ARWR Institutional Ownership & Shareholders
ARROWHEAD PHARMACEUTICALS IN (ARWR) is currently held by 483 institutional investors tracked by InsiderSet, with a combined reported market value of approximately $9.57B based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026.
Blackrock, Inc. is currently the largest disclosed institutional shareholder of ARWR tracked by InsiderSet, reporting ownership valued at approximately $1.21B in its June 30, 2026 SEC Form 13F filing. Based on current market prices and the latest disclosed share count, the position is now estimated to be worth approximately $888.35M, representing an estimated loss of -26.51% since the filing period.
The top 10 institutional shareholders tracked on this page collectively account for approximately 57% of the total disclosed ARWR value among the investors covered in this analysis. Major shareholders include Blackrock, Inc., Avoro Capital Advisors Llc, Fmr Llc, and several other long-term asset managers with concentrated positions in ARROWHEAD PHARMACEUTICALS IN (ARWR).
This page ranks the largest institutional ARWR shareholders using publicly disclosed SEC Form 13F data, including reported values, estimated current holding values, portfolio allocation percentages, ownership concentration metrics, and historical holding changes across major hedge funds and investment firms.
Institutional Holders
483
Total Reported Value
$9.57B
Largest Holder
Blackrock, Inc.
Largest Position
$1.21B
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
80
Funds Exiting Positions
0
| Name | Investor/Manager | Portfolio % | Quantity | Reported Balance | Current Estimated Value | Gain/loss Since Filing | Estimated Portfolio Performance |
|---|---|---|---|---|---|---|---|
| Blackrock, Inc. | 0.02% | 14,830,553 | $1,208,838,379 | $888,350,125 | -$320,488,254 | -26.51% | |
| Avoro Capital Advisors Llc | 8.31% | 11,355,555 | $925,591,288 | $680,197,745 | -$245,393,544 | -26.51% | |
| Fmr Llc | 0.03% | 8,039,804 | $655,324,429 | $481,584,260 | -$173,740,169 | -26.51% | |
| Vanguard Portfolio Management Llc | 0.02% | 6,351,355 | $517,698,946 | $380,446,165 | -$137,252,782 | -26.51% | |
| Vanguard Capital Management Llc | 0.01% | 6,110,953 | $498,103,779 | $366,046,085 | -$132,057,694 | -26.51% | |
| State Street Corp | 0.01% | 5,694,640 | $464,170,106 | $341,108,936 | -$123,061,170 | -26.51% | |
| Norges Bank | 0.03% | 3,896,536 | $317,606,649 | $233,402,506 | -$84,204,143 | -26.51% | |
| Invesco Ltd. | 0.03% | 3,883,976 | $316,582,884 | $232,650,162 | -$83,932,722 | -26.51% | |
| Geode Capital Management, Llc | 0.02% | 3,530,612 | $298,813,042 | $211,483,659 | -$87,329,383 | -29.23% | |
| Fred Alger Management, Llc | 0.90% | 3,301,919 | $269,139,418 | $197,784,948 | -$71,354,470 | -26.51% | |
| Baker Bros. Advisors Lp | 0.81% | 1,992,783 | $162,431,742 | $119,367,702 | -$43,064,040 | -26.51% | |
| Siren, L.L.C. | 2.84% | 1,715,476 | $139,828,449 | $102,757,012 | -$37,071,437 | -26.51% | |
| Vestal Point Capital, Lp | 3.00% | 1,575,000 | $128,378,250 | $94,342,500 | -$34,035,750 | -26.51% | |
| Deerfield Management Company, L.P. | 1.18% | 1,389,055 | $113,221,873 | $83,204,395 | -$30,017,479 | -26.51% | |
| First Trust Advisors Lp | 0.06% | 1,352,918 | $110,276,346 | $81,039,788 | -$29,236,558 | -26.51% | |
| Driehaus Capital Management Llc | 0.64% | 1,350,556 | $110,083,820 | $80,898,304 | -$29,185,516 | -26.51% | |
| Northern Trust Corp | 0.01% | 1,192,868 | $97,230,671 | $71,452,793 | -$25,777,878 | -26.51% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,181,608 | $96,310,585 | $70,778,319 | -$25,532,266 | -26.51% | |
| Goldman Sachs Group Inc | 0.01% | 1,150,007 | $93,737,071 | $68,885,419 | -$24,851,652 | -26.51% | |
| Bank Of America Corp | 0.01% | 1,139,810 | $92,905,915 | $68,274,619 | -$24,631,296 | -26.51% | |
| Hood River Capital Management Llc | 0.66% | 1,120,747 | $91,352,088 | $67,132,745 | -$24,219,343 | -26.51% | |
| Holocene Advisors, Lp | 0.21% | 1,106,177 | $90,164,487 | $66,260,002 | -$23,904,485 | -26.51% | |
| Janus Henderson Group Plc | 0.04% | 1,436,990 | $90,119,095 | $86,075,701 | -$4,043,394 | -4.49% | |
| Morgan Stanley | 0.00% | 1,084,835 | $88,425,108 | $64,981,617 | -$23,443,492 | -26.51% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 1,330,996 | $83,453,449 | $79,726,660 | -$3,726,789 | -4.47% | |
| Fisher Asset Management, Llc | 0.02% | 957,691 | $78,061,392 | $57,365,691 | -$20,695,701 | -26.51% | |
| Charles Schwab Investment Management Inc | 0.01% | 923,927 | $75,309,290 | $55,343,227 | -$19,966,063 | -26.51% | |
| Vanguard Fiduciary Trust Co | 0.02% | 896,738 | $73,093,114 | $53,714,606 | -$19,378,508 | -26.51% | |
