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.
| Superinvestor | % of portfolio | Shares | Value | vs. previous quarter |
|---|---|---|---|---|
| Maverick CapitalLee Ainslie | 2.1% | 2,150,762 | $229.3M | New |
| Duquesne Family OfficeStanley Druckenmiller | 3.5% | 1,424,690 | $151.9M | Added+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.
Q2 2026
2 superinvestors holding at quarter end
- New
- Maverick Capital
- Added
- Duquesne Family Office (+23.4%)
Q1 2026
1 superinvestor holding at quarter end
- Reduced
- Duquesne Family Office (−22.1%)
Q4 2025
1 superinvestor holding at quarter end
- Reduced
- Duquesne Family Office (−38.9%)
- Sold out
- Maverick Capital
Q3 2025
2 superinvestors holding at quarter end
- Added
- Duquesne Family Office (+7.5%)
- Reduced
- Maverick Capital (−18.4%)
Q2 2025
2 superinvestors holding at quarter end
- Added
- Duquesne Family Office (+64.6%), Maverick Capital (+89.2%)
- Sold out
- Soros Fund Management
Q1 2025
3 superinvestors holding at quarter end
- New
- Maverick Capital
- Added
- Duquesne Family Office (+130.7%)
- Reduced
- Soros Fund Management (−32.5%)
Q4 2024
2 superinvestors holding at quarter end
- Added
- Duquesne Family Office (+2,867.4%)
- Reduced
- Soros Fund Management (−4.9%)
Q3 2024
2 superinvestors holding at quarter end
- Added
- Soros Fund Management (+1.7%)
- Sold out
- Viking Global Investors
Q2 2024
3 superinvestors holding at quarter end
Q1 2024
0 superinvestors holding at quarter end
- Sold out
- Soros Fund Management
Q4 2023
1 superinvestor holding at quarter end