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ARWR · Arrowhead Pharmaceuticals, Inc. · Holdings

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$61.48 -0.06 (-0.10%) At close · Oct 7
Market Cap
$9.36B
Shares
141.25M
Volume · Oct 7 1.82M Avg daily vol (3M) 1.9M

Institutional ownership from SEC Form 13F filings. Investment managers with more than $100 million in U.S. equities must disclose their positions every quarter, within 45 days of quarter-end, so the holdings shown can lag the market by up to a quarter.

Some SEC filings for this period have not finished importing. Holder totals and changes may be incomplete; these filings remain queued for recovery.
The Sep 30, 2026 filing window is still open — showing the latest known positions. Funds that have not filed yet carry their prior-quarter positions; a fund that filed without this stock counts as sold out. Each fund's Change is measured against its own previous reported quarter, shown in the Reported column. Pick a completed quarter in the Quarter selector below to put every fund on one quarter and see the stock-wide activity breakdown.
Holders: 509
Total Value: $9,929,228,351
Total Shares: 121,854,036
Showing 1–100 of 524 holdings by value · page 1 of 6

Institutional Ownership Trend

27 quarters

Holder Concentration

Across 509 13F filers
Top Holder
12.2%
Sep 2023 → Jun 2026 · range 12.2% – 18.8%
of institutional value
Top 5
38.3%
Sep 2023 → Jun 2026 · range 38.3% – 53.5%
of institutional value
Top 10
55.0%
Sep 2023 → Jun 2026 · range 55.0% – 68.6%
of institutional value
HHI
418
Sep 2023 → Jun 2026 · range 418 – 772
Broadly held
Showing 100 of 524
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Holder Value (USD) % of 13F Shares Open
Key facts CIK 879407 CUSIP 04280A100 13F (30d) 11 filings 11 filers Visit website Investor relations