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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 2025-06-30, filed 2025-08-12, with 239 holding rows worth $23,843,766,396.

Accession
0001085146-25-004820
Filed
2025-08-12
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q2 2025

A holdings report, 239 entries on the cover page, a total value of $23,843,766,396 stated on the cover page (in dollars after the unit check, H1), rows summing to $23,843,766,396 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 Corp67066G104COM7,545,345$1,192,088,997dollars as filed
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR5,451,401$940,911,882dollars as filed
Microsoft Corp594918104COM1,757,424$874,160,432dollars as filed
Apple Inc037833100COM3,494,184$716,901,778dollars as filed
Amazon.com, Inc023135106COM3,100,452$680,208,241dollars as filed
AXONENTERPRISEINC05464C101STOK790,079$654,138,292dollars as filed
META PLATFORMS INC CL A30303M102COM858,402$633,577,596dollars as filed
COMFORT SYS USA INC COM199908104Stock936,412$502,113,479dollars as filed
Alphabet Inc. Reg. Shares A02079K305COM2,571,637$453,199,576dollars as filed
TRANSDIGM GROUP INC COM893641100Stock290,013$441,005,066dollars as filed
Broadcom Inc.11135F101COM1,336,142$368,307,525dollars as filed
HOWMET AEROSPACE INC COM443201108Stock1,915,955$356,616,739dollars as filed
VERTIV HOLDINGS CO COM CL A92537N108Stock2,637,409$338,669,733dollars as filed
Netflix, Inc64110L106COM251,923$337,357,047dollars as filed
ServiceNow,Inc.81762P102COM298,276$306,651,970dollars as filed
TAPESTRY INC COM876030107Stock3,419,245$300,243,907dollars as filed
LPL FINL HLDGS INC COM50212V100Stock782,232$293,313,384dollars as filed
Visa Inc92826C839COM796,463$282,784,203dollars as filed
Eli Lilly and Company532457108COM307,493$239,699,644dollars as filed
LEGEND BIOTECH CORP52490G102SPONSORED ADS6,472,547$229,710,688dollars as filed
BRINKER INTL INC COM109641100Stock1,236,583$222,993,012dollars as filed
FTAI AVIATION LTD SHSG3730V105Stock1,915,411$220,348,881dollars as filed
DEXCOM INC COM252131107Stock2,380,238$207,770,942dollars as filed
MONDAY COM LTD SHSM7S64H106Stock646,320$203,254,651dollars as filed
Bank of America Corp060505104COM4,217,760$199,584,401dollars as filed
MASIMO CORP COM574795100Stock1,181,203$198,702,016dollars as filed
FABRINET SHSG3323L100Stock663,310$195,464,203dollars as filed
ARES MANAGEMENT CORPORATION CL A COM STK03990B101Stock1,078,769$186,842,824dollars as filed
CASELLA WASTE SYS INC147448104CL A1,552,307$179,105,182dollars as filed
Salesforce.com, Inc79466L302COM647,474$176,559,788dollars as filed
GE Vernova Inc.36828A101COM325,288$172,126,365dollars as filed
DYNATRACE INC COM NEW268150109Stock2,951,726$162,964,792dollars as filed
CHECK POINT SOFTWARE TECH LTD ORDM22465104Stock678,958$150,219,430dollars as filed
BADGER METER INC COM056525108Stock612,809$150,107,565dollars as filed
Oracle Corporation68389X105COM678,940$148,436,546dollars as filed
Costco Wholesale Corporation22160K105COM144,626$143,170,902dollars as filed
AUTOZONE INC COM053332102Stock38,182$141,739,816dollars as filed
SAMSARA INC COM CL A79589L106Stock3,549,106$141,183,450dollars as filed
Tesla Motors, Inc88160R101COM438,413$139,266,272dollars as filed
SHARKNINJA INC COM SHSG8068L108Stock1,404,751$139,056,316dollars as filed
INSMED INC COM PAR $.01457669307Stock1,339,288$134,785,944dollars as filed
HEALTHEQUITY INC COM42226A107Stock1,265,208$132,543,190dollars as filed
