Westfield Capital Management Co Lp Top Holdings and 13F Report (2025)

About Westfield Capital Management Co Lp

Investment Activity

Westfield Capital Management Co Lp has $20.55 billion in total holdings as of March 31, 2025.
Westfield Capital Management Co Lp owns shares of 244 different stocks, but just 93 companies or ETFs make up 80% of its holdings.
Approximately 14.10% of the portfolio was purchased this quarter.
About 15.93% of the portfolio was sold this quarter.
This quarter, Westfield Capital Management Co Lp has purchased 239 new stocks and bought additional shares in 76 stocks.
Westfield Capital Management Co Lp sold shares of 111 stocks and completely divested from 41 stocks this quarter.

Largest Holdings

Ascendis Pharma A/S: $853,997,354
NVIDIA: $795,146,517
Apple: $755,504,793
Microsoft: $687,944,002
Amazon.com: $658,808,796

Largest New Holdings this Quarter

443201108 - Howmet Aerospace: $147,251,209 Holding
60937P106 - MongoDB: $128,706,298 Holding
460146103 - International Paper: $112,984,897 Holding
03073E105 - Cencora: $80,359,349 Holding
M2029K104 - BIRKENSTOCK HOLDING PLC: $72,107,607 Holding

Largest Purchases this Quarter

Howmet Aerospace: 1,135,059 shares (about $147.25M)
Check Point Software Technologies: 589,816 shares (about $134.43M)
MongoDB: 733,787 shares (about $128.71M)
DICK'S Sporting Goods: 599,025 shares (about $120.74M)
International Paper: 2,117,805 shares (about $112.98M)

Largest Sales this Quarter

Option Care Health: 3,120,691 shares (about $109.07M)
Vertiv: 1,342,438 shares (about $96.92M)
Global Payments: 945,297 shares (about $92.56M)
F5: 271,395 shares (about $72.26M)
FTAI Aviation: 596,253 shares (about $66.20M)

