Westfield Capital Management Co LP

Investment Portfolio & 13F Holdings Analysis

About

WESTFIELD CAPITAL MANAGEMENT CO LP is an institutional investment manager that filed its latest Form 13F for 2025Q1, reporting 244 holdings worth $20.5 billion. Form 13F filings provide transparency into the equity holdings of institutional investment managers with over $100 million in assets under management. This page displays the most recent portfolio holdings, allowing investors to track position changes, new investments, and portfolio composition.

Filing Details

13F-HR • 2025-03-31

SEC FilingSEC DataHachi Filing

Report Date: 2025-03-31
Filing Date: 2025-05-09
Total Holdings: 244
Total Value: 20549795430
Accession Number: 0001085146-25-002864
Form Type: 13F-HR
CIK: 0001177719
Manager Name: Westfield Capital Management Co LP

Data Enrichment

99% identified

241 identified3 unidentified

Holdings

SEC FilingSEC DataHachi Filing

Manager:

244 positions • $20,549,795.43K total value

244 positions

Manager:

SEC FilingSEC DataHachi Filing

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Ascendis Pharma A/S

ASND|04351P101

5479259(-0.9%)

Value:

$854.0B(+12.2%)

NVIDIA CORP

NVDA|67066G104

7336654(-0.8%)

Value:

$795.1B(-20.0%)

Apple Inc.

AAPL|037833100

3401183(-6.9%)

Value:

$755.5B(-17.4%)

MICROSOFT CORP

MSFT|594918104

1832611(-2.1%)

Value:

$687.9B(-12.8%)

AMAZON COM INC

AMZN|023135106

3462676(+0.6%)

Value:

$658.8B(-12.8%)

Alphabet Inc.

GOOGL|02079K305

3459916(-0.4%)

Value:

$535.0B(-18.7%)

Meta Platforms, Inc.

META|30303M102

898538(-0.3%)

Value:

$517.9B(-1.8%)

AXON ENTERPRISE, INC.

AXON|05464C101

927801(+29.8%)

Value:

$488.0B(+14.8%)

TransDigm Group INC

TDG|893641100

316162(-12.7%)

Value:

$437.3B(-4.7%)

VISA INC.

V|92826C839

904397(+0.5%)

Value:

$317.0B(+11.5%)

COMFORT SYSTEMS USA INC

FIX|199908104

889639(+0.5%)

Value:

$286.8B(-23.6%)

LPL Financial Holdings Inc.

LPLA|50212V100

830099(+17.6%)

Value:

$271.6B(+17.8%)

ServiceNow, Inc.

NOW|81762P102

320284(+1.7%)

Value:

$255.0B(-23.6%)

TAPESTRY, INC.

TPR|876030107

3601314(-0.1%)

Value:

$253.6B(+7.7%)

Legend Biotech Corp

LEGN|52490G102

6917567(+21.1%)

Value:

$234.7B(+26.2%)

Broadcom Inc.

AVGO|11135F101

1398303(+3.2%)

Value:

$234.1B(-25.5%)

ELI LILLY & Co

LLY|532457108

258952(+17.7%)

Value:

$213.9B(+25.9%)

FTAI Aviation Ltd.

FTAI|G3730V105

1892451(-23.9%)

Value:

$210.1B(-41.4%)

Salesforce, Inc.

CRM|79466L302

782929(+31.1%)

Value:

$210.1B(+5.2%)

PROGRESSIVE CORP/OH/

PGR|743315103

712249(-4.8%)

Value:

$201.6B(+12.4%)

