Shares of Micron Technology (NASDAQ:MU | MU Price Prediction) are leading the memory complex sharply higher in midday trading, rallying 16% on the session after UBS analyst Timothy Arcuri delivered one of the most aggressive sell-side revisions of the AI cycle. The move has rippled across the sector as investors reprice every name tied to memory and storage.
SanDisk (NASDAQ:SNDK) shares are up 7% and Western Digital (NASDAQ:WDC) shares are up 9% midday. The trio represents the three pillars of AI-era storage: DRAM and HBM at Micron, NAND flash at SanDisk, and high-capacity HDDs at Western Digital.
UBS’s Massive Micron Upgrade Sets the Tone
UBS lifted its Micron price target from $535 to $1,625, arguing that long-term memory supply agreements will lock in pricing and demand visibility across the industry. The firm expects EPS to exceed $100 at least until 2029, reframing Micron from cyclical commodity producer to durable AI infrastructure play.
Arcuri wrote: “We believe the market will start to put a more ‘normal’ multiple on the stock, and MU will continue to re-rate higher as more details emerge about the structural changes AI has driven to the entire memory complex.” Sell-side coverage already skews positive, with 39 of 44 firms rating MU stock Buy or higher, four Hold, and one Sell.
Micron’s most recent quarter, detailed in its SEC filings, delivered revenue of $13.64 billion, up 57% year over year (YoY), with Cloud Memory Business Unit revenue of $5.28 billion nearly doubling. Micron stock is up 839% over the past year.
SanDisk Rides the NAND Tailwind
SanDisk is the NAND pure-play that spun out of Western Digital in February 2025, and it has become arguably the most explosive AI-era winner in storage. SNDK shares are up 3,808% over the past year, capturing both the separation catalyst and an enormous datacenter inflection.
SanDisk’s Q3 FY2026 results, filed April 30, showed revenue of $5.95 billion (up 251% YoY) with datacenter revenue of $1.47 billion, up 645% YoY. CEO David Goeckeler described the period as “a fundamental inflection point for Sandisk where our technology leadership is enabling a deliberate shift in our mix toward the highest-value end markets, led by Datacenter.”
If UBS is right that AI-driven supply agreements give memory durable pricing power, NAND flash sits squarely in that thesis. SanDisk’s recently authorized share repurchase program and zero-debt balance sheet give it room to lean into the cycle.
Western Digital and the Data Center Storage Bid
Western Digital is the post-spinoff HDD franchise, and its participation in today’s move reflects a parallel storage story. AI workloads generate enormous volumes of persistent data stored most cost-efficiently on high-capacity drives, not flash. WDC stock is up 208% year to date.
Western Digital’s Q3 FY2026 results showed revenue of $3.34 billion, non-GAAP gross margin that crossed 50% for the first time, and non-GAAP EPS of $2.72, the fourth consecutive beat. Management also raised the dividend 20% to $0.15 per share and repurchased $752 million of stock during the quarter.
Western Digital CEO Irving Tan asserted, “Virtually every AI workload, from training, inference, agentic AI to physical AI, creates data that is stored persistently and cost-efficiently on HDDs.” That demand framing mirrors the secular argument UBS extended to the DRAM side.
The Honest Caveats
Memory has historically been one of the most cyclical corners of semiconductors, and the bullish thesis that AI permanently rewires that pattern remains unproven across multiple cycles. The Micron stock rerating may prove correct, but it relies on supply agreements materializing as UBS describes.
Short interest in MU shares has reportedly been rising even as analyst targets climb, and insider activity skews heavily toward selling, with 48 disposal transactions concentrated on May 1 across the CEO and multiple executives. SanDisk stock’s 4,155% one-year move also means the bar for further upside is meaningfully higher than it was 12 months ago.
What to Watch
The most actionable tells over the next few weeks could be whether other sell-side firms follow UBS with upgrades on Micron, SanDisk, or Western Digital, and whether any discloses concrete long-term supply agreements validating the durability thesis. Prudent investors may want to scale exposure carefully given how far the complex has already moved.
The next earnings prints for each name will test whether AI-era pricing power is showing up in guidance, or whether the rerating has front-run the fundamentals. Analyst follow-through and momentum flows could keep the memory melt-up active.
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