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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 2021-03-31, filed 2021-05-14, with 243 holding rows worth $16,089,955,000.

Accession
0001085146-21-001659
Filed
2021-05-14
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q1 2021

A holdings report, 243 entries on the cover page, a total value of $16,089,955,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $16,089,955,000 with VALUE read as thousands by filing date, 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
Apple Inc037833100COM4,605,664$562,582,000thousands by filing date
Amazon.com, Inc023135106COM160,867$497,735,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM198,625$409,668,000thousands by filing date
Microsoft Corp594918104COM1,733,236$408,645,000thousands by filing date
META PLATFORMS INC CL A30303M102COM1,038,082$305,746,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock1,502,334$295,013,000thousands by filing date
ZENDESK INC98936J101COM2,179,679$289,069,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR1,867,693$240,708,000thousands by filing date
Visa Inc92826C839COM1,114,335$235,938,000thousands by filing date
BIO RAD LABS INC090572207CL A404,467$231,019,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock376,213$221,183,000thousands by filing date
DARDEN RESTAURANTS INC COM237194105Stock1,334,426$189,488,000thousands by filing date
ServiceNow,Inc.81762P102COM368,376$184,229,000thousands by filing date
AMETEK INC COM031100100Stock1,382,329$176,565,000thousands by filing date
ADVANCED DRAIN SYS INC DEL COM00790R104Stock1,705,181$176,299,000thousands by filing date
Salesforce.com, Inc79466L302COM826,578$175,127,000thousands by filing date
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,033,389$171,088,000thousands by filing date
WORKDAY INC CL A98138H101Stock684,223$169,982,000thousands by filing date
FORTINET INC COM34959E109Stock892,412$164,579,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM360,530$164,539,000thousands by filing date
Union Pacific Corporation907818108COM722,382$159,220,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK634,813$154,158,000thousands by filing date
AbbVie,Inc.00287Y109COM1,397,294$151,215,000thousands by filing date
INSULET CORP COM45784P101Stock579,278$151,145,000thousands by filing date
HUMANA INC COM444859102Stock354,778$148,741,000thousands by filing date
TREX CO INC89531P105COM1,610,393$147,415,000thousands by filing date
CELANESE CORP DEL COM150870103Stock979,949$146,806,000thousands by filing date
GLOBAL PMTS INC37940X102COM719,431$145,023,000thousands by filing date
NIKE,Inc. Class B654106103COM1,017,975$135,279,000thousands by filing date
HUBSPOTINC443573100STOK295,908$134,404,000thousands by filing date
NVIDIA Corp67066G104COM248,743$132,811,000thousands by filing date
NATIONAL VISION HLDGS INC COM63845R107Stock2,981,152$130,664,000thousands by filing date
Morgan Stanley617446448COM1,666,712$129,437,000thousands by filing date
Broadcom Inc.11135F101COM271,691$125,972,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock296,321$122,573,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock847,913$120,539,000thousands by filing date
TOPBUILD COR COM89055F103Stock569,530$119,277,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock102,885$118,903,000thousands by filing date
Boston Scientific Corporation101137107COM3,071,619$118,718,000thousands by filing date
STERIS PLC SHS USDG8473T100Stock621,633$118,409,000thousands by filing date
Costco Wholesale Corporation22160K105COM335,867$118,386,000thousands by filing date
HEXCEL CORP NEW428291108COM2,065,638$115,676,000thousands by filing date
ZYNGA INC.98986T108CL A11,327,978$115,659,000thousands by filing date