Sector Allocation Over Time

Selling

Neutral

Buying

Latest 13F Holdings and Changes Since Previous Quarterly Filing

Issuer Name	Holdings Value	Approximate Purchase/Sale	Change in Shares	Shares Held	% of Portfolio	Sector
ASND Ascendis Pharma A/S	$853,997,354	$7,634,023 ▼	-0.9%	5,479,259	4.2%	Medical
NVDA NVIDIA	$795,146,517	$6,847,773 ▼	-0.9%	7,336,654	3.9%	Computer and Technology
AAPL Apple	$755,504,793	$56,387,257 ▼	-6.9%	3,401,183	3.7%	Computer and Technology
MSFT Microsoft	$687,944,002	$15,090,681 ▼	-2.1%	1,832,611	3.3%	Computer and Technology
AMZN Amazon.com	$658,808,796	$3,886,632 ▲	0.6%	3,462,676	3.2%	Retail/Wholesale
GOOGL Alphabet	$535,041,341	$2,396,301 ▼	-0.4%	3,459,916	2.6%	Computer and Technology
META Meta Platforms	$517,881,469	$1,395,368 ▼	-0.3%	898,538	2.5%	Computer and Technology
AXON Axon Enterprise	$487,976,732	$111,991,013 ▲	29.8%	927,801	2.4%	Aerospace
TDG TransDigm Group	$437,343,361	$63,708,750 ▼	-12.7%	316,162	2.1%	Aerospace
V Visa	$316,954,828	$1,662,932 ▲	0.5%	904,397	1.5%	Business Services
FIX Comfort Systems USA	$286,757,339	$1,454,353 ▲	0.5%	889,639	1.4%	Construction
LPLA LPL Financial	$271,558,617	$40,624,250 ▲	17.6%	830,099	1.3%	Finance
NOW ServiceNow	$254,991,209	$4,172,575 ▲	1.7%	320,284	1.2%	Computer and Technology
TPR Tapestry	$253,568,509	$253,758 ▼	-0.1%	3,601,314	1.2%	Retail/Wholesale
LEGN Legend Biotech	$234,713,042	$40,847,342 ▲	21.1%	6,917,567	1.1%	Medical
AVGO Broadcom	$234,117,929	$7,254,074 ▲	3.2%	1,398,303	1.1%	Computer and Technology
LLY Eli Lilly and Company	$213,871,325	$32,176,670 ▲	17.7%	258,952	1.0%	Medical
FTAI FTAI Aviation	$210,118,835	$66,201,971 ▼	-24.0%	1,892,451	1.0%	Aerospace
CRM Salesforce	$210,106,873	$49,868,276 ▲	31.1%	782,929	1.0%	Computer and Technology
PGR Progressive	$201,573,717	$10,164,877 ▼	-4.8%	712,249	1.0%	Finance
NFLX Netflix	$199,471,284	$12,642,329 ▲	6.8%	213,903	1.0%	Consumer Discretionary
CHKP Check Point Software Technologies	$197,086,293	$134,430,859 ▲	214.6%	864,717	1.0%	Computer and Technology
VRT Vertiv	$171,660,668	$96,924,006 ▼	-36.1%	2,377,572	0.8%	Computer and Technology
CWST Casella Waste Systems	$168,139,573	$1,389,415 ▼	-0.8%	1,507,843	0.8%	Business Services
DXCM DexCom	$167,156,364	$6,975,277 ▲	4.4%	2,447,743	0.8%	Medical
ARES Ares Management	$165,436,898	$25,604,700 ▲	18.3%	1,128,415	0.8%	Finance
MNDY monday.com	$161,741,337	$7,960,089 ▼	-4.7%	665,164	0.8%	Computer and Technology
PALANTIR TECHNOLOGIES INC	$160,228,067	$889,492 ▼	-0.6%	1,898,437	0.8%	CL A
GE VERNOVA INC	$156,537,407	$30,232,774 ▼	-16.2%	512,767	0.8%	COM
TEAM Atlassian	$156,268,938	$20,926,034 ▲	15.5%	736,388	0.8%	Computer and Technology
LNTH Lantheus	$155,100,552	$3,323,475 ▲	2.2%	1,589,145	0.8%	Medical
EAT Brinker International	$148,411,023	$74,956,798 ▲	102.0%	995,713	0.7%	Retail/Wholesale
HWM Howmet Aerospace	$147,251,209	$147,251,209 ▲	New Holding	1,135,059	0.7%	Aerospace
OPCH Option Care Health	$144,851,568	$109,068,150 ▼	-43.0%	4,144,537	0.7%	Medical
PODD Insulet	$141,349,160	$20,890,380 ▼	-12.9%	538,247	0.7%	Medical
DKNG DraftKings	$140,313,035	$66,985 ▲	0.0%	4,225,024	0.7%	Consumer Discretionary
