Westfield Capital Management Co Lp Top Holdings and 13F Report (2025) About Westfield Capital Management Co LpInvestment ActivityWestfield Capital Management Co Lp has $23.84 billion in total holdings as of June 30, 2025.Westfield Capital Management Co Lp owns shares of 239 different stocks, but just 95 companies or ETFs make up 80% of its holdings.Approximately 15.49% of the portfolio was purchased this quarter.About 15.66% of the portfolio was sold this quarter.This quarter, Westfield Capital Management Co Lp has purchased 244 new stocks and bought additional shares in 72 stocks.Westfield Capital Management Co Lp sold shares of 114 stocks and completely divested from 44 stocks this quarter.Largest Holdings NVIDIA $1,192,088,997Ascendis Pharma A/S $940,911,882Microsoft $874,160,432Apple $716,901,778Amazon.com $680,208,241 Largest New Holdings this Quarter 053332102 - AutoZone $141,739,816 Holding771049103 - Roblox $120,040,875 HoldingV7780T103 - Royal Caribbean Cruises $110,389,697 Holding25809K105 - DOORDASH INC $90,753,196 Holding18915M107 - Cloudflare $87,868,163 Holding Largest Purchases this Quarter Howmet Aerospace 780,896 shares (about $145.35M)AutoZone 38,182 shares (about $141.74M)Applied Materials 689,272 shares (about $126.19M)Roblox 1,141,073 shares (about $120.04M)Royal Caribbean Cruises 352,525 shares (about $110.39M) Largest Sales this Quarter PALANTIR TECHNOLOGIES INC 1,891,411 shares (about $257.82M)Alphabet 888,279 shares (about $156.54M)Axon Enterprise 137,722 shares (about $114.03M)Atlassian 530,420 shares (about $107.72M)APPLOVIN CORP 295,904 shares (about $103.59M) 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 PortfolioSectorNVDANVIDIA$1,192,088,997$32,971,089 ▲2.8%7,545,3455.0%Computer and TechnologyASNDAscendis Pharma A/S$940,911,882$4,808,291 ▼-0.5%5,451,4013.9%MedicalMSFTMicrosoft$874,160,432$37,398,773 ▼-4.1%1,757,4243.7%Computer and TechnologyAAPLApple$716,901,778$19,081,016 ▲2.7%3,494,1843.0%Computer and TechnologyAMZNAmazon.com$680,208,241$79,468,332 ▼-10.5%3,100,4522.9%Retail/WholesaleAXONAxon Enterprise$654,138,292$114,025,602 ▼-14.8%790,0792.7%AerospaceMETAMeta Platforms$633,577,596$29,623,965 ▼-4.5%858,4022.7%Computer and TechnologyFIXComfort Systems USA$502,113,479$25,080,150 ▲5.3%936,4122.1%ConstructionGOOGLAlphabet$453,199,576$156,541,404 ▼-25.7%2,571,6371.9%Computer and TechnologyTDGTransdigm Group$441,005,066$39,763,188 ▼-8.3%290,0131.8%AerospaceAVGOBroadcom$368,307,525$17,134,679 ▼-4.4%1,336,1421.5%Computer and TechnologyHWMHowmet Aerospace$356,616,739$145,348,187 ▲68.8%1,915,9551.5%AerospaceVRTVertiv$338,669,733$33,365,673 ▲10.9%2,637,4091.4%Computer and TechnologyNFLXNetflix$337,357,047$50,913,632 ▲17.8%251,9231.4%Consumer DiscretionaryNOWServiceNow$306,651,970$22,626,013 ▼-6.9%298,2761.3%Computer and TechnologyTPRTapestry$300,243,907$15,987,479 ▼-5.1%3,419,2451.3%Retail/WholesaleLPLALPL Financial$293,313,384$17,948,680 ▼-5.8%782,2321.2%FinanceVVisa$282,784,203$38,321,969 ▼-11.9%796,4631.2%Business