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Lam Research

1,774 hedge funds and large institutions have $74.2B invested in Lam Research in 2025 Q1 according to their latest regulatory filings, with 269 funds opening new positions, 727 increasing their positions, 541 reducing their positions, and 138 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more funds holding in top 10

Funds holding in top 10:

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding

Funds holding:

4% more call options, than puts

Call options by funds: $1.79B | Put options by funds: $1.72B

0.45% less ownership

Funds ownership: 80.1%79.65% (-0.45%)

0% less capital invested

Capital invested by funds: $74.6B → $74.2B (-$363M)

Holders
1,774
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
31
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$1.79B
Puts
$1.72B
Net Calls
Net Calls Change

Top Buyers

1 +$608M
2 +$587M
3 +$562M
4
Coatue Management
Coatue Management
New York
+$303M
5
Citadel Advisors
Citadel Advisors
Florida
+$257M

Top Sellers

1 -$1.28B
2 -$468M
3 -$271M
4
Janus Henderson Group
Janus Henderson Group
United Kingdom
-$260M
5
D.E. Shaw & Co
D.E. Shaw & Co
New York
-$234M
Name Holding Trade Value Shares
Change
Change in
Stake
CI
1776
Cincinnati Insurance
Ohio
WAM
1777
Weiss Asset Management
Massachusetts
Arrowstreet Capital
1778
Arrowstreet Capital
Massachusetts
Walleye Trading
1779
Walleye Trading
New York
PL
1780
Parkwood LLC
Ohio
RPI
1781
Railway Pension Investments
United Kingdom
Capital International Investors
1782
Capital International Investors
California
MTWSIF
1783
Mivtachim The Workers Social Insurance Fund
Israel
ACM
1784
Aquatic Capital Management
Illinois
NI
1785
Nuance Investments
Missouri
AM
1786
Atreides Management
Massachusetts
Renaissance Technologies
1787
Renaissance Technologies
New York
DekaBank Deutsche Girozentrale
1788
DekaBank Deutsche Girozentrale
Germany
PAM
1789
Pamalican Asset Management
Hong Kong
LAM
1790
LECAP Asset Management
United Kingdom
4A
1791
4D Advisors
California
RFM
1792
Royal Fund Management
Florida
MMA
1793
Mizuho Markets Americas
New York
QC
1794
Quantessence Capital
New York
YIH
1795
Y-Intercept (HK)
Hong Kong
SCM
1796
Sone Capital Management
New York
MCC
1797
Malaga Cove Capital
California
OCM
1798
Octahedron Capital Management
California
EP
1799
Essential Planning
New Hampshire
NA
1800
Navellier & Associates
Nevada