Micron shares are up 223% year-to-date, and SanDisk shares have surged 505% over the same period — among the steepest gains in the global chip sector this year.1 Both US-based memory and storage makers are riding demand tied to AI infrastructure buildouts worldwide.1
Micron and SanDisk have locked in multi-year supply agreements with each other.2 The deals reflect a broader pattern: chipmakers from South Korea's Samsung and SK Hynix to Japan's Kioxia are also racing to secure capacity as global AI data-center construction strains memory and storage supply chains.2
High-bandwidth memory feeds the GPUs and accelerators powering large language models everywhere, from US hyperscalers to data centers in Europe and Asia.1 NAND storage handles the massive datasets those systems process. Demand from global cloud providers is now showing up directly in chipmaker valuations across markets.
Analysts see the supply agreements as evidence the industry expects demand to stay elevated for years, not quarters.2 Locking in capacity years ahead signals both companies anticipate sustained tightness in DRAM and NAND markets globally, rather than a short-term spike tied to one region's spending cycle.
The key test comes in upcoming earnings. Investors worldwide will watch Micron's and SanDisk's quarterly calls and capex guidance for explicit references to AI and data-center demand as the primary growth driver.3 Margin expansion in DRAM and NAND segments over the next two quarters, measured against hyperscaler capex announcements from the US, China and beyond, will show whether the rally reflects durable global demand or speculative positioning.3
For now, the stock moves stand as the clearest signal of how AI infrastructure spending is reshaping the memory and storage sector internationally.1 A 505% year-to-date gain for SanDisk and 223% for Micron mark some of the sharpest re-ratings in the global chip sector this year.
