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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 2025-03-31, filed 2025-05-09, with 244 holding rows worth $20,549,795,430.

Accession
0001085146-25-002864
Filed
2025-05-09
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2025

A holdings report, 244 entries on the cover page, a total value of $20,549,795,430 stated on the cover page (in dollars after the unit check, H1), rows summing to $20,549,795,430 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
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR5,479,259$853,997,354dollars as filed
NVIDIA Corp67066G104COM7,336,654$795,146,517dollars as filed
Apple Inc037833100COM3,401,183$755,504,793dollars as filed
Microsoft Corp594918104COM1,832,611$687,944,002dollars as filed
Amazon.com, Inc023135106COM3,462,676$658,808,796dollars as filed
Alphabet Inc. Reg. Shares A02079K305COM3,459,916$535,041,341dollars as filed
META PLATFORMS INC CL A30303M102COM898,538$517,881,469dollars as filed
AXONENTERPRISEINC05464C101STOK927,801$487,976,732dollars as filed
TRANSDIGM GROUP INC COM893641100Stock316,162$437,343,361dollars as filed
Visa Inc92826C839COM904,397$316,954,828dollars as filed
COMFORT SYS USA INC COM199908104Stock889,639$286,757,339dollars as filed
LPL FINL HLDGS INC COM50212V100Stock830,099$271,558,617dollars as filed
ServiceNow,Inc.81762P102COM320,284$254,991,209dollars as filed
TAPESTRY INC COM876030107Stock3,601,314$253,568,509dollars as filed
LEGEND BIOTECH CORP52490G102SPONSORED ADS6,917,567$234,713,042dollars as filed
Broadcom Inc.11135F101COM1,398,303$234,117,929dollars as filed
Eli Lilly and Company532457108COM258,952$213,871,325dollars as filed
FTAI AVIATION LTD SHSG3730V105Stock1,892,451$210,118,835dollars as filed
Salesforce.com, Inc79466L302COM782,929$210,106,873dollars as filed
Progressive Corporation743315103COM712,249$201,573,717dollars as filed
Netflix, Inc64110L106COM213,903$199,471,284dollars as filed
CHECK POINT SOFTWARE TECH LTD ORDM22465104Stock864,717$197,086,293dollars as filed
VERTIV HOLDINGS CO COM CL A92537N108Stock2,377,572$171,660,668dollars as filed
CASELLA WASTE SYS INC147448104CL A1,507,843$168,139,573dollars as filed
DEXCOM INC COM252131107Stock2,447,743$167,156,364dollars as filed
ARES MANAGEMENT CORPORATION CL A COM STK03990B101Stock1,128,415$165,436,898dollars as filed
MONDAY COM LTD SHSM7S64H106Stock665,164$161,741,337dollars as filed
Palantir Technologies Inc. Class A69608A108COM1,898,437$160,228,067dollars as filed
GE Vernova Inc.36828A101COM512,767$156,537,407dollars as filed
ATLASSIANCORPCLASSA049468101STOK736,388$156,268,938dollars as filed
LANTHEUS HLDGS INC516544103COM1,589,145$155,100,552dollars as filed
BRINKER INTL INC COM109641100Stock995,713$148,411,023dollars as filed
HOWMET AEROSPACE INC COM443201108Stock1,135,059$147,251,209dollars as filed
OPTION CARE HEALTH INC COM NEW68404L201Stock4,144,537$144,851,568dollars as filed
INSULET CORP COM45784P101Stock538,247$141,349,160dollars as filed
DRAFTKINGS INC NEW26142V105COM CL A4,225,024$140,313,035dollars as filed
Costco Wholesale Corporation22160K105COM148,156$140,122,511dollars as filed
Bank of America Corp060505104COM3,344,496$139,565,812dollars as filed
DYNATRACE INC COM NEW268150109Stock2,910,553$137,232,574dollars as filed
SAMSARA INC COM CL A79589L106Stock3,523,390$135,051,547dollars as filed
SAIA INC78709Y105COM373,503$130,513,153dollars as filed
MONGODB INC CL A60937P106Stock733,787$128,706,298dollars as filed
