WESTFIELD CAPITAL MANAGEMENT CO LP
Top Portfolio Positions
243 positions ·
$23,810,970,015 total
· as of Mar 31, 2026
| Ticker | Company | Shares | Value (USD) | % of Portfolio | Open |
|---|---|---|---|---|---|
| NVDA |
Nvidia Corp
Technology
|
6,317,039 | $1,101,691,601 | 4.63% | |
| ASND |
Ascendis Pharma A/S
Healthcare
|
4,813,440 | $1,100,978,131 | 4.62% | |
| FIX |
Comfort Systems USA Inc
Industrials
|
620,915 | $856,235,575 | 3.60% | |
| AAPL |
Apple Inc.
Technology
|
3,133,113 | $795,152,748 | 3.34% | |
| FTAI |
FTAI Aviation Ltd.
Industrials
|
2,848,227 | $697,815,615 | 2.93% | |
| MSFT |
Microsoft Corp
Technology
|
1,649,513 | $610,600,227 | 2.56% | |
| GOOGL |
Alphabet Inc.
Communication Services
|
2,026,744 | $582,810,504 | 2.45% | |
| HWM |
Howmet Aerospace Inc.
Industrials
|
2,289,697 | $527,683,570 | 2.22% | |
| VRT |
Vertiv Holdings Co
Industrials
|
1,921,696 | $481,538,583 | 2.02% | |
| AMZN |
Amazon Com Inc
Consumer Cyclical
|
2,279,654 | $474,783,538 | 1.99% |
Portfolio Trend
25 quarters · across all stocks
Holdings in FFIV
Shares Held
Position Value (USD)
23 quarters on record
| Report Date | Value (USD) | Shares | Type | Discretion | Filed | |
|---|---|---|---|---|---|---|
| 2026-03-31 | $86,377,156 | 298,542 | Shares | Sole | 2026-05-11 | |
| 2025-12-31 | $71,804,382 | 281,299 | Shares | Sole | 2026-02-11 | |
| 2025-09-30 | $5,242,141 | 16,220 | Shares | Sole | 2025-11-12 | |
| 2025-06-30 | $4,347,106 | 14,770 | Shares | Sole | 2025-08-12 | |
| 2025-03-31 | $3,932,807 | 14,770 | Shares | Sole | 2025-05-09 | |
| 2024-12-31 | $71,961,912 | 286,165 | Shares | Sole | 2025-02-11 | |
| 2024-09-30 | $99,447,384 | 451,623 | Shares | Sole | 2024-11-12 | |
| 2024-06-30 | $104,993,991 | 609,615 | Shares | Sole | 2024-08-14 | |
| 2024-03-31 | $97,734,972 | 515,507 | Shares | Sole | 2024-05-10 | |
| 2023-12-31 | $100,939,529 | 563,971 | Shares | Sole | 2024-02-09 | |
| 2023-09-30 | $120,551,734 | 748,118 | Shares | Sole | 2023-11-13 | |
| 2023-06-30 | $102,873,433 | 703,360 | Shares | Sole | 2023-08-11 | |
| 2023-03-31 | $62,775,489 | 430,884 | Shares | Sole | 2023-05-12 | |
| 2022-12-31 | $61,681,889 | 429,809 | Shares | Sole | 2023-02-13 | |
| 2022-09-30 | $39,570,195 | 273,407 | Shares | Sole | 2022-11-14 | |
| 2022-06-30 | $41,253,309 | 269,559 | Shares | Sole | 2022-08-12 | |
| 2022-03-31 | $52,027,296 | 248,994 | Shares | Sole | 2022-05-16 | |
| 2021-12-31 | $64,231,970 | 262,482 | Shares | Sole | 2022-02-10 | |
| 2021-09-30 | $66,127,943 | 332,669 | Shares | Sole | 2021-11-12 | |
| 2021-06-30 | $60,596,182 | 324,634 | Shares | Sole | 2021-08-10 | |
| 2021-03-31 | $56,099,586 | 268,908 | Shares | Sole | 2021-05-14 | |
| 2020-12-31 | $80,564,157 | 457,907 | Shares | Sole | 2021-02-12 | |
| 2020-09-30 | $25,768,318 | 209,891 | Shares | Sole | 2020-11-13 | |
| No 13F history on record for this holder in this stock. | ||||||