Security record · archived quarter
ARWR
Arrowhead Pharmaceuticals, Inc. · Healthcare · Biotechnology
18Tracked holders
0Δ holders
61.93MShares held
$2.14BReported value
+1New positions
−2Exits
Momentum inputs (comparable managers): holder breadth 0.0% · share flow +7.0% · net new positions -5.6% — formula
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q3 2025
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 · Q3 2025
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 2 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 3 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 5 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 6 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 7 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 20.22M | +4.1% | $697.55M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 18 | The Vanguard Group ✦ (passive) | 16.04M | +3.3% | $553.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 19 | The Vanguard Group ✦ (passive) | 16.04M | +3.3% | $553.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 20 | The Vanguard Group ✦ (passive) | 16.04M | +3.3% | $553.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 21 | The Vanguard Group ✦ (passive) | 16.04M | +3.3% | $553.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 22 | The Vanguard Group ✦ (passive) | 16.04M | +3.3% | $553.08M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 23 | State Street Global Advisors ✦ (passive) | 6.40M | +0.4% | $220.65M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 24 | Fidelity (FMR) ✦ | 5.76M | +11.4% | $198.66M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Fidelity (FMR) ✦ | 5.76M | +11.4% | $198.66M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 26 | Fidelity (FMR) ✦ | 5.76M | +11.4% | $198.66M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 27 | Fidelity (FMR) ✦ | 5.76M | +11.4% | $198.66M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 28 | Geode Capital Management ✦ (passive) | 3.13M | +5.1% | $108.01M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 29 | Geode Capital Management ✦ (passive) | 3.13M | +5.1% | $108.01M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 30 | Arrowstreet Capital ✦ | 2.08M | +3142.5% | $71.80M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 31 | Goldman Sachs Group ✦ | 1.77M | — | $61.18M | 0.0% | n/c | 1 | SEC ↗ |
| 32 | Goldman Sachs Group ✦ | 1.77M | — | $61.18M | 0.0% | n/c | 1 | SEC ↗ |
| 33 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 34 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 35 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 36 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 37 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 38 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 39 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 40 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 41 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 42 | Morgan Stanley ✦ | 1.70M | — | $58.73M | 0.0% | n/c | 1 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 44 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 45 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 46 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 47 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 48 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 49 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 50 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 51 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 52 | JPMorgan Chase ✦ | 1.55M | — | $53.51M | 0.0% | n/c | 1 | SEC ↗ |
| 53 | Marshall Wace ✦ | 1.44M | -33.4% | $49.56M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 54 | Marshall Wace ✦ | 1.44M | -33.4% | $49.56M | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 55 | Fisher Asset Management ✦ | 1.05M | +133.3% | $36.35M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 56 | Citadel Advisors ✦ | 317.61K | +410.3% | $10.95M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 57 | AQR Capital Management ✦ | 142.82K | -6.2% | $4.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 58 | AQR Capital Management ✦ | 142.82K | -6.2% | $4.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | AQR Capital Management ✦ | 142.82K | -6.2% | $4.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 60 | AQR Capital Management ✦ | 142.82K | -6.2% | $4.93M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 61 | T. Rowe Price ✦ | 110.25K | +9.6% | $3.80M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 62 | Millennium Management ✦ | 109.81K | -35.0% | $3.79M | 0.0% | ▼ Trim | 6 | SEC ↗ |
| 63 | Wellington Management ✦ | 49.44K | +2.4% | $1.71M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 64 | Wellington Management ✦ | 49.44K | +2.4% | $1.71M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 65 | Wellington Management ✦ | 49.44K | +2.4% | $1.71M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 66 | Wellington Management ✦ | 49.44K | +2.4% | $1.71M | 0.0% | ▲ Add | 6 | SEC ↗ |
| 67 | Gotham Asset Management ✦ | 31.86K | +68.9% | $1.10M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 68 | D. E. Shaw & Co. ✦ | 20.30K | New | $700,181 | 0.0% | New | 1 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| D. E. Shaw & Co. | $700,181 | 0.0% |
Exited
| Norges Bank | $30.41M | was 0.0% |
| Two Sigma Investments | $2.11M | 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: Q3 2025 ·
Methodology ·
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