ARWR Arrowhead Pharmaceuticals, Inc.
Arrowhead Pharmaceuticals, Inc. (ARWR) Institutional Ownership
What the institutions did with ARWR last quarter, from their 13F filings. Counting managers rather than shares is the point: a single index fund adding to a position tells you far less than four hundred separate managers all deciding to. Positions as reported for the quarter ended June 30, 2026.
Every manager below opens. Subscribers can see any firm's whole portfolio — every position, its weight, and what they bought, trimmed and exited last quarter.
Sign in or subscribeOwnership map
Each block is one manager, sized by shares held and colored by how much they moved the position last quarter. Green added, red cut, grey stood pat.
Largest holders
| Manager | Shares | % of reported |
|---|---|---|
| BlackRock, Inc. | 14.8M | 12.4% |
| Avoro Capital Advisors LLC | 11.4M | 9.5% |
| FMR LLC | 8.0M | 6.7% |
| VANGUARD PORTFOLIO MANAGEMENT LLC | 6.4M | 5.3% |
| VANGUARD CAPITAL MANAGEMENT LLC | 6.1M | 5.1% |
| STATE STREET CORP | 5.7M | 4.8% |
| NORGES BANK | 3.9M | 3.3% |
| Invesco Ltd. | 3.9M | 3.2% |
| GEODE CAPITAL MANAGEMENT, LLC | 3.5M | 3.0% |
| FRED ALGER MANAGEMENT, LLC | 3.3M | 2.8% |
| BAKER BROS. ADVISORS LP | 2.0M | 1.7% |
| Siren, L.L.C. | 1.7M | 1.4% |
| Vestal Point Capital, LP | 1.6M | 1.3% |
| DEERFIELD MANAGEMENT COMPANY, L.P. | 1.4M | 1.2% |
| FIRST TRUST ADVISORS LP | 1.4M | 1.1% |
| Driehaus Capital Management LLC | 1.4M | 1.1% |
| Jupiter Topco LLC | 1.2M | 1.0% |
| NORTHERN TRUST CORP | 1.2M | 1.0% |
| DIMENSIONAL FUND ADVISORS LP | 1.2M | 1.0% |
| GOLDMAN SACHS GROUP INC | 1.2M | 1.0% |
| BANK OF AMERICA CORP /DE/ | 1.1M | 1.0% |
| Hood River Capital Management LLC | 1.1M | 0.9% |
| Holocene Advisors, LP | 1.1M | 0.9% |
| MORGAN STANLEY | 1.1M | 0.9% |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 964.5K | 0.8% |
Largest changes
| Manager | Action | Previous | Current | Change |
|---|---|---|---|---|
| BlackRock, Inc. | Reduced | 18.2M | 14.8M | -3.3M |
| FIRST TRUST ADVISORS LP | Increased | 149.1K | 1.4M | +1.2M |
| Holocene Advisors, LP | New | 0 | 1.1M | +1.1M |
| STATE STREET CORP | Reduced | 6.5M | 5.7M | -801.5K |
| VANGUARD PORTFOLIO MANAGEMENT LLC | Reduced | 7.1M | 6.4M | -794.8K |
| FMR LLC | Increased | 7.3M | 8.0M | +773.2K |
| D. E. Shaw & Co., Inc. | Reduced | 1.2M | 431.6K | -752.3K |
| GEODE CAPITAL MANAGEMENT, LLC | Reduced | 4.3M | 3.5M | -748.2K |
| Vestal Point Capital, LP | Reduced | 2.3M | 1.6M | -700.0K |
| Pictet Asset Management Holding SA | Reduced | 1.3M | 573.4K | -699.8K |
| Avoro Capital Advisors LLC | Increased | 10.7M | 11.4M | +655.6K |
| Invesco Ltd. | Increased | 3.3M | 3.9M | +603.3K |
| GOLDMAN SACHS GROUP INC | Reduced | 1.7M | 1.2M | -589.9K |
| RTW INVESTMENTS, LP | Sold Out | 585.7K | 0 | -585.7K |
| DIMENSIONAL FUND ADVISORS LP | Increased | 608.5K | 1.2M | +573.1K |
| RENAISSANCE TECHNOLOGIES LLC | Reduced | 1.0M | 468.9K | -567.6K |
| TWO SIGMA INVESTMENTS, LP | Increased | 35.8K | 580.6K | +544.8K |
| 1832 Asset Management L.P. | New | 0 | 538.5K | +538.5K |
| HRT FINANCIAL LP | New | 0 | 529.1K | +529.1K |
