Institutional Fund
Westfield Capital Management Co LP
Boston, MACIK 11777195 filings on record
Portfolio Value
$23.83B
Q1 2026
Holdings
250
Reported positions
New Buys
46
Opened this quarter
QoQ Change
-0.7%
from $24.01B
Portfolio Value Trend
Reported 13F value by quarter
Portfolio value trend — upgrade to see history
UpgradeTop Allocations
Largest positions by weight
- Nvidia Corporation4.6%
- Ascendis Pharma A/S4.6%
- Comfort Sys USA Inc3.6%
- Apple Inc3.3%
- Ftai Aviation Ltd2.9%
- Microsoft Corp2.6%
- Other78.3%
Portfolio Holdings
250 positions · Q1 2026
| # | Security | Shares | Value | % Port. | Δ Shares | Activity |
|---|---|---|---|---|---|---|
| 1 | Nvidia Corporation | 6.32M | $1.10B | 4.6% | +366.0K | Added |
| 2 | Ascendis Pharma A/S | 4.81M | $1.10B | 4.6% | −372.3K | Reduced |
| 3 | Comfort Sys USA Inc | 620.9K | $856.24M | 3.6% | −47.9K | Reduced |
| 4 | Apple Inc | 3.13M | $795.15M | 3.3% | −141.2K | Reduced |
| 5 | Ftai Aviation Ltd | 2.85M | $697.82M | 2.9% | +497.6K | Added |
| 6 | Microsoft Corp | 1.65M | $610.60M | 2.6% | +28.3K | Added |
| 7 | Alphabet Inc | 2.03M | $582.81M | 2.4% | −151.7K | Reduced |
| 8 | Howmet Aerospace Inc | 2.29M | $527.68M | 2.2% | +70.6K | Added |
| 9 | Vertiv Holdings Co | 1.92M | $481.54M | 2.0% | −356.0K | Reduced |
| 10 | Amazon Com Inc | 2.28M | $474.78M | 2.0% | −51.1K | Reduced |
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