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ARWR in the 13F filings

Arrowhead Pharmaceuticals In · CUSIP 04280A100

Sector · Pharmaceuticals and biotechnologyTheme · Healthcare: biopharma and medtech· L3VLUP-definedTheme · Pharmaceutical preparations
Quarter
Q2 2026Q1 2026Q4 2025Q3 2025Q2 2025Q1 2025Q4 2024Q3 2024Q2 2024Q1 2024Q4 2023Q3 2023
Quarter end
30 Jun 2026
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 3 Aug 2026
Managers listing it
29
at least, of 95 tracked, among listed positions
Comparable managers
91
filed both Q1 2026 and Q2 2026; 5 listed it in both
Shares listed
20,131,754
combined, among listed positions
Reported value
$1.6bn
combined, at the quarter end

AllianceBernstein LP. Values in this filing are at the previous quarter end's prices; its share count is the quarter end's.

Among the 91 comparable managers: 16 buyers (opened or added shares) and 16 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was +2,135,350.

Managers listing ARWR in Q2 2026

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q1 2026, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

29 of 29 holders

ActionFiling
Fidelity (FMR LLC)8,039,804$655munder 0.1%Added+773,15213 Aug 2026 (the filing on sec.gov)
Invesco Ltd3,883,976$317munder 0.1%Added+603,32914 Aug 2026 (the filing on sec.gov)
Janus Henderson Group Ltd1,221,596$100munder 0.1%Trimmed-215,39414 Aug 2026 (the filing on sec.gov)
Holocene Advisors LP1,106,177$90m0.20%Newnew14 Aug 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc853,360$70munder 0.1%Trimmed-190,37214 Aug 2026 (the filing on sec.gov)
Susquehanna International Group LLP596,573$49munder 0.1%Added+217,74014 Aug 2026 (the filing on sec.gov)
Two Sigma Investments LP580,609$47munder 0.1%Added+544,80914 Aug 2026 (the filing on sec.gov)
Balyasny Asset Management LLC470,754$38munder 0.1%Added+264,34214 Aug 2026 (the filing on sec.gov)
Renaissance Technologies LLC468,921$38m0.05%Trimmed-567,57413 Aug 2026 (the filing on sec.gov)
D. E. Shaw & Co.431,560$35munder 0.1%Trimmed-752,27814 Aug 2026 (the filing on sec.gov)
Millennium Management LLC329,337$27munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Artisan Partners LP310,706$25munder 0.1%Newnew13 Aug 2026 (the filing on sec.gov)
Marshall Wace LLP305,031$25munder 0.1%Added+125,45813 Aug 2026 (the filing on sec.gov)
Squarepoint Ops LLC255,907$21munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Arrowstreet Capital LP218,133$18munder 0.1%Trimmed-368,99213 Aug 2026 (the filing on sec.gov)
Woodline Partners LP200,184$16m0.05%Held014 Aug 2026 (the filing on sec.gov)
Jane Street Group LLC196,205$16munder 0.1%Added+180,43014 Aug 2026 (the filing on sec.gov)
AQR Capital Management LLC198,842$16munder 0.1%Added+31,63214 Aug 2026 (the filing on sec.gov)
AllianceBernstein LP173,265$11munder 0.1%Trimmed-107,12914 Aug 2026 (the filing on sec.gov)
Neuberger Berman Group LLC98,467$8.0munder 0.1%Trimmed-105,44727 Oct 2026 (the filing on sec.gov)
Brevan Howard Capital Management LP58,923$4.8munder 0.1%Newnew14 Aug 2026 (the filing on sec.gov)
Wellington Management Group LLP50,081$4.1munder 0.1%Trimmed-4,43714 Aug 2026 (the filing on sec.gov)
Hudson Bay Capital Management LP25,620$2.1munder 0.1%Trimmed-38,52314 Aug 2026 (the filing on sec.gov)
Acadian Asset Management LLC13,211$1.1munder 0.1%Trimmed-7,32413 Aug 2026 (the filing on sec.gov)
Quantbot Technologies LP10,831$883kunder 0.1%Added+1,87312 Aug 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q1 2026 to Q2 2026, among managers that listed it in both quarters or opened it.

Increases

Reductions

New positions and exits

At least these many: a manager is shown exiting only where its own filing shows the position gone.

New (7)

Exited (4)

Ownership over time

Every quarter on file. A quarter-end value moves with the price as well as with the shares held; buyers and sellers count comparable managers, by shares.
3 in Q3 2024 to 9 in Q2 2026

Tracked managers listing it, at least.

035810201820192020202120222023202420252026
the quarter shown share split complete books; unmarked quarters rest on listed positionsClick a quarter to open it.
ARWR by quarter
QuarterHoldersReported valueBuyersSellers
Q2 20171$476kn.a.n.a.
Q3 20171$618kn.a.n.a.
Q4 20171$1.2mn.a.n.a.
Q1 20183$4.6mn.a.n.a.
Q2 20182$2.5mn.a.n.a.
Q3 20181$181kn.a.n.a.
Q4 20181$19mn.a.n.a.
Q1 20192$37mn.a.n.a.
Q2 20192$54mn.a.n.a.
Q3 20191$18mn.a.n.a.
Q4 20197$302mn.a.n.a.
Q1 20206$69mn.a.n.a.
Q2 20205$260mn.a.n.a.
Q3 20204$221mn.a.n.a.
Q4 20205$372mn.a.n.a.
Q1 20215$336mn.a.n.a.
Q2 20216$253mn.a.n.a.
Q3 20215$133mn.a.n.a.
Q4 20213$249mn.a.n.a.
Q1 20225$161mn.a.n.a.
Q2 20223$122mn.a.n.a.
Q3 20223$118mn.a.n.a.
Q4 20222$121mn.a.n.a.
Q1 20234$69mn.a.n.a.
Q2 20234$67mn.a.n.a.
Q3 20233$62mn.a.n.a.
Q4 20234$87m31
Q1 20244$67m03
Q2 20244$61m22
Q3 20243$29m22
Q4 20243$40m21
Q1 20252$7.4m02
Q2 20255$56m40
Q3 202510$232m63
Q4 20256$275m1615
Q1 20268$257m1911
Q2 20269$969m1616

Compare with…

Holders over time, buyers and sellers, and the managers holding both, side by side for up to four stocks.

ARWR and LLY →ARWR and JNJ →ARWR and VRTX →Choose a stock to compare with ARWR →

How much of the picture this is

A 13F is a manager’s long US-listed equity book at a quarter end, filed up to 45 days later. It shows no shorts, cash, bonds or performance, and it is never today’s portfolio. Large books are listed to their largest positions, so a manager missing from this table may still hold a small position below that line. These are 95 tracked managers, not the institutional market.

Which funds own ARWR, latest filings →Back to the 13F Explorer →