| UBS Group AG | Reduced | 1.3M | 861.5K | -474.8K |
| NORTHERN TRUST CORP | Reduced | 1.7M | 1.2M | -463.0K |
| PANAGORA ASSET MANAGEMENT INC | Reduced | 461.2K | 35.1K | -426.1K |
| Alyeska Investment Group, L.P. | Reduced | 472.9K | 58.7K | -414.1K |
| ARROWSTREET CAPITAL, LIMITED PARTNERSHIP | Reduced | 587.1K | 218.1K | -369.0K |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | Reduced | 1.3M | 964.5K | -366.5K |
| Assenagon Asset Management S.A. | Increased | 58.7K | 403.9K | +345.1K |
| MILLENNIUM MANAGEMENT LLC | New | 0 | 329.3K | +329.3K |
| CANADA PENSION PLAN INVESTMENT BOARD | Sold Out | 325.7K | 0 | -325.7K |
| Artisan Partners Limited Partnership | New | 0 | 310.7K | +310.7K |
| SUMMIT PARTNERS PUBLIC ASSET MANAGEMENT, LLC | Increased | 540.1K | 830.2K | +290.1K |
| AMERICAN CENTURY COMPANIES INC | Reduced | 651.5K | 364.2K | -287.3K |
| CHARLES SCHWAB INVESTMENT MANAGEMENT INC | Reduced | 1.2M | 923.9K | -268.2K |
| Balyasny Asset Management L.P. | Increased | 206.4K | 470.8K | +264.3K |
| Trexquant Investment LP | Reduced | 277.1K | 14.0K | -263.2K |
| Squarepoint Ops LLC | New | 0 | 255.9K | +255.9K |
| LORD, ABBETT & CO. LLC | Increased | 312.8K | 540.5K | +227.6K |
| SUSQUEHANNA INTERNATIONAL GROUP, LLP | Increased | 378.8K | 596.6K | +217.7K |
| Connor, Clark & Lunn Investment Management Ltd. | Reduced | 837.0K | 625.6K | -211.4K |
| Life Cycle Investment Partners Ltd | New | 0 | 209.1K | +209.1K |
| Longaeva Partners L.P. | Sold Out | 194.6K | 0 | -194.6K |
| PRICE T ROWE ASSOCIATES INC /MD/ | Reduced | 1.0M | 853.4K | -190.4K |
| ENVESTNET ASSET MANAGEMENT INC | Increased | 66.8K | 254.2K | +187.5K |
| DEERFIELD MANAGEMENT COMPANY, L.P. | Reduced | 1.6M | 1.4M | -184.2K |
| LPL Financial LLC | Increased | 129.5K | 310.8K | +181.3K |
| JANE STREET GROUP, LLC | Increased | 15.8K | 196.2K | +180.4K |
| VOYA INVESTMENT MANAGEMENT LLC | Reduced | 656.1K | 483.5K | -172.6K |
| SCHRODER INVESTMENT MANAGEMENT GROUP | Sold Out | 162.0K | 0 | -162.0K |
| Driehaus Capital Management LLC | Increased | 1.2M | 1.4M | +160.2K |
| Fisher Asset Management, LLC | Reduced | 1.1M | 957.7K | -155.9K |
| Weiss Asset Management LP | New | 0 | 134.0K | +134.0K |
| Privium Fund Management B.V. | Reduced | 366.9K | 234.2K | -132.7K |
| MARSHALL WACE, LLP | Increased | 179.6K | 305.0K | +125.5K |
| MORGAN STANLEY | Increased | 960.5K | 1.1M | +124.3K |
| Catalyst Funds Management Pty Ltd | New | 0 | 117.6K | +117.6K |
| Aberdeen Group plc | Reduced | 364.0K | 252.0K | -112.0K |
| DEUTSCHE BANK AG\ | Reduced | 260.0K | 149.2K | -110.7K |
| Russell Investments Group, Ltd. | Increased | 174.0K | 284.1K | +110.1K |
| ALLIANCEBERNSTEIN L.P. | Reduced | 280.4K | 173.3K | -107.1K |
| NEUBERGER BERMAN GROUP LLC | Reduced | 203.9K | 98.5K | -105.4K |
| EVERETT HARRIS & CO /CA/ | Sold Out | 104.9K | 0 | -104.9K |
13F filings are due 45 days after quarter end and cover long positions in U.S.-listed equities only, so this is a lagged and partial picture: shorts, bonds and foreign listings never appear. Options positions are excluded here rather than folded into the share counts. Political ownership is coming.