Position history for WESTFIELD CAPITAL MANAGEMENT CO LP's holdings in MASIMO CORP
WESTFIELD CAPITAL MANAGEMENT CO LP holds 1.5M shares of MASI (MASIMO CORP), worth $198M as of 2025-Q4. The position was increased (++7.2% shares). MASI represents 0.8% of WESTFIELD CAPITAL MANAGEMENT CO LP's portfolio.
Current Value
$198M
Current Shares
1.5M
Total Value Change
+$55.4M
Total Shares Change
+390,363
Other major holders of MASI: UBS AM, a distinct business unit of UBS ASSET MANAGEMENT AMERICAS LLC
Increased |
| 1.5M |
+7.2% |
| $198M |
| 0.8% |
| $131.07 |
46 |
| 2025-Q3 | Increased | 1.4M | +20.1% | $209.4M | 0.9% | $142.94 | 51 |
| 2025-Q2 | Increased | 1.2M | +75.9% | $198.7M | 0.8% | $168.21 | 65 |
| 2025-Q1 | Decreased | 671,479 | -12.7% | $111.9M | 0.5% | $163.55 | 0 |
| 2024-Q4 | Decreased | 768,858 | -44.9% | $127.1M | 0.6% | $168.59 | 0 |
| 2024-Q3 | Increased | 1.4M | +23.2% | $185.9M | 0.8% | $133.20 | 52 |
| 2024-Q2 | Increased | 1.1M | +64.9% | $142.5M | 0.7% | $125.94 | 62 |