ACCELERON PHARMA INC00434H108COM839,273$113,814,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock787,507$110,731,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM1,128,487$109,723,000thousands by filing date
ETSY INC29786A106COM538,762$108,652,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR486,714$106,089,000thousands by filing date
Applied Materials,Inc.038222105COM793,577$106,022,000thousands by filing date
BRP INC COM SUN VTG05577W200Stock1,216,762$105,761,000thousands by filing date
IDEX CORP COM45167R104Stock504,042$105,506,000thousands by filing date
IDEXX LABS INC COM45168D104Stock210,254$102,879,000thousands by filing date
FIVE BELOW INC COM33829M101Stock537,885$102,623,000thousands by filing date
Cisco Systems,Inc.17275R102COM1,980,806$102,427,000thousands by filing date
TRANSUNION COM89400J107Stock1,076,795$96,912,000thousands by filing date
DEXCOM INC COM252131107Stock263,950$94,861,000thousands by filing date
CHIPOTLEMEXICANGRILLI169656105STOK66,540$94,541,000thousands by filing date
NCR VOYIX CORPORATION62886E108COM2,429,209$92,188,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM2,080,104$90,776,000thousands by filing date
TARGET CORP COM87612E106Stock454,898$90,102,000thousands by filing date
Intuit Inc.461202103COM235,113$90,062,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock329,793$87,540,000thousands by filing date
TWILIO INC CL A90138F102Stock254,378$86,682,000thousands by filing date
WEX INC96208T104COM412,828$86,372,000thousands by filing date
SILICON MOTION TECHNOLOGY CORP SPONSORED ADR82706C108ADR1,452,093$86,240,000thousands by filing date
SYNCHRONYFINL87165B103STOK2,032,878$82,657,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM659,519$81,081,000thousands by filing date
ATKORE INC047649108COMMON STOCK1,124,287$80,836,000thousands by filing date
AMERICAN FINANCIAL GROUP INC COM025932104Stock707,935$80,775,000thousands by filing date
AZEK CO INC05478C105CL A1,848,236$77,718,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock500,016$77,612,000thousands by filing date
ROSS STORES INC COM778296103Stock640,586$76,813,000thousands by filing date
ESSEX PPTY TR INC COM297178105REIT281,492$76,521,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM262,657$76,126,000thousands by filing date
ROCKET PHARMACEUTICALS INC77313F106COM1,663,652$73,816,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW191,642$73,608,000thousands by filing date
MSCI INC COM55354G100Stock175,380$73,533,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM272,367$73,166,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock577,238$72,022,000thousands by filing date
SEAGEN INC81181C104COM518,488$71,997,000thousands by filing date
TAPESTRY INC COM876030107Stock1,731,905$71,372,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock772,655$70,582,000thousands by filing date
ATLASSIAN CORPG06242104CL A334,864$70,576,000thousands by filing date
ALIGN TECHNOLOGY INC COM016255101Stock126,165$68,322,000thousands by filing date
CATALENT INC USD 0.01148806102COM645,875$68,017,000thousands by filing date
Tesla Motors, Inc88160R101COM99,691$66,587,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock79,077$64,993,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock209,485$64,766,000thousands by filing date
SENSATA TECHNOLOGIES HLDG PLg8060n102SHS1,114,044$64,559,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock502,873$64,539,000thousands by filing date
DISCOVERY INC25470F104COM SER A1,481,051$64,366,000thousands by filing date
WILLIAMS SONOMA INC COM969904101Stock358,802$64,297,000thousands by filing date
LYFT INC55087P104CL A COM1,003,050$63,373,000thousands by filing date
ITT INC COM45073V108Stock670,922$60,994,000thousands by filing date
