3 hedge funds and family offices disclose a INSM position in their latest SEC 13F filing — combined $237.1M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Stanley Druckenmiller | Duquesne Family Office LLC | 1,154,090 | $188.7M | 6.43% | 2026-03-31 |
| 2 | Ray Dalio | Bridgewater Associates LP | 295,579 | $48.3M | 0.22% | 2026-03-31 |
| 3 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 84 | $15K | 0.00% | 2025-12-31 |
As of the latest 13F window, 3 tracked superinvestors hold INSM. The largest disclosed position is Stanley Druckenmiller at $188.7M (6.4% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying INSM, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
3 hedge funds and family offices disclose a INSM position in their latest SEC 13F filing — combined $237.1M in market value.
| # | Investor | Fund | Shares | Value | % of Portfolio | Filed |
|---|---|---|---|---|---|---|
| 1 | Stanley Druckenmiller | Duquesne Family Office LLC | 1,154,090 | $188.7M | 6.43% | 2026-03-31 |
| 2 | Ray Dalio | Bridgewater Associates LP | 295,579 | $48.3M | 0.22% | 2026-03-31 |
| 3 | Christopher Bloomstran | Semper Augustus Investments Group LLC | 84 | $15K | 0.00% | 2025-12-31 |
As of the latest 13F window, 3 tracked superinvestors hold INSM. The largest disclosed position is Stanley Druckenmiller at $188.7M (6.4% of portfolio).
13F filings are due 45 days after each quarter end and capture long-equity positions held by U.S. institutional managers with $100M+ AUM. Use this page to see exactly who is buying INSM, how concentrated each position is, and the implied conviction level relative to the rest of each investor's book.
Key takeaways
