Lam Research
LRCX
2,108 hedge funds and large institutions have $136B invested in Lam Research in 2025 Q3 according to their latest regulatory filings, with 351 funds opening new positions, 766 increasing their positions, 729 reducing their positions, and 93 closing their positions.
277% more first-time investments, than exits
New positions opened: 351 | Existing positions closed: 93
67% more funds holding in top 10
Funds holding in top 10: 49 → 82 (+33)
33% more capital invested
Capital invested by funds: $103B → $136B (+$33.7B)
12% more funds holding
Funds holding: 1,879 → 2,108 (+229)
5% more repeat investments, than reductions
Existing positions increased: 766 | Existing positions reduced: 729
1.76% less ownership
Funds ownership: 82.54% → 80.78% (-1.8%)
16% less call options, than puts
Call options by funds: $2.73B | Put options by funds: $3.24B
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
2,108 of the 7,621 institutional investors tracked by Wall St. Rank reported a position in Lam Research (LRCX) for Q3 2025, worth a combined $136B — up 33% from $103B a quarter earlier.
Buyers outnumbered sellers: 351 funds opened new LRCX positions and 93 closed out — a net gain of 258 holders — while 766 added to existing stakes and 729 trimmed.
The largest buyer was Arrowstreet Capital, adding an estimated $1.06B. The largest seller was JP Morgan Chase, cutting an estimated $1.13B.
- 2,108 institutional investors held Lam Research (LRCX) as of Q3 2025, up from 1,879 in Q2 2025.
- Funds reported $136B of Lam Research stock for Q3 2025, up 33% quarter-over-quarter.
- 351 funds opened new Lam Research positions in Q3 2025 and 93 closed out, a net change of +258 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.