Castleark Management LLC
- SEC CIK
- 0001106832
- Latest filing
- Aug 14, 2026
INSM holding history
INSMED Inc in every 13F filed by Castleark Management LLC, including the quarters it was sold out or no filing was made. Changes compare share counts with the previous calendar quarter.
INSM overviewAll 13F holders of INSMFull Q2 2026 holdings
- Shares (Q2 2026)
- 7,790
- Value
- $830.6K
- % of portfolio
- <0.1%
- Quarters held
- 13
- Since Q1 2021
| Quarter | Shares | Value | % of portfolio | Share change | Action | All holders |
|---|---|---|---|---|---|---|
| Q2 2026 | 7,790 | $830.6K | <0.1% | 00.0% | Unchanged | Holders |
| Q1 2026 | 7,790 | $1.27M | <0.1% | 00.0% | Unchanged | Holders |
| Q4 2025 | 7,790 | $1.36M | <0.1% | +2,060+36.0% | Added | Holders |
| Q3 2025 | 5,730 | $825.2K | <0.1% | +2,590+82.5% | Added | Holders |
| Q2 2025 | 3,140 | $316.0K | <0.1% | −50,720−94.2% | Reduced | Holders |
| Q1 2025 | 53,860 | $4.11M | 0.1% | +1,080+2.0% | Added | Holders |
| Q4 2024 | 52,780 | $3.64M | 0.1% | +9,480+21.9% | Added | Holders |
| Q3 2024 | 43,300 | $3.16M | 0.1% | +26,640+159.9% | Added | Holders |
| Q2 2024 | 16,660 | $1.12M | <0.1% | +16,660 | New | Holders |
| Q4 2022 | 0 | $0 | 0.0% | −228,410−100.0% | Sold out | Holders |
| Q3 2022 | 228,410 | $4.92M | 0.3% | +64,060+39.0% | Added | Holders |
| Q2 2022 | 164,350 | $3.24M | 0.2% | −4,370−2.6% | Reduced | Holders |
| Q1 2022 | 168,720 | $3.96M | 0.2% | +168,720 | New | Holders |
| Q2 2021 | 0 | $0 | 0.0% | −209,103−100.0% | Sold out | Holders |
| Q1 2021 | 209,103 | $7.12M | 0.3% | – | – | Holders |
Livermore's 13F data starts with Q1 2021, so Q1 2021 has no change from the previous quarter.