SanDisk Stock Up 353% YTD on AI Storage Boom, Supply Crunch Through 2028

SanDisk shares have staged one of the most extraordinary rallies in large-cap technology, rising 353% year to date through Aug. 11, far outpacing the S&P 500's 13.19% gain and the NASDAQ-100's 17.78% advance. The catalyst came on Aug. 5 with the company's Q4 2026 earnings report, which delivered earnings per share of $39.25—significantly above guidance of $33.28—and revenue of $8.97 billion, representing 371.6% year-over-year growth. Non-GAAP gross margin reached 84.6%, underscoring the pricing power of undersupplied NAND flash memory serving AI data center buildouts.

Beyond the earnings beat, SanDisk announced eight new business model agreements that cover more than 50% of its fiscal 2027 bits and approximately two-thirds of its fiscal 2028 bits, with a weighted average contract duration exceeding four years. These signed agreements represent at least $93.9 billion in expected revenue and include $16.5 billion in financial guarantees—a structural lock-in that protects the company from commodity price swings. CEO David Goeckeler highlighted the beat on the earnings call, noting: "We delivered record revenue, gross margin, and earnings per share, each above the high end of our guidance." The company also repurchased $4.5 billion of its own stock in the quarter and signaled it would execute the buyback program consistently, backed by confidence in future cash generation.

Management's forward guidance reflects that confidence. For FY2027 Q1, the company expects revenue of $10.3 billion to $10.8 billion and EPS of $44 to $46. The macroeconomic backdrop supports these projections. NAND flash is undersupplied across the market: industry supply is tracking approximately 17% growth in 2026 against unconstrained demand in the mid-20s, and that gap is expected to persist until 2028. Fabs are operating at 100% utilization, and the next-generation BiCS8 technology is expected to reach the majority of bit production exiting fiscal 2026. These dynamics create what the article describes as a "structurally tighter" cycle than previous NAND upcycles, with multi-year volume-and-price commitments now locking in datacenter revenue.

SanDisk's financial position amplifies the bull case. The company carries zero long-term debt and maintains an authorized share buyback program. Analyst consensus stands at 14 Buy and 2 Strong Buy ratings, with an average price target of $1,460.41. As of Aug. 11, the stock traded at $1,263.83 with a forward P/E of 24, suggesting the market is pricing in sustained demand and pricing power through at least 2028.

Risks, however, are not absent. NAND is a cyclical business, and SanDisk depends on its manufacturing relationship with Kioxia. Hyperscaler customer concentration—reliance on a small number of large cloud providers for the bulk of demand—is a structural vulnerability. Additionally, the consumer segment declined 10% sequentially in Q3, hinting at weakness outside the datacenter. But with multi-year contracts in place, fabs at maximum capacity, and supply expected to remain tight through 2028, the company's cycle dynamics appear materially different from historical NAND downturns. As long as AI infrastructure spending holds its pace, SanDisk's structural advantages—earnings, guidance, balance sheet strength, and forward contract architecture—create what the article calls an "unusually clean" setup for a stock that has already run significantly.