SanDisk's Record Margins and a Questionable Bid Collide as Supply Squeeze Intensifies

SanDisk's rally faces tests from a mini-tender offer, a Samsung strike, and hot inflation data, while NAND supply shortages and AI demand continue to drive earnings.

A perfect storm of operational tailwinds and macro headwinds is buffeting SanDisk this week. The memory-chip maker has seen its shares soar more than 410% since January, driven by a severe NAND supply crunch and surging demand from AI data centers. Yet three distinct events — an unwanted takeover bid, a looming strike at a key rival, and stubbornly hot US inflation data — are testing whether the rally can hold.

The most immediate threat to the stock's momentum is a mini-tender offer from Tutanota LLC, which is seeking to buy up to 100,000 shares at $1,150 apiece — well below Friday's close of $1,407.61. The offer is conditional on SanDisk's closing price staying above that level on the final trading day before expiry, but the company's board has urged shareholders to reject it. Such mini-tenders target less than 5% of outstanding shares and bypass SEC disclosure rules designed to protect investors. The deadline falls on Wednesday, and anyone who has already tendered has the right to withdraw.

Far more consequential for the business is the supply-side picture. After NAND contract prices surged as much as 90% in the first quarter, analysts expect a further 70–75% jump in the current quarter. The reason: memory makers have been shifting capacity toward high-bandwidth memory used in AI accelerators, starving the NAND supply chain. That dynamic is about to get an additional boost. Samsung Electronics' labor union has called an 18-day strike starting May 21, threatening roughly 3% of global memory chip output. Any disruption at the world's largest memory manufacturer would force buyers to scramble for spot inventory, pushing prices even higher.

SanDisk's financials already reflect this pricing power. Revenue rocketed 252% in its most recent quarter, and gross margins hit an extraordinary 78.4%. The company is targeting around $8 billion in sales and 80% gross margins by the fourth quarter, underpinned by growing demand from hyperscale data centers. Earlier this month, it unveiled a new server configuration alongside Kioxia and Dell that packs 9.8 petabytes of flash storage into a compact format, slashing power consumption by a factor of eight compared with conventional systems — a compelling pitch for energy-conscious AI operators.

That operational strength has attracted top-tier institutional interest. David Tepper's Appaloosa Management accumulated a position during the first quarter. But some insiders have been selling, and the full extent of those disposals has yet to be disclosed. On Wall Street, Bernstein recently lifted its price target to $1,700, betting that the demand cycle has further to run.

Yet the stock's rally has pushed its relative strength index (RSI) to nearly 80, a level that historically signals an overheated market. A first technical resistance sits at around $1,448, while support lies close to the current trading level. The macroeconomic backdrop has also turned less supportive after US consumer price data came in higher than expected, all but extinguishing near-term rate-cut hopes and pressuring richly valued growth stocks.

The coming days will provide a clearer direction. Wednesday's expiry of the Tutanota offer removes one source of noise. Thursday's scheduled start of the Samsung walkout could either cement the supply narrative or, if a last-minute deal averts the strike, expose SanDisk's lofty valuation to a swift correction. Meanwhile, quarterly results from major analog chipmakers, the release of Federal Reserve minutes, and global purchasing managers' indexes will help determine whether fears over interest rates or the AI-driven storage boom ultimately wins the tug-of-war.