Security record · archived quarter
ARWR
Arrowhead Pharmaceuticals, Inc. · Healthcare · Biotechnology
131Tracked holders
+6Δ holders
82.23MShares held
$6.28BReported value
+14New positions
−9Exits
Momentum inputs (comparable managers):
holder breadth +4.8% ·
share flow -3.1% ·
net new positions +3.8%
— formula
Ownership fragmentation — more holders, smaller aggregate stake
All ownership figures: tracked 13F managers only, common-stock positions, reporting period Q2 2026
Ownership over time
| Quarter | Holders | Δ | Shares | Reported value | New | Exits |
|---|---|---|---|---|---|---|
| Q2 2026 | 131 | +6 | 82.23M | $6.28B | +14 | −9 |
| 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 · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | BlackRock ✦ (passive) | 14.83M | -18.3% | $1.21B | 0.0% | ▼ Trim | 5 | SEC ↗ ×17 |
| 2 | Fidelity (FMR) ✦ | 8.04M | +10.6% | $655.32M | 0.0% | ▲ Add | 5 | SEC ↗ ×7 |
| 3 | Vanguard Capital Management Llc | 6.11M | +1.3% | $498.10M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 4 | State Street Global Advisors ✦ (passive) | 5.69M | -12.3% | $464.17M | 0.0% | ▼ Trim | 7 | SEC ↗ ×2 |
| 5 | Norges Bank ✦ (passive) | 3.90M | New | $317.61M | 0.0% | New | 1 | SEC ↗ |
| 6 | Invesco Ltd. | 3.88M | +18.4% | $316.58M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 7 | Geode Capital Management ✦ (passive) | 3.53M | -17.5% | $298.81M | 0.0% | ▼ Trim | 9 | SEC ↗ ×2 |
| 8 | First Trust Advisors Lp | 1.35M | +807.1% | $110.28M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 9 | Northern Trust Corp | 1.19M | -28.0% | $97.23M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 10 | Dimensional Fund Advisors Lp | 1.18M | +94.2% | $96.31M | 0.0% | ▲ Add | 3 | SEC ↗ ×5 |
| 11 | Goldman Sachs Group ✦ | 1.15M | -33.9% | $93.74M | 0.0% | ▼ Trim | 4 | SEC ↗ ×3 |
| 12 | Bank Of America Corp /De/ | 1.14M | +7.1% | $92.91M | 0.0% | ▲ Add | 3 | SEC ↗ ×7 |
| 13 | Holocene Advisors, LP | 1.11M | New | $90.16M | 0.2% | New | 1 | SEC ↗ |
| 14 | Morgan Stanley ✦ | 1.08M | +12.9% | $88.43M | 0.0% | ▲ Add | 4 | SEC ↗ ×16 |
| 15 | UBS AM, a distinct business unit of… | 964.48K | -27.5% | $78.61M | 0.0% | ▼ Trim | 3 | SEC ↗ ×12 |
| 16 | Fisher Asset Management ✦ | 957.69K | -14.0% | $78.06M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 17 | Charles Schwab Investment… | 923.93K | -22.5% | $75.31M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 18 | Bank of New York Mellon Corp | 1.97M | -9.2% | $71.40M | 0.0% | ▼ Trim | 3 | SEC ↗ ×17 |
| 19 | UBS Group AG | 861.52K | -35.5% | $70.22M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 20 | T. Rowe Price ✦ | 853.36K | -18.2% | $69.56M | 0.0% | ▼ Trim | 9 | SEC ↗ ×2 |
| 21 | JPMorgan Chase ✦ | 637.40K | -6.7% | $51.77M | 0.0% | ▼ Trim | 4 | SEC ↗ ×6 |
| 22 | Connor, Clark & Lunn Investment… | 625.57K | -25.3% | $50.99M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 23 | Susquehanna International Group, Llp | 596.57K | +57.5% | $48.63M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 24 | Two Sigma Investments ✦ | 580.61K | +1521.8% | $47.33M | 0.0% | ▲ Add | 2 | SEC ↗ |
| 25 | Pictet Asset Management Holding SA | 573.42K | -55.0% | $46.71M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 26 | Bnp Paribas Financial Markets | 558.64K | -14.1% | $45.53M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 27 | 1832 Asset Management L.P. | 538.50K | New | $43.89M | 0.1% | New | 1 | SEC ↗ |
| 28 | Principal Financial Group Inc | 514.66K | +5.0% | $41.95M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 29 | Hrt Financial Lp | 498.65K | New | $40.65M | 0.1% | New | 1 | SEC ↗ |
| 30 | Voya Investment Management Llc | 483.50K | -26.3% | $39.41M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 31 | Balyasny Asset Management L.P. | 470.75K | +128.1% | $38.37M | 0.1% | ▲ Add | 3 | SEC ↗ ×3 |
| 32 | Renaissance Technologies ✦ | 468.92K | -54.8% | $38.22M | 0.1% | ▼ Trim | 2 | SEC ↗ |
