Security record
INSM
Insmed Incorporated · Healthcare · Biotechnology
158Tracked holders
-6Δ holders
147.56MShares held
$15.74BReported value
+6New positions
−11Exits
Momentum inputs (comparable managers):
holder breadth -3.7% ·
share flow -4.7% ·
net new positions -3.2%
— formula
Broad distribution — falling shares and fewer holders
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 | 158 | -6 | 147.56M | $15.74B | +6 | −11 |
| Q1 2026 | 166 | +6 | 152.11M | $24.63B | +9 | −4 |
| Q4 2025 | 159 | -1 | 156.45M | $27.23B | +1 | −1 |
| Q3 2025 | 21 | +1 | 121.03M | $17.43B | +1 | −1 |
| Q2 2025 | 18 | +1 | 70.35M | $7.08B | +2 | −1 |
| Q1 2025 | 14 | -1 | 33.99M | $2.59B | — | −1 |
| Q4 2024 | 15 | 0 | 31.46M | $2.17B | +1 | −1 |
| Q3 2024 | 14 | -1 | 23.46M | $1.71B | — | −1 |
| Q2 2024 | 15 | — | 25.91M | $1.74B | — | — |
Who holds it · Q2 2026
| # | Manager | Shares | Δ shares | Value | Their weight | Held | ||
|---|---|---|---|---|---|---|---|---|
| 1 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 2 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 3 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 4 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 5 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 6 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 7 | Fidelity (FMR) ✦ | 16.14M | +22.7% | $1.72B | 0.1% | ▲ Add | 5 | SEC ↗ |
| 8 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 9 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 10 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 11 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 12 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 13 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 14 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 15 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 16 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 17 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 18 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 19 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 20 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 21 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 22 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 23 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 24 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 25 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 26 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 27 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 28 | BlackRock ✦ (passive) | 15.81M | -5.2% | $1.69B | 0.0% | ▼ Trim | 5 | SEC ↗ |
| 29 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 30 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 31 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 32 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 33 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 34 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 35 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 36 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 37 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 38 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 39 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 40 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 41 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 42 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 43 | JPMorgan Chase ✦ | 10.43M | -56.8% | $1.09B | 0.1% | ▼ Trim | 4 | SEC ↗ |
| 44 | Vanguard Capital Management Llc | 9.79M | +1.5% | $1.04B | 0.0% | ▲ Add | 2 | SEC ↗ |
| 45 | Capital International Investors | 8.24M | +47.2% | $878.34M | 0.2% | ▲ Add | 3 | SEC ↗ |
| 46 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 47 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 48 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 49 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 50 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 51 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 52 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 53 | Ameriprise Financial Inc | 6.18M | +102.1% | $658.88M | 0.1% | ▲ Add | 3 | SEC ↗ |
| 54 | State Street Global Advisors ✦ (passive) | 6.05M | +9.0% | $645.28M | 0.0% | ▲ Add | 7 | SEC ↗ |
| 55 | D. E. Shaw & Co. ✦ | 5.88M | +4.5% | $626.71M | 0.4% | ▲ Add | 9 | SEC ↗ |
| 56 | D. E. Shaw & Co. ✦ | 5.88M | +4.5% | $626.71M | 0.4% | ▲ Add | 9 | SEC ↗ |
| 57 | Artisan Partners Limited Partnership | 5.44M | -16.6% | $580.20M | 0.9% | ▼ Trim | 3 | SEC ↗ |
