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Arrowhead Research

279 hedge funds and large institutions have $1.67B invested in Arrowhead Research in 2025 Q2 according to their latest regulatory filings, with 58 funds opening new positions, 96 increasing their positions, 79 reducing their positions, and 38 closing their positions.

New
Increased
Maintained
Reduced
Closed
Holders
279
Holders Change
+18
Holders Change %
+6.9%
% of All Funds
3.74%
Holding in Top 10
3
Holding in Top 10 Change
-2
Holding in Top 10 Change %
-40%
% of All Funds
0.04%
New
58
Increased
96
Reduced
79
Closed
38
Calls
$8.24M
Puts
$10.6M
Net Calls
-$2.33M
Net Calls Change
-$746K
Name Holding Trade Value Shares
Change
Shares
Change %
BlackRock
1
BlackRock
New York
$307M -$7.92M -501,267 -3%
Vanguard Group
2
Vanguard Group
Pennsylvania
$245M +$36.7M +2,322,510 +18%
ACA
3
Avoro Capital Advisors
New York
$167M -$8.08M -511,111 -5%
State Street
4
State Street
Massachusetts
$101M -$9.93M -628,193 -9%
SPC
5
Slate Path Capital
New York
$82.7M
Fidelity Investments
6
Fidelity Investments
Massachusetts
$81.7M +$29.3M +1,855,228 +56%
Geode Capital Management
7
Geode Capital Management
Massachusetts
$47.1M +$446K +28,193 +1%
UBS AM
8
UBS AM
Illinois
$42.4M -$33.2M -2,100,745 -44%
SL
9
Siren LLC
Connecticut
$42.2M
Marshall Wace
10
Marshall Wace
United Kingdom
$34.1M +$33.1M +2,096,238 +3,508%
Goldman Sachs
11
Goldman Sachs
New York
$33.4M +$5.9M +373,648 +21%
Norges Bank
12
Norges Bank
Norway
$30.4M +$30.4M +1,924,957 New
Morgan Stanley
13
Morgan Stanley
New York
$26.9M -$2.26M -143,270 -8%
UBS Group
14
UBS Group
Switzerland
$25.3M -$410K -25,967 -2%
Northern Trust
15
Northern Trust
Illinois
$20.1M +$968K +61,253 +5%
Charles Schwab
16
Charles Schwab
California
$18.5M +$2.14M +135,455 +13%
Aberdeen Group
17
Aberdeen Group
United Kingdom
$15.2M -$1.78M -112,582 -10%
BBA
18
Baker Bros. Advisors
New York
$14.8M +$14.8M +939,174 New
T. Rowe Price Investment Management
19
T. Rowe Price Investment Management
Maryland
$13M -$27M -1,706,639 -67%
WFC
20
Western Financial Corp
California
$13M
Bank of New York Mellon
21
Bank of New York Mellon
New York
$12.9M +$664K +42,040 +5%
Invesco
22
Invesco
Georgia
$12.1M +$7.09M +448,585 +143%
WP
23
Woodline Partners
California
$11.8M +$2.91M +183,981 +33%
Bank of America
24
Bank of America
North Carolina
$9.87M -$2.74M -173,704 -22%
PFM
25
Privium Fund Management
Netherlands
$9.85M -$274K -17,000 -3%