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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 2024-03-31, filed 2024-05-10, with 244 holding rows worth $19,047,708,538.

Accession
0001085146-24-002397
Filed
2024-05-10
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2024

A holdings report, 244 entries on the cover page, a total value of $19,047,708,538 stated on the cover page (in dollars after the unit check, H1), rows summing to $19,047,708,538 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
Microsoft Corp594918104COM1,522,930$640,726,963dollars as filed
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR4,075,214$616,050,091dollars as filed
Apple Inc037833100COM3,237,247$555,123,085dollars as filed
NVIDIA Corp67066G104COM599,967$542,105,984dollars as filed
Amazon.com, Inc023135106COM2,633,433$475,018,570dollars as filed
Alphabet Inc. Reg. Shares A02079K305COM2,956,626$446,243,521dollars as filed
TRANSDIGM GROUP INC COM893641100Stock315,374$388,415,162dollars as filed
META PLATFORMS INC CL A30303M102COM702,584$341,160,645dollars as filed
BUILDERS FIRSTSOURCE INC COM12008R107Stock1,381,284$288,066,870dollars as filed
Visa Inc92826C839COM1,019,994$284,659,924dollars as filed
VERTIV HOLDINGS CO COM CL A92537N108Stock3,399,272$277,618,511dollars as filed
AXONENTERPRISEINC05464C101STOK709,306$221,927,507dollars as filed
ServiceNow,Inc.81762P102COM281,388$214,530,178dollars as filed
DEXCOM INC COM252131107Stock1,539,461$213,523,274dollars as filed
COMFORT SYS USA INC COM199908104Stock667,036$211,924,008dollars as filed
UnitedHealth Group Inc91324P102COM426,637$211,057,365dollars as filed
ICON PUB LTD CO SHSG4705A100Stock536,883$180,365,676dollars as filed
Salesforce.com, Inc79466L302COM590,564$177,866,048dollars as filed
AMETEK INC COM031100100Stock953,603$174,414,030dollars as filed
OPTION CARE HEALTH INC COM NEW68404L201Stock5,171,385$173,448,253dollars as filed
M/I HOMES INC55305B101COM1,219,989$166,272,301dollars as filed
LINCOLN ELEC HLDGS INC533900106COM646,442$165,127,144dollars as filed
AbbVie,Inc.00287Y109COM887,179$161,555,299dollars as filed
COSTAR GROUP INC COM22160N109Stock1,647,389$159,137,822dollars as filed
SAIA INC78709Y105COM259,082$151,562,970dollars as filed
NICE LTD SPONSORED ADR653656108ADR571,436$148,927,718dollars as filed
Home Depot, Inc437076102COM374,807$143,775,880dollars as filed
Uber Technologies90353T100COM1,767,673$136,093,156dollars as filed
AVANTOR INC COM05352A100Stock5,244,215$134,094,569dollars as filed
WILLSCOT HLDGS CORP971378104COM CL A2,752,063$127,970,930dollars as filed
Progressive Corporation743315103COM617,410$127,692,823dollars as filed
LEGEND BIOTECH CORP52490G102SPONSORED ADS2,239,774$125,628,902dollars as filed
COPART INC COM217204106Stock2,167,032$125,514,485dollars as filed
Costco Wholesale Corporation22160K105COM169,256$124,002,220dollars as filed
LANTHEUS HLDGS INC516544103COM1,958,018$121,867,040dollars as filed
HUBSPOTINC443573100STOK194,437$121,826,409dollars as filed
FLYWIRE CORPORATION302492103COM VTG4,837,491$120,018,152dollars as filed
TAIWAN SEMICONDUCTOR MFG874039100SPONSORED ADS854,438$116,246,324dollars as filed
CONSTELLATION BRANDS INC CL A21036P108Stock427,161$116,085,189dollars as filed
INSPIRE MED SYS INC COM457730109Stock538,294$115,620,168dollars as filed
GLOBAL PMTS INC37940X102COM863,745$115,448,151dollars as filed
CADENCE DESIGN SYSTEM INC COM127387108Stock370,675$115,383,737dollars as filed
WINGSTOP INC COM974155103Stock314,818$115,349,315dollars as filed