COST Costco Wholesale	$140,122,511	$338,588 ▼	-0.2%	148,156	0.7%	Retail/Wholesale
BAC Bank of America	$139,565,812	$48,009,153 ▲	52.4%	3,344,496	0.7%	Finance
DT Dynatrace	$137,232,574	$2,921,037 ▲	2.2%	2,910,553	0.7%	Computer and Technology
IOT Samsara	$135,051,547	$3,073,530 ▼	-2.2%	3,523,390	0.7%	Computer and Technology
SAIA Saia	$130,513,153	$11,782,430 ▲	9.9%	373,503	0.6%	Transportation
MDB MongoDB	$128,706,298	$128,706,298 ▲	New Holding	733,787	0.6%	Computer and Technology
DKS DICK'S Sporting Goods	$127,096,786	$120,739,387 ▲	1,899.2%	630,566	0.6%	Retail/Wholesale
PCOR Procore Technologies	$124,066,501	$8,323,141 ▲	7.2%	1,879,226	0.6%	Computer and Technology
UNH UnitedHealth Group	$123,696,158	$48,651,148 ▼	-28.2%	236,174	0.6%	Medical
TSLA Tesla	$123,028,556	$48,044,942 ▼	-28.1%	474,720	0.6%	Auto/Tires/Trucks
TXRH Texas Roadhouse	$116,982,258	$1,483,674 ▲	1.3%	702,048	0.6%	Retail/Wholesale
RRX Regal Rexnord	$113,984,001	$15,666,215 ▼	-12.1%	1,001,177	0.6%	Industrials
IP International Paper	$112,984,897	$112,984,897 ▲	New Holding	2,117,805	0.5%	Basic Materials
AJG Arthur J. Gallagher & Co.	$112,077,146	$7,456,159 ▼	-6.2%	324,635	0.5%	Finance
MASI Masimo	$111,868,445	$16,223,348 ▼	-12.7%	671,479	0.5%	Medical
OWL Blue Owl Capital	$111,297,771	$2,030,192 ▲	1.9%	5,553,781	0.5%	Finance
TSM Taiwan Semiconductor Manufacturing	$108,790,894	$24,620,948 ▼	-18.5%	655,367	0.5%	Computer and Technology
INSM Insmed	$107,310,201	$35,708,145 ▲	49.9%	1,406,609	0.5%	Medical
GKOS Glaukos	$106,705,389	$27,265,588 ▲	34.3%	1,084,184	0.5%	Medical
SN SharkNinja	$102,576,268	$744,100 ▼	-0.7%	1,229,784	0.5%	Retail/Wholesale
UNP Union Pacific	$100,795,274	$85,991 ▼	-0.1%	426,665	0.5%	Transportation
MSCI MSCI	$99,322,020	$15,096,567 ▲	17.9%	175,636	0.5%	Finance
NTRA Natera	$97,762,562	$21,995,908 ▲	29.0%	691,341	0.5%	Medical
ORCL Oracle	$97,688,945	$18,569,436 ▼	-16.0%	698,726	0.5%	Computer and Technology
FOUR Shift4 Payments	$96,920,235	$29,856,834 ▼	-23.6%	1,186,149	0.5%	Business Services
GLOB Globant	$96,582,814	$65,327,321 ▲	209.0%	820,445	0.5%	Computer and Technology
HUBS HubSpot	$95,209,369	$582,715 ▲	0.6%	166,657	0.5%	Computer and Technology
FLEX Flex	$95,039,242	$920,484 ▼	-1.0%	2,873,012	0.5%	Computer and Technology
TW Tradeweb Markets	$93,534,551	$7,937,265 ▲	9.3%	630,032	0.5%	Finance
KD Kyndryl	$91,435,670	$53,312,019 ▼	-36.8%	2,911,964	0.4%	Business Services
FICO Fair Isaac	$90,044,264	$11,402,373 ▲	14.5%	48,827	0.4%	Computer and Technology
SLNO Soleno Therapeutics	$86,543,455	$23,563,138 ▲	37.4%	1,211,245	0.4%	Medical
PLMR Palomar	$84,797,414	$3,445,917 ▲	4.2%	618,598	0.4%	Finance
ITT ITT	$82,070,718	$13,885,992 ▼	-14.5%	635,419	0.4%	Multi-Sector Conglomerates
PCVX Vaxcyte	$81,377,973	$15,542,847 ▼	-16.0%	2,155,137	0.4%	Medical
IEX IDEX	$80,568,387	$16,458,679 ▲	25.7%	445,203	0.4%	Industrials
COR Cencora	$80,359,349	$80,359,349 ▲	New Holding	288,969	0.4%	Medical
TWLO Twilio	$80,184,765	$9,530,266 ▲	13.5%	818,964	0.4%	Computer and Technology
KMPR Kemper	$79,729,588	$6,535,924 ▲	8.9%	1,192,664	0.4%	Finance
RYAN Ryan Specialty	$79,649,072	$30,260,772 ▲	61.3%	1,078,233	0.4%	Finance
APPLOVIN CORP	$78,746,011	$13,439,297 ▼	-14.6%	297,188	0.4%	COM CL A
