Westfield Capital Management Co LP

Investment Portfolio & 13F Holdings Analysis

About

Type: FundHoldings: 244Value: $20.5BLatest: 2025Q1

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.

AI_NATIVE detailed information: This accession holds the following tickers:[
  "MRUS",
  "ASND",
  "ALAB",
  "INSM",
  "ARES",
  "HOOD",
  "RVMD",
  "FLEX",
  "FN",
  "PCOR",
  "GLOB",
  "SMTC",
  "TRU",
  "PLMR",
  "RRX",
  null,
  "MASI",
  "PLXS",
  "FTAI",
  "RJF",
  "WGS",
  "BRZE",
  "FTI",
  "ACN",
  "ITT",
  "MWA",
  "MTSI",
  "MOG-A",
  "GOOGL",
  "PTCT",
  "PRCT",
  "RIOT",
  "ALNY",
  "ALGM",
  "AIG",
  "TEAM",
  "AVGO",
  "APP",
  "CLS",
  "AIT",
  null,
  "FORM",
  "BYD",
  "BSX",
  "CMI",
  "DT",
  "MARA",
  "ROKU",
  "PRIM",
  "UEC",
  "FFIV",
  "SN",
  "BIRK",
  "RCKT",
  "BCYC",
  "LENZ",
  "LEGN",
  "HLT",
  "HD",
  "INTU",
  "UNP",
  "GENI",
  "ISRG",
  "HEI-A",
  "HUBS",
  "HLI",
  "HWM",
  "ITW",
  "AMAT",
  "BKNG",
  "META",
  "RRR",
  "KNSL",
  "LRCX",
  "PODD",
  "MDT",
  "BMI",
  "MSFT",
  "EQIX",
  "EQT",
  "FCNCA",
  "FICO",
  "FIS",
  "HQY",
  "RHI",
  "NU",
  "ICLR",
  "AMP",
  "ANET",
  "ORCL",
  "IWF",
  "PGR",
  "UNH",
  "AAPL",
  "NVDA",
  "GEHC",
  "PLTR",
  "PFE",
  "PG",
  "PSTG",
  "LPLA",
  "MKC",
  "MDB",
  "IOT",
  "ROK",
  "SPGI",
  "NOW",
  "IBM",
  "TPR",
  "TXRH",
  "TMO",
  "TJX",
  "TDG",
  "TW",
  "TWLO",
  "PCTY",
  "RKLB",
  "EWBC",
  "RYTM",
  "TLN",
  "MLTX",
  "SLNO",
  "STAG",
  "ETNB",
  "TOST",
  "TSCO",
  "NXT",
  "GKOS",
  "SNY",
  "TSM",
  "IT",
  "GPN",
  "PR",
  null,
  "TT",
  "ANF",
  "VRT",
  "SAIA",
  "RYAN",
  "LECO",
  "PRI",
  "MLI",
  "SFM",
  "AVY",
  "AXON",
  "FI",
  "NTRA",
  "IP",
  "AJG",
  "IWP",
  "WCN",
  "OPCH",
  "FOUR",
  "CAH",
  "EXTR",
  "KMPR",
  "IEX",
  "AMZN",
  "RMBS",
  "DKS",
  "KD",
  "DKNG",
  "VECO",
  "V",
  "VST",
  "WMT",
  "WDC",
  "WLY",
  "WSM",
  "WTFC",
  "WMB",
  "WSC",
  "WIX",
  "XENE",
  "ONTO",
  "CART",
  "PACK",
  "NOG",
  "G",
  "MTB",
  "FLR",
  "CHKP",
  "JBHT",
  "MSCI",
  "LSPD",
  "KEY",
  "NXPI",
  "MNDY",
  "TER",
  "TTD",
  "SPXC",
  "OKTA",
  "ROL",
  "CRM",
  "S",
  "SLAB",
  "SPOT",
  "LYV",
  "LNTH",
  "GEV",
  "MELI",
  "PCVX",
  "IRTC",
  "WNS",
  "AME",
  "AVNT",
  "AXTA",
  "BAC",
  "BIO",
  "TECH",
  "OWL",
  "EAT",
  "BFAM",
  "CWST",
  "CHX",
  "CIEN",
  "CHDN",
  "CTAS",
  "KO",
  "CMA",
  "COHR",
  "COIN",
  "FIX",
  "CPRT",
  "COST",
  "CSGP",
  "CRDO",
  "CRWD",
  "CSX",
  "DHR",
  "DDOG",
  "CYTK",
  "DAY",
  "DSGX",
  "FANG",
  "DXCM",
  "VMC",
  "NEE",
  "MAR",
  "GOOG",
  "LLY",
  "TSLA",
  "NFLX",
  "APO"
]

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: westfield-capital-management-co-lp
Manager Name: Westfield-Capital-Management-Co-Lp

Data Enrichment

99% identified

241 identified3 unidentified

Holdings

SEC FilingSEC DataHachi Filing

Manager:

244 positions • $20.5B total value

SEC FilingSEC DataHachi Filing

Manager:

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Ascendis Pharma A/S

ASND|04351P101

Shares:5.5M

Value:$854.0M

% of Portfolio:4.2% ($854.0M/$20.5B)

NVIDIA CORP

NVDA|67066G104

Shares:7.3M

Value:$795.1M

% of Portfolio:3.9% ($795.1M/$20.5B)

Apple Inc.