TEXAS ROADHOUSE INC COM882681109Stock740,719$114,418,864dollars as filed
MGM RESORTS INTERNATIONAL552953101COM2,362,356$111,526,824dollars as filed
VAXCYTE INC COM92243G108Stock1,586,095$108,346,149dollars as filed
ROCKET PHARMACEUTICALS INC77313F106COM3,984,030$107,329,768dollars as filed
AMERICAN INTL GROUP INC COM NEW026874784Stock1,366,011$106,781,075dollars as filed
CHIPOTLEMEXICANGRILLI169656105STOK36,567$106,292,989dollars as filed
ROSS STORES INC COM778296103Stock721,370$105,868,260dollars as filed
Union Pacific Corporation907818108COM422,492$103,903,535dollars as filed
LPL FINL HLDGS INC COM50212V100Stock385,227$101,776,973dollars as filed
MASIMO CORP COM574795100Stock686,100$100,753,791dollars as filed
AVERY DENNISON CORP COM053611109Stock450,289$100,527,019dollars as filed
APOLLO GLOBAL MGMT INC COM03769M106Stock886,761$99,716,256dollars as filed
ITT INC COM45073V108Stock723,617$98,433,621dollars as filed
F5 INC COM315616102Stock515,507$97,734,972dollars as filed
FAIR ISAAC CORP COM303250104Stock77,370$96,681,737dollars as filed
WORKDAY INC CL A98138H101Stock352,536$96,154,169dollars as filed
MONDAY COM LTD SHSM7S64H106Stock415,584$93,867,958dollars as filed
HUBBELL INC COM443510607Stock225,547$93,613,282dollars as filed
IDEXX LABS INC COM45168D104Stock172,021$92,879,402dollars as filed
NXP SEMICONDUCTORS N V COMN6596X109Stock374,539$92,799,476dollars as filed
SMARTSHEET INC. (CLASS A)83200N103COM CL A2,386,272$91,871,472dollars as filed
DRAFTKINGS INC NEW26142V105COM CL A2,007,587$91,164,541dollars as filed
DYNATRACE INC COM NEW268150109Stock1,923,414$89,323,346dollars as filed
CELANESE CORP DEL COM150870103Stock519,641$89,305,469dollars as filed
ROCKWELL AUTOMATION INC COM773903109Stock304,384$88,676,224dollars as filed
PTC INC COM69370C100Stock467,231$88,278,625dollars as filed
SHIFT4 PMTS INC CL A82452J109Stock1,333,252$88,087,960dollars as filed
IDEX CORP COM45167R104Stock359,880$87,817,918dollars as filed
ARES MANAGEMENT CORPORATION CL A COM STK03990B101Stock649,344$86,349,786dollars as filed
MERITAGE HOMES CORP COM59001A102Stock490,660$86,091,204dollars as filed
HUNT J B TRANS SVCS INC COM445658107Stock431,427$85,961,919dollars as filed
CDW CORP COM12514G108Stock334,332$85,515,352dollars as filed
BLUE OWL CAPITAL INC COM CL A09581B103Stock4,529,065$85,418,166dollars as filed
VULCAN MATLS CO COM929160109Stock311,381$84,982,049dollars as filed
MSCI INC COM55354G100Stock150,518$84,357,736dollars as filed
SAMSARA INC COM CL A79589L106Stock2,228,759$84,224,803dollars as filed
Cisco Systems,Inc.17275R102COM1,686,503$84,173,373dollars as filed
CASELLA WASTE SYS INC147448104CL A848,012$83,842,946dollars as filed
MKS INC. COM55306N104Stock620,063$82,468,326dollars as filed
HILTON WORLDWIDE HLDGS INC COM43300A203Stock379,064$80,858,094dollars as filed
INSULET CORP COM45784P101Stock468,320$80,269,962dollars as filed
PERMIAN RESOURCES CORP CLASS A COM71424F105Stock4,541,934$80,210,554dollars as filed
BIO RAD LABS INC090572207CL A230,509$79,726,148dollars as filed
MONGODB INC CL A60937P106Stock221,858$79,567,217dollars as filed
RED ROCK RESORTS INC75700L108CL A1,328,200$79,452,924dollars as filed
COOPER COS INC216648501COM776,971$78,831,478dollars as filed
SUN CMNTYS INC COM866674104REIT604,004$77,662,834dollars as filed
INSIGHT ENTERPRISES INC45765U103COM405,407$75,211,107dollars as filed
AZEK CO INC05478C105CL A1,487,700$74,712,294dollars as filed
HEXCEL CORP NEW428291108COM1,018,276$74,181,407dollars as filed