DICKS SPORTING GOODS INC COM253393102Stock630,566$127,096,786dollars as filed
PROCORE TECHNOLOGIES INC COM74275K108Stock1,879,226$124,066,501dollars as filed
UnitedHealth Group Inc91324P102COM236,174$123,696,158dollars as filed
Tesla Motors, Inc88160R101COM474,720$123,028,556dollars as filed
TEXAS ROADHOUSE INC COM882681109Stock702,048$116,982,258dollars as filed
REGAL REXNORD CORPORATION758750103COM1,001,177$113,984,001dollars as filed
INTERNATIONAL PAPER CO COM460146103Stock2,117,805$112,984,897dollars as filed
GALLAGHER ARTHUR J & CO COM363576109Stock324,635$112,077,146dollars as filed
MASIMO CORP COM574795100Stock671,479$111,868,445dollars as filed
BLUE OWL CAPITAL INC COM CL A09581B103Stock5,553,781$111,297,771dollars as filed
TAIWAN SEMICONDUCTOR MFG874039100SPONSORED ADS655,367$108,790,894dollars as filed
INSMED INC COM PAR $.01457669307Stock1,406,609$107,310,201dollars as filed
GLAUKOS CORP COM377322102Stock1,084,184$106,705,389dollars as filed
SHARKNINJA INC COM SHSG8068L108Stock1,229,784$102,576,268dollars as filed
Union Pacific Corporation907818108COM426,665$100,795,274dollars as filed
MSCI INC COM55354G100Stock175,636$99,322,020dollars as filed
NATERA INC COM632307104Stock691,341$97,762,562dollars as filed
Oracle Corporation68389X105COM698,726$97,688,945dollars as filed
SHIFT4 PMTS INC CL A82452J109Stock1,186,149$96,920,235dollars as filed
GLOBANT S AL44385109COM820,445$96,582,814dollars as filed
HUBSPOTINC443573100STOK166,657$95,209,369dollars as filed
FLEX LTD ORDY2573F102Stock2,873,012$95,039,242dollars as filed
TRADEWEB MKTS INC CL A892672106Stock630,032$93,534,551dollars as filed
KYNDRYL HLDGS INC50155Q100COMMON STOCK2,911,964$91,435,670dollars as filed
FAIR ISAAC CORP COM303250104Stock48,827$90,044,264dollars as filed
SOLENO THERAPEUTICS INC834203309COM1,211,245$86,543,455dollars as filed
PALOMAR HLDGS INC COM69753M105Stock618,598$84,797,414dollars as filed
ITT INC COM45073V108Stock635,419$82,070,718dollars as filed
VAXCYTE INC COM92243G108Stock2,155,137$81,377,973dollars as filed
IDEX CORP COM45167R104Stock445,203$80,568,387dollars as filed
CENCORA INC COM03073E105Stock288,969$80,359,349dollars as filed
TWILIO INC CL A90138F102Stock818,964$80,184,765dollars as filed
KEMPER CORP COM488401100Stock1,192,664$79,729,588dollars as filed
RYAN SPECIALTY HOLDINGS INC CL A78351F107Stock1,078,233$79,649,072dollars as filed
APPLOVIN CORP COM CL A03831W108Stock297,188$78,746,011dollars as filed
ROKU INC COM CL A77543R102Stock1,117,739$78,733,535dollars as filed
PRIMERICA INC74164M108COM276,225$78,594,299dollars as filed
WILLSCOT HLDGS CORP971378104COM CL A2,803,085$77,925,763dollars as filed
S&P Global,Inc.78409V104COM151,399$76,926,032dollars as filed
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock595,338$75,631,740dollars as filed
EAST WEST BANCORP INC COM27579R104Stock817,306$73,361,387dollars as filed
MACOM TECH SOLUTIONS HLDGS INC COM55405Y100Stock721,904$72,464,716dollars as filed
BIRKENSTOCK HOLDING PLCM2029K104COM SHS1,572,685$72,107,607dollars as filed
SPROUTS FMRS MKT INC COM85208M102Stock469,725$71,698,824dollars as filed
RHYTHM PHARMACEUTICALS INC76243J105COM1,341,092$71,037,643dollars as filed
PERMIAN RESOURCES CORP CLASS A COM71424F105Stock5,085,292$70,431,294dollars as filed
AVERY DENNISON CORP COM053611109Stock394,064$70,131,570dollars as filed
AMETEK INC COM031100100Stock406,878$70,040,021dollars as filed
EVERPURE INC CL A74624M102Stock1,557,874$68,967,091dollars as filed
TRANSUNION COM89400J107Stock830,028$68,884,024dollars as filed
