Arrowhead PharmaceuticalsARWR
13F holders, Q2 2026 (June 30)501holders +64
120new positions
57sold out
6famous investors
$81.56avg. 13F price*
At the end of Q2 2026, 501 institutions reported holding Arrowhead Pharmaceuticals Inc. (ARWR) in their 13F filings, up 64 from Q1 2026. 120 opened new positions and 57 sold out. The largest holders were BlackRock, Inc. ($1.2B), Avoro Capital Advisors LLC ($925.6M) and FMR LLC ($655.3M). 6 famous investors held it, including Jim Simons / Peter Brown (0.1% of Renaissance Technologies's portfolio), Ken Fisher (0.0% of Fisher Asset Management's portfolio) and David E. Shaw (0.0% of D. E. Shaw & Co.'s portfolio).
- Company
- Arrowhead Pharmaceuticals Inc.
- CUSIP
- 04280A100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q1 2026 → Q2 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 120 | $377.6M |
| Exits | 57 | $136.7M |
All 13F filers, Q1 2026 → Q2 2026: 12,657,065 shares bought and 17,912,339 shares sold, net −5,255,274 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 501 holders
| BlackRock, Inc. | 0.02% | Reduce -18.3% | 14,830,553 | $1.2B |
| Avoro Capital Advisors LLC | 8.31% | Add +6.1% | 11,355,555 | $925.6M |
| FMR LLC | 0.03% | Add +10.6% | 8,039,804 | $655.3M |
| Vanguard Portfolio Management LLC | 0.02% | Reduce -11.1% | 6,351,355 | $517.7M |
| Vanguard Capital Management LLC | 0.01% | Add +1.3% | 6,110,953 | $498.1M |
| State Street Corp. | 0.01% | Reduce -12.3% | 5,694,640 | $464.2M |
| Norges Bank | 0.03% | — | 3,896,536 | $317.6M |
| Invesco Ltd. | 0.03% | Add +18.4% | 3,883,976 | $316.6M |
| Geode Capital Management, LLC | 0.02% | Reduce -17.5% | 3,530,612 | $298.8M |
| Fred Alger Management, LLC | 0.90% | Reduce -1.2% | 3,301,919 | $269.1M |
| Baker Bros. Advisors LP | 0.82% | No change | 1,992,783 | $162.4M |
| Siren, L.L.C. | 2.84% | Add +6.2% | 1,715,476 | $139.8M |
| Vestal Point Capital, LP | 3.00% | Reduce -30.8% | 1,575,000 | $128.4M |
| Deerfield Management Company, L.P. | 1.41% | Reduce -11.7% | 1,389,055 | $113.2M |
| First Trust Advisors LP | 0.06% | Add +807.1% | 1,352,918 | $110.3M |
| Driehaus Capital Management LLC | 0.64% | Add +13.5% | 1,350,556 | $110.1M |
| Jupiter Topco LLC | 0.04% | — | 1,221,596 | $99.6M |
| Northern Trust Corp. | 0.01% | Reduce -28.0% | 1,192,868 | $97.2M |
| Dimensional Fund Advisors LP | 0.02% | Add +94.2% | 1,181,608 | $96.3M |
| Goldman Sachs Group Inc. | 0.01% | Reduce -33.9% | 1,150,007 | $93.7M |
| Bank of America Corp. | 0.01% | Add +7.1% | 1,139,810 | $92.9M |
| Hood River Capital Management LLC | 0.66% | Add +6.1% | 1,120,747 | $91.4M |
| Holocene Advisors, LP | 0.21% | New | 1,106,177 | $90.2M |
| Morgan Stanley | 0.00% | Add +12.9% | 1,084,835 | $88.4M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.01% | Reduce -27.5% | 964,479 | $78.6M |
| Fisher Asset Management | 0.02% | Reduce -14.0% | 957,691 | $78.1M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -22.5% | 923,927 | $75.3M |
| Vanguard Fiduciary Trust Co. | 0.02% | Reduce -7.2% | 896,738 | $73.1M |
| UBS Group AG | 0.01% | Reduce -35.5% | 861,520 | $70.2M |
| Bank of New York Mellon Corp | 0.01% | Reduce -10.5% | 859,538 | $70.1M |
| T. Rowe Price Associates Inc. | 0.01% | Reduce -18.2% | 853,360 | $69.6M |
| Summit Partners Public Asset Management, LLC | 1.76% | Add +53.7% | 830,247 | $67.7M |
| Western Financial Corp | 19.58% | No change | 820,239 | $66.9M |
| JPMorgan Chase & Co. | 0.00% | Reduce -6.7% | 637,399 | $51.8M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.10% | Reduce -25.3% | 625,569 | $51.0M |
| Susquehanna International Group, LLP | 0.04% | Add +57.5% | 596,573 | $48.6M |
| Two Sigma Investments, LP | 0.04% | Add +1521.8% | 580,609 | $47.3M |
| Pictet Asset Management Holding SA | 0.04% | Reduce -55.0% | 573,419 | $46.7M |
| BNP Paribas Financial Markets | 0.02% | Reduce -14.1% | 558,643 | $45.5M |
| Lord, Abbett & Co. LLC | 0.13% | Add +72.8% | 540,466 | $44.1M |
| 1832 Asset Management L.P. | 0.05% | New | 538,500 | $43.9M |
| Principal Financial Group Inc. | 0.02% | Add +5.0% | 514,658 | $41.9M |
| HRT Financial LP | 0.07% | New | 498,655 | $40.6M |
| Voya Investment Management LLC | 0.04% | Reduce -26.3% | 483,495 | $39.4M |
