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Arrowhead Research

396 hedge funds and large institutions have $7.7B invested in Arrowhead Research in 2025 Q4 according to their latest regulatory filings, with 124 funds opening new positions, 125 increasing their positions, 109 reducing their positions, and 29 closing their positions.

New
Increased
Maintained
Reduced
Closed

more first-time investments, than exits

New positions opened: | Existing positions closed:

more call options, than puts

Call options by funds: $ | Put options by funds: $

more capital invested

Capital invested by funds: $ → $

more funds holding

Funds holding:

15% more repeat investments, than reductions

Existing positions increased: 125 | Existing positions reduced: 109

14% more funds holding in top 10

Funds holding in top 10: 78 (+1)

5.1% more ownership

Funds ownership: 80.3%85.4% (+5.1%)

Holders
396
Holders Change
Holders Change %
% of All Funds
Holding in Top 10
8
Holding in Top 10 Change
Holding in Top 10 Change %
% of All Funds
New
Increased
Reduced
Closed
Calls
$148M
Puts
$38.8M
Net Calls
Net Calls Change
Name Holding Trade Value Shares
Change
Change in
Stake
T. Rowe Price Associates
26
T. Rowe Price Associates
Maryland
$55.7M
WFC
27
Western Financial Corp
California
$54.5M
Principal Financial Group
28
Principal Financial Group
Iowa
$47.5M
Assenagon Asset Management
29
Assenagon Asset Management
Luxembourg
$45.5M
Connor, Clark & Lunn Investment Management (CC&L)
30
Connor, Clark & Lunn Investment Management (CC&L)
British Columbia, Canada
$44M
Bank of America
31
Bank of America
North Carolina
$41.3M
JP Morgan Chase
32
JP Morgan Chase
New York
$40.6M
RI
33
RTW Investments
New York
$38.8M
Adage Capital Partners
34
Adage Capital Partners
Massachusetts
$36.5M
Invesco
35
Invesco
Georgia
$36.4M
Public Sector Pension Investment Board (PSP Investments)
36
Public Sector Pension Investment Board (PSP Investments)
Quebec, Canada
$31.8M
Citadel Advisors
37
Citadel Advisors
Florida
$31.5M
SPPAM
38
Summit Partners Public Asset Management
Massachusetts
$31.2M
VOYA Investment Management
39
VOYA Investment Management
Georgia
$28.1M
WP
40
Woodline Partners
California
$26.6M
PFM
41
Privium Fund Management
Netherlands
$26.4M
Legal & General Group
42
Legal & General Group
United Kingdom
$26.2M
Balyasny Asset Management
43
Balyasny Asset Management
Illinois
$25M
Alyeska Investment Group
44
Alyeska Investment Group
Illinois
$24.9M
EAM
45
Eventide Asset Management
Massachusetts
$24.6M
RhumbLine Advisers
46
RhumbLine Advisers
Massachusetts
$23.4M
Nordea Investment Management
47
Nordea Investment Management
Sweden
$21.6M
Barclays
48
Barclays
United Kingdom
$21.4M
N
49
Nuveen
North Carolina
$19.2M
Voloridge Investment Management
50
Voloridge Investment Management
Florida
$19.2M