GALLAGHER ARTHUR J & CO COM363576109Stock291,382$72,857,173dollars as filed
PROCORE TECHNOLOGIES INC COM74275K108Stock880,442$72,345,885dollars as filed
OVINTIV INC69047Q102COM1,385,002$71,881,604dollars as filed
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock631,590$71,597,042dollars as filed
ZSCALERINC98980G102STOK368,283$70,942,356dollars as filed
NORTHERN OIL & GAS INC COM665531307Stock1,749,749$69,430,040dollars as filed
NEUROCRINE BIOSCIENCES INC64125C109COM503,193$69,400,379dollars as filed
Walmart Inc.931142103COM1,147,368$69,037,129dollars as filed
DIAMONDBACK ENERGY INC COM25278X109Stock345,635$68,494,491dollars as filed
COHERENT CORP COM19247G107Stock1,129,777$68,487,082dollars as filed
FIVE BELOW INC COM33829M101Stock373,679$67,777,897dollars as filed
Charles Schwab Corp808513105COM930,154$67,287,370dollars as filed
ON HLDG AG NAMEN AKT AH5919C104Stock1,862,570$65,897,727dollars as filed
CERIDIAN HCM HLDG INC15677J108COM994,711$65,859,797dollars as filed
AXALTA COATING SYS LTD COMG0750C108Stock1,880,702$64,677,342dollars as filed
ALIGN TECHNOLOGY INC COM016255101Stock196,141$64,318,577dollars as filed
WASTE CONNECTIONS INC COM94106B101Stock370,042$63,650,896dollars as filed
DATADOGINCCLASSA23804L103STOK499,579$61,747,904dollars as filed
WEX INC96208T104COM258,384$61,373,952dollars as filed
STRATEGY INC CL A NEW594972408Stock35,723$60,891,997dollars as filed
HAEMONETICS CORP MASS COM405024100Stock699,861$59,733,136dollars as filed
GE HEALTHCARE TECHNOLOGIES INC COMMON STOCK36266G107Stock655,639$59,604,162dollars as filed
WNS HLDGS LTD COM SHSG98196101Stock1,170,420$59,141,323dollars as filed
AVIENT CORPORATION05368V106COM1,359,671$59,009,721dollars as filed
SAP SE SPON ADR803054204ADR302,188$58,935,783dollars as filed
IRHYTHM HOLDINGS INC COM450056106Stock502,678$58,310,648dollars as filed
PRIMERICA INC74164M108COM228,650$57,839,304dollars as filed
EQUINIX INC COM29444U700REIT69,419$57,293,577dollars as filed
FABRINET SHSG3323L100Stock300,421$56,785,577dollars as filed
SUPER MICRO COMPUTER INC86800U104COM55,653$56,211,200dollars as filed
Advanced Micro Devices,Inc.007903107COM310,103$55,970,567dollars as filed
KINSALECAPGROUPINC49714P108STOK106,301$55,780,387dollars as filed
SELECTIVE INS GROUP INC816300107COM508,085$55,467,639dollars as filed
REGAL REXNORD CORPORATION758750103COM302,532$54,486,013dollars as filed
VIKING THERAPEUTICS INC92686J106COM662,131$54,294,742dollars as filed
S&P Global,Inc.78409V104COM127,192$54,113,752dollars as filed
CHURCHILL DOWNS INC171484108COM423,521$52,410,724dollars as filed
ZEBRA TECHNOLOGIES CORPORATION CL A989207105Stock172,805$52,090,372dollars as filed
FLEX LTD ORDY2573F102Stock1,801,579$51,543,175dollars as filed
CYTOKINETICS INC23282W605COM NEW731,386$51,277,472dollars as filed
Tesla Motors, Inc88160R101COM291,060$51,165,508dollars as filed
GENPACT LIMITED SHSG3922B107Stock1,539,160$50,715,322dollars as filed
TAPESTRY INC COM876030107Stock1,041,976$49,473,020dollars as filed
GITLAB INC CLASS A COM37637K108Stock843,548$49,195,719dollars as filed
TRADEWEB MKTS INC CL A892672106Stock463,365$48,268,732dollars as filed
IMPINJ INC453204109COM375,646$48,236,703dollars as filed
DECKERS OUTDOOR CORP243537107COM50,634$47,659,759dollars as filed
DESCARTES SYS GROUP INC COM249906108Stock518,744$47,480,638dollars as filed
PATTERSON-UTI ENERGY INC703481101COM3,884,494$46,380,858dollars as filed
PAYLOCITY HLDG CORP COM70438V106Stock267,830$46,029,264dollars as filed
DEVON ENERGY CORP NEW COM25179M103Stock913,847$45,856,831dollars as filed
