Sandisk Corporation: Bull Thesis Strengthens As Execution Shines

SanDisk (SNDK) delivered a strong 4Q25, reporting $1.90 billion in revenue, up 12% sequentially and beating estimates, alongside improved gross margins. The company is benefiting from a confirmed NAND market undersupply, expected to persist through CY2026, driving pricing power. Key growth catalysts include robust demand for enterprise SSDs, particularly for AI applications, supported by new product offerings and hyperscaler qualifications, and a technology roadmap focused on both near-term efficiency gains (BiCS8) and long-term AI-centric memory (HBF). Analysts project FY28 EPS to nearly triple, suggesting the current ~8x valuation is significantly undervalued given the growth trajectory, with a target price of ~$77.

Analysis

SanDisk Corporation (SNDK) reported a robust 4Q25, with revenue of $1.90 billion, a 12% sequential increase that surpassed both guidance and consensus estimates, driven by growth in bit shipments and average selling prices (ASP). Adj. gross margin expanded by 370 basis points to 26.4%, despite incurring $93 million in combined underutilization and fab startup costs. The positive momentum is underscored by strong 1Q26 revenue guidance of $2.10–$2.20 billion. The core investment thesis is validated by management's confirmation of a NAND market undersupply, quantified as a mid-single-digit gap, which is expected to persist through calendar year 2026 and supports the price increases initiated in 4Q25. A key growth catalyst has materialized in the enterprise SSD segment, which now accounts for over 12% of total bit shipments. This is propelled by the launch of a 256-terabyte NVMe SSD targeting AI data lakes and ongoing qualifications with a second major hyperscaler, signaling strong technological validation and a favorable mix shift towards higher-margin products. The technology roadmap presents a clear path to future profitability; the near-term transition to BiCS8 memory, while currently pressuring margins, is projected to reach 50% of production by the end of FY26, promising lower costs per gigabyte. Longer-term, the development of High Bandwidth Flash (HBF) in partnership with SK hynix positions SNDK to capitalize on the critical low-latency data access demands of advanced AI workloads.

Key Decisions for Investors

• Given the confirmed NAND supply deficit and strong growth in the high-margin enterprise SSD segment, the current valuation of approximately 8 times forward earnings appears disconnected from the consensus projection of a near tripling in EPS by FY28, suggesting a potentially attractive entry point for growth-oriented investors.
• Investors should monitor the progression of adj. gross margins and the sales mix from the enterprise SSD segment, as these are the primary drivers for achieving the margin recovery and earnings growth embedded in long-term forecasts.
• Key milestones to watch that would validate the long-term thesis include the successful production ramp of BiCS8 to 50% of output by year-end FY26 and tangible development progress on the High Bandwidth Flash (HBF) architecture by 2H26.
• While the outlook is strong, investors must remain cognizant of the NAND market's cyclical nature and SNDK's execution risk; any slowdown in hyperscaler adoption or signs of renewed industry oversupply would be critical signals to reassess the position.