Arrowhead PharmaceuticalsARWR
13F holders, Q1 2026 (March 31)437holders +36
94new positions
59sold out
7famous investors
$62.70avg. 13F price*
At the end of Q1 2026, 437 institutions reported holding Arrowhead Pharmaceuticals Inc. (ARWR) in their 13F filings, up 36 from Q4 2025. 94 opened new positions and 59 sold out. The largest holders were BlackRock, Inc. ($1.1B), Avoro Capital Advisors LLC ($670.9M) and FMR LLC ($455.6M). 7 famous investors held it, including Jim Simons / Peter Brown (0.1% of Renaissance Technologies's portfolio), David E. Shaw (0.1% of D. E. Shaw & Co.'s portfolio) and Ray Dalio (0.0% of Bridgewater Associates's portfolio).
- Company
- Arrowhead Pharmaceuticals Inc.
- CUSIP
- 04280A100
- Latest filing quarter
- Q2 2026
History
Number of 13F holders
Total Exit/New Position Q4 2025 → Q1 2026
| Institutions | Total Value | |
|---|---|---|
| New Positions | 94 | $292.8M |
| Exits | 59 | $331.3M |
All 13F filers, Q4 2025 → Q1 2026: 21,890,716 shares bought and 14,486,416 shares sold, net +7,404,300 shares. Counts holders who added, trimmed, opened or closed a position; split-adjusted.
Ownership 437 holders
| BlackRock, Inc. | 0.02% | Reduce -14.8% | 18,161,519 | $1.1B |
| Avoro Capital Advisors LLC | 6.61% | Add +0.7% | 10,699,999 | $670.9M |
| FMR LLC | 0.02% | Add +11.4% | 7,266,652 | $455.6M |
| Vanguard Portfolio Management LLC | 0.02% | — | 7,146,136 | $448.1M |
| State Street Corp. | 0.01% | Add +1.4% | 6,496,130 | $407.3M |
| Vanguard Capital Management LLC | 0.01% | — | 6,032,416 | $378.2M |
| Geode Capital Management, LLC | 0.02% | Add +31.1% | 4,278,828 | $274.5M |
| Fred Alger Management, LLC | 0.92% | Add +82.3% | 3,342,493 | $209.6M |
| Invesco Ltd. | 0.02% | Add +498.9% | 3,280,647 | $205.7M |
| Vestal Point Capital, LP | 3.99% | Add +152.8% | 2,275,000 | $142.6M |
| Baker Bros. Advisors LP | 0.72% | Reduce -8.4% | 1,992,783 | $124.9M |
| Goldman Sachs Group Inc. | 0.01% | Add +3.7% | 1,739,923 | $109.1M |
| Northern Trust Corp. | 0.01% | Add +23.0% | 1,655,837 | $103.8M |
| Siren, L.L.C. | 2.81% | Add +7.7% | 1,615,476 | $101.3M |
| Deerfield Management Company, L.P. | 1.37% | Reduce -14.2% | 1,573,297 | $98.6M |
| Janus Henderson Group PLC | 0.04% | Add +12.2% | 1,436,990 | $90.1M |
| UBS Group AG | 0.01% | Add +35.4% | 1,336,271 | $83.8M |
| UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC | 0.02% | Add +5.6% | 1,330,996 | $83.5M |
| Pictet Asset Management Holding SA | 0.08% | Add +23.8% | 1,273,266 | $79.6M |
| Charles Schwab Investment Management Inc. | 0.01% | Reduce -11.9% | 1,192,085 | $74.7M |
| Driehaus Capital Management LLC | 0.55% | Reduce -32.7% | 1,190,335 | $74.6M |
| D. E. Shaw & Co. | 0.06% | Add +710.5% | 1,183,838 | $74.2M |
| Fisher Asset Management | 0.02% | Reduce -15.1% | 1,113,568 | $69.8M |
