Lam Research
LRCX
2,117 hedge funds and large institutions have $139B invested in Lam Research in 2025 Q3 according to their latest regulatory filings, with 353 funds opening new positions, 768 increasing their positions, 733 reducing their positions, and 93 closing their positions.
280% more first-time investments, than exits
New positions opened: 353 | Existing positions closed: 93
67% more funds holding in top 10
Funds holding in top 10: 49 → 82 (+33)
12% more funds holding
Funds holding: 1,887 → 2,117 (+230)
5% more repeat investments, than reductions
Existing positions increased: 768 | Existing positions reduced: 733
0.37% less ownership
Funds ownership: 82.55% → 82.18% (-0.37%)
16% less call options, than puts
Call options by funds: $2.73B | Put options by funds: $3.24B
20% less capital inflows, than outflows
Capital inflows: $7.91B | Capital outflows: $9.8B
Top Buyers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
Arrowstreet Capital
Boston,
Massachusetts
|
+$1.06B |
| 2 |
Invesco
Atlanta,
Georgia
|
+$346M |
| 3 |
Barclays
London,
United Kingdom
|
+$265M |
| 4 |
California Public Employees Retirement System
Sacramento,
California
|
+$250M |
| 5 |
AQR Capital Management
Greenwich,
Connecticut
|
+$218M |
Top Sellers
| Rank | Fund | Capital Flow |
|---|---|---|
| 1 |
JP Morgan Chase
New York
|
-$1.13B |
| 2 |
Winslow Capital Management
Minneapolis,
Minnesota
|
-$878M |
| 3 |
Fidelity International
Hamilton,
Bermuda
|
-$600M |
| 4 |
Ameriprise
Minneapolis,
Minnesota
|
-$543M |
| 5 |
T. Rowe Price Associates
Baltimore,
Maryland
|
-$408M |
LRCX Hedge Fund Activity: Q3 2025 in Review
2,117 of the 7,661 institutional investors tracked by Wall St. Rank reported a position in Lam Research (LRCX) for Q3 2025, worth a combined $139B — up 35% from $103B a quarter earlier.
Buyers outnumbered sellers: 353 funds opened new LRCX positions and 93 closed out — a net gain of 260 holders — while 768 added to existing stakes and 733 trimmed.
The largest buyer was Arrowstreet Capital, adding an estimated $1.06B. The largest seller was JP Morgan Chase, cutting an estimated $1.13B.
- 2,117 institutional investors held Lam Research (LRCX) as of Q3 2025, up from 1,887 in Q2 2025.
- Funds reported $139B of Lam Research stock for Q3 2025, up 35% quarter-over-quarter.
- 353 funds opened new Lam Research positions in Q3 2025 and 93 closed out, a net change of +260 holders.
- The largest Lam Research buyer in Q3 2025 was Arrowstreet Capital, an estimated $1.06B added.
- The largest Lam Research seller in Q3 2025 was JP Morgan Chase, an estimated $1.13B sold.
Based on aggregated 13F filings for Q3 2025.