MOONLAKE IMMUNOTHERAPEUTICS CLASS A ORD61559X104Stock910,873$45,753,151dollars as filed
SENSATA TECHNOLOGIES HLDG PLg8060n102SHS1,233,437$45,316,475dollars as filed
FIRST CTZNS BANCSHARES INC DEL CL A31946M103Stock27,713$45,311,556dollars as filed
NEXTPOWER INC CLASS A COM65290E101Stock802,489$45,156,056dollars as filed
SBA COMMUNICATIONS CORP CL A78410G104REIT207,489$44,962,796dollars as filed
MARQETA INC57142B104CLASS A COM7,418,851$44,216,352dollars as filed
LIVE NATION ENTERTAINMENT INC COM538034109Stock413,794$43,766,939dollars as filed
WESTERN DIGITAL CORP958102105COM640,806$43,728,573dollars as filed
REPLIGEN CORP COM759916109Stock235,310$43,278,215dollars as filed
EAST WEST BANCORP INC COM27579R104Stock543,067$42,962,030dollars as filed
KEYCORP COM493267108Stock2,710,757$42,857,068dollars as filed
MACOM TECH SOLUTIONS HLDGS INC COM55405Y100Stock441,270$42,203,063dollars as filed
TENABLE HLDGS INC88025T102COM828,215$40,938,667dollars as filed
PALO ALTO NETWORKS INC697435105COM142,571$40,508,700dollars as filed
JABIL INC COM466313103Stock291,456$39,040,475dollars as filed
NOVA LTD COMM7516K103Stock217,954$38,660,681dollars as filed
HALLIBURTON CO COM406216101Stock946,426$37,308,097dollars as filed
APTIV PLCG6095L109SHS467,416$37,229,695dollars as filed
STAG INDUSTRIAL INC85254J102COM967,485$37,190,123dollars as filed
ENPHASE ENERGY INC COM29355A107Stock304,647$36,856,242dollars as filed
CCC INTELLIGENT SOLUTIONS HLD COM12510Q100Stock3,070,975$36,728,861dollars as filed
PALOMAR HLDGS INC COM69753M105Stock437,412$36,668,248dollars as filed
REXFORD INDL RLTY INC COM76169C100REIT727,744$36,605,523dollars as filed
PLEXUS CORP COM729132100Stock384,248$36,434,395dollars as filed
CHAMPIONX CORPORATION15872M104COM1,009,418$36,228,012dollars as filed
LIGHTSPEED COMM INC NPV53229C107SUB VTG SHS2,488,179$34,983,797dollars as filed
LULULEMON ATHLETICA INC550021109COM89,074$34,796,814dollars as filed
ALKERMES PLCG01767105SHS1,282,741$34,723,799dollars as filed
EXPEDIA GROUP INC COM NEW30212P303Stock249,290$34,339,724dollars as filed
REVOLVE GROUP INC CL A76156B107Stock1,593,530$33,735,030dollars as filed
WINTRUST FINL CORP COM97650W108Stock313,937$32,771,883dollars as filed
INNOVIVA INC45781M101COM2,111,663$32,181,744dollars as filed
Broadcom Inc.11135F101COM24,137$31,991,421dollars as filed
SILICON MOTION TECHNOLOGY CORP SPONSORED ADR82706C108ADR374,303$28,798,873dollars as filed
BICYCLE THERAPEUTICS PLC-ADR088786108SPONSORED ADS1,038,917$25,869,033dollars as filed
89BIO INC282559103COM2,164,147$25,190,671dollars as filed
Eli Lilly and Company532457108COM28,325$22,035,717dollars as filed
UNIVERSAL DISPLAY CORP91347P105COM122,772$20,680,943dollars as filed
RAMBUS INC DEL COM750917106Stock328,053$20,276,956dollars as filed
CALIX INC13100M509COM584,576$19,384,540dollars as filed
CAMTEK LTD ORDM20791105Stock214,296$17,951,576dollars as filed
CREDO TECHNOLOGY GROUP HOLDING ORDINARY SHARESG25457105Stock842,226$17,846,769dollars as filed
International Business Machines Corporation459200101COM87,218$16,655,149dollars as filed
XENON PHARMACEUTICALS INC COM98420N105Stock347,351$14,953,461dollars as filed
SYNAPTICS INC COM87157D109Stock133,916$13,064,845dollars as filed
ICHOR HOLDINGSG4740B105SHS335,867$12,971,184dollars as filed
Merck & Co.,Inc.58933Y105COM93,816$12,379,021dollars as filed
WILLIAMS SONOMA INC COM969904101Stock37,700$11,970,881dollars as filed
MICROCHIP TECHNOLOGY INC. COM595017104Stock130,197$11,679,973dollars as filed
