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13F-HR filed by WESTFIELD CAPITAL MANAGEMENT CO LP

WESTFIELD CAPITAL MANAGEMENT CO LP filed this 13F-HR for the quarter ended 2025-09-30, filed 2025-11-12, with 235 holding rows worth $23,832,915,424.

Accession
0001177719-25-000003
Filed
2025-11-12
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q3 2025

A holdings report, 235 entries on the cover page, a total value of $23,832,915,424 stated on the cover page (in dollars after the unit check, H1), rows summing to $23,832,915,424 with VALUE read as dollars as filed, 13F file number 028-10220. The quarter's positions are built on this report. The resolved quarter.

The information table after summing rows of one CUSIP and put or call (H4), with the CUSIP and issuer name as filed. Values in dollars after the unit check (method).

Issuer as filedCUSIPClassAmountValueValue read asType
NVIDIA Corp67066G104COM6,507,165$1,214,106,881dollars as filed
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR5,259,909$1,045,722,561dollars as filed
Microsoft Corp594918104COM1,705,236$883,226,964dollars as filed
Apple Inc037833100COM3,334,545$849,075,305dollars as filed
COMFORT SYS USA INC COM199908104Stock833,195$687,535,850dollars as filed
META PLATFORMS INC CL A30303M102COM767,657$563,751,665dollars as filed
Amazon.com, Inc023135106COM2,541,729$558,087,516dollars as filed
Alphabet Inc. Reg. Shares A02079K305COM2,244,650$545,674,381dollars as filed
AXONENTERPRISEINC05464C101STOK729,152$523,268,712dollars as filed
HOWMET AEROSPACE INC COM443201108Stock2,007,453$393,922,429dollars as filed
Broadcom Inc.11135F101COM1,166,362$384,794,528dollars as filed
FTAI AVIATION LTD SHSG3730V105Stock2,130,241$355,452,013dollars as filed
VERTIV HOLDINGS CO COM CL A92537N108Stock2,247,218$339,015,337dollars as filed
TRANSDIGM GROUP INC COM893641100Stock217,897$287,192,363dollars as filed
TAPESTRY INC COM876030107Stock2,450,671$277,464,973dollars as filed
Netflix, Inc64110L106COM230,648$276,528,706dollars as filed
SEMTECH CORP COM816850101Stock3,380,373$241,527,651dollars as filed
Visa Inc92826C839COM705,767$240,934,693dollars as filed
ServiceNow,Inc.81762P102COM260,002$239,274,514dollars as filed
MARVELL TECHNOLOGY INC573874104COM2,611,958$219,587,319dollars as filed
Eli Lilly and Company532457108COM277,005$211,354,506dollars as filed
MASIMO CORP COM574795100Stock1,419,250$209,410,274dollars as filed
MERUS N VN5749R100COM2,132,489$200,773,839dollars as filed
Bank of America Corp060505104COM3,861,103$199,194,291dollars as filed
LEGEND BIOTECH CORP52490G102SPONSORED ADS6,094,486$198,741,180dollars as filed
AUTOZONE INC COM053332102Stock45,770$196,363,654dollars as filed
LPL FINL HLDGS INC COM50212V100Stock575,462$191,450,388dollars as filed
Tesla Motors, Inc88160R101COM404,220$179,764,841dollars as filed
REGAL REXNORD CORPORATION758750103COM1,221,730$175,244,951dollars as filed
Oracle Corporation68389X105COM600,197$168,799,475dollars as filed
ROBLOX CORP CL A771049103Stock1,189,575$164,779,972dollars as filed
ARES MANAGEMENT CORPORATION CL A COM STK03990B101Stock1,027,589$164,301,259dollars as filed
GE Vernova Inc.36828A101COM265,736$163,401,018dollars as filed
HEALTHEQUITY INC COM42226A107Stock1,716,658$162,687,679dollars as filed
DYNATRACE INC COM NEW268150109Stock3,345,780$162,103,041dollars as filed
COHERENT CORP COM19247G107Stock1,472,963$158,667,530dollars as filed
CASELLA WASTE SYS INC147448104CL A1,647,907$156,353,416dollars as filed