HUNT J B TRANS SVCS INC COM445658107Stock457,555$67,695,230dollars as filed
APOLLO GLOBAL MGMT INC COM03769M106Stock493,602$67,593,887dollars as filed
WASTE CONNECTIONS INC COM94106B101Stock342,037$66,762,175dollars as filed
NU HLDGS LTDG6683N103ORD SHS CL A6,501,928$66,579,740dollars as filed
DESCARTES SYS GROUP INC COM249906108Stock652,431$65,784,618dollars as filed
BADGER METER INC COM056525108Stock344,010$65,447,903dollars as filed
FABRINET SHSG3323L100Stock327,137$64,612,829dollars as filed
IRHYTHM HOLDINGS INC COM450056106Stock617,078$64,595,725dollars as filed
DATADOGINCCLASSA23804L103STOK640,549$63,548,852dollars as filed
ICON PUB LTD CO SHSG4705A100Stock361,912$63,331,045dollars as filed
MERUS N VN5749R100COM1,501,220$63,186,350dollars as filed
OKTAINCCLASSA679295105STOK578,946$60,916,698dollars as filed
SENTINELONE INC81730H109CL A3,286,406$59,746,861dollars as filed
WIX COM LTD SHSM98068105Stock364,332$59,524,562dollars as filed
VULCAN MATLS CO COM929160109Stock254,781$59,440,316dollars as filed
RED ROCK RESORTS INC75700L108CL A1,360,609$59,009,612dollars as filed
ROBINHOOD MKTS INC770700102COM1,415,103$58,896,606dollars as filed
HILTON WORLDWIDE HLDGS INC COM43300A203Stock251,474$57,222,852dollars as filed
ROCKWELL AUTOMATION INC COM773903109Stock219,860$56,807,401dollars as filed
AXALTA COATING SYS LTD COMG0750C108Stock1,712,448$56,801,900dollars as filed
RAMBUS INC DEL COM750917106Stock1,089,081$56,387,169dollars as filed
COPART INC COM217204106Stock991,920$56,132,751dollars as filed
MOONLAKE IMMUNOTHERAPEUTICS CLASS A ORD61559X104Stock1,434,770$56,056,464dollars as filed
DIAMONDBACK ENERGY INC COM25278X109Stock344,596$55,094,061dollars as filed
AVIENT CORPORATION05368V106COM1,475,318$54,822,817dollars as filed
BRAZE INC10576N102COM CL A1,514,513$54,643,629dollars as filed
MUELLER WTR PRODS INC COM SER A624758108Stock2,118,561$53,853,821dollars as filed
Lam Research Corporation512807306COM736,520$53,544,976dollars as filed
CYTOKINETICS INC23282W605COM NEW1,310,336$52,662,404dollars as filed
NEXTPOWER INC CLASS A COM65290E101Stock1,243,151$52,386,383dollars as filed
GE HEALTHCARE TECHNOLOGIES INC COMMON STOCK36266G107Stock644,607$52,026,231dollars as filed
ALNYLAM PHARMACEUTICALS INC COM02043Q107Stock192,172$51,890,393dollars as filed
WNS HLDGS LTD COM SHSG98196101Stock840,983$51,712,045dollars as filed
CSX Corporation126408103COM1,753,021$51,591,418dollars as filed
HEALTHEQUITY INC COM42226A107Stock563,389$49,786,686dollars as filed
COINBASE GLOBAL INC COM CL A19260Q107Stock288,763$49,733,623dollars as filed
NORTHERN OIL & GAS INC COM665531307Stock1,636,938$49,484,636dollars as filed
MAPLEBEAR INC COM565394103Stock1,219,320$48,638,675dollars as filed
THE BALDWIN INSURANCE GRP IN05589G102COM CL A1,076,847$48,124,292dollars as filed
KEYCORP COM493267108Stock2,968,535$47,466,875dollars as filed
TERADYNE INC COM880770102Stock574,467$47,451,014dollars as filed
MCCORMICK & CO INC COM NON VTG579780206Stock571,698$47,056,490dollars as filed
TECHNIPFMC PLC COMG87110105Stock1,483,510$47,012,432dollars as filed
APPLIED INDL TECHNOLOGIES INC COM03820C105Stock208,136$46,901,366dollars as filed
WINTRUST FINL CORP COM97650W108Stock415,498$46,726,905dollars as filed
XENON PHARMACEUTICALS INC COM98420N105Stock1,391,370$46,680,463dollars as filed
ROCKET LAB USA INC773122106COM2,586,532$46,247,192dollars as filed
HOULIHAN LOKEY INC CL A441593100Stock286,288$46,235,512dollars as filed
TALEN ENERGY CORP COM87422Q109Stock229,674$45,859,008dollars as filed
SEMTECH CORP COM816850101Stock1,322,351$45,488,874dollars as filed
