Position history for WESTFIELD CAPITAL MANAGEMENT CO LP's holdings in INSMED INC
WESTFIELD CAPITAL MANAGEMENT CO LP holds 1.5M shares of INSM (INSMED INC), worth $240.1M as of 2026-Q1. The position was increased (+239.5% shares). INSM represents 1.0% of WESTFIELD CAPITAL MANAGEMENT CO LP's portfolio.
Current Value
$240.1M
Current Shares
1.5M
Total Value Change
+$221.7M
Total Shares Change
+1.2M
Other major holders of INSM: UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC, JPMORGAN CHASE & CO
Increased |
| 1.5M |
+239.5% |
| $240.1M |
| 1.0% |
| $147.00 |
78 |
| 2025-Q4 | Decreased | 432,521 | -11.4% | $75.3M | 0.3% | $174.09 | 0 |
| 2025-Q3 | Decreased | 487,927 | -63.6% | $70.3M | 0.3% | $141.65 | 0 |
| 2025-Q2 | Decreased | 1.3M | -4.8% | $134.8M | 0.6% | $99.49 | 0 |
| 2025-Q1 | Increased | 1.4M | +49.9% | $107.3M | 0.5% | $77.99 | 58 |
| 2024-Q4 | Increased | 938,551 | +272.8% | $64.8M | 0.3% | $68.87 | 57 |
| 2024-Q3 | New | 251,739 | - | $18.4M | 0.1% | $72.48 | 39 |