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Micron GAAP gross margin: three comparisons

Comparison	From	To	Change
Q3 actual to Q4 actualQuarters ended 28 May and 3 Sep 2026	84.6%	86.8%	+2.2 points
Q4 guidance to Q4 actualGuided 24 Jun, reported 30 Sep 2026	About 86%	86.8%	about +0.8 points
Q4 actual to Q1 guidanceQ1 of fiscal 2027; both given 30 Sep 2026	86.8%	About 85.95%	about −0.85 points

• Source Micron release, 24 Jun 2026 Q3 actual, Q4 guidance
• Source Micron release, 30 Sep 2026 Q4 actual, Q1 guidance

Checked by hand against both releases on 1 Nov 2026. One selected example, not a measure of overall accuracy.

Semi-Radar label: New data point. Alerts are off until thresholds are calibrated.

Interpretation (written by the researcher)

Should any assumptions based on Q4’s 86.8% GAAP gross margin be revisited in light of the approximately 85.95% guidance for FY2027 Q1? A question for your own model, not a fact and not a recommendation.

Method and limits

Changes are simple differences of the reported percentages: 86.8 minus 84.6, 86.8 minus 86, and 85.95 minus 86.8. Guidance figures are Micron’s own approximate figures, so changes against guidance are approximate.

All figures are GAAP gross margin as a percentage of revenue. No adjustment for quarter length or business mix. No cause is implied. The Q3 figure is not replaced by the Q4 figure; both stay on record.

Companies

NVIDIA (NVDA), TSMC (TSM), Micron (MU), ASML (ASML), Broadcom (AVGO)

Alerts

Off until thresholds are calibrated.

Not

A news feed, an AI summary tool, an estimates database or investment advice. It is not faster than your terminal, and does not try to be.