LINCOLN ELEC HLDGS INC533900106COM236,086$44,658,028dollars as filed
PROCEPT BIOROBOTICS CORP COM74276L105Stock748,557$43,610,931dollars as filed
LIVE NATION ENTERTAINMENT INC COM538034109Stock322,451$42,105,646dollars as filed
FLUOR CORP343412102COM1,142,294$40,916,971dollars as filed
SPOTIFYTECHNOLOGYSAFL8681T102STOK74,210$40,817,721dollars as filed
BIO-TECHNE CORP09073M104COM676,408$39,657,801dollars as filed
CHAMPIONX CORPORATION15872M104COM1,310,725$39,059,605dollars as filed
VISTRA CORP COM92840M102Stock332,342$39,030,244dollars as filed
THETRADEDESKINCCLASSCLASSA88339J105STOK712,098$38,966,021dollars as filed
CHURCHILL DOWNS INC171484108COM346,452$38,480,424dollars as filed
MOOG INC CL A615394202Stock217,368$37,680,743dollars as filed
REVOLUTION MEDICINES INC COM76155X100Stock1,064,046$37,624,667dollars as filed
SILICON LABORATORIES INC COM826919102Stock330,897$37,249,075dollars as filed
CROWDSTRIKE HLDGS INC22788C105COM105,130$37,066,769dollars as filed
ABERCROMBIE & FITCH CO CL A002896207Stock479,651$36,630,947dollars as filed
WESTERN DIGITAL CORP958102105COM875,743$35,406,285dollars as filed
CERIDIAN HCM HLDG INC15677J108COM587,439$34,265,314dollars as filed
BIO RAD LABS INC090572207CL A134,671$32,800,469dollars as filed
ROCKET PHARMACEUTICALS INC77313F106COM4,820,701$32,154,076dollars as filed
89BIO INC282559103COM3,894,741$28,314,767dollars as filed
ASTERA LABS INC COM04626A103COM467,080$27,870,664dollars as filed
FORMFACTOR INC COM346375108Stock913,330$25,838,106dollars as filed
COHERENT CORP COM19247G107Stock395,504$25,684,031dollars as filed
KINSALECAPGROUPINC49714P108STOK51,624$25,125,917dollars as filed
ONTO INNOVATION INC COM683344105Stock203,566$24,700,698dollars as filed
CREDO TECHNOLOGY GROUP HOLDING ORDINARY SHARESG25457105Stock605,805$24,329,129dollars as filed
BICYCLE THERAPEUTICS PLC-ADR088786108SPONSORED ADS2,657,305$22,560,519dollars as filed
GENIUS SPORTS LIMITED SHARES CL AG3934V109Stock2,178,257$21,804,353dollars as filed
VEECO INSTRS INC DEL COM922417100Stock1,059,504$21,274,840dollars as filed
PRIMORIS SVCS CORP COM74164F103Stock362,729$20,824,272dollars as filed
GENEDX HOLDINGS CORP81663L200COM CL A222,477$19,703,676dollars as filed
EXTREME NETWORKS INC30226D106COM1,371,749$18,148,239dollars as filed
SPX TECHNOLOGIES INC78473E103COM128,615$16,563,040dollars as filed
ARISTA NETWORKS INC040413205COM196,534$15,227,454dollars as filed
MARA HOLDINGS INC COM565788106Stock1,287,869$14,810,494dollars as filed
MUELLER INDS INC COM624756102Stock168,424$12,823,803dollars as filed
Coca-Cola Company191216100COM178,810$12,806,372dollars as filed
URANIUM ENERGY CORP COM916896103Stock2,606,954$12,461,240dollars as filed
CELESTICA INC COM15101Q207Stock154,406$12,168,737dollars as filed
CINTAS CORP COM172908105Stock56,903$11,695,274dollars as filed
RIOT PLATFORMS INC767292105COM1,635,177$11,642,460dollars as filed
WILLIAMS COS INC COM969457100Stock177,064$10,581,345dollars as filed
Alphabet Inc. Reg. Shares C02079K107COM62,285$9,730,786dollars as filed
AMERIPRISE FINL INC COM03076C106Stock19,397$9,390,282dollars as filed
STAG INDUSTRIAL INC85254J102COM250,875$9,061,605dollars as filed
Procter & Gamble Co742718109COM53,118$9,052,370dollars as filed
WILEY JOHN & SONS INC968223206CL A186,014$8,288,784dollars as filed
Pfizer Inc.717081103COM315,697$7,999,762dollars as filed
TJX Companies Inc872540109COM64,939$7,909,570dollars as filed
ALLEGRO MICROSYSTEMS INC01749D105COM303,672$7,631,277dollars as filed
