Sandisk vs. Micron: Which AI Memory Stock Is the Better Buy After Their Monster Runs?

SanDisk's NAND flash revenue jumped 251% year-over-year in 2026, fueled by AI-driven memory demand and multiyear supply contracts now locked in. Micron posted record margins in its DRAM and high-bandwidth memory (HBM) segment, with its entire 2026 HBM production already sold out.

Both stocks have surged this year on AI infrastructure buildouts requiring massive memory capacity. SanDisk's growth centers on NAND flash—the storage backbone for data centers processing AI workloads. Micron's exposure spans DRAM and HBM, the latter critical for GPU clusters running large language models.

Despite comparable forward valuations, a Motley Fool analyst favors Micron as the better buy. The rationale: Micron's broader business mix across memory types reduces concentration risk compared to SanDisk's narrower NAND focus. The analyst flags lower downside risk for Micron if AI memory demand moderates or pricing pressures return.

Both stocks reflect the market's bet that AI infrastructure spending remains durable through 2026. The divergence in product exposure—SanDisk's NAND storage versus Micron's DRAM and HBM mix—becomes the deciding factor for risk-adjusted upside.