Coca-Cola Company191216100COM179,354$10,972,878dollars as filed
Thermo Fisher Scientific Inc.883556102COM17,634$10,249,057dollars as filed
Alphabet Inc. Reg. Shares C02079K107COM65,207$9,928,418dollars as filed
CINTAS CORP COM172908105Stock14,277$9,808,727dollars as filed
WATSCO INC COM942622200Stock21,082$9,106,792dollars as filed
MUELLER INDS INC COM624756102Stock168,849$9,106,027dollars as filed
Bank of America Corp060505104COM229,588$8,705,977dollars as filed
AMERIPRISE FINL INC COM03076C106Stock19,376$8,495,213dollars as filed
LENNAR CORP CL A526057104Stock48,534$8,346,877dollars as filed
MURAL ONCOLOGY PUB LTD COG63365103ORD SHS1,548,418$7,571,763dollars as filed
HERSHEY CO COM427866108Stock38,215$7,432,818dollars as filed
TRACTOR SUPPLY CO COM892356106Stock27,364$7,161,706dollars as filed
Chevron Corporation166764100COM45,387$7,159,345dollars as filed
Pfizer Inc.717081103COM254,290$7,056,548dollars as filed
WILEY JOHN & SONS INC968223206CL A184,955$7,052,334dollars as filed
GARTNERINC366651107STOK14,370$6,849,748dollars as filed
RESTAURANT BRANDS INTL INC COM76131D103Stock83,421$6,627,798dollars as filed
TJX Companies Inc872540109COM65,133$6,605,789dollars as filed
FERGUSON PLC NEWG3421J106SHS28,966$6,327,043dollars as filed
EQUITY LIFESTYLE PROPERTIES COM29472R108REIT97,687$6,291,043dollars as filed
COGENT COMMUNICATIONS GROUP19239V302COM NEW94,471$6,171,790dollars as filed
ConocoPhillips20825C104COM46,234$5,884,664dollars as filed
NextEra Energy,Inc.65339F101COM89,841$5,741,738dollars as filed
CME Group Inc. Class A12572Q105COM25,793$5,552,975dollars as filed
CUMMINS INC COM231021106Stock17,796$5,243,591dollars as filed
Danaher Corporation235851102COM20,785$5,190,430dollars as filed
RAYMOND JAMES FINL INC COM754730109Stock40,095$5,149,000dollars as filed
CARDINAL HEALTH INC14149Y108COM45,285$5,067,392dollars as filed
FIDELITY NATL INFORMATION SVCS COM31620M106Stock65,450$4,855,081dollars as filed
TIMKEN CO887389104COM47,820$4,180,903dollars as filed
METTLER TOLEDO INTERNATIONAL COM592688105Stock2,624$3,493,305dollars as filed
ILLINOIS TOOL WKS INC452308109COM11,883$3,188,565dollars as filed
RANPAK HOLDINGS CORP75321W103COMMON STOCK404,370$3,182,392dollars as filed
HEICO CORP NEW422806208CL A20,130$3,098,812dollars as filed
MARVELL TECHNOLOGY INC573874104COM28,946$2,051,671dollars as filed
Applied Materials,Inc.038222105COM6,518$1,344,207dollars as filed
EMCOR GROUP INC COM29084Q100Stock3,540$1,239,708dollars as filed
CSX Corporation126408103COM28,590$1,059,831dollars as filed
TRANE TECHNOLOGIES PLC SHSG8994E103Stock3,154$946,831dollars as filed
Intuit Inc.461202103COM1,410$916,500dollars as filed
WILLIAMS COS INC COM969457100Stock23,330$909,170dollars as filed
AAON INC000360206COM PAR $0.0049,630$848,403dollars as filed
Booking Holdings Inc.09857L108COM210$761,855dollars as filed
CAMECO CORP COM13321L108Stock13,550$586,986dollars as filed
TERRENO RLTY CORP88146M101COM8,840$586,976dollars as filed
OLD DOMINION FREIGHT LINE INC COM679580100Stock2,498$547,836dollars as filed
NANO DIMENSION LTD63008G203SPONSORD ADS NEW149,070$415,160dollars as filed
MEDIAALPHA INC58450V104CL A17,850$363,605dollars as filed
BLOCK INC CL A852234103Stock4,280$362,002dollars as filed
NATIONAL STORAGE AFFILIATES TR COM SHS BEN IN637870106REIT7,860$307,798dollars as filed
HUMANA INC COM444859102Stock847$293,672dollars as filed

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-24-002397this filing2024-05-10acceptance time not in the bulk data set