| 33 | Franklin Resources Inc | 462.13K | -0.1% | $37.67M | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 34 | D. E. Shaw & Co. ✦ | 431.56K | -63.5% | $35.18M | 0.0% | ▼ Trim | 4 | SEC ↗ ×2 |
| 35 | Nuveen, LLC | 415.88K | -16.8% | $33.90M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 36 | Assenagon Asset Management S.A. | 403.85K | +587.6% | $32.92M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 37 | Rhumbline Advisers | 374.90K | -7.3% | $30.56M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 38 | American Century Companies Inc | 364.21K | -44.1% | $29.69M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 39 | Millennium Management ✦ | 329.34K | New | $26.84M | 0.0% | New | 1 | SEC ↗ ×2 |
| 40 | LPL Financial LLC | 310.76K | +140.0% | $25.33M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 41 | Artisan Partners Limited Partnership | 310.71K | New | $25.33M | 0.0% | New | 1 | SEC ↗ |
| 42 | Marshall Wace ✦ | 305.03K | +69.9% | $24.86M | 0.0% | ▲ Add | 7 | SEC ↗ ×2 |
| 43 | Sei Investments Co | 500.62K | +112.8% | $24.74M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 44 | Nordea Investment Management Ab | 284.18K | -7.3% | $23.56M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 45 | Russell Investments Group, Ltd. | 284.10K | +63.3% | $23.16M | 0.0% | ▲ Add | 3 | SEC ↗ ×8 |
| 46 | Citigroup Inc | 264.68K | +5.2% | $21.57M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 47 | California Public Employees… | 256.31K | -0.3% | $20.89M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 48 | Squarepoint Ops LLC | 255.91K | New | $20.86M | 0.0% | New | 1 | SEC ↗ |
| 49 | Envestnet Asset Management Inc | 254.23K | +280.9% | $20.72M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 50 | Aberdeen Group plc | 251.97K | -30.8% | $20.54M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 51 | Swiss National Bank | 238.90K | -1.3% | $19.47M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 52 | Legal & General Group Plc | 237.22K | +3.5% | $19.34M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 53 | Arrowstreet Capital ✦ | 218.13K | -62.9% | $17.78M | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 54 | Hsbc Holdings Plc | 203.80K | +34.9% | $16.76M | 0.0% | ▲ Add | 2 | SEC ↗ ×2 |
| 55 | Jane Street Group, Llc | 196.21K | +1143.8% | $15.99M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 56 | AQR Capital Management ✦ | 198.84K | +18.9% | $15.82M | 0.0% | ▲ Add | 6 | SEC ↗ ×4 |
| 57 | Raymond James Financial Inc | 169.91K | -6.9% | $13.85M | 0.0% | ▼ Trim | 3 | SEC ↗ ×4 |
| 58 | Wcm Investment Management, Llc | 171.23K | -0.2% | $13.78M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 59 | Clearbridge Investments, LLC | 157.11K | -22.4% | $12.81M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 60 | Ameriprise Financial Inc | 155.91K | -18.4% | $12.71M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 61 | Deutsche Bank Ag\ | 149.24K | -42.6% | $12.16M | 0.0% | ▼ Trim | 3 | SEC ↗ ×5 |
| 62 | Toronto Dominion Bank | 144.93K | -3.6% | $11.81M | 0.0% | ▼ Trim | 2 | SEC ↗ ×3 |
| 63 | Bank Of Nova Scotia | 133.81K | -1.6% | $10.91M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 64 | Alliancebernstein L.P. | 173.26K | -38.2% | $10.86M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 65 | State Of Wisconsin Investment Board | 4.07M | +32.3% | $10.58M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 66 | Wells Fargo & Company/Mn | 128.79K | -18.7% | $10.50M | 0.0% | ▼ Trim | 3 | SEC ↗ ×7 |
| 67 | Universal- Beteiligungs- und… | 116.39K | -3.2% | $9.49M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 68 | Manufacturers Life Insurance… | 111.95K | -30.2% | $9.13M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 69 | State Board Of Administration Of… | 104.32K | +251.9% | $8.50M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 70 | Victory Capital Management Inc | 100.72K | +12.8% | $8.21M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 71 | Creative Planning | 100.29K | +13.6% | $8.17M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 72 | Neuberger Berman Group LLC | 98.47K | -51.7% | $8.03M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 73 | New York State Common Retirement… | 95.52K | +128.1% | $7.79M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 74 | Federated Hermes, Inc. | 89.36K | +533.3% | $7.28M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 75 | Barclays Plc | 86.78K | -24.8% | $7.07M | 0.0% | ▼ Trim | 3 | SEC ↗ ×3 |
