InvestorLens

INSM — INSMED INC

Public company

Sign in to save6 tracked investors reported this
For educational research only.InvestorLens analyzes public regulatory filings (SEC EDGAR, STOCK Act PTRs) that may be delayed by 45 days or more. Information shown is historical and is not financial, legal, or tax advice, nor a recommendation or solicitation to buy or sell any security. Always do your own research.

InvestorLens aggregates public filing data to show which tracked investors reported holdings in this stock. Dollar values represent reported position values, not market capitalization, and may be delayed up to 45 days. Not a recommendation.

Sourced from SEC EDGAR public filings

Why are billionaires buying INSM?

Built from public SEC filings and public economic data. Not a recommendation.

Confidence
67
Institutional Conviction
Net accumulation · 2 buying vs 1 selling last quarter
55
Macro Tailwind
Macro conditions are mixed for this sector
52
Congressional Activity
0 congressional purchases, 1 sale disclosed in the last 6 months
Why? — Evidence & Confidence ▾

Of 3 tracked investors who changed their INSM position last quarter, 2 bought and 1 sold (67% buy-side). Macro conditions are mixed for this sector (Macro Tailwind 52/100 in a Squeeze regime). 0 congressional purchases, 1 sale disclosed in the last 6 months.

Supporting evidence
  • +2 tracked investors added or increased positions last quarter (Paul Tudor Jones, Ray Dalio)
  • +6 tracked investors reported holding INSM at their latest filing
Contradicting evidence — always shown
  • −1 tracked investor reduced or exited last quarter (1 reduced, 0 sold out)
  • −Congressional disclosures lean toward selling (1 sales vs 0 purchases, 6 months)
  • −13F data is disclosed up to 45 days after quarter end — positions may have changed since
Know the limits
  • · 13F disclosure lag (up to 45 days)
  • · Tracked investors are a sample, not the whole market
  • · Sector regime fit is a historical average, not a guarantee

Every InvestorLens score shows its evidence — including what argues against it. Model conviction-v1 · generated 8/4/2026.

About INSMED INC (INSM)

INSMED INC (INSM) appears in the most recent 13F filings of 6 tracked institutional investors. The largest disclosed position is held by Ken Griffin (Citadel Advisors), valued at $427M. Across recent filings, tracked investors recorded 4 new positions, 0 increased, 2 reduced, and 0 exited. All data sourced from SEC 13F filings.

Smart Money Consensus™

Based on recent institutional activity in INSM

67
/100
Institutional Accumulation
Added / Increased4
Reduced2
Exited0
BearishBullish
Crowded Trade Score™

How many top investors track INSM

40
/100
Moderate Interest
6investors

Several tracked investors have exposure.

UndiscoveredCrowded
151015+

INSM Ownership Composition

How INSMED INC is held across tracked investor types, based on reported 13F positions.

Dominant Type
Other
99% of tracked value
Institutions
6
tracked investors
Total Reported
$887.6M
combined 13F value
Sectors2
  • Other99.3%
  • Hedge Funds0.7%
Other(5)
99.3%
Hedge Funds(1)
0.7%

Tracked investors reporting INSM

  • Ken GriffinMar 31, 2026
    Citadel Advisors
    Shares
    2.6M
    Value
    $427.3M
    % Portfolio
    0.07%
  • Stanley DruckenmillerMar 31, 2026
    Duquesne Family Office
    Shares
    1.2M
    Value
    $188.7M
    % Portfolio
    5.59%
  • Izzy EnglanderMar 31, 2026
    Millennium Management
    Shares
    1.3M
    Value
    $211.8M
    % Portfolio
    0.09%
  • Ray DalioMar 31, 2026
    Bridgewater Associates
    Shares
    295.6K
    Value
    $48.3M
    % Portfolio
    0.22%
  • Paul Tudor JonesMar 31, 2026
    Tudor Investment Corp
    Shares
    31.9K
    Value
    $5.2M
    % Portfolio
    0.01%
  • Steve CohenMar 31, 2026
    Point72 Asset Management
    Shares
    38.6K
    Value
    $6.3M
    % Portfolio
    0.01%

Recent activity

Frequently asked questions

How many institutional investors hold INSM?
6 tracked institutional investors disclosed a position in INSM (INSMED INC) in their most recent 13F filing.
Who is the largest institutional holder of INSM?
Ken Griffin, Citadel Advisors, holds the largest disclosed position in INSM, valued at $427M.
Did institutional ownership of INSM increase or decrease?
Across recent 13F filings, tracked investors recorded 4 new positions, 0 increased, 2 reduced, and 0 fully exited INSM.
Where does this INSM ownership data come from?
SEC Form 13F-HR filings, accessed via EDGAR. 13F filings are disclosed quarterly with a 45-day reporting delay and cover U.S.-listed long equity positions only. This is not investment advice.