DEXCOM INC COM252131107Stock2,312,210$155,588,634dollars as filed
COMMVAULT SYS INC COM204166102Stock786,175$148,414,117dollars as filed
EVERPURE INC CL A74624M102Stock1,751,558$146,798,079dollars as filed
SHARKNINJA INC COM SHSG8068L108Stock1,402,297$144,646,903dollars as filed
BLOOM ENERGY CORP093712107COM1,675,282$141,678,599dollars as filed
SAMSARA INC COM CL A79589L106Stock3,801,787$141,616,556dollars as filed
VAXCYTE INC COM92243G108Stock3,732,715$134,452,394dollars as filed
MONDAY COM LTD SHSM7S64H106Stock693,319$134,288,935dollars as filed
TAIWAN SEMICONDUCTOR MFG874039100SPONSORED ADS467,398$130,539,568dollars as filed
PRIMORIS SVCS CORP COM74164F103Stock947,308$130,093,808dollars as filed
SNOWFLAKE INC COM SHS833445109Stock574,955$129,681,197dollars as filed
REVOLUTION MEDICINES INC COM76155X100Stock2,513,967$117,402,259dollars as filed
ROCKETLABCORPCLASSCLASSA773121108STOK2,437,820$116,795,956dollars as filed
PROCORE TECHNOLOGIES INC COM74275K108Stock1,540,265$112,316,124dollars as filed
Palantir Technologies Inc. Class A69608A108COM606,450$110,628,668dollars as filed
ROKU INC COM CL A77543R102Stock1,102,488$110,392,123dollars as filed
ROYAL CARIBBEAN GROUP COMV7780T103Stock336,512$108,888,579dollars as filed
INTERNATIONAL PAPER CO COM460146103Stock2,341,336$108,637,990dollars as filed
RHYTHM PHARMACEUTICALS INC76243J105COM1,069,004$107,958,714dollars as filed
DOORDASH INC CL A25809K105Stock393,628$107,063,010dollars as filed
LIVE NATION ENTERTAINMENT INC COM538034109Stock646,370$105,616,906dollars as filed
HEICO CORP NEW422806208CL A409,498$104,049,347dollars as filed
NEXTPOWER INC CLASS A COM65290E101Stock1,398,057$103,442,237dollars as filed
CLOUDFLARE INC CL A COM18915M107Stock480,850$103,185,598dollars as filed
KARMAN HLDGS INC COMMON STOCK485924104Stock1,425,576$102,926,587dollars as filed
BIRKENSTOCK HOLDING PLCM2029K104COM SHS2,254,493$102,015,808dollars as filed
CENCORA INC COM03073E105Stock325,660$101,778,619dollars as filed
QUANTA SVCS INC74762E102COM245,506$101,742,529dollars as filed
ITT INC COM45073V108Stock568,027$101,540,507dollars as filed
GLAUKOS CORP COM377322102Stock1,231,641$100,440,324dollars as filed
MSCI INC COM55354G100Stock175,347$99,493,468dollars as filed
TRANSUNION COM89400J107Stock1,180,154$98,873,302dollars as filed
VISTRA CORP COM92840M102Stock492,560$96,502,365dollars as filed
DESCARTES SYS GROUP INC COM249906108Stock1,001,331$94,355,420dollars as filed
NATERA INC COM632307104Stock575,802$92,686,899dollars as filed
KRATOS DEFENSE & SEC SOLUTIO50077B207COM NEW1,005,816$91,901,408dollars as filed
XPO INC COM983793100Stock694,714$89,805,679dollars as filed
OREILLY AUTOMOTIVE INC COM67103H107Stock817,026$88,083,542dollars as filed
TOPBUILD COR COM89055F103Stock225,029$87,954,835dollars as filed
KKR & CO INC48251W104COM672,895$87,442,706dollars as filed
PALOMAR HLDGS INC COM69753M105Stock738,528$86,223,144dollars as filed
Costco Wholesale Corporation22160K105COM92,163$85,308,992dollars as filed
KEYCORP COM493267108Stock4,480,214$83,735,200dollars as filed
HOULIHAN LOKEY INC CL A441593100Stock406,306$83,422,748dollars as filed
UnitedHealth Group Inc91324P102COM241,010$83,220,919dollars as filed
GALLAGHER ARTHUR J & CO COM363576109Stock267,709$82,920,261dollars as filed
DRAFTKINGS INC NEW26142V105COM CL A2,080,438$77,808,396dollars as filed
ALKAMI TECHNOLOGY INC01644J108COM3,095,058$76,881,241dollars as filed
OPTION CARE HEALTH INC COM NEW68404L201Stock2,757,858$76,558,138dollars as filed