TEXAS ROADHOUSE INC COM882681109Stock705,622$132,240,619dollars as filed
TAIWAN SEMICONDUCTOR MFG874039100SPONSORED ADS580,313$131,435,012dollars as filed
Applied Materials,Inc.038222105COM694,431$127,129,472dollars as filed
REGAL REXNORD CORPORATION758750103COM870,131$126,134,190dollars as filed
SEMTECH CORP COM816850101Stock2,747,260$124,011,316dollars as filed
LANTHEUS HLDGS INC516544103COM1,495,072$122,386,594dollars as filed
GLAUKOS CORP COM377322102Stock1,167,853$120,627,536dollars as filed
Progressive Corporation743315103COM450,331$120,175,258dollars as filed
ROBLOX CORP CL A771049103Stock1,141,073$120,040,875dollars as filed
SOLENO THERAPEUTICS INC834203309COM1,429,756$119,784,958dollars as filed
DRAFTKINGS INC NEW26142V105COM CL A2,643,325$113,372,222dollars as filed
NATERA INC COM632307104Stock669,889$113,171,063dollars as filed
ROYAL CARIBBEAN GROUP COMV7780T103Stock352,525$110,389,697dollars as filed
INTERNATIONAL PAPER CO COM460146103Stock2,323,693$108,818,543dollars as filed
APOLLO GLOBAL MGMT INC COM03769M106Stock761,721$108,065,334dollars as filed
MERUS N VN5749R100COM2,042,388$107,429,609dollars as filed
ROLLINS INC COM775711104Stock1,878,134$105,964,320dollars as filed
ITT INC COM45073V108Stock657,250$103,076,518dollars as filed
RHYTHM PHARMACEUTICALS INC76243J105COM1,629,468$102,966,083dollars as filed
PROCORE TECHNOLOGIES INC COM74275K108Stock1,504,787$102,957,527dollars as filed
GALLAGHER ARTHUR J & CO COM363576109Stock321,606$102,952,407dollars as filed
LIVE NATION ENTERTAINMENT INC COM538034109Stock677,730$102,527,011dollars as filed
MACOM TECH SOLUTIONS HLDGS INC COM55405Y100Stock709,433$101,654,653dollars as filed
VISTRA CORP COM92840M102Stock519,286$100,642,867dollars as filed
TWILIO INC CL A90138F102Stock806,789$100,332,280dollars as filed
GLOBANT S AL44385109COM1,100,526$99,971,771dollars as filed
VAXCYTE INC COM92243G108Stock3,068,898$99,769,874dollars as filed
KYNDRYL HLDGS INC50155Q100COMMON STOCK2,375,354$99,669,854dollars as filed
OPTION CARE HEALTH INC COM NEW68404L201Stock3,061,474$99,436,676dollars as filed
BLUE OWL CAPITAL INC COM CL A09581B103Stock5,152,460$98,978,757dollars as filed
ROKU INC COM CL A77543R102Stock1,097,707$96,477,468dollars as filed
HEICO CORP NEW422806208CL A361,062$93,424,793dollars as filed
Union Pacific Corporation907818108COM400,295$92,099,898dollars as filed
PROCEPT BIOROBOTICS CORP COM74276L105Stock1,598,349$92,064,902dollars as filed
DOORDASH INC CL A25809K105Stock368,152$90,753,196dollars as filed
CLOUDFLARE INC CL A COM18915M107Stock448,696$87,868,163dollars as filed
RYAN SPECIALTY HOLDINGS INC CL A78351F107Stock1,279,815$87,014,622dollars as filed
GARTNERINC366651107STOK212,927$86,069,360dollars as filed
ROCKETLABCORPCLASSCLASSA773121108STOK2,365,048$84,597,767dollars as filed
KEMPER CORP COM488401100Stock1,310,206$84,560,695dollars as filed
SNOWFLAKE INC COM SHS833445109Stock373,623$83,605,539dollars as filed
MSCI INC COM55354G100Stock144,360$83,258,246dollars as filed
BIRKENSTOCK HOLDING PLCM2029K104COM SHS1,676,950$82,472,401dollars as filed
KEYCORP COM493267108Stock4,678,788$81,504,487dollars as filed
TRANSUNION COM89400J107Stock922,286$81,161,168dollars as filed
Intercontinental Exchange,Inc.45866F104COM440,726$80,860,069dollars as filed
CENCORA INC COM03073E105Stock268,752$80,585,155dollars as filed
SPROUTS FMRS MKT INC COM85208M102Stock478,370$78,758,837dollars as filed
WILLSCOT HLDGS CORP971378104COM CL A2,861,031$78,392,249dollars as filed
