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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 57 funds opening new positions, 97 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:

1.25% more ownership

Funds ownership: 75.38%76.62% (+1.2%)

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 +$33.3M
2 +$30.1M
3 +$26.6M
4
BBA
Baker Bros. Advisors
New York
+$13.5M
5
TI
Trexquant Investment
Connecticut
+$7.23M

Top Sellers

1 -$30.1M
2 -$24.5M
3 -$13.3M
4
Two Sigma Investments
Two Sigma Investments
New York
-$10.1M
5
State Street
State Street
Massachusetts
-$9.01M
Name Holding Trade Value Shares
Change
Change in
Stake
251
$2.8K
252
$2.61K
253
$2.4K
254
$1.98K
255
$1.64K
256
$1.58K
257
$1.47K
258
$1.45K
259
$1.38K
260
$1.26K
261
$1.19K
262
$1.15K
263
$1K
264
$933
265
$872
266
$853
267
$758
268
$738
269
$727
270
$727
271
$600
272
$474
273
$427
274
$348
275
$284