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Arrowhead Research

282 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, 98 increasing their positions, 81 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:

0.07% less ownership

Funds ownership: 76.72%76.65% (-0.07%)

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
282
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
$2.84K
252
$2.8K
253
$2.61K
254
$2.4K
255
$1.98K
256
$1.64K
257
$1.58K
258
$1.47K
259
$1.45K
260
$1.38K
261
$1.26K
262
$1.19K
263
$1.15K
264
$1.15K
265
$1K
266
$933
267
$872
268
$853
269
$758
270
$738
271
$727
272
$727
273
$600
274
$474
275
$427