$INSM is held by 17 managers from the Top-Performer cohort as of Q1 2026. Position weights range from 0.01% to 5.59%, with an average of 0.63% of portfolio. Largest holder: Duquesne Family Office LLC at 5.59%. A weekly Smart-Money commentary for this ticker has not been generated yet this batch — the table below shows the full cohort positioning.
INSMED INC
13F holders
660
Net 13F flow · Q
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Insider buys · 90d
0
Insider net · 90d
—
Congress · 90d
0
Convergence
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Institutional holders
Top 10 of 660 · Source: 13F-HR01
Safir Wealth Advisors, LLC
—
—
02
Poplar Forest Capital LLC
—
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03
Litman Gregory Wealth Management LLC
—
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04
Wynnefield Capital Inc.
—
—
05
Commerce Bank
—
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06
Axa S.a.
—
—
07
State Street
—
—
08
Cooper/Haims Advisors, LLC
—
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09
Summit Partners Public Asset Management, LLC
—
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10
ProShare Advisors LLC
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Each fund name links to that filer's expert page. Share counts and per-fund weights are pending the 13F ingest fix (portfolios_expertholding.units is currently mis-populated — see the same caveat on the fund detail page's holdings table). Quarter-over-quarter delta ships with the metrics pipeline.
Smart Money · top-200 alpha cohort
17 holders · Q1 202601
Duquesne Family Office LLC Stanley Druckenmiller
5.59% held
α +25.4pts
02
Sectoral Asset Management Inc.
2.80% NEW
α +39.3pts
03
Eventide Asset Management, LLC
1.48% NEW
α +22.5pts
04
ADAR1 Capital Management, LLC
0.34% NEW
α +74.0pts
05
Caption Management, LLC
0.14% ↓ 0.6pp
α +15.5pts
06
Soleus Capital Management, L.P.
0.07% held
α +16.0pts
07
Erste Asset Management GmbH
0.06% held
α +33.4pts
08
UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
0.04% held
α +27.5pts
09
Bellevue Group AG
0.04% held
α +12.2pts
10
Fulton Bank, N.a.
0.03% held
α +23.8pts
11
Citigroup Inc.
0.03% held
α +26.3pts
12
RiverPark Advisors, LLC
0.03% held
α +21.5pts
13
Voloridge Investment Management, LLC
0.02% held
α +15.5pts
14
Connor, Clark & Lunn Investment Management Ltd.
0.02% held
α +12.3pts
15
Principal Securities, Inc.
0.01% held
α +21.3pts
16
Wellington Management Group LLP
0.01% held
α +10.5pts
17
Nisa Investment Advisors, LLC
0.01% held
α +16.6pts
Smart Money shows holdings from our Top-Performer cohort — the 200 highest-alpha manager_13f funds in our universe. Position weight (current quarter) and QoQ delta versus prior quarter. α is the manager's annual alpha vs benchmark.
Insider activity · last 90 days
50 transactions · 5 filersTransaction codes: P open-market purchase · S sale · M option exercise · A grant · F tax-withhold sale. Insider names link to each individual's expert page.
Congress trades · last 90 days
No Congress trades
No STOCK Act filings reference $INSM in the recent window.
Convergence · Pattern Engine ships in v1.1
30-day windowIn development
Convergence detection for $INSM lands with the Pattern Engine.
Once the Pattern Engine ships, this section will surface every active convergence event involving $INSM — the institutional managers and Congress members on the same name, the 30-day window, and the combined position size.
Source data: SEC EDGAR · 13F-HR · Form 4 · CapitolTrades · Last refreshed 06:37 UTC.