| Bank of America Corp. | 0.00% | Add +71.1% | 1,064,455 | $66.7M |
| Hood River Capital Management LLC | 0.66% | New | 1,056,534 | $66.2M |
| T. Rowe Price Associates Inc. | 0.01% | Add +24.4% | 1,043,732 | $65.4M |
| Renaissance Technologies | 0.10% | New | 1,036,495 | $65.0M |
| Vanguard Fiduciary Trust Co. | 0.02% | — | 965,775 | $60.6M |
| Morgan Stanley | 0.00% | Reduce -34.9% | 960,507 | $60.2M |
| Bank of New York Mellon Corp | 0.01% | Add +8.1% | 960,144 | $60.2M |
| Connor, Clark & Lunn Investment Management Ltd. | 0.12% | Add +26.2% | 836,981 | $52.5M |
| Western Financial Corp | 20.13% | No change | 820,239 | $51.4M |
| Voya Investment Management LLC | 0.05% | Add +55.2% | 656,129 | $41.1M |
| American Century Companies Inc. | 0.02% | Add +8315.7% | 651,544 | $40.9M |
| BNP Paribas Financial Markets | 0.03% | Add +1510.5% | 650,599 | $40.8M |
| JPMorgan Chase & Co. | 0.00% | Add +11.6% | 683,068 | $39.4M |
| Dimensional Fund Advisors LP | 0.01% | Add +312.8% | 608,531 | $38.1M |
| Arrowstreet Capital, Limited Partnership | 0.02% | Reduce -71.9% | 587,125 | $36.8M |
| RTW Investments, LP | 0.37% | Add +0.2% | 585,682 | $36.7M |
| Summit Partners Public Asset Management, LLC | 1.57% | Add +14.9% | 540,144 | $33.9M |
| Nuveen, LLC | 0.01% | Add +73.2% | 499,837 | $31.3M |
| Principal Financial Group Inc. | 0.02% | Reduce -31.5% | 490,122 | $30.7M |
| Alyeska Investment Group, L.P. | 0.08% | Add +26.0% | 472,870 | $29.6M |
| Franklin Resources Inc. | 0.01% | Add +331.0% | 462,707 | $29.0M |
| Panagora Asset Management Inc. | 0.11% | Add +1182.7% | 461,193 | $28.9M |
| Rhumbline Advisers | 0.02% | Add +14.8% | 404,436 | $25.4M |
| Susquehanna International Group, LLP | 0.03% | Add +1210.3% | 378,833 | $23.8M |
| Eventide Asset Management, LLC | 0.38% | No change | 370,000 | $23.2M |
| Privium Fund Management B.V. | 4.79% | Reduce -7.8% | 366,936 | $23.0M |
| Aberdeen Group plc | 0.04% | Add +27.2% | 363,972 | $22.8M |
| Canada Pension Plan Investment Board | 0.01% | Add +1038.8% | 325,700 | $20.4M |
| Lord, Abbett & Co. LLC | 0.07% | New | 312,824 | $19.6M |
| Integral Health Asset Management, LLC | 1.00% | Add +200.0% | 300,000 | $18.8M |
| Alliancebernstein L.P. | 0.01% | Add +62.4% | 280,394 | $18.6M |
| Nordea Investment Management AB | 0.02% | Reduce -5.5% | 306,439 | $18.6M |
| Trexquant Investment LP | 0.13% | Add +10.4% | 277,114 | $17.4M |
| Deutsche Bank AG | 0.01% | Add +7.4% | 259,963 | $16.3M |
| California Public Employees Retirement System | 0.01% | New | 257,133 | $16.1M |
| Citigroup Inc. | 0.01% | Add +488.6% | 251,568 | $15.8M |
| Swiss National Bank | 0.01% | Reduce -1.4% | 242,000 | $15.2M |
| Legal & General Group Plc | 0.00% | Reduce -42.0% | 229,097 | $14.4M |
| Balyasny Asset Management L.P. | 0.03% | Reduce -45.1% | 206,412 | $12.9M |
