INSMED INC (INSM) Institutional Ownership Changes & 13F Activity

INSMED INC (INSM). Institutional ownership data tracks hedge funds, asset managers, and other institutional investors based on recent SEC Form 13F filings. This page analyzes institutional buying and selling activity, new holdings, and sold-out positions among tracked filers. Notable filers include Parnassus Endeavor Fund, Renaissance Technologies LLC, Sequoia Financial Advisors, and Viking Global Investors.

Portfolio quarterNameTypeQuantityRemainingReported stock balance
Q1 2026Parnassus Endeavor FundBuy17,87269,515$11,367,093
Q1 2026Renaissance Technologies LLCSell-5,60020,300$3,319,456
Q1 2026Sequoia Financial AdvisorsSell-1,5554,385$717,036
Q4 2025Renaissance Technologies LLCSell-326,98725,900$4,507,636
Q4 2025Parnassus Endeavor FundBuy42,91651,643$8,987,948
Q4 2025Sequoia Financial AdvisorsBuy3,6335,940$1,033,798
Q3 2025Renaissance Technologies LLCBuy44,200352,887$50,819,257
Q3 2025Sequoia Financial AdvisorsBuy2,3072,307$332,232
Q3 2025Parnassus Endeavor FundBuy7978,727$1,256,775
Q2 2025Renaissance Technologies LLCBuy283,400308,687$31,066,260
Q2 2025Parnassus Endeavor FundBuy7,9307,930$798,075
Q4 2024Renaissance Technologies LLCSell-108,70025,287$1,745,814
Q2 2024Viking Global InvestorsBuy1,035,9701,035,970$69,409,990
Q1 2024Renaissance Technologies LLCBuy106,687133,987$3,635
Q4 2022Renaissance Technologies LLCSell-9,18727,300$545
Q4 2017Renaissance Technologies LLCSell-19,40036,487$1,138
Q3 2017Renaissance Technologies LLCSell-64,61355,887$1,744
Q4 2016Renaissance Technologies LLCSell-77,200120,500$1,594
Q3 2016Renaissance Technologies LLCBuy48,400197,700$2,871
Q2 2016Renaissance Technologies LLCSell-34,487149,300$1,472
Q1 2016Renaissance Technologies LLCBuy135,200183,787$2,329
Q2 2014Renaissance Technologies LLCBuy48,58748,587$971

Frequently asked questions about INSM activity

  • Which institutional owners are buying INSM?

    Institutional owners buying INSM include investors who have either initiated new positions or increased their existing holdings based on recent SEC 13F filings. The activity table above highlights which funds added shares in the latest reporting periods and how their positions changed over time.

  • What does "buy" mean in INSM activity?

    "Buy" means an investor increased their reported position in INSM compared to the prior reporting period. This reflects growing exposure to INSMED INC (INSM) rather than necessarily a brand-new position (though new positions also appear as buys when prior quantity was zero).

  • Is institutional interest in INSM increasing?

    Institutional interest in INSM can be assessed by comparing the number of tracked funds adding or increasing positions versus those trimming or exiting across the periods shown. A higher number of additions typically signals increasing participation among large filers, but it should be read alongside position sizes and the full table.

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