FMC CORP COM NEW302491303Stock550,118$60,849,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK5,383,650$60,189,000thousands by filing date
MKS INC. COM55306N104Stock324,457$60,161,000thousands by filing date
SPIRIT RLTY CAP INC NEW NPV84860W300COM NEW1,414,934$60,135,000thousands by filing date
DOUGLAS EMMETT INC25960P109COM1,912,787$60,062,000thousands by filing date
MGM RESORTS INTERNATIONAL552953101COM1,578,051$59,950,000thousands by filing date
HORIZON THERAPEUTICS PLCG46188101SHS650,064$59,832,000thousands by filing date
LIVE NATION ENTERTAINMENT INC COM538034109Stock704,079$59,600,000thousands by filing date
TIMKEN CO887389104COM734,228$59,597,000thousands by filing date
XILINX INC983919101COM477,378$59,147,000thousands by filing date
LIGHTSPEED POS INC53227R106SUB VTG SHS934,043$58,667,000thousands by filing date
FIRST CTZNS BANCSHARES INC DEL CL A31946M103Stock69,787$58,326,000thousands by filing date
FOX CORP CL A COM35137L105Stock1,558,718$56,285,000thousands by filing date
BIOMARIN PHARMACEUTICAL INC09061G101COM744,785$56,239,000thousands by filing date
F5 INC COM315616102Stock268,908$56,100,000thousands by filing date
PALO ALTO NETWORKS INC697435105COM171,252$55,153,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock744,898$55,115,000thousands by filing date
SAIA INC78709Y105COM234,231$54,009,000thousands by filing date
SPLUNK INC848637104COM396,808$53,760,000thousands by filing date
EXPEDIA GROUP INC COM NEW30212P303Stock308,212$53,049,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM536,250$52,150,000thousands by filing date
T-Mobile US,Inc.872590104COM413,801$51,845,000thousands by filing date
COGNIZANT TECHNOLOGY SOLUTIONS CL A192446102Stock659,439$51,515,000thousands by filing date
CHURCHILL DOWNS INC171484108COM214,951$48,884,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock430,777$47,821,000thousands by filing date
MASIMO CORP COM574795100Stock207,846$47,734,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock433,548$46,815,000thousands by filing date
NUTANIX INC CL A67059N108Stock1,758,214$46,698,000thousands by filing date
PACIFIC BIOSCIENCES CALIF INC COM69404D108Stock1,396,596$46,521,000thousands by filing date
ROKU INC COM CL A77543R102Stock140,884$45,896,000thousands by filing date
AMEDISYS INC023436108COM172,845$45,768,000thousands by filing date
RINGCENTRAL INC76680R206CL A146,779$43,723,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM708,786$43,519,000thousands by filing date
LAMAR ADVERTISING CO CL A512816109REIT441,767$41,491,000thousands by filing date
REVOLVE GROUP INC CL A76156B107Stock903,439$40,592,000thousands by filing date
PRIMERICA INC74164M108COM270,429$39,975,000thousands by filing date
OAK STR HEALTH INC67181A107COM724,617$39,325,000thousands by filing date
TURNING PT THERAPEUTICS90041T108COM413,005$39,066,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock527,097$36,944,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW416,449$36,752,000thousands by filing date
SHIFT4 PMTS INC CL A82452J109Stock448,130$36,751,000thousands by filing date
CHEESECAKE FACTORY INC163072101COM618,483$36,187,000thousands by filing date
PS BUSINESS PKS INC CALIF69360J107COM229,390$35,459,000thousands by filing date
MERITOR INC59001K100COMMON STOCK1,189,800$35,004,000thousands by filing date
INSMED INC COM PAR $.01457669307Stock1,023,212$34,851,000thousands by filing date
CIRRUS LOGIC INC COM172755100Stock403,735$34,233,000thousands by filing date
SYNAPTICS INC COM87157D109Stock252,430$34,184,000thousands by filing date
INVITAE CORP46185L103COM881,035$33,664,000thousands by filing date
SIGNATURE BANK82669G104COM148,013$33,466,000thousands by filing date
COGENT COMMUNICATIONS GROUP19239V302COM NEW481,046$33,077,000thousands by filing date
