Micron's Q3 FY2026 revenue guidance of approximately $33.5 billion would exceed the company's revenue for any full prior fiscal year.1 Its high-bandwidth memory output for all of calendar year 2026 is already sold out.1 Supply, not demand, is now the binding constraint.
Micron has begun shipping HBM for Nvidia's Vera Rubin platform, marking its entry into next-generation AI infrastructure.1 That ramp signals a transition point: AI hardware suppliers are not chasing demand — they are rationing it.
Sandisk shares have risen more than 700% year-to-date in 2026.1 Micron crossed a $1 trillion market capitalization.1 Despite those gains, both companies trade at forward price-to-earnings multiples of approximately 10 to 11 times.1 Earnings are growing faster than share prices.
Sandisk's CEO has identified inference and reasoning workloads as the fastest-growing segment in data center demand.1 That category is structurally different from training workloads. Inference runs continuously at scale, generating persistent storage and memory throughput requirements that compound over time.
The investment case rests on a specific dynamic: when supply is sold out and demand is accelerating, average selling prices stay elevated. Margin expansion follows. Both Micron and Sandisk are operating in that window now, and forward guidance suggests it continues through at least 2027.1
Key variables to monitor: whether Micron announces additional HBM capacity expansions, whether multi-year hyperscaler supply contracts are renewed or extended, and whether gross margins remain elevated over the next four quarters. If HBM ASPs hold and supply stays committed, the revenue trajectory is durable.
At current valuations, the market is pricing in strong earnings but not yet pricing in a prolonged supercycle. If the supply constraint persists into 2027, forward multiples compress further — making both stocks cheaper as they rise.
Sources:
1 Via News Signal Analysis — Micron and Sandisk AI Infrastructure Hypothesis, June 19, 2026
