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INSMED Inc

INSM
Exchange
Nasdaq
Industry
Pharmaceutical Preparations
SEC CIK
0001104506

In the last 90 days, INSMED Inc insiders filed 0 open-market purchases and 7 sales; 667 institutions reported holding it in 13F filings for Q2 2026, worth $23.8B in total; superinvestors Maverick Capital and Duquesne Family Office hold it.

Superinvestors holding INSM, Q2 2026

2 superinvestors report holding INSMED Inc on Form 13F, worth $381.2M in total. Weight is INSMED Inc's share of each 13F portfolio; actions compare shares with Q1 2026.

See all superinvestors
Superinvestors holding INSM in Q2 2026
Superinvestor% of portfolioSharesValuevs. previous quarter
Maverick CapitalLee Ainslie2.1%2,150,762$229.3MNew
Duquesne Family OfficeStanley Druckenmiller3.5%1,424,690$151.9MAdded+23.4%

Moves by quarter

Superinvestors that opened, added to, trimmed or sold out of INSM each quarter, comparing shares with the quarter before. A superinvestor that didn't file for a quarter isn't listed, and isn't counted as selling.

  1. Q2 2026

    2 superinvestors holding at quarter end

    New
    Maverick Capital
    Added
    Duquesne Family Office (+23.4%)
  2. Q1 2026

    1 superinvestor holding at quarter end

    Reduced
    Duquesne Family Office (−22.1%)
  3. Q4 2025

    1 superinvestor holding at quarter end

    Reduced
    Duquesne Family Office (−38.9%)
    Sold out
    Maverick Capital
  4. Q3 2025

    2 superinvestors holding at quarter end

    Added
    Duquesne Family Office (+7.5%)
    Reduced
    Maverick Capital (−18.4%)
  5. Q2 2025

    2 superinvestors holding at quarter end

    Added
    Duquesne Family Office (+64.6%), Maverick Capital (+89.2%)
    Sold out
    Soros Fund Management
  6. Q1 2025

    3 superinvestors holding at quarter end

    New
    Maverick Capital
    Added
    Duquesne Family Office (+130.7%)
    Reduced
    Soros Fund Management (−32.5%)
  7. Q4 2024

    2 superinvestors holding at quarter end

    Added
    Duquesne Family Office (+2,867.4%)
    Reduced
    Soros Fund Management (−4.9%)
  8. Q3 2024

    2 superinvestors holding at quarter end

    Added
    Soros Fund Management (+1.7%)
    Sold out
    Viking Global Investors
  9. Q2 2024

    3 superinvestors holding at quarter end

    New
    Viking Global Investors, Soros Fund Management, Duquesne Family Office
  10. Q1 2024

    0 superinvestors holding at quarter end

    Sold out
    Soros Fund Management
  11. Q4 2023

    1 superinvestor holding at quarter end

    New
    Soros Fund Management