Arrowhead Pharmaceuticals ARWR Institutional Ownership

NASDAQ ARWR

$65.45 -0.80 (-1.21%)

At close: Sep 30, 2026 · 4:00 PM EDT

Institutions by Trading Activity

500 Institutions

Increased 281 56.2%

Unchanged 66 13.2%

Reduced 153 30.6%

Ownership Statistics

13F · as of 30 Jun, 2026

Institutional Ownership

83.85%

▼-0.97 pp QoQ

Shares Held by Institutions

120.22Mn

of 143.38Mn outstanding

▲+2.64% QoQ

Shares Outstanding

143.38Mn

23.16Mn held outside 13F filers

Institutional Investors

500

filed 13F for Jun 2026

▲+66 vs prior quarter

Net Shares Added (QoQ)

+3.09Mn

accumulated since last quarter

Value of Holdings

$7.87Bn

reported market value

Shares Owned by Institutions

Shares held % of outstanding

Latest —

Average ownership —

Peak ownership —

Shares Purchased/Sold by Institutions

Accumulated Distributed

Latest quarter —

Net over range —

Accumulating quarters —

Ownership Summary

Quarter ending 30 Jun, 2026

Arrowhead Pharmaceuticals, Inc. (NASDAQ:ARWR) appears in 500 institutional 13F filings for the quarter ending June 2026.

These investors collectively held 83.8% of Arrowhead Pharmaceuticals's outstanding shares in June 2026, down from 84.8% in March 2026.
Their total shares held in ARWR increased 2.64% from the prior quarter, while the number of investors in Arrowhead Pharmaceuticals increased 78.57% year over year.
Among the 500 funds, 281 bought more Arrowhead Pharmaceuticals shares, 153 sold down, and 66 held their ground.
In total, institutional investors held 120.22Mn shares in Arrowhead Pharmaceuticals as of June 2026, up by 3.09Mn shares quarter on quarter, and up 16.43Mn shares year over year.
BlackRock, Inc. leads ownership in ARWR with 14.83Mn shares as of June 30, 2026, equal to 10.34% of outstanding shares.
The largest buyers of Arrowhead Pharmaceuticals for the quarter ending June 2026 were NORGES BANK (3.9Mn), Jupiter Topco LLC (1.22Mn), FIRST TRUST ADVISORS LP (1.2Mn), Holocene Advisors, LP (1.11Mn), Sixth Street Partners Management Company, L.P. (923.93K).
The biggest sellers of Arrowhead Pharmaceuticals for the quarter ending June 2026 included BlackRock, Inc. (3.33Mn), State Street Corp (801.49K), VANGUARD PORTFOLIO MANAGEMENT LLC (794.78K), D. E. Shaw & Co., Inc. (752.28K), GEODE CAPITAL MANAGEMENT, LLC (748.22K).
Per Business Quant, the top 10 investors in ARWR for the quarter ending June 2026 include BlackRock, Inc. (14.83Mn), Avoro Capital Advisors LLC (11.36Mn), FMR LLC (8.04Mn), VANGUARD PORTFOLIO MANAGEMENT LLC (6.35Mn), VANGUARD CAPITAL MANAGEMENT LLC (6.11Mn), State Street Corp (5.69Mn), NORGES BANK (3.9Mn), Invesco Ltd. (3.88Mn), GEODE CAPITAL MANAGEMENT, LLC (3.53Mn), FRED ALGER MANAGEMENT, LLC (3.3Mn).

Form 13F Holdings

499 Institutional Holders

Report period 30 Jun, 2026

Total shares held 120.22Mn

Of outstanding 83.85%

#	Institution	CIK	Shares Held	% of Outstanding	Change (QoQ)	Change (%)	Value (USD)
1	BlackRock, Inc.	0002012383	14,830,553	10.34%	▼3,330,966	-18.34%	$1.21Bn
2	Avoro Capital Advisors LLC	0001633313	11,355,555	7.92%	▲655,556	+6.13%	$925.59Mn
3	FMR LLC	0000315066	8,039,804	5.61%	▲773,152	+10.64%	$655.32Mn
4	VANGUARD PORTFOLIO MANAGEMENT LLC	0002100121	6,351,355	4.43%	▼794,781	-11.12%	$517.70Mn
5	VANGUARD CAPITAL MANAGEMENT LLC	0002100119	6,110,953	4.26%	▲78,537	+1.30%	$498.10Mn
6	State Street Corp	0000093751	5,694,640	3.97%	▼801,490	-12.34%	$464.17Mn
7	NORGES BANK	0001374170	3,896,536	2.72%	▲3,896,536	0.00%	$317.61Mn
8	Invesco Ltd.	0000914208	3,883,976	2.71%	▲603,329	+18.39%	$316.58Mn
9	GEODE CAPITAL MANAGEMENT, LLC	0001214717	3,530,612	2.46%	▼748,216	-17.49%	$298.81Mn
10	FRED ALGER MANAGEMENT, LLC	0000003520	3,301,919	2.30%	▼40,574	-1.21%	$269.14Mn
11	BAKER BROS. ADVISORS LP	0001263508	1,992,783	1.39%	0	0.00%	$162.43Mn
12	Siren, L.L.C.	0002005245	1,715,476	1.20%	▲100,000	+6.19%	$139.83Mn
13	Vestal Point Capital, LP	0001974915	1,575,000	1.10%	▼700,000	-30.77%	$128.38Mn
14	DEERFIELD MANAGEMENT COMPANY, L.P.	0001009258	1,389,055	0.97%	▼184,242	-11.71%	$113.22Mn
15	FIRST TRUST ADVISORS LP	0001125816	1,352,918	0.94%	▲1,203,770	+807.10%	$110.28Mn
16	DRIEHAUS CAPITAL MANAGEMENT LLC	0000938206	1,350,556	0.94%	▲160,221	+13.46%	$110.08Mn
17	Jupiter Topco LLC	0002146052	1,221,596	0.85%	▲1,221,596	0.00%	$99.62Mn
18	Northern Trust Corp	0000073124	1,192,868	0.83%	▼462,969	-27.96%	$97.23Mn
19	DIMENSIONAL FUND ADVISORS LP	0000354204	1,181,608	0.82%	▲573,077	+94.17%	$96.31Mn
20	Goldman Sachs Group Inc	0000886982	1,150,007	0.80%	▼589,916	-33.90%	$93.74Mn

Showing 1 to 20 of 499 holders