Security record · archived quarter
ARWR
Arrowhead Pharmaceuticals, Inc. · Healthcare · Biotechnology
129Tracked holders
+9Δ holders
82.68MShares held
$4.92BReported value
+14New positions
−6Exits
Momentum inputs (comparable managers):
holder breadth +7.5% ·
share flow +14.2% ·
net new positions +6.2%
— formula
Broad accumulation — rising shares across more holders
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q1 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 133 | +6 | 82.36M | $6.29B | +14 | −7 |
| Q1 2026 | 129 | +9 | 82.68M | $4.92B | +14 | −6 |
| Q4 2025 | 119 | +2 | 83.16M | $5.52B | +3 | — |
| Q3 2025 | 18 | 0 | 61.93M | $2.14B | +1 | −2 |
| Q2 2025 | 16 | +2 | 54.75M | $865.08M | +2 | — |
| Q1 2025 | 11 | +1 | 14.99M | $191.04M | +1 | — |
| Q4 2024 | 10 | -1 | 13.46M | $253.12M | +1 | −2 |
| Q3 2024 | 10 | +1 | 7.88M | $152.69M | +1 | — |
| Q2 2024 | 9 | — | 6.44M | $167.29M | — | — |
Who holds it · Q1 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 18.16M | -14.8% | $1.14B | 0.0% | ▼ Trim | 4 | SEC ↗ |
| 19 | Fidelity (FMR) ✦ | 7.27M | +11.4% | $455.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 20 | Fidelity (FMR) ✦ | 7.27M | +11.4% | $455.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 21 | Fidelity (FMR) ✦ | 7.27M | +11.4% | $455.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 22 | Fidelity (FMR) ✦ | 7.27M | +11.4% | $455.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 23 | Fidelity (FMR) ✦ | 7.27M | +11.4% | $455.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 7.27M | +11.4% | $455.62M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 25 | State Street Global Advisors ✦ (passive) | 6.50M | +1.4% | $407.31M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 26 | State Street Global Advisors ✦ (passive) | 6.50M | +1.4% | $407.31M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 27 | Vanguard Capital Management Llc | 6.03M | — | $378.23M | 0.0% | n/c | 1 | SEC ↗ |
| 28 | Geode Capital Management ✦ (passive) | 4.28M | +31.1% | $274.50M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 29 | Geode Capital Management ✦ (passive) | 4.28M | +31.1% | $274.50M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 30 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 32 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 33 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 34 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 35 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 36 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 37 | Invesco Ltd. | 3.28M | +498.9% | $205.70M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 38 | Goldman Sachs Group ✦ | 1.74M | +3.7% | $109.09M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 39 | Goldman Sachs Group ✦ | 1.74M | +3.7% | $109.09M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 40 | Goldman Sachs Group ✦ | 1.74M | +3.7% | $109.09M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | Goldman Sachs Group ✦ | 1.74M | +3.7% | $109.09M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 42 | Northern Trust Corp | 1.66M | +23.0% | $103.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 43 | Northern Trust Corp | 1.66M | +23.0% | $103.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 44 | Northern Trust Corp | 1.66M | +23.0% | $103.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 45 | Northern Trust Corp | 1.66M | +23.0% | $103.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 46 | Northern Trust Corp | 1.66M | +23.0% | $103.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 47 | Northern Trust Corp | 1.66M | +23.0% | $103.82M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 48 | Janus Henderson Group Plc | 1.44M | +12.2% | $90.12M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 49 | Janus Henderson Group Plc | 1.44M | +12.2% | $90.12M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 50 | UBS Group AG | 1.34M | +35.4% | $83.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 51 | UBS Group AG | 1.34M | +35.4% | $83.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 52 | UBS Group AG | 1.34M | +35.4% | $83.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 53 | UBS Group AG | 1.34M | +35.4% | $83.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 54 | UBS Group AG | 1.34M | +35.4% | $83.78M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 55 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 56 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 57 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 58 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 59 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 60 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 61 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 62 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 63 | UBS AM, a distinct business unit of… | 1.33M | +5.6% | $83.45M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 64 | Pictet Asset Management Holding SA | 1.27M | +23.8% | $79.61M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 65 | Charles Schwab Investment… | 1.19M | -11.9% | $74.74M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 66 | D. E. Shaw & Co. ✦ | 1.18M | +710.5% | $74.23M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 67 | D. E. Shaw & Co. ✦ | 1.18M | +710.5% | $74.23M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 68 | Fisher Asset Management ✦ | 1.11M | -15.1% | $69.82M | 0.0% | ▼ Trim | 8 | SEC ↗ |
| 69 | Bank Of America Corp /De/ | 1.06M | +71.1% | $66.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 70 | Bank Of America Corp /De/ | 1.06M | +71.1% | $66.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 71 | Bank Of America Corp /De/ | 1.06M | +71.1% | $66.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 72 | Bank Of America Corp /De/ | 1.06M | +71.1% | $66.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 73 | Bank Of America Corp /De/ | 1.06M | +71.1% | $66.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 74 | Bank Of America Corp /De/ | 1.06M | +71.1% | $66.74M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 75 | T. Rowe Price ✦ | 1.04M | +24.4% | $65.44M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 76 | T. Rowe Price ✦ | 1.04M | +24.4% | $65.44M | 0.0% | ▲ Add | 8 | SEC ↗ |
| 77 | Renaissance Technologies ✦ | 1.04M | New | $64.99M | 0.1% | New | 1 | SEC ↗ |
| 78 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 79 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 80 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 81 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 82 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 83 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 84 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 85 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 86 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 87 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 88 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 89 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 90 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 91 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 92 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 93 | Bank of New York Mellon Corp | 2.18M | +145.0% | $61.46M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 94 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 95 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 96 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 97 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 98 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 99 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 100 | Morgan Stanley ✦ | 960.51K | -34.9% | $60.22M | 0.0% | ▼ Trim | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Renaissance Technologies | $64.99M | 0.1% |
Exited
| Norges Bank | $113.16M | was 0.0% |
| Adage Capital Partners | $36.51M | was 0.1% |
| Millennium Management | $2.99M | was 0.0% |
| Man Group plc | $766,937 | was 0.0% |
| Daiwa Securities Group Inc. | $91,000 | was 0.0% |
| Kayne Anderson Rudnick… | $29,079 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 7 holders, 11.03M shares, $23.90M reported. This is a different, older period than the tracked-universe figures above and the two are never mixed.
Frequently co-owned
What else this security's tracked holders most often hold — shared-ownership counts, not fundamental relationships.
Open-market purchases (P)
No open-market insider purchases in our coverage window.
Open-market sales (S)
Aug 18
OLUKOTUN ADEOYE Y
Director · 2.00K sh · $173,920
Aug 18
PERRY MICHAEL S
Director · 11.60K sh · $1.01M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 14
SC 13G/A — Avoro Capital Advisors LLC
Jul 31
SC 13G/A — VANGUARD PORTFOLIO MANAGEMENT LLC
Jul 27
SC 13G/A — BlackRock, Inc.
Provenance: Ownership from parsed 13F common-stock positions (tracked universe, comparable sets for changes); insider rows from Forms 3/4/5; stakes from Schedules 13D/13G; every filing links to its original on SEC EDGAR.
Reporting period: Q1 2026 ·
Methodology ·
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