FAIR ISAAC CORP COM303250104Stock42,304$77,330,484dollars as filed
IDEX CORP COM45167R104Stock438,664$77,016,238dollars as filed
UnitedHealth Group Inc91324P102COM230,033$71,763,286dollars as filed
NEXTPOWER INC CLASS A COM65290E101Stock1,317,564$71,635,955dollars as filed
AMETEK INC COM031100100Stock395,416$71,554,529dollars as filed
ROCKWELL AUTOMATION INC COM773903109Stock214,680$71,310,408dollars as filed
PINTEREST INC CL A72352L106Stock1,986,093$71,221,295dollars as filed
TOASTINCCLASSCLASSA888787108STOK1,602,654$70,981,546dollars as filed
HUBSPOTINC443573100STOK125,407$69,805,374dollars as filed
RED ROCK RESORTS INC75700L108CL A1,339,886$69,714,269dollars as filed
COHERENT CORP COM19247G107Stock774,235$69,069,518dollars as filed
PRIMERICA INC74164M108COM250,151$68,458,824dollars as filed
MONGODB INC CL A60937P106Stock325,233$68,295,576dollars as filed
SPOTIFYTECHNOLOGYSAFL8681T102STOK88,931$68,240,639dollars as filed
MAPLEBEAR INC COM565394103Stock1,482,228$67,055,995dollars as filed
SHIFT4 PMTS INC CL A82452J109Stock676,228$67,020,957dollars as filed
INSULET CORP COM45784P101Stock212,749$66,841,343dollars as filed
DESCARTES SYS GROUP INC COM249906108Stock649,631$66,031,743dollars as filed
TRADEWEB MKTS INC CL A892672106Stock447,615$65,530,836dollars as filed
HILTON WORLDWIDE HLDGS INC COM43300A203Stock245,371$65,352,132dollars as filed
VEEVA SYS INC CL A COM922475108Stock226,569$65,247,363dollars as filed
VULCAN MATLS CO COM929160109Stock248,683$64,861,587dollars as filed
QUANTA SVCS INC74762E102COM170,057$64,295,327dollars as filed
PALOMAR HLDGS INC COM69753M105Stock407,936$62,924,128dollars as filed
WASTE CONNECTIONS INC COM94106B101Stock335,019$62,554,682dollars as filed
HOULIHAN LOKEY INC CL A441593100Stock345,524$62,177,044dollars as filed
RAMBUS INC DEL COM750917106Stock962,419$61,614,064dollars as filed
WIX COM LTD SHSM98068105Stock385,952$61,157,954dollars as filed
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock186,905$60,947,949dollars as filed
REVOLUTION MEDICINES INC COM76155X100Stock1,649,404$60,681,573dollars as filed
EVERPURE INC CL A74624M102Stock1,033,724$59,521,837dollars as filed
MOONLAKE IMMUNOTHERAPEUTICS CLASS A ORD61559X104Stock1,259,376$59,442,547dollars as filed
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock471,627$58,288,381dollars as filed
COMMVAULT SYS INC COM204166102Stock333,753$58,183,160dollars as filed
OKTAINCCLASSA679295105STOK570,323$57,015,190dollars as filed
KINSALECAPGROUPINC49714P108STOK117,394$56,806,957dollars as filed
SYNOPSYS INC COM871607107Stock108,571$55,662,020dollars as filed
OREILLY AUTOMOTIVE INC COM67103H107Stock612,389$55,194,658dollars as filed
WESTERN DIGITAL CORP958102105COM862,236$55,174,477dollars as filed
WINTRUST FINL CORP COM97650W108Stock440,858$54,657,575dollars as filed
CSX Corporation126408103COM1,673,055$54,591,793dollars as filed
GENEDX HOLDINGS CORP81663L200COM CL A589,188$54,387,944dollars as filed
TALEN ENERGY CORP COM87422Q109Stock186,558$54,245,470dollars as filed
AXALTA COATING SYS LTD COMG0750C108Stock1,808,608$53,697,572dollars as filed
FIFTH THIRD BANCORP COM316773100Stock1,279,918$52,643,042dollars as filed
THE BALDWIN INSURANCE GRP IN05589G102COM CL A1,225,948$52,482,834dollars as filed
MUELLER WTR PRODS INC COM SER A624758108Stock2,166,945$52,093,358dollars as filed
APPLIED INDL TECHNOLOGIES INC COM03820C105Stock220,640$51,287,768dollars as filed