ROKU Roku	$78,733,535	$101,715 ▼	-0.1%	1,117,739	0.4%	Consumer Discretionary
PRI Primerica	$78,594,299	$10,270,110 ▲	15.0%	276,225	0.4%	Finance
WSC WillScot Mobile Mini	$77,925,763	$1,348,356 ▲	1.8%	2,803,085	0.4%	Finance
SPGI S&P Global	$76,926,032	$469,994 ▲	0.6%	151,399	0.4%	Business Services
BFAM Bright Horizons Family Solutions	$75,631,740	$14,198,880 ▼	-15.8%	595,338	0.4%	Business Services
EWBC East West Bancorp	$73,361,387	$49,148,627 ▲	203.0%	817,306	0.4%	Finance
MTSI MACOM Technology Solutions	$72,464,716	$26,979,632 ▼	-27.1%	721,904	0.4%	Computer and Technology
BIRKENSTOCK HOLDING PLC	$72,107,607	$72,107,607 ▲	New Holding	1,572,685	0.4%	COM SHS
SFM Sprouts Farmers Market	$71,698,824	$71,698,824 ▲	New Holding	469,725	0.3%	Retail/Wholesale
RYTM Rhythm Pharmaceuticals	$71,037,643	$71,037,643 ▲	New Holding	1,341,092	0.3%	Medical
PERMIAN RESOURCES CORP	$70,431,294	$52,505 ▼	-0.1%	5,085,292	0.3%	CLASS A COM
AVY Avery Dennison	$70,131,570	$176,190 ▼	-0.3%	394,064	0.3%	Industrials
AME AMETEK	$70,040,021	$771,360 ▼	-1.1%	406,878	0.3%	Computer and Technology
PSTG Pure Storage	$68,967,091	$7,782,313 ▼	-10.1%	1,557,874	0.3%	Computer and Technology
TRU TransUnion	$68,884,024	$19,201,562 ▼	-21.8%	830,028	0.3%	Business Services
JBHT J.B. Hunt Transport Services	$67,695,230	$604,523 ▼	-0.9%	457,555	0.3%	Transportation
APO Apollo Global Management	$67,593,887	$11,053,117 ▲	19.5%	493,602	0.3%	Finance
WCN Waste Connections	$66,762,175	$1,072,373 ▼	-1.6%	342,037	0.3%	Business Services
NU NU	$66,579,740	$717,107 ▼	-1.1%	6,501,928	0.3%	Finance
DSGX The Descartes Systems Group	$65,784,618	$5,745,596 ▲	9.6%	652,431	0.3%	Computer and Technology
BMI Badger Meter	$65,447,903	$65,447,903 ▲	New Holding	344,010	0.3%	Computer and Technology
FN Fabrinet	$64,612,829	$16,647,130 ▼	-20.5%	327,137	0.3%	Computer and Technology
IRTC iRhythm Technologies	$64,595,725	$15,510,959 ▼	-19.4%	617,078	0.3%	Medical

Showing largest 100 holdings. View all holdings.

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Westfield Capital Management Co Lp Top Holdings and 13F Report (2025)

About Westfield Capital Management Co Lp

Investment Activity

Largest Holdings

Largest New Holdings this Quarter

Largest Purchases this Quarter

Largest Sales this Quarter

Sector Allocation Over Time

Latest 13F Holdings and Changes Since Previous Quarterly Filing

More Institutional Buying and Selling Information

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools

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Westfield Capital Management Co Lp Top Holdings and 13F Report (2025)

About Westfield Capital Management Co Lp

Investment Activity

Largest Holdings

Largest New Holdings this Quarter

Largest Purchases this Quarter

Largest Sales this Quarter

Sector Allocation Over Time

Map of 500 Largest Holdings ofWestfield Capital Management Co Lp

Latest 13F Holdings and Changes Since Previous Quarterly Filing

More Institutional Buying and Selling Information

MarketBeat All Access Features

Best-in-Class Portfolio Monitoring

Stock Ideas and Recommendations

Advanced Stock Screeners and Research Tools