ARWR Arrowhead Pharmaceuticals, Inc.

NASDAQ
$80.67

Arrowhead Pharmaceuticals, Inc. (ARWR) Hedge Fund Activity

This view isolates hedge funds from the broader institutional ownership shown on the Institutional tab. A pension fund tracking an index may have no view on a stock; when a hedge fund builds or exits a position, that decision can carry information. This page measures those changes. Positions as of June 30, 2026.

Based on quarterly 13F long-equity filings. Changes compare reported quarter-end positions; filings can be reported up to 45 days later and do not represent a fund's complete exposure.

Hedge fund breadth
-25.58
16 buyers / 27 sellers
STRONG SELLING
Funds compared
45
funds with comparable ARWR positions
36 current holders · 35 prior-quarter holders
Net share change
-626.6K
+3.71M added, -4.34M cut
Position activity
10 new 6 increased 18 reduced 9 exited

Most significant moves

Ranked by conviction, not size — how much of the fund's own book the position represents, how far it moved, and what kind of fund made it.

Fund Action Shares changed Change Est. value Portfolio wt. Score
RTW Investments Growth Healthcare Sold Out -585.7K -100.0% $47.7M 0.0% 67
Bridgewater Associates Quant Macro Sold Out -95.6K -100.0% $7.8M 0.0% 63
Holocene Advisors, LP New +1.11M — $90.2M 0.2% 63
Farallon Capital Management Event Value Sold Out -15.8K -100.0% $1.3M 0.0% 62
Avoro Capital Advisors Healthcare Increased +655.6K +6.1% $53.4M 8.3% 62
MILLENNIUM MANAGEMENT LLC New +329.3K — $26.8M 0.0% 61
Vestal Point Capital Growth Healthcare Reduced -700.0K -30.8% $57.1M 3.0% 61
CITADEL ADVISORS LLC Quant Sold Out -98.2K -100.0% $8.0M 0.0% 60
Soleus Capital Management Growth Healthcare Sold Out -28.5K -100.0% $2.3M 0.0% 59
Weiss Asset Management Event Quant New +134.0K — $10.9M 0.2% 59

Most significant buyers

By move score, not size.

  • Holocene Advisors, LP New · +1.11M
  • Avoro Capital Advisors Increased · +655.6K
  • MILLENNIUM MANAGEMENT LLC New · +329.3K
  • Weiss Asset Management New · +134.0K
  • Squarepoint Ops LLC New · +255.9K

Most significant sellers

By move score, not size.

  • RTW Investments Sold Out · -585.7K
  • Bridgewater Associates Sold Out · -95.6K
  • Farallon Capital Management Sold Out · -15.8K
  • Vestal Point Capital Reduced · -700.0K
  • CITADEL ADVISORS LLC Sold Out · -98.2K

