. STX itself opened roughly 17.8% higher on the print. The read-through dragged the entire storage and memory complex with it — Sandisk through Micron — and reversed Tuesday's OpenAI-driven selloff inside a single session.

The NAND Read-Through

Hard drives and NAND are not the same product, but the demand signal is fungible. The Tuesday-into-Wednesday whipsaw was less about Sandisk fundamentals and more about which narrative was winning: the Wall Street Journal report on OpenAI missing its own user and revenue targets had traders pricing in a fragile AI capex cycle. Seagate's print is the cleanest counter-data point available — actual storage demand from actual hyperscalers, with margin expansion to match.

The NAND tape supports it. Third-party tracker data has NAND average selling prices up roughly 90% in the March quarter and another 70% to 75% in Q2 2026, driven by hyperscaler buying that is starting to crowd out client demand. Sandisk's own datacenter segment grew 64% sequentially last quarter to $440M, and management has guided fiscal Q3 gross margin of 65% to 67% versus Q2's 51.1% — an unusually steep step-up that only works if pricing is doing what trackers say it is doing. BofA's Wamsi Mohan calls it a 'secular opportunity as AI inference makes NAND more indispensable'; Seagate just handed that thesis a quarter of empirical cover.

Tomorrow's Earnings Are the Real Test

Sandisk reports fiscal Q3 after the close on Thursday, April 30. Consensus sits at $4.69B in revenue and $14.45 in EPS — versus a $0.30 loss a year ago — and the company's own guidance range of $4.4B to $4.8B already puts the buyside near the high end. The Street has spent the last week stair-stepping price targets up: Morgan Stanley to $1,100, BofA to $1,080, Evercore initiating at $1,200, Bernstein at $1,250 with a $3,000 blue-sky case, and Melius at $1,350.

That is a setup with very little forgiveness baked in. The stock is trading at all-time highs on the HIP-3 perp, options-implied vol is elevated into the print, and the positioning into yesterday's OpenAI-driven flush already showed how quickly profit-taking flips on this name. A clean revenue beat with gross margin at the upper end of the 65% to 67% range — paired with a June-quarter guide that telegraphs continued NAND ASP strength — is roughly the floor for what holds the stock here. Anything softer on either dimension, into a tape this crowded, hands the market a fresh excuse to recycle Tuesday's selling.

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