Westfield Capital Management Co Lp Top Holdings and 13F Report (2025) About Westfield Capital Management Co LpInvestment ActivityWestfield 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 $853,997,354NVIDIA $795,146,517Apple $755,504,793Microsoft $687,944,002Amazon.com $658,808,796 Largest New Holdings this Quarter 443201108 - Howmet Aerospace $147,251,209 Holding60937P106 - MongoDB $128,706,298 Holding460146103 - International Paper $112,984,897 Holding03073E105 - Cencora $80,359,349 HoldingM2029K104 - 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 LTD 596,253 shares (about $66.20M) Sector Allocation Over TimeMap of 500 Largest Holdings ofWestfield Capital Management Co Lp Selling Neutral Buying Latest 13F Holdings and Changes Since Previous Quarterly FilingIssuer NameHoldings ValueApproximate Purchase/SaleChange in SharesShares Held% of PortfolioSectorASNDAscendis Pharma A/S$853,997,354$7,634,023 ▼-0.9%5,479,2594.2%MedicalNVDANVIDIA$795,146,517$6,847,773 ▼-0.9%7,336,6543.9%Computer and TechnologyAAPLApple$755,504,793$56,387,257 ▼-6.9%3,401,1833.7%Computer and TechnologyMSFTMicrosoft$687,944,002$15,090,681 ▼-2.1%1,832,6113.3%Computer and TechnologyAMZNAmazon.com$658,808,796$3,886,632 ▲0.6%3,462,6763.2%Retail/WholesaleGOOGLAlphabet$535,041,341$2,396,301 ▼-0.4%3,459,9162.6%Computer and TechnologyMETAMeta Platforms$517,881,469$1,395,368 ▼-0.3%898,5382.5%Computer and TechnologyAXONAxon Enterprise$487,976,732$111,991,013 ▲29.8%927,8012.4%AerospaceTDGTransdigm Group$437,343,361$63,708,750 ▼-12.7%316,1622.1%AerospaceVVisa$316,954,828$1,662,932 ▲0.5%904,3971.5%Business ServicesFIXComfort Systems USA$286,757,339$1,454,353 ▲0.5%889,6391.4%ConstructionLPLALPL Financial$271,558,617$40,624,250 ▲17.6%830,0991.3%FinanceNOWServiceNow$254,991,209$4,172,575 ▲1.7%320,2841.2%Computer and TechnologyTPRTapestry$253,568,509$253,758 ▼-0.1%3,601,3141.2%Retail/WholesaleLEGNLegend Biotech$234,713,042$40,847,342 ▲21.1%6,917,5671.1%MedicalAVGOBroadcom$234,117,929$7,254,074 ▲3.2%1,398,3031.1%Computer and TechnologyLLYEli Lilly and Company$213,871,325$32,176,670 ▲17.7%258,9521.0%MedicalFTAI AVIATION LTD$210,118,835$66,201,971 ▼-24.0%1,892,4511.0%SHSCRMSalesforce$210,106,873$49,868,276 ▲31.1%782,9291.0%Computer and TechnologyPGRProgressive$201,573,717$10,164,877 ▼-4.8%712,2491.0%FinanceNFLXNetflix$199,471,284$12,642,329 ▲6.8%213,9031.0%Consumer DiscretionaryCHKPCheck Point Software Technologies$197,086,293$134,430,859 ▲214.6%864,7171.0%Computer and TechnologyVRTVertiv$171,660,668$96,924,006 ▼-36.1%2,377,5720.8%Computer and TechnologyCWSTCasella Waste Systems$168,139,573$1,389,415 ▼-0.8%1,507,8430.8%Business ServicesDXCMDexCom$167,156,364$6,975,277 ▲4.4%2,447,7430.8%MedicalARESAres Management$165,436,898$25,604,700 ▲18.3%1,128,4150.8%FinanceMNDYmonday.com$161,741,337$7,960,089 ▼-4.7%665,1640.8%Computer and TechnologyPALANTIR TECHNOLOGIES INC$160,228,067$889,492 ▼-0.6%1,898,4370.8%CL AGE VERNOVA INC$156,537,407$30,232,774 ▼-16.2%512,7670.8%COMTEAMAtlassian$156,268,938$20,926,034 ▲15.5%736,3880.8%Computer and TechnologyLNTHLantheus$155,100,552$3,323,475 ▲2.2%1,589,1450.8%MedicalEATBrinker International$148,411,023$74,956,798 ▲102.0%995,7130.7%Retail/WholesaleHWMHowmet Aerospace$147,251,209$147,251,209 ▲New Holding1,135,0590.7%AerospaceOPCHOption Care Health$144,851,568$109,068,150 ▼-43.0%4,144,5370.7%MedicalPODDInsulet$141,349,160$20,890,380 ▼-12.9%538,2470.7%MedicalDKNGDraftKings$140,313,035$66,985 ▲0.0%4,225,0240.7%Consumer DiscretionaryCOSTCostco Wholesale$140,122,511$338,588 ▼-0.2%148,1560.7%Retail/WholesaleBACBank of America$139,565,812$48,009,153 ▲52.4%3,344,4960.7%FinanceDTDynatrace$137,232,574$2,921,037 ▲2.2%2,910,5530.7%Computer and TechnologyIOTSamsara$135,051,547$3,073,530 ▼-2.2%3,523,3900.7%Computer and TechnologySAIASaia$130,513,153$11,782,430 ▲9.9%373,5030.6%TransportationMDBMongoDB$128,706,298$128,706,298 ▲New Holding733,7870.6%Computer and TechnologyDKSDICK'S Sporting Goods$127,096,786$120,739,387 ▲1,899.2%630,5660.6%Retail/WholesalePCORProcore Technologies$124,066,501$8,323,141 ▲7.2%1,879,2260.6%Computer and TechnologyUNHUnitedHealth Group$123,696,158$48,651,148 ▼-28.2%236,1740.6%MedicalTSLATesla$123,028,556$48,044,942 ▼-28.1%474,7200.6%Auto/Tires/TrucksTXRHTexas Roadhouse$116,982,258$1,483,674 ▲1.3%702,0480.6%Retail/WholesaleRRXRegal Rexnord$113,984,001$15,666,215 ▼-12.1%1,001,1770.6%IndustrialsIPInternational Paper$112,984,897$112,984,897 ▲New Holding2,117,8050.5%Basic MaterialsAJGArthur J. Gallagher & Co.$112,077,146$7,456,159 ▼-6.2%324,6350.5%FinanceMASIMasimo$111,868,445$16,223,348 ▼-12.7%671,4790.5%MedicalOWLBlue Owl Capital$111,297,771$2,030,192 ▲1.9%5,553,7810.5%FinanceTSMTaiwan Semiconductor Manufacturing$108,790,894$24,620,948 ▼-18.5%655,3670.5%Computer and TechnologyINSMInsmed$107,310,201$35,708,145 ▲49.9%1,406,6090.5%MedicalGKOSGlaukos$106,705,389$27,265,588 ▲34.3%1,084,1840.5%MedicalSNSharkNinja$102,576,268$744,100 ▼-0.7%1,229,7840.5%Retail/WholesaleUNPUnion Pacific$100,795,274$85,991 ▼-0.1%426,6650.5%TransportationMSCIMSCI$99,322,020$15,096,567 ▲17.9%175,6360.5%FinanceNTRANatera$97,762,562$21,995,908 ▲29.0%691,3410.5%MedicalORCLOracle$97,688,945$18,569,436 ▼-16.0%698,7260.5%Computer and TechnologyFOURShift4 Payments$96,920,235$29,856,834 ▼-23.6%1,186,1490.5%Business ServicesGLOBGlobant$96,582,814$65,327,321 ▲209.0%820,4450.5%Computer and TechnologyHUBSHubSpot$95,209,369$582,715 ▲0.6%166,6570.5%Computer and TechnologyFLEXFlex$95,039,242$920,484 ▼-1.0%2,873,0120.5%Computer and TechnologyTWTradeweb Markets$93,534,551$7,937,265 ▲9.3%630,0320.5%FinanceKDKyndryl$91,435,670$53,312,019 ▼-36.8%2,911,9640.4%Business