Mersana Therapeutics Inc59045L106Common Stock1,998,638$32,338,000thousands by filing date
CMC MATERIALS INC12571T100COM180,777$31,960,000thousands by filing date
MONGODB INC CL A60937P106Stock119,416$31,935,000thousands by filing date
AVALARA INC05338G106COM231,243$30,855,000thousands by filing date
MIMECAST LIMITEDG14838109ORD SHS763,510$30,701,000thousands by filing date
BRIDGEBIO PHARMA INC10806X102COM482,091$29,697,000thousands by filing date
PAYA HOLDINGS INC70434P103COM CL A2,610,958$28,616,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR390,011$28,252,000thousands by filing date
BOTTOMLINE TECH INC DEL101388106COM612,381$27,710,000thousands by filing date
COGNYTE SOFTWARE LTDM25133105ORD SHS988,027$27,477,000thousands by filing date
INNOVIVA INC45781M101COM2,272,279$27,154,000thousands by filing date
AVIENT CORPORATION05368V106COM569,025$26,898,000thousands by filing date
Q2 HLDGS INC COM74736L109Stock259,587$26,011,000thousands by filing date
ADVANCED ENERGY INDS COM007973100Stock235,376$25,696,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock104,359$25,089,000thousands by filing date
PLAYA HOTELS & RESORTS NVN70544106SHS3,419,129$24,960,000thousands by filing date
NXP SEMICONDUCTORS N V COMN6596X109Stock121,301$24,423,000thousands by filing date
II VI INC902104108COM351,212$24,012,000thousands by filing date
SMART GLOBAL HLDGS INCG8232Y101COM518,491$23,861,000thousands by filing date
THE BALDWIN INSURANCE GRP IN05589G102COM CL A868,436$23,665,000thousands by filing date
EXTENDED STAY AMER INC30224P200UNIT 99/99/9999B1,171,945$23,146,000thousands by filing date
Bristol-Myers Squibb Company110122108COM363,548$22,951,000thousands by filing date
First Horizon Corporation320517105Common Capital Stock, par value $0.625 per share1,353,903$22,894,000thousands by filing date
BLACKLINE, INC.09239B109COM206,042$22,335,000thousands by filing date
EVERPURE INC CL A74624M102Stock1,035,705$22,309,000thousands by filing date
CYBERARK SOFTWARE LTD SHSM2682V108Stock169,358$21,905,000thousands by filing date
MSA SAFETY INC COM553498106Stock143,688$21,556,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM256,717$21,166,000thousands by filing date
PALOMAR HLDGS INC COM69753M105Stock310,455$20,813,000thousands by filing date
NOVAVAX INC670002401COM NEW106,009$19,220,000thousands by filing date
Home Depot, Inc437076102COM60,091$18,343,000thousands by filing date
2U INC90214J101COM453,797$17,349,000thousands by filing date
ENPHASE ENERGY INC COM29355A107Stock99,677$16,164,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock86,373$15,862,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock84,379$15,143,000thousands by filing date
Abbott Laboratories002824100COM120,003$14,381,000thousands by filing date
NKARTA INC65487U108COMMON STOCK395,504$13,012,000thousands by filing date
RANPAK HOLDINGS CORP75321W103COMMON STOCK638,153$12,801,000thousands by filing date
PAYLOCITY HLDG CORP COM70438V106Stock70,877$12,746,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM56,382$12,490,000thousands by filing date
REPLIGEN CORP COM759916109Stock56,598$11,003,000thousands by filing date
ORBCOMM INC68555P100COM1,406,233$10,730,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM4,907$10,151,000thousands by filing date
KULICKE & SOFFA INDS INC501242101COM196,756$9,663,000thousands by filing date
Caterpillar Inc.149123101COM37,622$8,723,000thousands by filing date
Walmart Inc.931142103COM60,365$8,199,000thousands by filing date
Comcast Corp20030N101COM147,114$7,960,000thousands by filing date
LAM RESEARCH CORP512807108COM12,645$7,527,000thousands by filing date