AAPL|037833100

Shares:3.4M

Value:$755.5M

% of Portfolio:3.7% ($755.5M/$20.5B)

MICROSOFT CORP

MSFT|594918104

Shares:1.8M

Value:$687.9M

% of Portfolio:3.3% ($687.9M/$20.5B)

AMAZON COM INC

AMZN|023135106

Shares:3.5M

Value:$658.8M

% of Portfolio:3.2% ($658.8M/$20.5B)

Alphabet Inc.

GOOGL|02079K305

Shares:3.5M

Value:$535.0M

% of Portfolio:2.6% ($535.0M/$20.5B)

Meta Platforms, Inc.

META|30303M102

Shares:898.5K

Value:$517.9M

% of Portfolio:2.5% ($517.9M/$20.5B)

AXON ENTERPRISE, INC.

AXON|05464C101

Shares:927.8K

Value:$488.0M

% of Portfolio:2.4% ($488.0M/$20.5B)

TransDigm Group INC

TDG|893641100

Shares:316.2K

Value:$437.3M

% of Portfolio:2.1% ($437.3M/$20.5B)

VISA INC.

V|92826C839

Shares:904.4K

Value:$317.0M

% of Portfolio:1.5% ($317.0M/$20.5B)

COMFORT SYSTEMS USA INC

FIX|199908104

Shares:889.6K

Value:$286.8M

% of Portfolio:1.4% ($286.8M/$20.5B)

LPL Financial Holdings Inc.

LPLA|50212V100

Shares:830.1K

Value:$271.6M

% of Portfolio:1.3% ($271.6M/$20.5B)

ServiceNow, Inc.

NOW|81762P102

Shares:320.3K

Value:$255.0M

% of Portfolio:1.2% ($255.0M/$20.5B)

TAPESTRY, INC.

TPR|876030107

Shares:3.6M

Value:$253.6M

% of Portfolio:1.2% ($253.6M/$20.5B)

Legend Biotech Corp

LEGN|52490G102

Shares:6.9M

Value:$234.7M

% of Portfolio:1.1% ($234.7M/$20.5B)

Broadcom Inc.

AVGO|11135F101

Shares:1.4M

Value:$234.1M

% of Portfolio:1.1% ($234.1M/$20.5B)

ELI LILLY & Co

LLY|532457108

Shares:259.0K

Value:$213.9M

% of Portfolio:1.0% ($213.9M/$20.5B)

FTAI Aviation Ltd.

FTAI|G3730V105

Shares:1.9M

Value:$210.1M

% of Portfolio:1.0% ($210.1M/$20.5B)

Salesforce, Inc.

CRM|79466L302

Shares:782.9K

Value:$210.1M

% of Portfolio:1.0% ($210.1M/$20.5B)

PROGRESSIVE CORP/OH/

PGR|743315103

Shares:712.2K

Value:$201.6M

% of Portfolio:1.0% ($201.6M/$20.5B)

Instrument	Shares		Other Manager	Value	% of Portfolio
Ascendis Pharma A/S(ASNDcusip04351P101)	5.5M	QoQ -0.88% (-49.0K) YoY +34.45% (+1.4M)	All Managers (Combined)	$854.0M	4.2% ($854.0M/$20.5B)	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	3.9% ($795.1M/$20.5B)	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	3.7% ($755.5M/$20.5B)	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	3.3% ($687.9M/$20.5B)	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	3.2% ($658.8M/$20.5B)	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	2.6% ($535.0M/$20.5B)	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	2.5% ($517.9M/$20.5B)	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	2.4% ($488.0M/$20.5B)	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	2.1% ($437.3M/$20.5B)	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	1.5% ($317.0M/$20.5B)	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	1.4% ($286.8M/$20.5B)	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	1.3% ($271.6M/$20.5B)	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	1.2% ($255.0M/$20.5B)	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	1.2% ($253.6M/$20.5B)	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	1.1% ($234.7M/$20.5B)	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	1.1% ($234.1M/$20.5B)	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	1.0% ($213.9M/$20.5B)	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	1.0% ($210.1M/$20.5B)	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	1.0% ($210.1M/$20.5B)	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	1.0% ($201.6M/$20.5B)	QoQ +12.44% (-$22.3M) YoY +57.85% (+$73.9M)