PALO ALTO NETWORKS INC697435105COM370,359$75,412,406dollars as filed
ADMA BIOLOGICS INC000899104COM5,106,802$74,865,717dollars as filed
BUILDERS FIRSTSOURCE INC COM12008R107Stock616,032$74,693,880dollars as filed
WYNN RESORTS LTD983134107COM573,694$73,587,729dollars as filed
C H ROBINSON WORLDWIDE IN COM NEW12541W209Stock550,825$72,929,230dollars as filed
VULCAN MATLS CO COM929160109Stock236,556$72,769,438dollars as filed
GENIUS SPORTS LIMITED SHARES CL AG3934V109Stock5,850,083$72,424,028dollars as filed
FIFTH THIRD BANCORP COM316773100Stock1,619,948$72,168,685dollars as filed
RYAN SPECIALTY HOLDINGS INC CL A78351F107Stock1,278,134$72,035,632dollars as filed
BLUE OWL CAPITAL INC COM CL A09581B103Stock4,228,444$71,587,557dollars as filed
ROCKWELL AUTOMATION INC COM773903109Stock204,335$71,421,329dollars as filed
PRIMERICA INC74164M108COM256,774$71,277,895dollars as filed
PROCEPT BIOROBOTICS CORP COM74276L105Stock1,970,147$70,314,546dollars as filed
INSMED INC COM PAR $.01457669307Stock487,927$70,266,367dollars as filed
RED ROCK RESORTS INC75700L108CL A1,147,417$70,061,282dollars as filed
ICON PUB LTD CO SHSG4705A100Stock396,354$69,362,023dollars as filed
CREDO TECHNOLOGY GROUP HOLDING ORDINARY SHARESG25457105Stock472,841$68,850,378dollars as filed
SAIA INC78709Y105COM227,908$68,226,539dollars as filed
RH74967X103COM332,901$67,632,167dollars as filed
AMETEK INC COM031100100Stock358,660$67,428,017dollars as filed
FIRSTCASH HOLDINGS INC33768G107COM422,455$66,925,321dollars as filed
LINCOLN ELEC HLDGS INC533900106COM282,963$66,731,164dollars as filed
PINTEREST INC CL A72352L106Stock2,023,270$65,088,596dollars as filed
VEEVA SYS INC CL A COM922475108Stock217,754$64,870,954dollars as filed
IDEX CORP COM45167R104Stock398,283$64,824,541dollars as filed
Intercontinental Exchange,Inc.45866F104COM378,565$63,780,686dollars as filed
HUBSPOTINC443573100STOK134,175$62,767,075dollars as filed
EAST WEST BANCORP INC COM27579R104Stock589,535$62,756,001dollars as filed
SYNOPSYS INC COM871607107Stock126,581$62,453,695dollars as filed
INSULET CORP COM45784P101Stock201,387$62,174,302dollars as filed
BRAZE INC10576N102COM CL A2,177,953$61,940,983dollars as filed
GLOBE LIFE INC37959E102COM430,642$61,568,887dollars as filed
ONTO INNOVATION INC COM683344105Stock474,530$61,318,767dollars as filed
APPLIED INDL TECHNOLOGIES INC COM03820C105Stock234,734$61,277,311dollars as filed
SOLENO THERAPEUTICS INC834203309COM899,157$60,783,013dollars as filed
HILTON WORLDWIDE HLDGS INC COM43300A203Stock233,718$60,635,726dollars as filed
WINTRUST FINL CORP COM97650W108Stock456,964$60,520,312dollars as filed
KINSALECAPGROUPINC49714P108STOK142,146$60,449,008dollars as filed
IDEXX LABS INC COM45168D104Stock94,129$60,138,155dollars as filed
FABRINET SHSG3323L100Stock163,002$59,433,852dollars as filed
TWILIO INC CL A90138F102Stock591,367$59,189,923dollars as filed
SPOTIFYTECHNOLOGYSAFL8681T102STOK84,006$58,636,078dollars as filed
GENEDX HOLDINGS CORP81663L200COM CL A544,094$58,620,688dollars as filed
TECHNIPFMC PLC COMG87110105Stock1,480,110$58,390,340dollars as filed
JABIL INC COM466313103Stock266,147$57,799,144dollars as filed
TTM TECHNOLOGIES INC87305R109COM994,282$57,270,643dollars as filed
CLEAN HARBORS INC COM184496107Stock243,582$56,564,612dollars as filed
CSX Corporation126408103COM1,592,570$56,552,162dollars as filed
MONGODB INC CL A60937P106Stock181,314$56,276,345dollars as filed
IRHYTHM HOLDINGS INC COM450056106Stock323,980$55,721,320dollars as filed