TOASTINCCLASSCLASSA888787108STOK229,968$7,628,039dollars as filed
TRACTOR SUPPLY CO COM892356106Stock136,377$7,514,373dollars as filed
Medtronic PlcG5960L103COM80,415$7,226,092dollars as filed
Thermo Fisher Scientific Inc.883556102COM14,335$7,133,096dollars as filed
M & T BK CORP COM55261F104Stock39,657$7,088,689dollars as filed
NextEra Energy,Inc.65339F101COM98,747$7,000,175dollars as filed
CUMMINS INC COM231021106Stock21,762$6,821,081dollars as filed
EQUINIX INC COM29444U700REIT7,607$6,202,367dollars as filed
Walmart Inc.931142103COM69,966$6,142,315dollars as filed
GARTNERINC366651107STOK14,370$6,031,664dollars as filed
FIDELITY NATL INFORMATION SVCS COM31620M106Stock79,940$5,969,919dollars as filed
COSTAR GROUP INC COM22160N109Stock75,081$5,948,668dollars as filed
FIRST CTZNS BANCSHARES INC DEL CL A31946M103Stock3,186$5,907,595dollars as filed
Accenture Plc Class AG1151C101COM18,581$5,798,015dollars as filed
WILLIAMS SONOMA INC COM969904101Stock35,723$5,647,806dollars as filed
GENPACT LIMITED SHSG3922B107Stock111,368$5,610,720dollars as filed
RAYMOND JAMES FINL INC COM754730109Stock40,095$5,569,596dollars as filed
SANOFI SA SPONSORED ADR80105N105ADR97,814$5,424,764dollars as filed
BOYDGAMINGCORP103304101STOK80,958$5,329,465dollars as filed
ROBERT HALF INC. COM770323103Stock92,084$5,023,182dollars as filed
ROLLINS INC COM775711104Stock92,834$5,015,821dollars as filed
MARRIOTT INTL INC NEW CL A571903202Stock19,777$4,710,881dollars as filed
GLOBAL PMTS INC37940X102COM43,566$4,265,983dollars as filed
HEICO CORP NEW422806208CL A20,130$4,246,826dollars as filed
F5 INC COM315616102Stock14,770$3,932,808dollars as filed
PAYLOCITY HLDG CORP COM70438V106Stock18,840$3,529,486dollars as filed
Danaher Corporation235851102COM15,810$3,241,050dollars as filed
AMERICAN INTL GROUP INC COM NEW026874784Stock36,560$3,178,526dollars as filed
Home Depot, Inc437076102COM6,978$2,557,367dollars as filed
ILLINOIS TOOL WKS INC452308109COM9,808$2,432,482dollars as filed
RANPAK HOLDINGS CORP75321W103COMMON STOCK407,328$2,207,718dollars as filed
CIENA CORP COM NEW171779309Stock31,750$1,918,653dollars as filed
Intuitive Surgical,Inc.46120E602COM2,339$1,158,437dollars as filed
NXP SEMICONDUCTORS N V COMN6596X109Stock5,948$1,130,442dollars as filed
Booking Holdings Inc.09857L108COM210$967,451dollars as filed
Intuit Inc.461202103COM1,410$865,726dollars as filed
International Business Machines Corporation459200101COM3,320$825,551dollars as filed
Applied Materials,Inc.038222105COM5,159$748,674dollars as filed
PLEXUS CORP COM729132100Stock5,200$666,276dollars as filed
MERCADOLIBREINC58733R102STOK313$610,622dollars as filed
CARDINAL HEALTH INC14149Y108COM4,325$595,855dollars as filed
EQT CORP COM26884L109Stock10,640$568,495dollars as filed
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,671$562,993dollars as filed
iShares Silver Trust46428Q109COM16,760$519,392dollars as filed
Boston Scientific Corporation101137107COM5,025$506,922dollars as filed
COMERICAINC200340107COM8,560$505,554dollars as filed
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF3,914$459,869dollars as filed
ISHARESRUSSELL1000GROWTHETF464287614STOK1,192$430,425dollars as filed
FISERV INC337738108COM1,650$364,370dollars as filed
LENZ THERAPEUTICS INC52635N103COM10,159$261,188dollars as filed
PTC THERAPEUTICS INC69366J200COM5,076$258,673dollars as filed
LIGHTSPEED COMM INC NPV53229C107SUB VTG SHS21,665$189,569dollars as filed

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-25-002864this filing2025-05-09acceptance time not in the bulk data set