ServicesLLYEli Lilly and Company$239,699,644$37,839,107 ▲18.7%307,4931.0%MedicalLEGNLegend Biotech$229,710,688$15,793,759 ▼-6.4%6,472,5471.0%MedicalEATBrinker International$222,993,012$43,436,087 ▲24.2%1,236,5830.9%Retail/WholesaleFTAI AVIATION LTD$220,348,881$2,641,318 ▲1.2%1,915,4110.9%SHSDXCMDexCom$207,770,942$5,892,511 ▼-2.8%2,380,2380.9%MedicalMNDYmonday.com$203,254,651$5,926,059 ▼-2.8%646,3200.9%Computer and TechnologyBACBank of America$199,584,401$41,322,852 ▲26.1%4,217,7600.8%FinanceMASIMasimo$198,702,016$85,745,792 ▲75.9%1,181,2030.8%MedicalFNFabrinet$195,464,203$99,063,466 ▲102.8%663,3100.8%Computer and TechnologyARESAres Management$186,842,824$8,598,689 ▼-4.4%1,078,7690.8%FinanceCWSTCasella Waste Systems$179,105,182$5,130,256 ▲2.9%1,552,3070.8%Business ServicesCRMSalesforce$176,559,788$36,937,245 ▼-17.3%647,4740.7%Computer and TechnologyGE VERNOVA INC$172,126,365$99,204,640 ▼-36.6%325,2880.7%COMDTDynatrace$162,964,792$2,273,161 ▲1.4%2,951,7260.7%Computer and TechnologyCHKPCheck Point Software Technologies$150,219,430$41,099,171 ▼-21.5%678,9580.6%Computer and TechnologyBMIBadger Meter$150,107,565$65,842,315 ▲78.1%612,8090.6%Computer and TechnologyORCLOracle$148,436,546$4,325,810 ▼-2.8%678,9400.6%Computer and TechnologyCOSTCostco Wholesale$143,170,902$3,494,484 ▼-2.4%144,6260.6%Retail/WholesaleAZOAutoZone$141,739,816$141,739,816 ▲New Holding38,1820.6%Retail/WholesaleIOTSamsara$141,183,450$1,022,983 ▲0.7%3,549,1060.6%Computer and TechnologyTSLATesla$139,266,272$11,533,281 ▼-7.6%438,4130.6%Auto/Tires/TrucksSNSharkNinja$139,056,316$17,319,985 ▲14.2%1,404,7510.6%Retail/WholesaleINSMInsmed$134,785,944$6,775,185 ▼-4.8%1,339,2880.6%MedicalHQYHealthEquity$132,543,190$73,522,558 ▲124.6%1,265,2080.6%MedicalTXRHTexas Roadhouse$132,240,619$669,803 ▲0.5%705,6220.6%Retail/WholesaleTSMTaiwan Semiconductor Manufacturing$131,435,012$16,998,970 ▼-11.5%580,3130.6%Computer and TechnologyAMATApplied Materials$127,129,472$126,185,014 ▲13,360.6%694,4310.5%Computer and TechnologyRRXRegal Rexnord$126,134,190$18,996,428 ▼-13.1%870,1310.5%IndustrialsSMTCSemtech$124,011,316$64,320,392 ▲107.8%2,747,2600.5%Computer and TechnologyLNTHLantheus$122,386,594$7,700,816 ▼-5.9%1,495,0720.5%MedicalGKOSGlaukos$120,627,536$8,642,171 ▲7.7%1,167,8530.5%MedicalPGRProgressive$120,175,258$69,895,395 ▼-36.8%450,3310.5%FinanceRBLXRoblox$120,040,875$120,040,875 ▲New Holding1,141,0730.5%Consumer DiscretionarySLNOSoleno Therapeutics$119,784,958$18,306,852 ▲18.0%1,429,7560.5%MedicalDKNGDraftKings$113,372,222$67,839,078 ▼-37.4%2,643,3250.5%Consumer DiscretionaryNTRANatera$113,171,063$3,624,101 ▼-3.1%669,8890.5%MedicalRCLRoyal Caribbean Cruises$110,389,697$110,389,697 ▲New Holding352,5250.5%Consumer DiscretionaryIPInternational Paper$108,818,543$9,641,735 ▲9.7%2,323,6930.5%Basic MaterialsAPOApollo Global Management$108,065,334$38,038,034 ▲54.3%761,7210.5%FinanceMRUSMerus$107,429,609$28,465,437 ▲36.0%2,042,3880.5%MedicalROLRollins$105,964,320$100,726,626 ▲1,923.1%1,878,1340.4%ConstructionITTITT$103,076,518$3,423,756 ▲3.4%657,2500.4%Multi-Sector ConglomeratesRYTMRhythm Pharmaceuticals$102,966,083$18,222,479 ▲21.5%1,629,4680.4%MedicalPCORProcore Technologies$102,957,527$25,619,116 ▼-19.9%1,504,7870.4%Computer and TechnologyAJGArthur J. Gallagher & Co.