MACOM TECH SOLUTIONS HLDGS INC COM55405Y100Stock436,496$54,339,441dollars as filed
IMAX CORP45245E109COM1,622,625$53,140,969dollars as filed
BRINKER INTL INC COM109641100Stock416,056$52,705,974dollars as filed
BURLINGTON STORES INC COM122017106Stock205,895$52,400,344dollars as filed
TALEN ENERGY CORP COM87422Q109Stock123,078$52,354,920dollars as filed
AVIENT CORPORATION05368V106COM1,569,226$51,705,997dollars as filed
ATLASSIANCORPCLASSA049468101STOK322,438$51,493,293dollars as filed
AFFIRM HLDGS INC COM CL A00827B106Stock701,607$51,273,440dollars as filed
LATTICE SEMICONDUCTOR CORP COM518415104Stock696,706$51,082,484dollars as filed
STEPSTONE GROUP INC85914M107COM CL A778,728$50,858,726dollars as filed
WASTE CONNECTIONS INC COM94106B101Stock288,730$50,758,774dollars as filed
SHIFT4 PMTS INC CL A82452J109Stock653,828$50,606,287dollars as filed
RAMBUS INC DEL COM750917106Stock484,465$50,481,253dollars as filed
FAIR ISAAC CORP COM303250104Stock32,468$48,589,085dollars as filed
XENON PHARMACEUTICALS INC COM98420N105Stock1,206,066$48,423,550dollars as filed
89BIO INC282559103COM3,291,369$48,383,124dollars as filed
F N B CORP302520101COM2,985,673$48,099,192dollars as filed
NORTHERN OIL & GAS INC COM665531307Stock1,899,017$47,095,622dollars as filed
DIAMONDBACK ENERGY INC COM25278X109Stock319,664$45,743,974dollars as filed
VITA COCO CO INC92846Q107COM1,062,761$45,135,460dollars as filed
SILICON LABORATORIES INC COM826919102Stock342,310$44,887,110dollars as filed
BIO RAD LABS INC090572207CL A155,524$43,607,374dollars as filed
WILLSCOT HLDGS CORP971378104COM CL A2,049,820$43,271,700dollars as filed
PERMIAN RESOURCES CORP CLASS A COM71424F105Stock3,357,716$42,978,765dollars as filed
ENTEGRIS INC COM29362U104Stock460,440$42,572,282dollars as filed
CALIX INC13100M509COM684,096$41,982,972dollars as filed
NIQ GLOBAL INTELLIGENCE PLCG63755105ORDINARY SHARES2,631,896$41,320,767dollars as filed
ROBINHOOD MKTS INC770700102COM287,615$41,180,777dollars as filed
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock87,908$40,085,849dollars as filed
RADNET INC750491102COM525,820$40,072,742dollars as filed
MKS INC. COM55306N104Stock323,364$40,022,762dollars as filed
HUNT J B TRANS SVCS INC COM445658107Stock296,843$39,827,478dollars as filed
KYNDRYL HLDGS INC50155Q100COMMON STOCK1,315,656$39,509,150dollars as filed
TOASTINCCLASSCLASSA888787108STOK1,034,305$37,762,476dollars as filed
ASTERA LABS INC COM04626A103COM192,614$37,713,821dollars as filed
FORMFACTOR INC COM346375108Stock1,026,657$37,390,848dollars as filed
CORE SCIENTIFIC INC NEW21874A106COM1,992,735$35,749,666dollars as filed
TARGA RES CORP COM87612G101Stock182,426$30,563,618dollars as filed
THE BALDWIN INSURANCE GRP IN05589G102COM CL A1,071,136$30,216,747dollars as filed
SPX TECHNOLOGIES INC78473E103COM145,699$27,213,659dollars as filed
RIOT PLATFORMS INC767292105COM1,350,027$25,691,014dollars as filed
BICYCLE THERAPEUTICS PLC-ADR088786108SPONSORED ADS2,952,543$22,852,683dollars as filed
IONQ INC COM46222L108Stock367,667$22,611,521dollars as filed
CHECK POINT SOFTWARE TECH LTD ORDM22465104Stock99,472$20,581,752dollars as filed
NXP SEMICONDUCTORS N V COMN6596X109Stock89,996$20,494,789dollars as filed
SUPER MICRO COMPUTER INC86800U302COM NEW359,439$17,231,492dollars as filed
PATTERN GROUP INC70339W104COM SER A1,135,879$15,561,542dollars as filed
MUELLER INDS INC COM624756102Stock127,835$12,925,397dollars as filed
WILLIAMS COS INC COM969457100Stock201,065$12,737,468dollars as filed
