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Westfield Capital Management Co LP

Q2 2026 Holdings

Filed 2026-08-12 | 278 holdings | $30.6B | 13F-HR | View on SEC ↗ · Holdings Table ↗

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IssuerClassCUSIPValue ↓Shares% Portfolio
Nvidia Corporation(NVDA)COM67066G104$1.6B8,079,9265.3%
Alphabet Inc(GOOGL)CAP STK CL A02079K305$1.3B3,749,0744.4%
Ascendis Pharma A/S(ASND)ORD SHSK08588103$1.3B4,798,2674.2%
Axon Enterprise Inc(AXON)COM05464C101$836.1M1,491,4902.7%
Ftai Aviation LTD(FTAI)SHSG3730V105$794.6M2,937,2282.6%
Apple Inc(AAPL)COM037833100$744.7M2,573,7742.4%
Comfort SYS USA Inc(FIX)COM199908104$704.5M355,4332.3%
Broadcom Inc(AVGO)COM11135F101$588.0M1,556,5221.9%
Microsoft Corp(MSFT)COM594918104$527.6M1,414,2941.7%
Howmet Aerospace Inc(HWM)COM443201108$516.6M1,921,4761.7%
ELI Lilly & Co(LLY)COM532457108$499.8M416,7321.6%
Snowflake Inc(SNOW)COM SHS833445109$441.9M1,736,4981.4%
MKS Inc.(MKSI)COM55306N104$413.0M928,6171.3%
Meta Platforms Inc(META)CL A30303M102$381.6M677,3891.2%
Vertiv Holdings Co(VRT)COM CL A92537N108$353.0M1,054,3611.2%
GE Vernova Inc(GEV)COM36828A101$283.5M241,2720.9%
Micron Technology Inc(MU)COM595112103$263.4M228,2030.9%
Visa Inc(V)COM CL A92826C839$261.6M762,4030.9%
API Group Corp(APG)COM STK00187Y100$260.6M6,154,3010.9%
Tapestry Inc(TPR)COM876030107$248.3M1,696,5690.8%
Rhythm Pharmaceuticals Inc(RYTM)COM76243J105$245.2M2,208,5950.8%
Life Time Group Holdings Inc(LTH)COMMON STOCK53190C102$244.8M5,995,2540.8%
Taiwan Semiconductor Manufac(TSM)SPONSORED ADS874039100$244.0M510,9990.8%
Guardant Health Inc(GH)COM40131M109$243.7M1,624,4590.8%
Quanta Svcs Inc(PWR)COM74762E102$238.7M331,4890.8%
Servicenow Inc(NOW)COM81762P102$235.7M2,373,7110.8%
Advanced Micro Devices Inc(AMD)COM007903107$234.2M403,0810.8%
Palo Alto Networks Inc(PANW)COM697435105$224.5M658,3310.7%
Woodward Inc(WWD)COM980745103$224.0M526,5050.7%
Arista Networks Inc(ANET)COM SHS040413205$223.7M1,317,0960.7%
LPL Finl Hldgs Inc(LPLA)COM50212V100$223.4M793,0610.7%
Rocket LAB Corp(RKLB)COM773121108$214.9M2,114,0050.7%
Amer Sports Inc(AS)COM SHSG0260P102$214.7M6,344,9230.7%
Cloudflare Inc(NET)CL A COM18915M107$204.9M835,5020.7%
Amazon COM Inc(AMZN)COM023135106$204.9M859,8060.7%
Garmin LTD(GRMN)SHSH2906T109$204.5M861,0570.7%
Regal Rexnord Corporation(RRX)COM758750103$204.1M856,9760.7%
Natera Inc(NTRA)COM632307104$197.2M726,6280.6%
Morgan Stanley(MS)COM NEW617446448$196.6M940,5600.6%
Carpenter Technology Corp(CRS)COM144285103$193.7M314,0820.6%
Samsara Inc(IOT)COM CL A79589L106$189.3M5,836,4590.6%
Dynatrace Inc(DT)COM NEW268150109$186.6M4,249,2290.6%
Caterpillar Inc(CAT)COM149123101$186.0M174,6200.6%
Semtech Corp(SMTC)COM816850101$183.4M1,133,2680.6%
Ametek Inc(AME)COM031100100$175.1M723,7980.6%
Abivax SA(ABVX)SPONSORED ADS00370M103$174.5M1,309,8250.6%
Insmed Inc(INSM)COM PAR $.01457669307$173.7M1,629,5610.6%
ITT Inc(ITT)COM45073V108$164.2M830,3820.5%
Gilead Sciences Inc(GILD)COM375558103$162.7M1,287,6290.5%
PTC Therapeutics Inc(PTCT)COM69366J200$159.6M1,956,1560.5%
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