ARROWHEAD PHARMACEUTICALS IN (ARWR) Institutional Shareholders
ARROWHEAD PHARMACEUTICALS IN (ARWR) is currently reported in institutional portfolios tracked by InsiderSet based on the latest available SEC Form 13F filings for the quarter ended June 30, 2026. The institutional investors covered on this page collectively reported approximately $9.65B in ARWR holdings during the latest filing period.
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 $975.70M, representing an estimated loss of -19.29% 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
484
Total Reported Value
$9.65B
Largest Holder
Blackrock, Inc.
Largest Position
$1.21B
Insider Transactions (90d)
2
Latest Filing Quarter
Q2 2026
New Institutional Positions
82
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 | $975,702,082 | -$233,136,297 | -19.29% | |
| Avoro Capital Advisors Llc | 8.31% | 11,355,555 | $925,591,288 | $747,081,963 | -$178,509,325 | -19.29% | |
| Fmr Llc | 0.03% | 8,039,804 | $655,324,429 | $528,938,705 | -$126,385,724 | -19.29% | |
| Vanguard Portfolio Management Llc | 0.02% | 6,351,355 | $517,698,946 | $417,855,645 | -$99,843,301 | -19.29% | |
| Vanguard Capital Management Llc | 0.01% | 6,110,953 | $498,103,779 | $402,039,598 | -$96,064,181 | -19.29% | |
| State Street Corp | 0.01% | 5,694,640 | $464,170,106 | $374,650,366 | -$89,519,740 | -19.29% | |
| Norges Bank | 0.03% | 3,896,536 | $317,606,649 | $256,353,103 | -$61,253,546 | -19.29% | |
| Invesco Ltd. | 0.03% | 3,883,976 | $316,582,884 | $255,526,781 | -$61,056,103 | -19.29% | |
| Geode Capital Management, Llc | 0.02% | 3,530,612 | $298,813,042 | $232,278,963 | -$66,534,079 | -22.27% | |
| Fred Alger Management, Llc | 0.90% | 3,301,919 | $269,139,418 | $217,233,251 | -$51,906,167 | -19.29% | |
| Baker Bros. Advisors Lp | 0.81% | 1,992,783 | $162,431,742 | $131,105,194 | -$31,326,548 | -19.29% | |
| Siren, L.L.C. | 2.84% | 1,715,476 | $139,828,449 | $112,861,166 | -$26,967,283 | -19.29% | |
| Vestal Point Capital, Lp | 3.00% | 1,575,000 | $128,378,250 | $103,619,250 | -$24,759,000 | -19.29% | |
| Deerfield Management Company, L.P. | 1.18% | 1,389,055 | $113,221,873 | $91,385,928 | -$21,835,945 | -19.29% | |
| First Trust Advisors Lp | 0.06% | 1,352,918 | $110,276,346 | $89,008,475 | -$21,267,871 | -19.29% | |
| Driehaus Capital Management Llc | 0.64% | 1,350,556 | $110,083,820 | $88,853,079 | -$21,230,741 | -19.29% | |
| Northern Trust Corp | 0.01% | 1,192,868 | $97,230,671 | $78,478,786 | -$18,751,885 | -19.29% | |
| Dimensional Fund Advisors Lp | 0.02% | 1,181,608 | $96,310,585 | $77,737,990 | -$18,572,595 | -19.28% | |
| Goldman Sachs Group Inc | 0.01% | 1,150,007 | $93,737,071 | $75,658,961 | -$18,078,110 | -19.29% | |
| Bank Of America Corp | 0.01% | 1,139,810 | $92,905,915 | $74,988,100 | -$17,917,815 | -19.29% | |
| Hood River Capital Management Llc | 0.66% | 1,120,747 | $91,352,088 | $73,733,945 | -$17,618,143 | -19.29% | |
| Holocene Advisors, Lp | 0.21% | 1,106,177 | $90,164,487 | $72,775,385 | -$17,389,102 | -19.29% | |
| Janus Henderson Group Plc | 0.04% | 1,436,990 | $90,119,095 | $94,539,572 | +$4,420,477 | +4.91% | |
| Morgan Stanley | 0.00% | 1,084,835 | $88,425,108 | $71,371,295 | -$17,053,813 | -19.29% | |
| Ubs Am, A Distinct Business Unit Of Ubs Asset Management Americas Llc | 0.02% | 1,330,996 | $83,453,449 | $87,566,227 | +$4,112,778 | +4.93% | |
| Fisher Asset Management, Llc | 0.02% | 957,691 | $78,061,392 | $63,006,491 | -$15,054,901 | -19.29% | |
| Charles Schwab Investment Management Inc | 0.01% | 923,927 | $75,309,290 | $60,785,157 | -$14,524,133 | -19.29% | |