Alphabet Inc. Reg. Shares C02079K107COM40,663$9,903,474dollars as filed
Coca-Cola Company191216100COM135,745$9,002,608dollars as filed
CINTAS CORP COM172908105Stock43,259$8,879,342dollars as filed
MITSUBISHI UFJ FINANCIAL GROUP SPONSORED ADS606822104ADR517,229$8,244,630dollars as filed
SUMITOMO MITSUI FIN GRP INC86562M209SPONSORED ADR459,467$7,691,478dollars as filed
Wells Fargo & Company949746101COM88,176$7,390,912dollars as filed
TJX Companies Inc872540109COM49,961$7,221,363dollars as filed
AMERIPRISE FINL INC COM03076C106Stock14,691$7,216,954dollars as filed
RAYMOND JAMES FINL INC COM754730109Stock40,095$6,920,397dollars as filed
TRANE TECHNOLOGIES PLC SHSG8994E103Stock15,916$6,715,915dollars as filed
Walmart Inc.931142103COM64,902$6,688,800dollars as filed
Thermo Fisher Scientific Inc.883556102COM13,681$6,635,559dollars as filed
M & T BK CORP COM55261F104Stock30,525$6,032,351dollars as filed
ROLLINS INC COM775711104Stock100,660$5,912,768dollars as filed
Medtronic PlcG5960L103COM61,922$5,897,451dollars as filed
STAG INDUSTRIAL INC85254J102COM166,199$5,865,163dollars as filed
WELLTOWER INC COM95040Q104REIT32,189$5,734,148dollars as filed
FIRST CTZNS BANCSHARES INC DEL CL A31946M103Stock3,185$5,698,475dollars as filed
Goldman Sachs Group,Inc.38141G104COM7,128$5,676,383dollars as filed
HERSHEY CO COM427866108Stock29,288$5,478,320dollars as filed
PARKER-HANNIFIN CORP COM701094104Stock7,172$5,437,452dollars as filed
NextEra Energy,Inc.65339F101COM70,506$5,322,498dollars as filed
CARDINAL HEALTH INC14149Y108COM33,769$5,300,382dollars as filed
F5 INC COM315616102Stock16,220$5,242,142dollars as filed
MCKESSON CORP COM58155Q103Stock6,732$5,200,739dollars as filed
CME Group Inc. Class A12572Q105COM18,841$5,090,650dollars as filed
CIENA CORP COM NEW171779309Stock31,750$4,625,023dollars as filed
KROGER CO COM501044101Stock63,932$4,309,656dollars as filed
Waste Management, Inc.94106L109COM18,777$4,146,525dollars as filed
GARTNERINC366651107STOK14,375$3,778,729dollars as filed
EXPEDIA GROUP INC COM NEW30212P303Stock16,799$3,590,786dollars as filed
Home Depot, Inc437076102COM6,017$2,438,028dollars as filed
RANPAK HOLDINGS CORP75321W103COMMON STOCK407,328$2,289,183dollars as filed
MAPLEBEAR INC COM565394103Stock51,381$1,888,766dollars as filed
AbbVie,Inc.00287Y109COM7,928$1,835,649dollars as filed
Berkshire Hathaway Inc084670702COM2,350$1,181,439dollars as filed
Booking Holdings Inc.09857L108COM210$1,133,847dollars as filed
Danaher Corporation235851102COM4,953$981,982dollars as filed
International Business Machines Corporation459200101COM3,320$936,771dollars as filed
APPLOVIN CORP COM CL A03831W108Stock1,284$922,618dollars as filed
PLEXUS CORP COM729132100Stock5,200$752,388dollars as filed
Boston Scientific Corporation101137107COM7,592$741,207dollars as filed
MERCADOLIBREINC58733R102STOK313$731,462dollars as filed
iShares Silver Trust46428Q109COM16,760$710,121dollars as filed
COMERICAINC200340107COM8,560$586,531dollars as filed
EQT CORP COM26884L109Stock10,640$579,135dollars as filed
GE HEALTHCARE TECHNOLOGIES INC COMMON STOCK36266G107Stock4,322$324,611dollars as filed
UNIQURE NVN90064101SHS3,828$223,440dollars as filed
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF1,441$205,237dollars as filed
IONIS PHARMACEUTICALS INC COM462222100Stock3,093$202,344dollars as filed

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001177719-25-000003this filing2025-11-12acceptance time not in the bulk data set