Micron is the #3 DRAM (~25% share) and the smallest of three HBM vendors, now in high-volume shipment of HBM4 (1-beta) to its lead customer (NVIDIA Vera Rubin), with HBM4E (1-gamma) tracking 2x faster than HBM3E toward CY2027 volume. CERTIFIED-SUPPLIER FACT (corrected 2026-06-18, re-affirmed by Q3): NVIDIA CEO Jensen Huang publicly certified Micron — alongside SK Hynix and Samsung — as a qualified, in-production HBM4 supplier for the flagship Vera Rubin (VR200/NVL72) platform; the prior 'NVL72 lockout / MU = 0%' premise (Castellano/SemiAnalysis/Dataconomy) is RETIRED. Q3 FY2026 (reported 2026-06-24, quarter ended 2026-05-28) was a record blowout vs guidance: revenue $41.456B (+346% YoY, +74% QoQ, ~24% ABOVE the $33.5B guide), GAAP GM 84.6% / non-GAAP 84.9%, GAAP operating margin 80.4%, GAAP diluted EPS $24.67 / non-GAAP $25.11, OCF $25.39B, adjusted FCF $18.3B. Data center is now 61% of revenue (Cloud Memory $13.8B at 78% op margin + Core Data Center $11.5B at 83% op margin). Q4 FY2026 is guided to a SECOND record step-up — revenue $50.0B ±$1.0B, ~86% GM, GAAP EPS $30.73 ±$1.00 (non-GAAP $31.00). NEW STRUCTURAL PILLAR — Strategic Customer Agreements: Micron executed 16 multi-year (3-5yr) SCAs that lock volume and carry ~$22B in upfront customer cash deposits + related commitments and ~$100B remaining performance obligations (14 of 16 with guaranteed minimum revenue); when fully ramped ~half of company revenue is expected to sit under SCAs. Management frames them as enhancing the 'durability and predictability' of performance, alongside a commitment to return 100% of excess cash to shareholders. This partially shifts the valuation frame from pure cyclical-beta toward contract-visibility — a genuine structural improvement, though NOT a repeal of the memory cycle. With access resolved and the earnings stream materially de-risked by SCAs, conviction is governed by two residual considerations: (1) VALUATION — at the $1,184.18 close (2026-06-26, POST the Q3 earnings reaction) the stock is up ~3.4x YTD; on the now-much-higher FY2026E EPS run-rate (~$72 GAAP / ~$73 non-GAAP after the Q3 beat + Q4 guide) forward P/E sits ~16x, but P/B remains rich (~13x, above the prior 10-year peak of 8x) — the classic memory trap is that low forward P/E coincides with peak earnings; (2) MEMORY CYCLICALITY + FY2027 supply — Samsung/SK Hynix 2027 co-expansion plus CXMT commodity-DRAM additions (EUV-gated out of HBM3E/HBM4) could pressure the H2 CY2027 conventional-DRAM cycle, partially offset now by the SCA volume/price locks. The AI-memory super-cycle is real, Micron participates in the flagship socket, and SCAs add multi-year visibility — but at peak-cycle margins and a rich P/B the asymmetry is balanced, a HOLD (constructive on the de-risked stream, disciplined on the multiple), not a fresh Buy. // KILL SEARCH: CLEAR — no HBM-replacement consortium/standard (MRAM/PIM remain research-stage); HBM4 in mass production across all three vendors and MU confirmed in HVM to its lead customer; the prior NVL72-lockout kill stays RETIRED.