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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
31 Dec 2025
the date the book describes
Filed
27 Oct 2026
latest of these filings; the earliest 10 Feb 2026
Managers listing it
30
at least, of 95 tracked, among listed positions
Comparable managers
92
filed both Q3 2025 and Q4 2025; 10 listed it in both
Shares listed
13,891,754
combined, among listed positions
Reported value
$922m
combined, at the quarter end

Among the 92 comparable managers: 16 buyers (opened or added shares) and 15 sellers (trimmed or exited), at least, among listed positions. Their net change in shares was -986,919.

Managers listing ARWR in Q4 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q3 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

30 of 30 holders

ActionFiling
Fidelity (FMR LLC)6,520,408$433munder 0.1%Added+760,57817 Feb 2026 (the filing on sec.gov)
Arrowstreet Capital LP2,087,953$139m0.08%Added+6,26413 Feb 2026 (the filing on sec.gov)
Janus Henderson Group Ltd1,280,446$85munder 0.1%Added+306,87917 Feb 2026 (the filing on sec.gov)
T. Rowe Price Associates Inc838,818$56munder 0.1%Added+728,57317 Feb 2026 (the filing on sec.gov)
Invesco Ltd547,758$36munder 0.1%Added+44,86619 Feb 2026 (the filing on sec.gov)
Citadel Advisors LLC474,259$31munder 0.1%Added+156,64517 Feb 2026 (the filing on sec.gov)
Woodline Partners LP400,184$27m0.10%Trimmed-599,97417 Feb 2026 (the filing on sec.gov)
Balyasny Asset Management LLC376,216$25munder 0.1%Trimmed-416,75017 Feb 2026 (the filing on sec.gov)
Voloridge Investment Management LLC288,511$19m0.07%Trimmed-114,14817 Feb 2026 (the filing on sec.gov)
AllianceBernstein LP172,666$11munder 0.1%Added+16,77217 Feb 2026 (the filing on sec.gov)
AQR Capital Management LLC147,353$9.8munder 0.1%Added+4,52817 Feb 2026 (the filing on sec.gov)
D. E. Shaw & Co.146,064$9.7munder 0.1%Added+125,76317 Feb 2026 (the filing on sec.gov)
Marshall Wace LLP123,855$8.2munder 0.1%Trimmed-1,312,98513 Feb 2026 (the filing on sec.gov)
Neuberger Berman Group LLC100,385$6.7munder 0.1%Added+87,00027 Oct 2026 (the filing on sec.gov)
PDT Partners LLC70,048$4.7m0.30%Trimmed-20,77117 Feb 2026 (the filing on sec.gov)
Bridgewater Associates LP59,966$4.0munder 0.1%Newnew13 Feb 2026 (the filing on sec.gov)
Wellington Management Group LLP47,473$3.2munder 0.1%Trimmed-1,96917 Feb 2026 (the filing on sec.gov)
Millennium Management LLC45,018$3.0munder 0.1%Trimmed-64,78917 Feb 2026 (the filing on sec.gov)
ExodusPoint Capital Management LP42,011$2.8munder 0.1%Trimmed-110,31617 Feb 2026 (the filing on sec.gov)
Susquehanna International Group LLP28,911$1.9munder 0.1%Added+21,78317 Feb 2026 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC20,105$1.3munder 0.1%Trimmed-523,81117 Feb 2026 (the filing on sec.gov)
Farallon Capital Management LLC15,800$1.0munder 0.1%Held017 Feb 2026 (the filing on sec.gov)
Acadian Asset Management LLC15,306$1.0munder 0.1%Newnew10 Feb 2026 (the filing on sec.gov)
Man Group PLC11,552$767kunder 0.1%Newnew17 Feb 2026 (the filing on sec.gov)
Winton Group Ltd7,891$524kunder 0.1%Trimmed-21,05411 Feb 2026 (the filing on sec.gov)
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Largest increases and reductions, by shares

Q3 2025 to Q4 2025, 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 (5)

Exited (2)

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 →