| Balyasny Asset Management L.P. | 0.07% | Add +128.1% | 470,754 | $38.4M |
| Renaissance Technologies | 0.05% | Reduce -54.8% | 468,921 | $38.2M |
| Franklin Resources Inc. | 0.01% | Reduce -0.1% | 462,133 | $37.7M |
| D. E. Shaw & Co. | 0.02% | Reduce -63.5% | 431,560 | $35.2M |
| Nuveen, LLC | 0.01% | Reduce -16.8% | 415,883 | $33.9M |
| Rhumbline Advisers | 0.02% | Reduce -7.3% | 374,897 | $30.6M |
| Eventide Asset Management, LLC | 0.40% | No change | 370,000 | $30.2M |
| American Century Companies Inc. | 0.01% | Reduce -44.1% | 364,211 | $29.7M |
| Millennium Management | 0.02% | New | 329,337 | $26.8M |
| LPL Financial LLC | 0.01% | Add +140.0% | 310,761 | $25.3M |
| Artisan Partners Limited Partnership | 0.04% | New | 310,706 | $25.3M |
| Marshall Wace, LLP | 0.02% | Add +69.9% | 305,031 | $24.9M |
| Sei Investments Co. | 0.02% | Add +47.9% | 300,619 | $24.5M |
| Nordea Investment Management AB | 0.02% | Reduce -7.3% | 284,175 | $23.6M |
| Russell Investments Group, Ltd. | 0.02% | Add +63.3% | 284,096 | $23.2M |
| Citigroup Inc. | 0.01% | Add +5.2% | 264,678 | $21.6M |
| California Public Employees Retirement System | 0.01% | Reduce -0.3% | 256,314 | $20.9M |
| Squarepoint Ops LLC | 0.04% | New | 255,907 | $20.9M |
| Envestnet Asset Management Inc. | 0.00% | Add +280.9% | 254,228 | $20.7M |
| Aberdeen Group plc | 0.03% | Reduce -30.8% | 251,968 | $20.5M |
| Swiss National Bank | 0.01% | Reduce -1.3% | 238,900 | $19.5M |
| Legal & General Group Plc | 0.00% | Add +3.5% | 237,216 | $19.3M |
| Privium Fund Management B.V. | 3.51% | Reduce -36.2% | 234,222 | $19.1M |
| Arrowstreet Capital, Limited Partnership | 0.01% | Reduce -62.9% | 218,133 | $17.8M |
| Life Cycle Investment Partners Ltd | 0.08% | New | 209,068 | $17.0M |
| HSBC Holdings PLC | 0.01% | Add +34.9% | 203,800 | $16.8M |
| Assenagon Asset Management S.A. | 0.02% | Add +243.8% | 201,927 | $16.5M |
| Woodline Partners LP | 0.05% | No change | 200,184 | $16.3M |
| Integral Health Asset Management, LLC | 0.67% | Reduce -33.3% | 200,000 | $16.3M |
| Jane Street Group, LLC | 0.01% | Add +1143.8% | 196,205 | $16.0M |
| AQR Capital Management | 0.01% | Add +18.9% | 198,842 | $15.8M |
| Mutual of America Capital Management LLC | 0.15% | Add +3.9% | 191,432 | $15.6M |
| Pinnacle Associates Ltd. | 0.15% | Reduce -3.0% | 170,131 | $13.9M |
| Raymond James Financial Inc. | 0.00% | Reduce -6.9% | 169,913 | $13.8M |
| WCM Investment Management, LLC | 0.03% | Reduce -0.2% | 171,232 | $13.8M |
| SEB Asset Management AB | 0.05% | No change | 158,205 | $12.9M |
| Clearbridge Investments, LLC | 0.01% | Reduce -22.4% | 157,110 | $12.8M |
| Ameriprise Financial Inc. | 0.00% | Reduce -18.4% | 155,908 | $12.7M |
| Affinity Asset Advisors, LLC | 0.61% | Reduce -25.0% | 150,000 | $12.2M |
| Deutsche Bank AG | 0.00% | Reduce -42.6% | 149,240 | $12.2M |
| Wealth Effects LLC | 3.24% | Add +2.8% | 147,300 | $12.0M |
| Retirement Systems of Alabama | 0.04% | Reduce -15.1% | 145,687 | $11.9M |
| Toronto Dominion Bank | 0.02% | Reduce -3.6% | 144,928 | $11.8M |
| HighTower Advisors, LLC | 0.01% | Reduce -4.1% | 140,394 | $11.4M |
| California State Teachers Retirement System | 0.01% | Reduce -3.1% | 139,826 | $11.4M |
| Weiss Asset Management LP | 0.19% | New | 134,014 | $10.9M |
| Bank of Nova Scotia | 0.02% | Reduce -1.6% | 133,805 | $10.9M |
| Alliancebernstein L.P. | 0.00% | Reduce -38.2% | 173,265 | $10.9M |
| PFM Health Sciences, LP | 0.93% | Add +104.8% | 131,667 | $10.7M |
| Tetragon Partners GP Ltd | 1.73% | Add +2.6% | 130,484 | $10.6M |
| Wells Fargo & Company | 0.00% | Reduce -18.7% | 128,789 | $10.5M |
| Rhenman & Partners Asset Management AB | 0.98% | Reduce -11.4% | 128,000 | $10.4M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.01% | Add +5.4% | 119,102 | $9.7M |
| Catalyst Funds Management Pty Ltd | 0.54% | New | 117,600 | $9.6M |
| New York State Teachers Retirement System | 0.02% | Reduce -6.3% | 116,948 | $9.5M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.01% | Reduce -3.2% | 116,393 | $9.5M |
"% of holder's portfolio" is ARWR's weight in each manager's 13F, not the share of Arrowhead Pharmaceuticals Inc. the manager owns.