Thesis. 84.9% gross margin on DRAM and HBM, a $41.5B quarter up 346%, HBM4 in volume for Vera Rubin and 16 multi-year customer agreements — with NVIDIA itself confirming it cannot avoid paying up for memory. The same bottleneck as Sandisk, on the other half of the memory market.
Reviewed 19 Sep 2026, after Q3 FY2026 results on 24 Jun. Q4 FY2026 reports on 23 September — this page will be stale within days.
What it does
Micron makes memory and storage chips: DRAM, NAND and NOR. The crown jewel is HBM — high bandwidth memory, the stacked DRAM that sits beside every AI accelerator. Only three companies make HBM at scale: SK hynix, Samsung and Micron. Micron is the only US-listed pure-play on the memory bottleneck. CEO Sanjay Mehrotra, Boise.
An AI-driven supercycle took gross margin from roughly 38% to roughly 85% in a year. That is the entire debate on this page: a new structural demand regime, or the biggest top in a famously cyclical business?
The most important structural change is Strategic Customer Agreements — 16 multi-year contracts that Mehrotra called "a transformation of Micron's business model, not merely a commercial enhancement." They are Micron's version of Sandisk's arrangements: contracted volume and pricing that puts a floor under a commodity cycle.
Mehrotra disclosed that Micron can fulfil only 50% to two-thirds of customer demand in the medium term. That structural deficit is the pricing power, and it is the number to watch rather than any margin.
Bull case
- Q3 FY2026 revenue $41.46B, +346% YoY and +74% QoQ. DRAM $31.3B (76% of total), +343%
- GAAP gross margin 84.6% (non-GAAP 84.9%) — a company record. GAAP net income $28.24B ($24.67/share); non-GAAP EPS $25.11, a seventh straight beat
- Operating cash flow $25.39B, from $4.61B a year earlier. Adjusted free cash flow $18.3B on $7.1B of net capex. Cash and investments $30.2B
- Q4 guided to $50.0B ±$1B at ~86% gross margin and $31.00 ±$1 EPS — beating consensus by $6.55B on revenue. The stock rose ~14.6% after hours
- 16 multi-year Strategic Customer Agreements, converting commodity exposure into contracted volume and price
- HBM sold out for 2026. HBM4 in high-volume shipments for the lead customer's platform (NVIDIA Vera Rubin), with qualification samples to multiple end-customers and HBM4E volume in calendar 2027. HBM revenue forecast to go from ~$35B in 2025 to ~$100B in 2028
- Capacity is being built: Idaho fab first wafer mid-CY2027, a quarter early; second Idaho cleanroom with EUV begun; NY fab cluster broke ground January 2026; Singapore HBM packaging contributing H1 CY2027
- Overtook Samsung to become #2 in HBM at ~21%
Bear case
- The one line to weigh carefully: "Our fiscal Q4 gross margin outlook reflects a meaningful moderation in the rate of price increases." Prices are still rising — the guide is 86% — but the acceleration is ending. That second derivative is the signal to watch across the whole memory complex
- Memory is the most cyclical business in technology, and an ~85% gross margin mean-reverts
- FY26 capex ~$27B with FY27 quarterly capex above Q4's ~$10B run-rate, and all three suppliers ramping. The industry supply response is funded, which seeds 2027–28 oversupply risk
- #3 in HBM4 at roughly 20% of NVIDIA Rubin, against SK hynix at around two-thirds. Share, not market growth, is what matters in a three-player race
- A low forward multiple on record earnings is the classic peak-earnings value trap, not automatically cheap. Beta 2.14
- Commodity at heart — no CUDA-style lock-in, and a follower rather than a leader in HBM
- HBM allocation agreements are private, so "sold out" cannot be independently verified
Major customers
- NVDA — HBM. The most important customer relationship Micron has, and the one that determines the multiple
- Hyperscalers — Microsoft, Amazon, GOOG, META buying server DRAM and datacentre SSDs, directly and through OEMs
- Server OEMs — Dell, HPE, SMCI, Lenovo
- Apple and smartphone OEMs — mobile DRAM and NAND
- Automotive and industrial — a smaller, steadier base
⚠️ Customer percentages are not disclosed.
Read-through. NVDA accelerator volumes drive HBM demand almost one-for-one, and because HBM allocation is sold out well in advance, NVIDIA's roadmap is effectively Micron's revenue forecast. The strongest confirmation in this file runs the other way: NVIDIA guided its own gross margin down to 71–72% by Q4 FY27 explicitly citing memory prices, with CFO Kress saying increases "exceeded our prior expectations and are headed even higher into next year." The largest buyer in the chain is confirming it is paying up — supply-side and demand-side agreeing is as close to verification as this file gets. Micron competes with SKHY and Samsung in HBM and with SNDK in NAND. TSM is a partner rather than a competitor: CoWoS packaging places Micron's HBM beside the processor, so TSMC's packaging constraint is also a ceiling on how much HBM gets consumed. And P sits on the paying side of this trade.
What would change the view
Strengthens: HBM4 share above 20%, hyperscaler capex rising, supply staying tight into 2027, 80%+ gross margin sustained.
Weakens: any hyperscaler capex cut, DRAM prices rolling over, competitor capacity additions landing, HBM4 share below 15%.
Specifically worth tracking: hyperscaler capex guidance, DRAM spot prices and channel inventory, HBM4 share against SK hynix, competitor capacity, and above all the rate of change in pricing rather than the level.
Update log
19 Sep 2026 — Converted to the standard template. Removed the pre-Q3 snapshot and thesis-tracker table, which were still quoting a $9.3B-era business alongside the current $41.5B quarter. Q4 FY2026 reports on 23 September, so this page should be refreshed immediately after.
7 Sep 2026 — Verdict: Constructive → Conviction. The page had been badly stale, predating the most extraordinary quarter in Micron's history. The demand-side confirmation from NVIDIA's own margin guidance identified as the decisive evidence.
24 Jun 2026 — Q3 FY2026 reported. Revenue $41.46B (+346% YoY, +74% QoQ); DRAM $31.3B (+343%); GAAP gross margin 84.6% (non-GAAP 84.9%), a record; GAAP net income $28.24B ($24.67/share), non-GAAP EPS $25.11; operating cash flow $25.39B; adjusted FCF $18.3B; cash $30.2B. Q4 guided $50.0B ±$1B at ~86% GM and $31.00 ±$1 EPS, beating consensus by $6.55B on revenue. 16 Strategic Customer Agreements disclosed. HBM4 in high-volume shipments; HBM sold out for 2026. Can fulfil only 50–66% of medium-term demand. Stock +14.6% after hours.
Probabilities: strengthen ~57% / weaken ~37%, the latter rising further out on 2027–28 oversupply risk.
Research and education only — not investment advice.
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