ServicesFICOFair Isaac$90,044,264$11,402,373 ▲14.5%48,8270.4%Computer and TechnologySLNOSoleno Therapeutics$86,543,455$23,563,138 ▲37.4%1,211,2450.4%MedicalPLMRPalomar$84,797,414$3,445,917 ▲4.2%618,5980.4%FinanceITTITT$82,070,718$13,885,992 ▼-14.5%635,4190.4%Multi-Sector ConglomeratesPCVXVaxcyte$81,377,973$15,542,847 ▼-16.0%2,155,1370.4%MedicalIEXIDEX$80,568,387$16,458,679 ▲25.7%445,2030.4%IndustrialsCORCencora$80,359,349$80,359,349 ▲New Holding288,9690.4%MedicalTWLOTwilio$80,184,765$9,530,266 ▲13.5%818,9640.4%Computer and TechnologyKMPRKemper$79,729,588$6,535,924 ▲8.9%1,192,6640.4%FinanceRYANRyan Specialty$79,649,072$30,260,772 ▲61.3%1,078,2330.4%FinanceAPPLOVIN CORP$78,746,011$13,439,297 ▼-14.6%297,1880.4%COM CL AROKURoku$78,733,535$101,715 ▼-0.1%1,117,7390.4%Consumer DiscretionaryPRIPrimerica$78,594,299$10,270,110 ▲15.0%276,2250.4%FinanceWSCWillScot$77,925,763$1,348,356 ▲1.8%2,803,0850.4%FinanceSPGIS&P Global$76,926,032$469,994 ▲0.6%151,3990.4%FinanceBFAMBright Horizons Family Solutions$75,631,740$14,198,880 ▼-15.8%595,3380.4%Business ServicesEWBCEast West Bancorp$73,361,387$49,148,627 ▲203.0%817,3060.4%FinanceMTSIMACOM Technology Solutions$72,464,716$26,979,632 ▼-27.1%721,9040.4%Computer and TechnologyBIRKENSTOCK HOLDING PLC$72,107,607$72,107,607 ▲New Holding1,572,6850.4%COM SHSSFMSprouts Farmers Market$71,698,824$71,698,824 ▲New Holding469,7250.3%Retail/WholesaleRYTMRhythm Pharmaceuticals$71,037,643$71,037,643 ▲New Holding1,341,0920.3%MedicalPERMIAN RESOURCES CORP$70,431,294$52,505 ▼-0.1%5,085,2920.3%CLASS A COMAVYAvery Dennison$70,131,570$176,190 ▼-0.3%394,0640.3%IndustrialsAMEAMETEK$70,040,021$771,360 ▼-1.1%406,8780.3%Computer and TechnologyPSTGPure Storage$68,967,091$7,782,313 ▼-10.1%1,557,8740.3%Computer and TechnologyTRUTransUnion$68,884,024$19,201,562 ▼-21.8%830,0280.3%Business ServicesJBHTJ.B. Hunt Transport Services$67,695,230$604,523 ▼-0.9%457,5550.3%TransportationAPOApollo Global Management$67,593,887$11,053,117 ▲19.5%493,6020.3%FinanceWCNWaste Connections$66,762,175$1,072,373 ▼-1.6%342,0370.3%Business ServicesNUNU$66,579,740$717,107 ▼-1.1%6,501,9280.3%FinanceDSGXThe Descartes Systems Group$65,784,618$5,745,596 ▲9.6%652,4310.3%Computer and TechnologyBMIBadger Meter$65,447,903$65,447,903 ▲New Holding344,0100.3%Computer and TechnologyFNFabrinet$64,612,829$16,647,130 ▼-20.5%327,1370.3%Computer and TechnologyIRTCiRhythm Technologies$64,595,725$15,510,959 ▼-19.4%617,0780.3%MedicalShowing largest 100 holdings. View all holdings. More Institutional Buying and Selling Information SEC Filings and Trading Data SEC Filings 13F Filings Top 13F Buys Top 13F Sells Get 30 Days of MarketBeat All Access for Free Sign up for MarketBeat All Access to gain access to MarketBeat's full suite of research tools. 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