| Neuberger Berman Group LLC | 0.01% | Add +103.1% | 203,914 | $12.8M |
| Sei Investments Co. | 0.01% | Add +81.0% | 203,220 | $12.7M |
| Clearbridge Investments, LLC | 0.01% | Reduce -2.8% | 202,347 | $12.7M |
| Woodline Partners LP | 0.05% | Reduce -50.0% | 200,184 | $12.6M |
| Affinity Asset Advisors, LLC | 0.75% | Add +185.7% | 200,000 | $12.5M |
| Longaeva Partners L.P. | 0.59% | New | 194,589 | $12.2M |
| Ameriprise Financial Inc. | 0.00% | Reduce -25.8% | 191,054 | $12.0M |
| Mutual of America Capital Management LLC | 0.13% | Add +1066.3% | 184,304 | $11.6M |
| Raymond James Financial Inc. | 0.00% | Reduce -8.0% | 182,555 | $11.4M |
| Marshall Wace, LLP | 0.01% | Add +45.0% | 179,573 | $11.3M |
| Pinnacle Associates Ltd. | 0.14% | Reduce -8.5% | 175,456 | $11.0M |
| Russell Investments Group, Ltd. | 0.01% | Add +42.5% | 173,995 | $10.9M |
| Retirement Systems of Alabama | 0.04% | New | 171,672 | $10.8M |
| AQR Capital Management | 0.00% | Add +13.5% | 167,210 | $10.3M |
| Manufacturers Life Insurance Company, The | 0.01% | Add +63.4% | 160,422 | $10.1M |
| Wells Fargo & Company | 0.00% | Add +3.9% | 158,398 | $9.9M |
| SEB Asset Management AB | 0.04% | — | 158,205 | $9.9M |
| WCM Investment Management, LLC | 0.02% | Add +23.5% | 171,575 | $9.9M |
| HSBC Holdings PLC | 0.01% | New | 151,046 | $9.5M |
| Toronto Dominion Bank | 0.02% | New | 150,278 | $9.4M |
| First Trust Advisors LP | 0.01% | Reduce -37.3% | 149,148 | $9.4M |
| Schroder Investment Management Group | 0.01% | New | 162,005 | $9.3M |
| HighTower Advisors, LLC | 0.01% | Add +9.9% | 146,462 | $9.2M |
| Rhenman & Partners Asset Management AB | 1.12% | No change | 144,500 | $9.1M |
| California State Teachers Retirement System | 0.01% | Add +21.9% | 144,313 | $9.0M |
| Wealth Effects LLC | 3.18% | No change | 143,300 | $9.0M |
| MetLife Investment Management, LLC | 0.04% | Add +92.2% | 140,404 | $8.8M |
| MIRAE ASSET GLOBAL ETFS HOLDINGS Ltd. | 0.01% | Add +4.3% | 139,598 | $8.7M |
| Empowered Funds, LLC | 0.05% | Add +661.6% | 137,220 | $8.6M |
| Bank of Nova Scotia | 0.01% | New | 135,960 | $8.5M |
| LPL Financial LLC | 0.00% | Add +29.1% | 129,499 | $8.1M |
| Tetragon Partners GP Ltd | 1.57% | Add +31.2% | 127,198 | $8.0M |
| New York State Teachers Retirement System | 0.02% | Reduce -16.6% | 124,853 | $7.8M |
| Universal- Beteiligungs- und Servicegesellschaft mbH | 0.01% | Reduce -24.6% | 120,238 | $7.5M |
| Barclays PLC | 0.00% | Reduce -64.2% | 115,343 | $7.2M |
| VANGUARD ASSET MANAGEMENT, Ltd | 0.01% | — | 112,971 | $7.1M |
| Silvercrest Asset Management Group LLC | 0.05% | Reduce -31.6% | 108,413 | $6.8M |
| Cormorant Asset Management, LP | 0.32% | New | 100,000 | $6.3M |
"% of holder's portfolio" is ARWR's weight in each manager's 13F, not the share of Arrowhead Pharmaceuticals Inc. the manager owns.