The Filings Report

Micron: tracked funds

MUfinancial statementsinsider tradingon the high-conviction lists

Across each manager’s latest 13F filing, mostly for Q2 2026, 3 of the 18 tracked managers held Micron; 1 opened a position, 1 added, 1 trimmed, 2 sold out. Largest: Appaloosa Management at 15.1% of its portfolio.

Funds holding it
3
of 18, each on its latest filing
Opened or added
2
1 opened, 1 added
Trimmed or sold out
3
1 trimmed, 2 sold out
Largest weight
15.1%
Appaloosa Management; combined $1.4B

Filings through August 14, 2026. Each fund is measured on its own latest 13F; counted in funds, not dollars.

The trend

Q3 2023 to Q2 2026, each fund in the quarter its filing covers, so the newest quarter can trail the figures above while filings come in.

Tracked funds holding it, and what they did, by quarterholders funds that had filed
018Q3 2023: 1 of 17 funds that had filed held itQ4 2023: 2 of 17 funds that had filed held itQ1 2024: 2 of 18 funds that had filed held itQ2 2024: 3 of 18 funds that had filed held itQ3 2024: 1 of 18 funds that had filed held itQ4 2024: 3 of 18 funds that had filed held itQ1 2025: 1 of 18 funds that had filed held itQ2 2025: 1 of 18 funds that had filed held itQ3 2025: 1 of 18 funds that had filed held itQ4 2025: 2 of 18 funds that had filed held itQ1 2026: 3 of 18 funds that had filed held itQ2 2026: 3 of 17 funds that had filed held it33Q3 2023: 0 trimmed, 2 sold outQ4 2023: 1 opened, 0 addedQ4'23Q2 2024: 1 opened, 0 addedQ2'24Q3 2024: 0 trimmed, 2 sold outQ4 2024: 2 opened, 0 addedQ4'24Q1 2025: 1 trimmed, 2 sold outQ2 2025: 0 opened, 1 addedQ2'25Q3 2025: 1 trimmed, 0 sold outQ4 2025: 1 opened, 1 addedQ4'25Q1 2026: 1 opened, 1 addedQ1 2026: 1 trimmed, 0 sold outQ2 2026: 1 opened, 1 addedQ2 2026: 1 trimmed, 1 sold outQ2'26

Each fund is placed in the quarter of its own filing. Above the lower line, funds that opened or added more than 1% of their shares; below, funds that trimmed more than 1% or sold out.

The funds

Every tracked fund with a position in its latest filing, largest weight first, and those that sold out. Bars show shares at each quarter end: green when it added, red when it sold.

FundManagerQuarterWeight× averageValueSharesChangeMoveShares by quarter
Appaloosa ManagementDavid TepperQ2 202615.06%3.8×$1.1B975,000−41.4%trimmed2023-09-30: 1M shares, 1.9%2023-12-31: 1M shares, 1.8%2024-03-31: 1M shares, 2.1%2024-06-30: 1M shares, 2.5%2024-09-30: 1M shares, 1.6%2024-12-31: 1M shares, 1.6%2025-03-31: 400,000 shares, 0.6%2025-06-30: 825,000 shares, 1.6%2025-09-30: 500,000 shares, 1.1%2025-12-31: 2M shares, 6.3%2026-03-31: 2M shares, 9.5%2026-06-30: 975,000 shares, 15.1%
Altimeter CapitalBrad GerstnerQ2 20262.94%0.5×$242M209,520—opened2024-12-31: 614,595 shares, 0.9%2026-06-30: 209,520 shares, 2.9%
Baron Capital GroupRon BaronQ2 20260.08%0.2×$50M43,335+1194.7%added2023-12-31: 1,632 shares, 0.0%2024-03-31: 4,200 shares, 0.0%2024-06-30: 3,371 shares, 0.0%2025-12-31: 6,351 shares, 0.0%2026-03-31: 3,347 shares, 0.0%2026-06-30: 43,335 shares, 0.1%
Duquesne Family OfficeStanley DruckenmillerQ2 20260%—$00—sold out2024-12-31: 408,885 shares, 1.0%2026-03-31: 23,400 shares, 0.3%
Third PointDaniel LoebQ2 20260%—$00—sold out2024-06-30: 275,000 shares, 0.4%

Questions

Which hedge funds own MU?

Across each manager's latest 13F filing (mostly Q2 2026), 3 of the 18 tracked managers held Micron: Appaloosa Management (15.1%), Altimeter Capital (2.9%), Baron Capital Group (0.1%).

Did Appaloosa Management add or sell MU last quarter?

In its Q2 2026 13F, filed August 14, 2026, Appaloosa Management trimmed its position, shares 41% lower; MU was 15.1% of its reported portfolio.

What is a 13F and what does it miss?

Managers with $100 million or more in US equities report their long positions on Form 13F each quarter, up to 45 days after it ends. The filing omits short positions, bonds, cash and most foreign listings, and a position may have changed since the quarter ended. Options are excluded here.

From the managers’ Form 13F-HR filings with the SEC, amendments applied, share counts adjusted for splits; GOOG and GOOGL are one position. A record of filings, not a recommendation.