Hedge fund positions

Fund Tier Shares Previous Change Change % Portfolio wt. Action Score
RTW Investments 1 0 585.7K -585.7K -100.0% 0.0% Sold Out 67
Bridgewater Associates 1 0 95.6K -95.6K -100.0% 0.0% Sold Out 63
Holocene Advisors, LP 2 1.1M 0 +1.11M — 0.2% New 63
Farallon Capital Management 1 0 15.8K -15.8K -100.0% 0.0% Sold Out 62
Avoro Capital Advisors 1 11.4M 10.7M +655.6K +6.1% 8.3% Increased 62
MILLENNIUM MANAGEMENT LLC 2 329.3K 0 +329.3K — 0.0% New 61
Vestal Point Capital 1 1.6M 2.3M -700.0K -30.8% 3.0% Reduced 61
CITADEL ADVISORS LLC 1 0 98.2K -98.2K -100.0% 0.0% Sold Out 60
Soleus Capital Management 2 0 28.5K -28.5K -100.0% 0.0% Sold Out 59
Weiss Asset Management 2 134.0K 0 +134.0K — 0.2% New 59
Squarepoint Ops LLC 2 255.9K 0 +255.9K — 0.0% New 59
Ghisallo Capital Management 2 60.0K 0 +60.0K — 0.1% New 57
Balyasny Asset Management L.P. 2 470.8K 206.4K +264.3K +128.1% 0.1% Increased 56
TWO SIGMA INVESTMENTS, LP 2 580.6K 35.8K +544.8K +1521.8% 0.0% Increased 55
LMR Partners 3 20.1K 0 +20.1K — 0.0% New 55
Quadrature Capital 3 0 55.5K -55.5K -100.0% 0.0% Sold Out 55
Jain Global 3 61.9K 0 +61.9K — 0.1% New 54
J. Goldman & Co. 3 0 41.2K -41.2K -100.0% 0.0% Sold Out 53
Cinctive Capital Management 3 0 49.1K -49.1K -100.0% 0.0% Sold Out 53
Brevan Howard Capital Management 3 58.9K 0 +58.9K — 0.1% New 52
Alyeska Investment Group, L.P. 2 58.7K 472.9K -414.1K -87.6% 0.0% Reduced 51
CenterBook Partners 4 19.7K 0 +19.7K — 0.1% New 51
Aquatic Capital Management 4 0 80.2K -80.2K -100.0% 0.0% Sold Out 51
Y-Intercept 4 40.2K 0 +40.2K — 0.1% New 51
D. E. Shaw & Co., Inc. 1 431.6K 1.2M -752.3K -63.5% 0.0% Reduced 49
Trexquant Investment 3 14.0K 277.1K -263.2K -95.0% 0.0% Reduced 48
MARSHALL WACE, LLP 2 305.0K 179.6K +125.5K +69.9% 0.0% Increased 47
Gotham Asset Management, LLC 2 6.7K 38.2K -31.5K -82.5% 0.0% Reduced 46
RENAISSANCE TECHNOLOGIES LLC 1 468.9K 1.0M -567.6K -54.8% 0.1% Reduced 45
Deerfield Management 1 1.4M 1.6M -184.2K -11.7% 1.4% Reduced 44
Voleon Capital Management 3 18.6K 69.2K -50.6K -73.1% 0.0% Reduced 41
Lighthouse Investment Partners 3 7.5K 29.0K -21.5K -74.1% 0.0% Reduced 41
Winton Group 4 9.6K 55.1K -45.5K -82.5% 0.0% Reduced 41
Integral Health Asset Management 2 200.0K 300.0K -100.0K -33.3% 0.7% Reduced 40
Hudson Bay Capital Management 3 25.6K 64.1K -38.5K -60.1% 0.0% Reduced 39
Affinity Asset Advisors 2 150.0K 200.0K -50.0K -25.0% 0.6% Reduced 36
Edgestream Partners 4 39.5K 92.0K -52.5K -57.1% 0.1% Reduced 35
AQR Capital Management 3 198.8K 167.2K +31.6K +18.9% 0.0% Increased 26
ADAR1 Capital Management 3 69.8K 70.3K -500 -0.7% 0.3% Reduced 24
Schonfeld Strategic Advisors 3 9.2K 10.0K -815 -8.1% 0.0% Reduced 22
Engineers Gate 4 36.5K 44.9K -8.4K -18.6% 0.0% Reduced 22
Boothbay Fund Management 4 41.2K 47.0K -5.7K -12.2% 0.1% Reduced 21
Quantbot Technologies 4 10.8K 9.0K +1.9K +20.9% 0.0% Increased 20
Baker Bros. Advisors 1 2.0M 2.0M 0 +0.0% 0.8% Unchanged 29
Woodline Partners LP 2 200.2K 200.2K 0 +0.0% 0.1% Unchanged 18

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Hedge funds are identified from their 13F filings, which are due 45 days after quarter end and cover long U.S.-listed equity positions only. A fund's short book never appears, so a reduced position can mean a changed view or a changed hedge — the filing doesn't say which.