Sandisk, Western Digital, and others soar as Micron results 'justify elevated valuations'
What happened
Micron's blowout results — $37.4B revenue, +48.9% YoY, 39.8% gross margins — are lifting the entire memory sector with analysts citing 'justified elevated valuations.' Western Digital and Sandisk are the direct read-through plays, both riding the same HBM/NAND demand wave that drove Micron's beat.
The read · Jun 26
WDC and SNDK are rallying on Micron's read-through, but the question is whether WDC's clean 50%+ revenue growth and positive EPS justify a sustained re-rate versus SNDK's negative net margins and restructuring drag.
Wrong if
If the memory upcycle narrative strengthens further, low-quality names like SNDK can outperform on short-squeeze dynamics; SNDK's spin-off novelty also attracts speculative flows that could blow out the short leg.
CoverageSource: Yahoo Finance · Published here FRI, JUN 26 · 11:25 PM ET · 2 outlets in this record · latest listed: Yahoo Finance at 11:25 PM ETHow this is decided →
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The story1 min read
Micron reported fiscal 2025 revenue of $37.4B (+48.9% YoY) with 39.8% gross margins and $7.59 diluted EPS, a print strong enough to prompt analysts to argue that premium valuations across the memory complex are now supported by fundamentals. The results reflect sustained AI-driven demand for HBM and data-center NAND, and traders immediately rotated into the two closest comps: Western Digital (WDC) and the recently spun-out Sandisk (SNDK).
Western Digital posted its own impressive FY2025: $9.5B revenue (+50.7% YoY), 38.8% gross margins, and $5.12 diluted EPS — a trajectory nearly mirroring Micron's recovery. WDC is the cleaner secondary beneficiary: it has positive net income, comparable gross margins, and direct exposure to the same enterprise SSD and HDD upgrade cycle that is lifting the whole sector.
Sandisk is the more complicated story. Freshly spun out from Western Digital, it posted $7.4B in revenue but only +10.4% YoY growth, 30.1% gross margins, and a deeply negative net margin of -22.3% with -$11.32 diluted EPS. The spin-off carries restructuring costs and standalone overhead that depress earnings, meaning it is riding the sector halo more on sentiment than on its own fundamental trajectory.
The key question going forward is whether the AI-driven memory upcycle has legs into 2026 or whether the sector is now fully priced after a 50%+ revenue surge. Inventory normalization, China export restrictions, and capex discipline at hyperscalers are the main variables that could reverse the trade. Micron's next quarterly guide and WDC's upcoming earnings call are the nearest catalysts to watch.
The read, in fullWhy it matters
WDC's FY2025 shows 50.7% revenue growth, 38.8% gross margins, and positive $5.12 EPS — a fundamental profile nearly identical to Micron's that 'justifies elevated valuations.' SNDK by contrast has negative net margins (-22.3%) and -$11.32 EPS, meaning its rally is sentiment-driven on the sector halo rather than its own earnings power. A long WDC / short SNDK pair captures the re-rate in the higher-quality name while hedging against a broad memory sector reversal.
The arc● Open · no developments yet
· Published
The read above, as written. kept as written · closes shown from JUN 29 on
Next · what would move this
4-6 weeks, into WDC next earnings. Follow to be told when one lands.
Since this story · named here, equal weight · 1D EOD-18.2%
JUN 29 · first close after publicationSEP 4
Price context does not establish that the story caused the move.
▲ The case it holds
WDC's 50.7% revenue growth and 38.8% gross margin — near-identical to Micron's celebrated print — give it a concrete fundamental anchor for a sustained valuation re-rate alongside the sector leader.
▼ The case it breaks
Memory sector valuations are now consensus-elevated after the Micron halo, meaning the easy re-rating trade is already in the price and further upside requires an additional positive earnings surprise rather than just sector sympathy.
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The memory
This page is kept as it was written on Jun 26. Later coverage joins it only when the company and catalyst evidence match, and what the stock did is shown from licensed end-of-day closes — never re-graded, never backdated. The judgment is yours.