| Vanguard Fiduciary Trust Co | 0.02% | 896,738 | $73,093,114 | $58,996,393 | -$14,096,721 | -19.29% | |
| Ubs Group Ag | 0.01% | 861,520 | $70,222,495 | $56,679,401 | -$13,543,094 | -19.29% | |
| Bank Of New York Mellon Corp | 0.01% | 859,538 | $70,060,927 | $56,549,005 | -$13,511,922 | -19.29% | |
| Price T Rowe Associates Inc | 0.01% | 853,360 | $69,558,000 | $56,142,554 | -$13,415,446 | -19.29% | |
| Summit Partners Public Asset Management, Llc | 1.76% | 830,247 | $67,673,433 | $54,621,950 | -$13,051,483 | -19.29% | |
| Western Financial Corp/Ca | 19.58% | 820,239 | $66,857,681 | $53,963,524 | -$12,894,157 | -19.29% | |
| Jpmorgan Chase & Co | 0.00% | 637,399 | $51,770,437 | $41,934,480 | -$9,835,957 | -19.00% | |
| Connor, Clark & Lunn Investment Management Ltd. | 0.10% | 625,569 | $50,990,129 | $41,156,185 | -$9,833,944 | -19.29% | |
| Susquehanna International Group, Llp | 0.04% | 596,573 | $48,626,665 | $39,248,538 | -$9,378,127 | -19.29% | |
| Two Sigma Investments, Lp | 0.04% | 580,609 | $47,325,440 | $38,198,266 | -$9,127,174 | -19.29% | |
| Pictet Asset Management Holding Sa | 0.04% | 573,419 | $46,708,118 | $37,725,236 | -$8,982,882 | -19.23% | |
| Bnp Paribas Financial Markets | 0.02% | 558,643 | $45,534,991 | $36,753,123 | -$8,781,868 | -19.29% | |
| Lord, Abbett & Co. Llc | 0.13% | 540,466 | $44,053,000 | $35,557,258 | -$8,495,742 | -19.29% | |
| 1832 Asset Management L.P. | 0.05% | 538,500 | $43,893,135 | $35,427,915 | -$8,465,220 | -19.29% | |
| Principal Financial Group Inc | 0.02% | 514,658 | $41,949,773 | $33,859,350 | -$8,090,423 | -19.29% | |
| Hrt Financial Lp | 0.07% | 498,655 | $40,645,000 | $32,806,512 | -$7,838,488 | -19.29% | |
| Voya Investment Management Llc | 0.03% | 483,495 | $39,409,678 | $31,809,136 | -$7,600,542 | -19.29% | |
| Balyasny Asset Management L.P. | 0.07% | 470,754 | $38,371,158 | $30,970,906 | -$7,400,252 | -19.29% | |
| Renaissance Technologies LLC | Jim Simons | 0.05% | 468,921 | $38,221,751 | $30,850,313 | -$7,371,438 | -19.29% |
| D. E. Shaw & Co., Inc. | 0.02% | 431,560 | $35,176,456 | $28,392,332 | -$6,784,124 | -19.29% | |
| Nuveen, Llc | 0.01% | 415,883 | $33,898,624 | $27,360,943 | -$6,537,681 | -19.29% | |
| Rhumbline Advisers | 0.02% | 374,897 | $30,557,778 | $24,664,474 | -$5,893,304 | -19.29% | |
| Eventide Asset Management, Llc | 0.40% | 370,000 | $30,158,700 | $24,342,300 | -$5,816,400 | -19.29% |
Frequently asked questions about ARWR
Who owns the most ARWR stock?
The largest holders of ARWR are typically major institutional investors such as asset managers and hedge funds reporting on Form 13F. The table above ranks tracked superinvestors by reported position size using the latest available filings for ARROWHEAD PHARMACEUTICALS IN (ARWR).
Is ARWR widely held by superinvestors?
Many widely followed stocks like ARWR appear across numerous superinvestor portfolios because of liquidity, index inclusion, and fundamentals. The holder count and table above show how broadly ARWR is represented among the institutional managers we track.
What do “Current Estimated Value”, “Gain/loss Since Filing”, and “Estimated Portfolio Performance” mean?
Current Estimated Value is reported share quantity from the latest 13F times our most recent split-adjusted U.S. session close. Gain/loss Since Filing is that estimate minus the reported 13F dollar value; Estimated Portfolio Performance is that difference as a percent of the reported value. Green means the estimate is above the filing value; red means below (not purchase cost). If many filers share the same implied filing price per share, the performance % may match across rows. These are not official fund marks or live quotes.