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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 Sep 2025
the date the book describes
Filed
17 Feb 2026
latest of these filings; the earliest 13 Nov 2025
Managers listing it
10
at least, of 95 tracked, among listed positions
Comparable managers
95
filed both Q2 2025 and Q3 2025; 5 listed it in both
Shares listed
6,726,720
combined, among listed positions
Reported value
$232m
combined, at the quarter end

Among the 95 comparable managers: 6 buyers (opened or added shares) and 3 sellers (trimmed or exited), at least, among listed positions. Their net change in shares is not known from listed positions, because at least one of them lists it in only one of the two quarters.

Managers listing ARWR in Q3 2025

Share of 13F value is the position’s reported value over everything the manager reported that quarter. The share change is against Q2 2025, and only where both filings list the position. A rise in value with no rise in shares is the price, not buying.

10 of 10 holders

ActionFiling
Arrowstreet Capital LP2,081,689$72munder 0.1%Addedn.a.13 Nov 2025 (the filing on sec.gov)
Marshall Wace LLP1,436,840$50m0.05%Trimmed-719,15813 Nov 2025 (the filing on sec.gov)
Woodline Partners LP1,000,158$34m0.16%Added+254,00214 Nov 2025 (the filing on sec.gov)
Janus Henderson Group Ltd973,567$34munder 0.1%Addedn.a.14 Nov 2025 (the filing on sec.gov)
Schonfeld Strategic Advisors LLC543,916$19m0.11%Added+61,86114 Nov 2025 (the filing on sec.gov)
Voloridge Investment Management LLC402,659$14munder 0.1%Newnew14 Nov 2025 (the filing on sec.gov)
ExodusPoint Capital Management LP152,327$5.3m0.05%Newnew14 Nov 2025 (the filing on sec.gov)
PDT Partners LLC90,819$3.1m0.20%Trimmed-62,16917 Nov 2025 (the filing on sec.gov)
Winton Group Ltd28,945$998kunder 0.1%Trimmedn.a.13 Nov 2025 (the filing on sec.gov)
Farallon Capital Management LLC15,800$545kunder 0.1%Held017 Feb 2026 (the filing on sec.gov)

Largest increases and reductions, by shares

Q2 2025 to Q3 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 (2)

Exited (0)

No exit shown by a manager’s own filing.

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 →