Who owns Insmed Inc (INSM)?
330 US mutual funds and ETFs from 167 fund families reported a position in INSM for the quarter ending 2026-06-30. Against their own report a quarter earlier, 123 raised shares, 40 opened a new position, 120 cut and 88 sold out.
Largest fund families
| Fund family | Funds | Share of fund-held shares |
|---|---|---|
| Vanguard Index Funds | 8 | 36.9% |
| Ishares Trust | 7 | 10.0% |
| Jpmorgan Trust Ii | 2 | 8.5% |
| J.P. Morgan Mutual Fund Investment Trust | 1 | 2.8% |
| Spdr Series Trust | 2 | 2.2% |
| American Funds Insurance Series | 2 | 2.1% |
Tracked managers holding INSM
| Investor | Book weight |
|---|---|
| Stanley Druckenmiller · Duquesne | 5.7% |
Source: SEC Form N-PORT, which funds file about 60 days after quarter end, and the latest 13F filings. Share counts, not trades: a change can reflect fund inflows or outflows rather than a decision about INSM. A record of holdings, not a forecast and not investment advice. See all owner pages or the forecast board for the names our model ranks.
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