| 76 | Prudential Financial Inc | 85.71K | +22.2% | $6.99M | 0.0% | ▲ Add | 3 | SEC ↗ ×2 |
| 77 | Allianz Asset Management GmbH | 75.35K | +35.5% | $6.14M | 0.0% | ▲ Add | 3 | SEC ↗ ×3 |
| 78 | Stifel Financial Corp | 73.29K | +526.7% | $5.97M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 79 | Loomis Sayles & Co L P | 65.63K | -61.9% | $5.35M | 0.0% | ▼ Trim | 2 | SEC ↗ ×2 |
| 80 | Royal Bank Of Canada | 60.96K | -0.6% | $4.97M | 0.0% | ▼ Trim | 3 | SEC ↗ ×8 |
| 81 | MIRAE ASSET GLOBAL ETFS HOLDINGS… | 60.47K | -56.7% | $4.92M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 82 | Alyeska Investment Group, L.P. | 58.72K | -87.6% | $4.79M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 83 | Commonwealth Equity Services, Llc | 55.17K | +0.2% | $4.50M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 84 | Nomura Asset Management… | 52.34K | +22.4% | $4.27M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 85 | Wellington Management ✦ | 50.08K | -8.1% | $4.08M | 0.0% | ▼ Trim | 9 | SEC ↗ ×4 |
| 86 | Zurcher Kantonalbank (Zurich… | 44.36K | -8.3% | $3.62M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 87 | Allspring Global Investments… | 43.24K | -21.6% | $3.48M | 0.0% | ▼ Trim | 3 | SEC ↗ ×2 |
| 88 | Us Bancorp \De\ | 38.23K | +10.2% | $3.12M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 89 | Fifth Third Bancorp | 30.53K | -8.7% | $2.49M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 90 | Focus Partners Wealth | 30.51K | +122.8% | $2.49M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 91 | Cetera Investment Advisers | 29.24K | +210.3% | $2.38M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 92 | Simplex Trading, Llc | 29.00K | +103.1% | $2.36M | 0.1% | ▲ Add | 2 | SEC ↗ |
| 93 | Ensign Peak Advisors, Inc | 28.71K | -51.4% | $2.34M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 94 | Td Asset Management Inc | 26.92K | -39.8% | $2.19M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 95 | Pacer Advisors, Inc. | 22.96K | -4.0% | $1.87M | 0.0% | ▼ Trim | 2 | SEC ↗ |
| 96 | Bank Of Montreal /Can/ | 22.19K | +0.3% | $1.81M | 0.0% | ▲ Add | 3 | SEC ↗ ×4 |
| 97 | Wealth Enhancement Advisory… | 21.69K | +0.9% | $1.66M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 98 | LMR Partners LLP | 20.12K | New | $1.64M | 0.0% | New | 1 | SEC ↗ ×2 |
| 99 | Mackenzie Financial Corp | 18.36K | -34.0% | $1.50M | 0.0% | ▼ Trim | 3 | SEC ↗ |
| 100 | Corient Private Wealth LP | 16.11K | 0.0% | $1.31M | 0.0% | Held | 3 | SEC ↗ |
“Their weight” = the position's share of that manager's reported 13F equity value — the conviction measure. ✦ = curated manager.
New buyers
| Norges Bank | $317.61M | 0.0% |
| Holocene Advisors, LP | $90.16M | 0.2% |
| 1832 Asset Management L.P. | $43.89M | 0.1% |
| Hrt Financial Lp | $40.65M | 0.1% |
| Millennium Management | $26.84M | 0.0% |
| Artisan Partners Limited… | $25.33M | 0.0% |
| Squarepoint Ops LLC | $20.86M | 0.0% |
| LMR Partners LLP | $1.64M | 0.0% |
Exited
| Canada Pension Plan… | $20.42M | was 0.0% |
| Schroder Investment… | $9.34M | was 0.0% |
| HighTower Advisors, LLC | $9.18M | was 0.0% |
| Citadel Advisors | $6.16M | was 0.0% |
| Bridgewater Associates | $5.99M | was 0.0% |
| Amundi | $1.08M | was 0.0% |
| Nomura Holdings Inc | $874,887 | was 0.0% |
| Aviva Plc | $457,334 | was 0.0% |
| Optiver Holding B.V. | $25,582 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 430 holders, 120.06M shares, $7.40B 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: Q2 2026 ·
Methodology ·
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