| Ubs Group Ag | 0.01% | 861,520 | $70,222,495 | $51,605,048 | -$18,617,447 | -26.51% | |
| Bank Of New York Mellon Corp | 0.01% | 859,538 | $70,060,927 | $51,486,326 | -$18,574,601 | -26.51% | |
| Price T Rowe Associates Inc | 0.01% | 853,360 | $69,558,000 | $51,116,264 | -$18,441,736 | -26.51% | |
| Summit Partners Public Asset Management, Llc | 1.76% | 830,247 | $67,673,433 | $49,731,795 | -$17,941,638 | -26.51% | |
| Western Financial Corp/Ca | 17.87% | 820,239 | $53,684,643 | $49,132,316 | -$4,552,327 | -8.48% | |
| Jpmorgan Chase & Co | 0.00% | 637,399 | $51,770,437 | $38,180,200 | -$13,590,237 | -26.25% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.10% | 625,569 | $50,990,129 | $37,471,583 | -$13,518,546 | -26.51% | |
| Susquehanna International Group, Llp | 0.04% | 596,573 | $48,626,665 | $35,734,723 | -$12,891,942 | -26.51% | |
| Two Sigma Investments, Lp | 0.04% | 580,609 | $47,325,440 | $34,778,479 | -$12,546,961 | -26.51% | |
| Pictet Asset Management Holding Sa | 0.04% | 573,419 | $46,708,118 | $34,347,798 | -$12,360,320 | -26.46% | |
| Bnp Paribas Financial Markets | 0.02% | 558,643 | $45,534,991 | $33,462,716 | -$12,072,275 | -26.51% | |
| Lord, Abbett & Co. Llc | 0.13% | 540,466 | $44,053,000 | $32,373,913 | -$11,679,087 | -26.51% | |
| 1832 Asset Management L.P. | 0.05% | 538,500 | $43,893,135 | $32,256,150 | -$11,636,985 | -26.51% | |
| Hrt Financial Lp | 0.07% | 498,655 | $40,645,000 | $29,869,435 | -$10,775,566 | -26.51% | |
| Voya Investment Management Llc | 0.03% | 483,495 | $39,409,678 | $28,961,351 | -$10,448,328 | -26.51% | |
| Balyasny Asset Management L.P. | 0.07% | 470,754 | $38,371,158 | $28,198,165 | -$10,172,993 | -26.51% | |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 468,921 | $38,221,751 | $28,088,368 | -$10,133,383 | -26.51% |
| D. E. Shaw & Co., Inc. | 0.02% | 431,560 | $35,176,456 | $25,850,444 | -$9,326,012 | -26.51% | |
| Nuveen, Llc | 0.01% | 415,883 | $33,898,624 | $24,911,392 | -$8,987,232 | -26.51% | |
| Rhumbline Advisers | 0.02% | 374,897 | $30,557,778 | $22,456,330 | -$8,101,448 | -26.51% | |
| Eventide Asset Management, Llc | 0.40% | 370,000 | $30,158,700 | $22,163,000 | -$7,995,700 | -26.51% | |
| American Century Companies Inc | 0.01% | 364,211 | $29,687,001 | $21,816,239 | -$7,870,762 | -26.51% |
Frequently asked questions about ARWR
Who are the largest institutional holders of ARWR?
The largest institutional holders of ARWR reported in the latest SEC Form 13F filings include Blackrock, Inc., Avoro Capital Advisors Llc, Fmr Llc, Vanguard Portfolio Management Llc, and Vanguard Capital Management Llc. InsiderSet ranks institutional holders by their latest reported ARWR position.
What is ARWR institutional ownership?
This page tracks ARWR positions reported by institutional investment managers through SEC Form 13F. ARROWHEAD PHARMACEUTICALS IN (ARWR) institutional ownership on InsiderSet reflects disclosed 13F holdings among the managers we analyze, not every shareholder of the stock.
How many institutions own ARWR?
InsiderSet currently tracks 483 institutional managers reporting ARWR holdings in the latest available 13F data. This count reflects institutions included in the SEC Form 13F filings analyzed by InsiderSet and should not be interpreted as the total number of ARWR shareholders.
How much ARWR stock do institutions own?
Institutional investment managers disclosed approximately $9.57B in ARWR holdings for Q2 2026. This figure is reported 13F value as of the filing period, not necessarily today's market value.
When was ARWR institutional ownership last updated?
The latest ARWR institutional ownership data on InsiderSet is based on SEC Form 13F filings for the quarter ended June 30, 2026. Form 13F filings are generally reported after the quarter ends, so the holdings shown represent the latest publicly disclosed positions rather than real-time institutional holdings.
Are institutional ARWR holdings real-time?
No. Form 13F data is not real-time. It represents positions reported by institutional investment managers as of the end of the reporting quarter. An institution may have changed its ARWR position after the reporting date.
Are institutions buying or selling ARWR?
Institutional buying and selling can be analyzed by comparing ARWR positions across consecutive 13F reporting periods. InsiderSet's ARWR Ownership Changes page shows institutions that increased, reduced, initiated, or exited positions based on reported 13F holdings. View ARWR ownership changes.
How has ARWR institutional ownership changed over time?
InsiderSet tracks ARWR institutional holdings across multiple 13F reporting periods, allowing investors to compare institutional holder counts, reported value, and reported shares over time.