VERONA PHARMA PLC925050106SPONSORED ADS539,813$51,055,514dollars as filed
PRIMORIS SVCS CORP COM74164F103Stock654,223$50,990,141dollars as filed
TECHNIPFMC PLC COMG87110105Stock1,475,941$50,831,408dollars as filed
AVIENT CORPORATION05368V106COM1,560,102$50,406,896dollars as filed
ICON PUB LTD CO SHSG4705A100Stock345,828$50,300,705dollars as filed
BURLINGTON STORES INC COM122017106Stock213,644$49,702,061dollars as filed
NORTHERN OIL & GAS INC COM665531307Stock1,740,304$49,337,618dollars as filed
CREDO TECHNOLOGY GROUP HOLDING ORDINARY SHARESG25457105Stock528,378$48,922,519dollars as filed
LINCOLN ELEC HLDGS INC533900106COM233,123$48,331,060dollars as filed
AFFIRM HLDGS INC COM CL A00827B106Stock698,779$48,313,580dollars as filed
EAST WEST BANCORP INC COM27579R104Stock471,928$47,655,289dollars as filed
COPART INC COM217204106Stock967,903$47,494,981dollars as filed
XPO INC COM983793100Stock375,621$47,437,176dollars as filed
SAIA INC78709Y105COM173,095$47,426,299dollars as filed
GE HEALTHCARE TECHNOLOGIES INC COMMON STOCK36266G107Stock631,183$46,751,744dollars as filed
DIAMONDBACK ENERGY INC COM25278X109Stock336,693$46,261,624dollars as filed
PERMIAN RESOURCES CORP CLASS A COM71424F105Stock3,348,130$45,601,531dollars as filed
BRAZE INC10576N102COM CL A1,600,304$44,968,542dollars as filed
HUNT J B TRANS SVCS INC COM445658107Stock312,949$44,939,446dollars as filed
IRHYTHM HOLDINGS INC COM450056106Stock290,570$44,736,157dollars as filed
CLEAN HARBORS INC COM184496107Stock192,259$44,446,436dollars as filed
ENTEGRIS INC COM29362U104Stock545,688$44,009,737dollars as filed
MCCORMICK & CO INC COM NON VTG579780206Stock556,692$42,208,384dollars as filed
FLUOR CORP343412102COM818,396$41,959,163dollars as filed
ABERCROMBIE & FITCH CO CL A002896207Stock505,574$41,886,806dollars as filed
ATLASSIANCORPCLASSA049468101STOK205,968$41,830,074dollars as filed
CELESTICA INC COM15101Q207Stock256,447$40,033,941dollars as filed
INTAPP INC45827U109COM748,884$38,657,392dollars as filed
XENON PHARMACEUTICALS INC COM98420N105Stock1,152,605$36,076,537dollars as filed
ALKAMI TECHNOLOGY INC01644J108COM1,190,584$35,884,202dollars as filed
ROBINHOOD MKTS INC770700102COM382,981$35,858,512dollars as filed
ONTO INNOVATION INC COM683344105Stock351,064$35,432,890dollars as filed
CORE SCIENTIFIC INC NEW21874A106COM1,982,653$33,843,887dollars as filed
BIO RAD LABS INC090572207CL A139,505$33,665,347dollars as filed
GENIUS SPORTS LIMITED SHARES CL AG3934V109Stock3,202,135$33,302,204dollars as filed
TARGA RES CORP COM87612G101Stock191,069$33,261,302dollars as filed
89BIO INC282559103COM3,370,817$33,101,423dollars as filed
IONQ INC COM46222L108Stock671,627$28,859,812dollars as filed
SPX TECHNOLOGIES INC78473E103COM137,019$22,975,346dollars as filed
AVERY DENNISON CORP COM053611109Stock113,903$19,986,559dollars as filed
RIOT PLATFORMS INC767292105COM1,730,296$19,552,345dollars as filed
BICYCLE THERAPEUTICS PLC-ADR088786108SPONSORED ADS2,780,491$19,324,412dollars as filed
STRIDE INC86333M108COM126,656$18,389,185dollars as filed
CALIX INC13100M509COM291,149$15,486,215dollars as filed
MUELLER INDS INC COM624756102Stock151,701$12,055,678dollars as filed
CINTAS CORP COM172908105Stock51,358$11,446,157dollars as filed
Coca-Cola Company191216100COM161,050$11,394,288dollars as filed
WILLIAMS COS INC COM969457100Stock177,318$11,137,344dollars as filed
Alphabet Inc. Reg. Shares C02079K107COM56,758$10,068,302dollars as filed
AMERIPRISE FINL INC COM03076C106Stock17,476$9,327,465dollars as filed