Danaher Corporation235851102COM32,771$7,376,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock14,631$7,111,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock37,450$6,421,000thousands by filing date
PRICE T ROWE GROUP INC COM74144T108Stock35,760$6,136,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT37,005$6,080,000thousands by filing date
INGREDION INC COM457187102Stock67,075$6,031,000thousands by filing date
PepsiCo,Inc.713448108COM40,480$5,726,000thousands by filing date
SUN CMNTYS INC COM866674104REIT37,885$5,684,000thousands by filing date
BLACKROCK INC CL A COM09247X101COM7,525$5,674,000thousands by filing date
BHP BILLITON LIMITED SPONSORED ADS088606108ADR71,690$4,975,000thousands by filing date
3M CO COM88579Y101Stock25,795$4,970,000thousands by filing date
Apollo Global Management Inc03768E105COM CL A98,310$4,622,000thousands by filing date
CVS Health Corporation126650100COM60,570$4,557,000thousands by filing date
HARTFORD INSURANCE GROUP INC COM416515104Stock67,865$4,533,000thousands by filing date
CINTAS CORP COM172908105Stock12,680$4,328,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock77,950$3,884,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock26,730$3,276,000thousands by filing date
TELADOC HEALTH INC87918A105COM17,800$3,235,000thousands by filing date
CONSTELLATION BRANDS INC CL A21036P108Stock13,484$3,074,000thousands by filing date
GARTNERINC366651107STOK14,370$2,623,000thousands by filing date
HEICO CORP NEW422806208CL A20,130$2,287,000thousands by filing date
SCIENCE APPLICATIONS INTL CORP COM808625107Stock24,770$2,071,000thousands by filing date
S&P Global,Inc.78409V104COM4,934$1,741,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW22,980$1,588,000thousands by filing date
Walt Disney Co254687106COM7,861$1,451,000thousands by filing date
Starbucks Corporation855244109COM10,750$1,175,000thousands by filing date
Johnson & Johnson478160104COM6,850$1,126,000thousands by filing date
JPMorgan Chase & Co46625H100COM6,300$959,000thousands by filing date
CSX Corporation126408103COM9,530$919,000thousands by filing date
HOWARD HUGHES CORPORATION44267D107COMMON STOCK8,610$819,000thousands by filing date
BAIDU INC SPON ADR REP A056752108ADR3,380$735,000thousands by filing date
ESSENTIAL PPTYS RLTY TR INC COM29670E107REIT31,900$728,000thousands by filing date
FINTECH ACQ IV-A31810N104COMMON STOCK64,280$719,000thousands by filing date
ECHOSTAR CORP278768106CL A28,210$677,000thousands by filing date
HAYWARD HLDGS INC421298100COM40,000$675,000thousands by filing date
SABRE CORP COM78573M104Stock45,000$666,000thousands by filing date
iShares Silver Trust46428Q109COM29,120$661,000thousands by filing date
Merck & Co.,Inc.58933Y105COM8,548$659,000thousands by filing date
NATIONAL STORAGE AFFILIATES TR COM SHS BEN IN637870106REIT16,500$659,000thousands by filing date
METROPOLITAN BANK HOLDING CO591774104COMMON STOCK12,700$640,000thousands by filing date
CASEYS GEN STORES INC147528103COM2,730$590,000thousands by filing date
BUNGE LTDG16962105COM7,250$575,000thousands by filing date
WILLIAMS COS INC COM969457100Stock23,330$553,000thousands by filing date
BIOGEN INC COM09062X103Stock1,857$519,000thousands by filing date
TERRENO RLTY CORP88146M101COM8,840$511,000thousands by filing date
TENCENT MUSIC ENTMT GROUP SPON ADS88034P109ADR24,520$502,000thousands by filing date
PARAMOUNT GLOBAL92556H206CLASS B COM10,770$486,000thousands by filing date
PAGSEGURO DIGITAL LTDG68707101COM CL A9,010$417,000thousands by filing date
DENTSPLY SIRONA INC24906P109COM5,380$343,000thousands by filing date
VENTAS INC COM92276F100REIT4,442$237,000thousands by filing date
ISHARES RUSSELL MID-CAP GROWTH ETF464287481ETF2,004$205,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-21-001659this filing2021-05-14acceptance time not in the bulk data set