Investigate / reported ownership
MU
Micron Technology Inc
5 tracked reported owners · snapshot updated 2026-10-04. Delayed disclosures, not live holdings or an investment recommendation.
Who reports owning MU?
Select a manager to inspect their portfolio. Reports may cover different quarters; portfolio weights describe disclosed long 13F holdings, not total economic exposure.
| #↑ | Manager | % Port. | History | Value | Shares |
|---|---|---|---|---|---|
| 1 | David Tepper | 15.1% | 36q | $1.13B | 975,000 |
| 2 | Joel Greenblatt | 0.4% | 40q | $693M | 600,523 |
| 3 | Lee Ainslie | <0.1% | 27q | $2M | 1,673 |
| 4 | Mairs & Power Funds | <0.1% | 2q | $473K | 410 |
| 5 | Bill Nygren | 0.0% | 2q | $208K | 180 |
Go beyond ownership.
A reviewed company brief is not available yet. You can inspect reported owners above and their filings below, then save this company for further research.
We have not generated a business case or inferred manager motives from these holdings.
Filing dates and original SEC sources
Your research workspace / MU
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Explore the available sources for MICRON TECHNOLOGY INC, then keep what deserves another look.
01 Investor activity
Reported evidence
Who reports owning it?
5 tracked reported owners in the snapshot generated 2026-10-04. Reports can cover different quarters. These are delayed disclosures, not live positions, total economic exposure, endorsements or reasons for investing.
02 Business evidence
No reviewed company brief is available. Business results, case and risks have not been established here.
03 Questions to investigate
Open saved takeaways →A material reported change · Q2 2026
Joel Greenblatt reduced reported MU shares by 86.9%.
Holdings as of Jun 30, 2026 · filed Sep 2, 2026. Position at period end: 0.4% of the reported portfolio. The filing does not reveal the trade date, price, or reason.
Reported position changes
Net disclosed share changes—not individual trades or execution dates. NEW has no prior-position percentage comparison; EXIT weight refers to the previous report.
| Manager | Move | % Port. | Δ Shares | Value | Filed |
|---|---|---|---|---|---|
| David Tepper | TRIM | 15.1% | -41% | $1.13B | Aug 14, 2026 |
| Stanley Druckenmiller | EXIT | 0.3% | -100% | $0 | Aug 14, 2026 |
Explore earlier changes and contrasting evidence
Selected historical records. Retrospective outcomes do not establish predictive skill.
Q2 2026
filed Sep 2, 2026
64d lag
+12.4% vs SPY
21 sessions after disclosure
direction not supported so far
Q2 2026
filed Aug 14, 2026
45d lag
+6.4% vs SPY
34 sessions after disclosure
direction not supported so far
Q1 2026
filed May 15, 2026
45d lag
+43.6% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2025
filed Feb 17, 2026
48d lag
+54.0% vs SPY
63 sessions after disclosure
direction supported so far
Q4 2025
filed Jan 15, 2026
15d lag
+22.6% vs SPY
63 sessions after disclosure
direction not supported so far
Q3 2025
filed Nov 14, 2025
45d lag
+70.7% vs SPY
63 sessions after disclosure
direction not supported so far
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Long US 13F disclosures omit shorts and can be amended. CUSIP 595112103. No current price, valuation or manager motive is inferred.