STAG INDUSTRIAL INC85254J102COM235,683$8,550,579dollars as filed
MITSUBISHI UFJ FINANCIAL GROUP SPONSORED ADS606822104ADR609,995$8,369,131dollars as filed
SUMITOMO MITSUI FIN GRP INC86562M209SPONSORED ADR541,882$8,187,837dollars as filed
Procter & Gamble Co742718109COM48,627$7,747,254dollars as filed
WILEY JOHN & SONS INC968223206CL A169,768$7,576,746dollars as filed
TJX Companies Inc872540109COM59,349$7,329,008dollars as filed
M & T BK CORP COM55261F104Stock36,424$7,065,892dollars as filed
Medtronic PlcG5960L103COM73,815$6,434,454dollars as filed
Walmart Inc.931142103COM64,066$6,264,373dollars as filed
FIRST CTZNS BANCSHARES INC DEL CL A31946M103Stock3,185$6,231,357dollars as filed
RAYMOND JAMES FINL INC COM754730109Stock40,095$6,149,370dollars as filed
NextEra Energy,Inc.65339F101COM88,087$6,115,000dollars as filed
COSTAR GROUP INC COM22160N109Stock74,545$5,993,418dollars as filed
FIDELITY NATL INFORMATION SVCS COM31620M106Stock73,340$5,970,609dollars as filed
MCKESSON CORP COM58155Q103Stock8,011$5,870,301dollars as filed
EQUINIX INC COM29444U700REIT7,007$5,573,858dollars as filed
Thermo Fisher Scientific Inc.883556102COM13,626$5,524,798dollars as filed
McDonalds Corporation580135101COM18,155$5,304,346dollars as filed
GENPACT LIMITED SHSG3922B107Stock102,176$4,496,766dollars as filed
F5 INC COM315616102Stock14,770$4,347,106dollars as filed
SANOFI SA SPONSORED ADR80105N105ADR86,114$4,160,167dollars as filed
Wells Fargo & Company949746101COM51,482$4,124,738dollars as filed
GLOBAL PMTS INC37940X102COM43,566$3,487,023dollars as filed
PAYLOCITY HLDG CORP COM70438V106Stock18,840$3,413,620dollars as filed
Danaher Corporation235851102COM16,110$3,182,369dollars as filed
CIENA CORP COM NEW171779309Stock31,750$2,582,228dollars as filed
AMERICAN INTL GROUP INC COM NEW026874784Stock25,843$2,211,902dollars as filed
ILLINOIS TOOL WKS INC452308109COM8,882$2,196,075dollars as filed
Home Depot, Inc437076102COM5,666$2,077,382dollars as filed
RANPAK HOLDINGS CORP75321W103COMMON STOCK407,328$1,454,161dollars as filed
Booking Holdings Inc.09857L108COM210$1,215,740dollars as filed
Berkshire Hathaway Inc084670702COM2,350$1,141,560dollars as filed
Intuit Inc.461202103COM1,410$1,110,558dollars as filed
International Business Machines Corporation459200101COM3,320$978,670dollars as filed
Palantir Technologies Inc. Class A69608A108COM7,026$957,733dollars as filed
MERCADOLIBREINC58733R102STOK313$818,066dollars as filed
CARIS LIFE SCIENCES INC142152107COMMON STOCK30,000$801,600dollars as filed
PLEXUS CORP COM729132100Stock5,200$703,612dollars as filed
Intuitive Surgical,Inc.46120E602COM1,280$695,565dollars as filed
EQT CORP COM26884L109Stock10,640$620,525dollars as filed
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,354$592,253dollars as filed
iShares Silver Trust46428Q109COM16,760$549,896dollars as filed
COMERICAINC200340107COM8,560$510,604dollars as filed
BIO-TECHNE CORP09073M104COM9,570$492,377dollars as filed
APPLOVIN CORP COM CL A03831W108Stock1,284$449,509dollars as filed
NOVO-NORDISK A S ADR670100205ADR5,995$413,775dollars as filed
Boston Scientific Corporation101137107COM3,669$394,087dollars as filed
IONIS PHARMACEUTICALS INC COM462222100Stock9,561$377,755dollars as filed
MEDPACE HLDGS INC COM58506Q109Stock703$220,644dollars as filed
AVANTOR INC COM05352A100Stock15,348$206,584dollars as filed

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-25-004820this filing2025-08-12acceptance time not in the bulk data set