Instrument	Shares		Other Manager	Value
Ascendis Pharma A/S(ASNDcusip04351P101)	5.5M	QoQ -0.88% (-49.0K) YoY +34.45% (+1.4M)	All Managers (Combined)	$854.0M	QoQ +12.20% (-$92.9M) YoY +38.62% (+$237.9M)
Nvidia Corp(NVDAcusip67066G104)	7.3M	QoQ -0.85% (-63.2K) YoY +1122.84% (+6.7M)	All Managers (Combined)	$795.1M	QoQ -19.98% (-$198.6M) YoY +46.67% (+$253.0M)
Apple Inc.(AAPLcusip037833100)	3.4M	QoQ -6.94% (-253.8K) YoY +5.06% (+163.9K)	All Managers (Combined)	$755.5M	QoQ -17.45% (-$159.8M) YoY +36.09% (+$200.4M)
Microsoft Corp(MSFTcusip594918104)	1.8M	QoQ -2.14% (-40.2K) YoY +20.33% (+309.7K)	All Managers (Combined)	$687.9M	QoQ -12.85% (-$101.4M) YoY +7.36% (+$47.2M)
Amazon Com Inc(AMZNcusip023135106)	3.5M	QoQ +0.59% (-20.4K) YoY +31.48% (+829.2K)	All Managers (Combined)	$658.8M	QoQ -12.76% (-$96.4M) YoY +38.69% (+$183.8M)
Alphabet Inc.(GOOGLcusip02079K305)	3.5M	QoQ -0.44% (-15.5K) YoY +17.02% (+503.3K)	All Managers (Combined)	$535.0M	QoQ -18.67% (-$122.9M) YoY +19.89% (+$88.8M)
Meta Platforms, Inc.(METAcusip30303M102)	898.5K	QoQ -0.26% (-2.4K) YoY +27.89% (+196.0K)	All Managers (Combined)	$517.9M	QoQ -1.82% (-$9.6M) YoY +51.79% (+$176.7M)
Axon Enterprise, Inc.(AXONcusip05464C101)	927.8K	QoQ +29.78% (+212.9K) YoY +30.80% (+218.5K)	All Managers (Combined)	$488.0M	QoQ +14.85% (+$63.1M) YoY +119.88% (+$266.0M)
Transdigm Group Inc(TDGcusip893641100)	316.2K	QoQ -12.71% (-46.1K) YoY +0.24% (+788)	All Managers (Combined)	$437.3M	QoQ -4.72% (-$21.7M) YoY +12.59% (+$48.9M)
Visa Inc.(Vcusip92826C839)	904.4K	QoQ +0.52% (+4.7K) YoY -11.33% (-115.6K)	All Managers (Combined)	$317.0M	QoQ +11.47% (+$32.6M) YoY +11.34% (-$32.3M)
Comfort Systems Usa Inc(FIXcusip199908104)	889.6K	QoQ +0.50% (-4.5K) YoY +33.37% (+222.6K)	All Managers (Combined)	$286.8M	QoQ -23.60% (-$88.6M) YoY +35.31% (+$74.8M)
Lpl Financial Holdings Inc.(LPLAcusip50212V100)	830.1K	QoQ +17.59% (+124.2K) YoY +115.48% (+444.9K)	All Managers (Combined)	$271.6M	QoQ +17.81% (+$41.1M) YoY +166.81% (+$169.8M)
Servicenow, Inc.(NOWcusip81762P102)	320.3K	QoQ +1.66% (-5.2K) YoY +13.82% (+38.9K)	All Managers (Combined)	$255.0M	QoQ -23.65% (-$79.0M) YoY +18.86% (+$40.5M)
Tapestry, Inc.(TPRcusip876030107)	3.6M	QoQ -0.09% (-3.6K) YoY +245.62% (+2.6M)	All Managers (Combined)	$253.6M	QoQ +7.66% (-$18.1M) YoY +412.53% (+$204.1M)
Legend Biotech Corp(LEGNcusip52490G102)	6.9M	QoQ +21.06% (+1.2M) YoY +208.85% (+4.7M)	All Managers (Combined)	$234.7M	QoQ +26.24% (+$48.8M) YoY +86.83% (+$109.1M)
Broadcom Inc.(AVGOcusip11135F101)	1.4M	QoQ +3.19% (-43.3K) YoY +5693.19% (+1.4M)	All Managers (Combined)	$234.1M	QoQ -25.47% (-$80.0M) YoY +631.81% (+$202.1M)
Eli Lilly & Co(LLYcusip532457108)	259.0K	QoQ +17.70% (+39.0K) YoY +814.21% (+230.6K)	All Managers (Combined)	$213.9M	QoQ +25.92% (+$44.0M) YoY +870.56% (+$191.8M)
Ftai Aviation Ltd.(FTAIcusipG3730V105)	1.9M	QoQ -23.95% (-596.3K) YoY NEW(+1.9M)	All Managers (Combined)	$210.1M	QoQ -41.38% (-$148.4M) YoY NEW(+$210.1M)
Salesforce, Inc.(CRMcusip79466L302)	782.9K	QoQ +31.12% (+185.8K) YoY +32.57% (+192.4K)	All Managers (Combined)	$210.1M	QoQ +5.24% (+$10.5M) YoY +18.12% (+$32.2M)
Progressive Corp/Oh/(PGRcusip743315103)	712.2K	QoQ -4.80% (-35.9K) YoY +15.36% (+94.8K)	All Managers (Combined)	$201.6M	QoQ +12.44% (-$22.3M) YoY +57.85% (+$73.9M)