WESTFIELD CAPITAL MANAGEMENT CO LP

hedge fundUpdated 29 days ago

Managed by Westfield Capital Management Co Lp • Latest filing Q2 2026

Portfolio value

$30.6B

Q2 2026

Filings

14

Quarterly 13F history

Top-10 concentration

100.0%

Weight of largest holdings

Annualized return

26.8%

Implied from 13F holdings

Portfolio value history

13F-disclosed portfolio value over 14 quarters

Show data table

Period	Portfolio value
Q1 2023	$14.2B
Q2 2023	$15.7B
Q3 2023	$14.7B
Q4 2023	$17.2B
Q1 2024	$19B
Q2 2024	$20.4B
Q3 2024	$22.1B
Q4 2024	$23B
Q1 2025	$20.5B
Q2 2025	$23.8B
Q3 2025	$23.8B
Q4 2025	$24B
Q1 2026	$23.8B
Q2 2026	$30.6B

Top holdings

278 positions as of Q2 2026

#	Stock	Value	Shares	% Portfolio	Change
1	N NVDA NVIDIA CORPORATION	$1.6B	8.08M	5.28%	Added(+27.9%)
2	G GOOGN ALPHABET INC	$1.3B	3.75M	4.38%	Added(+85.0%)
3	A ASND ASCENDIS PHARMA A/S	$1.3B	4.80M	4.18%	—
4	A AXON AXON ENTERPRISE INC	$836.1M	1.49M	2.73%	Added(+40.2%)
5	F FTAIM FTAI AVIATION LTD	$794.6M	2.94M	2.60%	Added(+3.1%)
6	A AAPL APPLE INC	$744.7M	2.57M	2.43%	Trimmed(-17.9%)
7	F FIX COMFORT SYS USA INC	$704.5M	355.4K	2.30%	Trimmed(-42.8%)
8	A AVGO BROADCOM INC	$588M	1.56M	1.92%	Added(+25.8%)
9	M MSFT MICROSOFT CORP	$527.6M	1.41M	1.72%	Trimmed(-14.3%)
10	H HWM HOWMET AEROSPACE INC	$516.6M	1.92M	1.69%	Trimmed(-16.1%)
11	L LLY ELI LILLY & CO	$499.8M	416.7K	1.63%	Added(+14.3%)
12	S SNOW SNOWFLAKE INC	$441.9M	1.74M	1.44%	Added(+141.6%)
13	M MKSI MKS INC.	$413M	928.6K	1.35%	Trimmed(-11.3%)
14	M META META PLATFORMS INC	$381.6M	677.4K	1.25%	Added(+28.6%)
15	V VRT VERTIV HOLDINGS CO	$353M	1.05M	1.15%	Trimmed(-45.1%)
16	G GEV GE VERNOVA INC	$283.5M	241.3K	0.93%	Added(+21.1%)
17	M MU MICRON TECHNOLOGY INC	$263.4M	228.2K	0.86%	Added(+127.2%)
18	V V VISA INC	$261.6M	762.4K	0.85%	Added(+67.0%)
19	A APG API GROUP CORP	$260.6M	6.15M	0.85%	Added(+32.8%)
20	T TPR TAPESTRY INC	$248.3M	1.70M	0.81%	Trimmed(-22.8%)

N

NVIDIA CORPORATION

+27.9%

Value

$1.6B

Shares

8.08M

% Port

5.28%

G

ALPHABET INC

+85.0%

Value

$1.3B

Shares

3.75M

% Port

4.38%

A

ASCENDIS PHARMA A/S

Value

$1.3B

Shares

4.80M

% Port

4.18%

A

AXON ENTERPRISE INC

+40.2%

Value

$836.1M

Shares

1.49M

% Port

2.73%

F

FTAI AVIATION LTD

+3.1%

Value

$794.6M

Shares

2.94M

% Port

2.60%

A

APPLE INC

-17.9%

Value

$744.7M

Shares

2.57M

% Port

2.43%

F

COMFORT SYS USA INC

-42.8%

Value

$704.5M

Shares

355.4K

% Port

2.30%

A

BROADCOM INC

+25.8%

Value

$588M

Shares

1.56M

% Port

1.92%

M

MICROSOFT CORP

-14.3%

Value

$527.6M

Shares

1.41M

% Port

1.72%

H

10.HWM

HOWMET AEROSPACE INC

-16.1%

Value

$516.6M

Shares

1.92M

% Port

1.69%

L

11.LLY

ELI LILLY & CO

+14.3%

Value

$499.8M

Shares

416.7K

% Port

1.63%

S

SNOWFLAKE INC

+141.6%

Value

$441.9M

Shares

1.74M

% Port

1.44%

M

MKS INC.

-11.3%

Value

$413M

Shares

928.6K

% Port

1.35%

M

META PLATFORMS INC

+28.6%

Value

$381.6M

Shares

677.4K

% Port

1.25%

V

15.VRT

VERTIV HOLDINGS CO

-45.1%

Value

$353M

Shares

1.05M

% Port

1.15%

G

16.GEV

GE VERNOVA INC

+21.1%

Value

$283.5M

Shares

241.3K

% Port

0.93%

M

17.MU

MICRON TECHNOLOGY INC

+127.2%

Value

$263.4M

Shares

228.2K

% Port

0.86%

V

18.V

VISA INC

+67.0%

Value

$261.6M

Shares

762.4K

% Port

0.85%

A

19.APG

API GROUP CORP

+32.8%

Value

$260.6M

Shares

6.15M

% Port

0.85%

T

20.TPR

TAPESTRY INC

-22.8%

Value

$248.3M

Shares

1.70M

% Port

0.81%

View full portfolio (278 holdings) →

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