$102,952,407$969,642 ▼-0.9%321,6060.4%FinanceLYVLive Nation Entertainment$102,527,011$53,746,616 ▲110.2%677,7300.4%Consumer DiscretionaryMTSIMACOM Technology Solutions$101,654,653$1,786,970 ▼-1.7%709,4330.4%Computer and TechnologyVSTVistra$100,642,867$36,231,634 ▲56.3%519,2860.4%UtilitiesTWLOTwilio$100,332,280$1,514,083 ▼-1.5%806,7890.4%Computer and TechnologyGLOBGlobant$99,971,771$25,442,555 ▲34.1%1,100,5260.4%Computer and TechnologyPCVXVaxcyte$99,769,874$29,706,370 ▲42.4%3,068,8980.4%MedicalKDKyndryl$99,669,854$22,516,156 ▼-18.4%2,375,3540.4%Business ServicesOPCHOption Care Health$99,436,676$35,177,886 ▼-26.1%3,061,4740.4%MedicalOWLBlue Owl Capital$98,978,757$7,709,376 ▼-7.2%5,152,4600.4%FinanceROKURoku$96,477,468$1,760,612 ▼-1.8%1,097,7070.4%Consumer DiscretionaryHEI.AHeico$93,424,793$88,216,155 ▲1,693.7%361,0620.4%AerospaceUNPUnion Pacific$92,099,898$6,067,211 ▼-6.2%400,2950.4%TransportationPRCTPROCEPT BioRobotics$92,064,902$48,948,019 ▲113.5%1,598,3490.4%MedicalDOORDASH INC$90,753,196$90,753,196 ▲New Holding368,1520.4%CL ANETCloudflare$87,868,163$87,868,163 ▲New Holding448,6960.4%Computer and TechnologyRYANRyan Specialty$87,014,622$13,705,560 ▲18.7%1,279,8150.4%FinanceITGartner$86,069,360$80,260,718 ▲1,381.7%212,9270.4%Business ServicesROCKET LAB CORP$84,597,767$84,597,767 ▲New Holding2,365,0480.4%COMKMPRKemper$84,560,695$7,586,161 ▲9.9%1,310,2060.4%FinanceSNOWSnowflake$83,605,539$83,605,539 ▲New Holding373,6230.4%Computer and TechnologyMSCIMSCI$83,258,246$18,038,133 ▼-17.8%144,3600.3%FinanceBIRKENSTOCK HOLDING PLC$82,472,401$5,127,753 ▲6.6%1,676,9500.3%COM SHSKEYKeyCorp$81,504,487$29,792,607 ▲57.6%4,678,7880.3%FinanceTRUTransUnion$81,161,168$8,118,704 ▲11.1%922,2860.3%Business ServicesICEIntercontinental Exchange$80,860,069$80,860,069 ▲New Holding440,7260.3%FinanceCORCencora$80,585,155$6,062,058 ▼-7.0%268,7520.3%MedicalSFMSprouts Farmers Market$78,758,837$1,423,313 ▲1.8%478,3700.3%Retail/WholesaleWSCWillScot$78,392,249$1,587,720 ▲2.1%2,861,0310.3%FinanceFICOFair Isaac$77,330,484$11,923,855 ▼-13.4%42,3040.3%Computer and TechnologyIEXIDEX$77,016,238$1,148,052 ▼-1.5%438,6640.3%IndustrialsUNHUnitedHealth Group$71,763,286$1,915,805 ▼-2.6%230,0330.3%MedicalNXTNextracker$71,635,955$4,045,835 ▲6.0%1,317,5640.3%EnergyAMEAMETEK$71,554,529$2,074,165 ▼-2.8%395,4160.3%Computer and TechnologyROKRockwell Automation$71,310,408$1,720,644 ▼-2.4%214,6800.3%Computer and TechnologyPINSPinterest$71,221,295$71,221,295 ▲New Holding1,986,0930.3%Computer and TechnologyTOSTToast$70,981,546$60,796,263 ▲596.9%1,602,6540.3%Computer and TechnologyHUBSHubSpot$69,805,374$22,961,012 ▼-24.8%125,4070.3%Computer and TechnologyShowing largest 100 holdings. 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