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Arrowhead Research

280 hedge funds and large institutions have $1.67B invested in Arrowhead Research in 2025 Q2 according to their latest regulatory filings, with 59 funds opening new positions, 95 increasing their positions, 80 reducing their positions, and 38 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more capital invested

Capital invested by funds: $ → $

more repeat investments, than reductions

Existing positions increased: | Existing positions reduced:

more funds holding

Funds holding:

1.28% more ownership

Funds ownership: 75.34%76.62% (+1.3%)

22% less call options, than puts

Call options by funds: $8.24M | Put options by funds: $10.6M

40% less funds holding in top 10

Funds holding in top 10: 53 (-2)

Holders
280
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
3
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$8.24M
Puts
$10.6M
Net Calls
Net Calls Change

Top Buyers

1 +$36.7M
2 +$33.1M
3 +$29.3M
4
BBA
Baker Bros. Advisors
New York
+$14.8M
5
TI
Trexquant Investment
Connecticut
+$7.96M

Top Sellers

1 -$33.2M
2 -$27M
3 -$14.6M
4
Two Sigma Investments
Two Sigma Investments
New York
-$11.1M
5
State Street
State Street
Massachusetts
-$9.93M
Name Holding Trade Value Shares
Change
Change in
Stake
BNP Paribas Financial Markets
126
BNP Paribas Financial Markets
France
$534K
Zurich Cantonal Bank
127
Zurich Cantonal Bank
Switzerland
$530K
TRSOTSOK
128
Teachers Retirement System of the State of Kentucky
Kentucky
$520K
A
129
AlphaQuest
New York
$515K
COPPSERS
130
Commonwealth of Pennsylvania Public School Employees Retirement System
Pennsylvania
$510K
ProShare Advisors
131
ProShare Advisors
Maryland
$508K
ASRS
132
Arizona State Retirement System
Arizona
$506K
ORI
133
Oak Ridge Investments
Illinois
$504K
YIH
134
Y-Intercept (HK)
Hong Kong
$491K
EP
135
Edgestream Partners
New Jersey
$487K
Edgewood Management
136
Edgewood Management
Connecticut
$474K
State Board of Administration of Florida Retirement System
137
State Board of Administration of Florida Retirement System
Florida
$470K
Teacher Retirement System of Texas
138
Teacher Retirement System of Texas
Texas
$468K
OPERF
139
Oregon Public Employees Retirement Fund
Oregon
$452K
CUAMC
140
China Universal Asset Management Company
China
$438K
PFSRSONJ
141
Police & Firemen's Retirement System of New Jersey
New Jersey
$432K
Amundi
142
Amundi
France
$426K
Assenagon Asset Management
143
Assenagon Asset Management
Luxembourg
$404K
Bank of Montreal
144
Bank of Montreal
Ontario, Canada
$394K
KK
145
KLP Kapitalforvaltning
Norway
$384K
GCM
146
Graham Capital Management
Connecticut
$380K
Verition Fund Management
147
Verition Fund Management
Connecticut
$369K
SPA
148
Sherbrooke Park Advisers
New York
$359K
Jane Street
149
Jane Street
New York
$351K
DTL
150
Dynamic Technology Lab
Singapore
$309K