Micron Technology will deploy more than $250 billion in domestic capital expenditure through 2035, breaking ground on what the company describes as the largest fab construction project in US history. The commitment arrives as memory demand from AI infrastructure builders accelerates faster than most semiconductor analysts projected eighteen months ago.

The investment represents a 40% increase over Micron's prior decade-long capital plan announced in 2022, when the company outlined $150 billion in US spending. Construction has commenced on facilities designed to manufacture high-bandwidth memory and advanced DRAM required for training clusters and inference workloads. The company disclosed that the first of multiple fabrication plants will occupy sites in New York and Idaho, with Arizona under consideration for later phases. Micron declined to specify which location hosts the record-scale fab but confirmed that all facilities will use extreme ultraviolet lithography tools procured under existing supplier agreements with ASML.

The timing reflects a structural shift in memory economics. HBM3E modules, which Micron supplies to NVIDIA and AMD for AI accelerators, carry three to four times the average selling price of standard DRAM. Hyperscalers have already locked 60% to 70% of projected 2026 HBM output through long-term supply agreements, according to company filings. That forward visibility justifies the capital intensity and the extended timeline, which stretches beyond typical five-year semiconductor investment horizons. Micron's move also positions the firm to capture CHIPS Act subsidies, though the company has not disclosed subsidy amounts or application status.

Allocators should track three developments. First, Micron's next quarterly earnings call in late March will likely detail phase-one capital allocation and clarify which facilities enter production in 2027 versus 2029. Second, competitor SK hynix is expected to announce its own US expansion by mid-2025, which could compress HBM pricing assumptions embedded in current models. Third, the US Department of Commerce will release updated CHIPS Act funding decisions in Q2, and any Micron award will set the benchmark for memory-focused subsidies versus logic-chip incentives already granted to Intel and TSMC.

The $250 billion figure now represents the largest single-company semiconductor commitment on US soil, exceeding Intel's $100 billion Ohio plan and TSMC's $65 billion Arizona investment. Micron's timeline extends four years beyond most peer commitments, suggesting the company expects AI memory demand to remain structurally elevated into the 2030s rather than cyclical.