| 58 | Geode Capital Management ✦ (passive) | 4.22M | -5.2% | $448.76M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 59 | Geode Capital Management ✦ (passive) | 4.22M | -5.2% | $448.76M | 0.0% | ▼ Trim | 9 | SEC ↗ |
| 60 | T. Rowe Price ✦ | 3.41M | +10.1% | $363.07M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 61 | T. Rowe Price ✦ | 3.41M | +10.1% | $363.07M | 0.0% | ▲ Add | 9 | SEC ↗ |
| 62 | Norges Bank ✦ (passive) | 3.38M | New | $360.12M | 0.0% | New | 1 | SEC ↗ |
| 63 | UBS Group AG | 2.58M | +48.8% | $275.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 64 | UBS Group AG | 2.58M | +48.8% | $275.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 65 | UBS Group AG | 2.58M | +48.8% | $275.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 66 | UBS Group AG | 2.58M | +48.8% | $275.55M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 67 | Citadel Advisors ✦ | 2.56M | +17.1% | $272.62M | 0.2% | ▲ Add | 9 | SEC ↗ |
| 68 | Citadel Advisors ✦ | 2.56M | +17.1% | $272.62M | 0.2% | ▲ Add | 9 | SEC ↗ |
| 69 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 70 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 71 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 72 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 73 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 74 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 75 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 76 | Franklin Resources Inc | 2.27M | -13.1% | $242.37M | 0.1% | ▼ Trim | 3 | SEC ↗ |
| 77 | Millennium Management ✦ | 2.05M | +76.9% | $218.36M | 0.2% | ▲ Add | 9 | SEC ↗ |
| 78 | Qube Research & Technologies Ltd | 1.68M | +1032.8% | $179.37M | 0.2% | ▲ Add | 2 | SEC ↗ |
| 79 | Duquesne Family Office ✦ | 1.42M | +23.4% | $151.90M | 3.5% | ▲ Add | 9 | SEC ↗ |
| 80 | Goldman Sachs Group ✦ | 1.41M | +49.6% | $150.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 81 | Goldman Sachs Group ✦ | 1.41M | +49.6% | $150.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 82 | Goldman Sachs Group ✦ | 1.41M | +49.6% | $150.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 83 | Goldman Sachs Group ✦ | 1.41M | +49.6% | $150.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 84 | Goldman Sachs Group ✦ | 1.41M | +49.6% | $150.32M | 0.0% | ▲ Add | 4 | SEC ↗ |
| 85 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 86 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 87 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 88 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 89 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 90 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 91 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 92 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 93 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 94 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 95 | UBS AM, a distinct business unit of… | 1.34M | +9.9% | $142.35M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 96 | Balyasny Asset Management L.P. | 1.33M | +498.3% | $141.42M | 0.3% | ▲ Add | 3 | SEC ↗ |
| 97 | Northern Trust Corp | 1.32M | +1.6% | $140.24M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 98 | Northern Trust Corp | 1.32M | +1.6% | $140.24M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 99 | Northern Trust Corp | 1.32M | +1.6% | $140.24M | 0.0% | ▲ Add | 3 | SEC ↗ |
| 100 | Northern Trust Corp | 1.32M | +1.6% | $140.24M | 0.0% | ▲ Add | 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 | $360.12M | 0.0% |
Exited
| Capital World Investors | $222.74M | was 0.0% |
| Loomis Sayles & Co L P | $31.88M | was 0.0% |
| Parnassus Investments, Llc | $11.37M | was 0.0% |
| Healthcare Of Ontario Pension… | $9.24M | was 0.0% |
| 1832 Asset Management L.P. | $4.73M | was 0.0% |
| Mariner, LLC | $3.61M | was 0.0% |
| Renaissance Technologies | $3.32M | was 0.0% |
| Baird Financial Group, Inc. | $2.89M | was 0.0% |
| Simplex Trading, Llc | $1.75M | was 0.1% |
| Lido Advisors, LLC | $324,025 | was 0.0% |
| Parallax Volatility Advisers… | $21,147 | was 0.0% |
Full-market context: across ALL 13F filers (SEC structured data, Q1 2026): 664 holders, 192.22M shares, $30.07B 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 17
SHAROKY MELVIN MD
Director · 5.00K sh · $637,650
Aug 10
Adsett Roger
Officer · 239.85K sh · $31.96M
Awards, exercises and tax withholding are never counted as buys or sales here. Methodology
Aug 14
SC 13G/A — Darwin Global Management, Ltd.
Aug 06
SC 13G/A — FMR LLC
Jul 22
SC 13G/A — JPMORGAN CHASE & CO
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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