Micron shares are up 223% year-to-date. Sandisk shares are up 505% year-to-date.1 Both moves track surging demand for memory and storage chips tied to AI infrastructure buildouts.
Micron and Sandisk have locked in multi-year supply agreements with each other.2 The deals aim to secure production capacity as hyperscalers race to build AI data centers, which require far more memory bandwidth than traditional servers.
High-bandwidth memory (HBM) sits next to AI accelerator chips and feeds them data at speeds standard DRAM cannot match. Training and running large AI models depends on this bandwidth, making HBM a bottleneck component in AI server production.
NAND flash storage faces similar pressure. AI workloads generate and move enormous datasets, driving demand for high-capacity storage alongside compute and memory upgrades. Sandisk's larger stock gain reflects its concentrated exposure to NAND and storage products now central to AI infrastructure.
The scale of these rallies signals that investors expect AI-driven demand to persist for multiple years, not just a short-term spike. Multi-year supply agreements between chipmakers are a direct response: they let both sides plan capacity expansion with revenue visibility locked in ahead of time.
This matters for the broader chip supply chain. When memory makers commit capacity years in advance, it can tighten availability for other buyers and push prices higher across the market. It also signals confidence that AI infrastructure spending will keep growing, since chipmakers rarely lock in multi-year deals for demand they see as temporary.
The next signals to watch are quarterly earnings calls and capital expenditure guidance from Micron and Sandisk, where AI and data-center demand should show up explicitly as growth drivers. Margin trends in DRAM and NAND segments over the coming quarters will show whether hyperscaler capex is translating into pricing power for memory and storage makers.