WESTFIELD CAPITAL MANAGEMENT CO LP

PrivateCIK: 1177719
Location

BOSTON, MA

250
Positions
$23.83B
Total AUM (reported)
217.59M
Total Shares

Allocation by class

TOTAL AUM$23.83B250 positions
COM$15.22B63.9%
COM CL A$1.43B6.0%
CL A$1.19B5.0%
SPONSORED ADR$1.12B4.7%
SHS$946.46M4.0%
COM NEW$942.65M4.0%
CAP STK CL A$582.81M2.4%

Portfolio Concentration

Top 312.8%4–1017.5%11–2516.1%Rest53.5%TOP 1030.3%0%100%
Top 3$3.06B12.8%
4–10$4.17B17.5%
11–25$3.85B16.1%
Rest$12.76B53.5%

Top 3 weight

12.8%

Top 10 weight

30.3%

Voting Authority Distribution

Total shares with voting rights: 217.59M

Sole

Full voting authority

189.27M

shares

% of voting shares87.0%
Shared

Joint voting authority

0.00

shares

% of voting shares0.0%
None

No voting authority

28.32M

shares

% of voting shares13.0%

Investment Discretion (by position count)

Sole250
Shared0
Other0
Dominant voting typeSole · 87.0% of voting shares
Institutional Holdings250
Rows:

NVIDIA CORPORATION

SOLE
COM
Shares6.32M
TypeSH
Market value$1.10B
4.62%
Sole
4.67M
Shared
0.00
None
1.65M

ASCENDIS PHARMA A/S

SOLE
SPONSORED ADR
Shares4.81M
TypeSH
Market value$1.10B
4.62%
Sole
4.03M
Shared
0.00
None
780.71K

COMFORT SYS USA INC

SOLE
COM
Shares620.91K
TypeSH
Market value$856.24M
3.59%
Sole
518.49K
Shared
0.00
None
102.42K

APPLE INC

SOLE
COM
Shares3.13M
TypeSH
Market value$795.15M
3.34%
Sole
2.36M
Shared
0.00
None
773.18K

FTAI AVIATION LTD

SOLE
SHS
Shares2.85M
TypeSH
Market value$697.82M
2.93%
Sole
2.40M
Shared
0.00
None
444.51K

MICROSOFT CORP

SOLE
COM
Shares1.65M
TypeSH
Market value$610.60M
2.56%
Sole
1.21M
Shared
0.00
None
435.73K

ALPHABET INC

SOLE
CAP STK CL A
Shares2.03M
TypeSH
Market value$582.81M
2.45%
Sole
1.46M
Shared
0.00
None
568.05K

HOWMET AEROSPACE INC

SOLE
COM
Shares2.29M
TypeSH
Market value$527.68M
2.21%
Sole
1.66M
Shared
0.00
None
629.86K

VERTIV HOLDINGS CO

SOLE
COM CL A
Shares1.92M
TypeSH
Market value$481.54M
2.02%
Sole
1.52M
Shared
0.00
None
405.32K

AMAZON COM INC

SOLE
COM
Shares2.28M
TypeSH
Market value$474.78M
1.99%
Sole
1.69M
Shared
0.00
None
589.85K

AXON ENTERPRISE INC

SOLE
COM
Shares1.06M
TypeSH
Market value$451.93M
1.90%
Sole
814.53K
Shared
0.00
None
249.60K

BROADCOM INC

SOLE
COM
Shares1.24M
TypeSH
Market value$382.84M
1.61%
Sole
909.21K
Shared
0.00
None
327.71K

ELI LILLY & CO

SOLE
COM
Shares364.58K
TypeSH
Market value$335.33M
1.41%
Sole
272.42K
Shared
0.00
None
92.16K

TAPESTRY INC

SOLE
COM
Shares2.20M
TypeSH
Market value$310.28M
1.30%
Sole
1.88M
Shared
0.00
None
319.40K

META PLATFORMS INC

SOLE
CL A
Shares526.82K
TypeSH
Market value$301.41M
1.26%
Sole
386.66K
Shared
0.00
None
140.16K

LPL FINL HLDGS INC

SOLE
COM
Shares881.51K
TypeSH
Market value$265.18M
1.11%
Sole
699.93K
Shared
0.00
None
181.57K

MKS INC.

SOLE
COM
Shares1.05M
TypeSH
Market value$240.56M
1.01%
Sole
907.62K
Shared
0.00
None
139.14K

INSMED INC

SOLE
COM PAR $.01
Shares1.47M
TypeSH
Market value$240.12M
1.01%
Sole
1.26M
Shared
0.00
None
205.17K

VAXCYTE INC

SOLE
COM
Shares3.65M
TypeSH
Market value$211.88M
0.89%
Sole
3.36M
Shared
0.00
None
286.79K

ROCKET LAB CORP

SOLE
COM
Shares3.17M
TypeSH
Market value$203.75M
0.85%
Sole
2.56M
Shared
0.00
None
617.42K

NETFLIX INC.

SOLE
COM
Shares1.97M
TypeSH
Market value$189.41M
0.79%
Sole
1.30M
Shared
0.00
None
665.48K

API GROUP CORP

SOLE
COM STK
Shares4.63M
TypeSH
Market value$187.81M
0.79%
Sole
3.80M
Shared
0.00
None
833.89K

QUANTA SVCS INC

SOLE
COM
Shares331.82K
TypeSH
Market value$182.17M
0.76%
Sole
224.94K
Shared
0.00
None
106.87K

GE VERNOVA INC

SOLE
COM
Shares199.31K
TypeSH
Market value$173.97M
0.73%
Sole
120.33K
Shared
0.00
None
78.98K

ARES MANAGEMENT CORPORATION

SOLE
CL A COM STK
Shares1.57M
TypeSH
Market value$171.59M
0.72%
Sole
1.17M
Shared
0.00
None
404.58K
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