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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 2020-12-31, filed 2021-02-12, with 247 holding rows worth $16,852,328,000.

Accession
0001085146-21-000670
Filed
2021-02-12
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q4 2020

A holdings report, 247 entries on the cover page, a total value of $16,852,328,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $16,852,328,000 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 Inc037833100COM4,519,907$599,746,000thousands by filing date
Amazon.com, Inc023135106COM166,980$543,842,000thousands by filing date
Microsoft Corp594918104COM1,955,237$434,884,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM213,566$374,304,000thousands by filing date
ZENDESK INC98936J101COM2,264,009$324,025,000thousands by filing date
META PLATFORMS INC CL A30303M102COM1,098,068$299,948,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR1,729,881$288,510,000thousands by filing date
ServiceNow,Inc.81762P102COM447,303$246,209,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock390,103$241,415,000thousands by filing date
BIO RAD LABS INC090572207CL A412,062$240,207,000thousands by filing date
Salesforce.com, Inc79466L302COM976,318$217,260,000thousands by filing date
GLOBAL PMTS INC37940X102COM895,295$192,864,000thousands by filing date
Visa Inc92826C839COM864,745$189,146,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK806,596$188,905,000thousands by filing date
AMETEK INC COM031100100Stock1,495,250$180,836,000thousands by filing date
Home Depot, Inc437076102COM669,542$177,844,000thousands by filing date
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,215,586$176,454,000thousands by filing date
NIKE,Inc. Class B654106103COM1,233,534$174,508,000thousands by filing date
DARDEN RESTAURANTS INC COM237194105Stock1,399,729$166,736,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM357,198$166,376,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock826,956$161,240,000thousands by filing date
ADVANCED DRAIN SYS INC DEL COM00790R104Stock1,904,882$159,210,000thousands by filing date
FORTINET INC COM34959E109Stock1,063,502$157,962,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM652,910$154,309,000thousands by filing date
Broadcom Inc.11135F101COM347,094$151,975,000thousands by filing date
Applied Materials,Inc.038222105COM1,753,803$151,353,000thousands by filing date
AbbVie,Inc.00287Y109COM1,388,619$148,791,000thousands by filing date
TREX CO INC89531P105COM1,765,684$147,823,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock1,021,956$144,566,000thousands by filing date
SPLUNK INC848637104COM837,767$142,328,000thousands by filing date
WORKDAY INC CL A98138H101Stock575,851$137,980,000thousands by filing date
HUBSPOTINC443573100STOK345,625$137,020,000thousands by filing date
Qualcomm Incorporated747525103COM895,559$136,429,000thousands by filing date
TOPBUILD COR COM89055F103Stock733,168$134,962,000thousands by filing date
HUMANA INC COM444859102Stock327,615$134,411,000thousands by filing date
Boston Scientific Corporation101137107COM3,464,728$124,557,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR434,868$123,302,000thousands by filing date
Union Pacific Corporation907818108COM591,337$123,128,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock1,026,288$122,303,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock1,162,967$121,204,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock106,147$120,974,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock480,509$120,516,000thousands by filing date
IDEXX LABS INC COM45168D104Stock239,444$119,691,000thousands by filing date
STERIS PLC SHS USDG8473T100Stock617,569$117,054,000thousands by filing date
NATIONAL VISION HLDGS INC COM63845R107Stock2,558,631$115,880,000thousands by filing date
Bristol-Myers Squibb Company110122108COM1,845,192$114,457,000thousands by filing date
ESSEX PPTY TR INC COM297178105REIT471,409$111,922,000thousands by filing date
ACCELERON PHARMA INC00434H108COM865,507$110,733,000thousands by filing date
TWILIO INC CL A90138F102Stock325,148$110,063,000thousands by filing date
INSULET CORP COM45784P101Stock425,894$108,871,000thousands by filing date
ETSY INC29786A106COM601,451$107,004,000thousands by filing date
Morgan Stanley617446448COM1,545,505$105,913,000thousands by filing date
TRANSUNION COM89400J107Stock1,050,731$104,254,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock831,100$102,815,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock255,140$100,010,000thousands by filing date
NCR VOYIX CORPORATION62886E108COM2,648,189$99,492,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM868,067$97,354,000thousands by filing date
IDEX CORP COM45167R104Stock488,445$97,298,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK8,488,042$96,679,000thousands by filing date
FIVE BELOW INC COM33829M101Stock551,036$96,420,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW264,028$95,927,000thousands by filing date
SEAGEN INC81181C104COM539,865$94,552,000thousands by filing date
CHIPOTLEMEXICANGRILLI169656105STOK67,318$93,351,000thousands by filing date
NVIDIA Corp67066G104COM177,519$92,700,000thousands by filing date
ZYNGA INC.98986T108CL A9,275,709$91,551,000thousands by filing date
OREILLY AUTOMOTIVE INC COM67103H107Stock199,675$90,367,000thousands by filing date
ROCKET PHARMACEUTICALS INC77313F106COM1,594,981$87,469,000thousands by filing date
SCIENCE APPLICATIONS INTL CORP COM808625107Stock918,554$86,932,000thousands by filing date
WEX INC96208T104COM424,838$86,467,000thousands by filing date
Netflix, Inc64110L106COM157,892$85,377,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM311,451$84,973,000thousands by filing date
F5 INC COM315616102Stock457,907$80,564,000thousands by filing date
BRP INC COM SUN VTG05577W200Stock1,218,882$80,422,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM681,293$79,200,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock571,880$78,982,000thousands by filing date
RINGCENTRAL INC76680R206CL A208,152$78,883,000thousands by filing date
ROSS STORES INC COM778296103Stock639,285$78,511,000thousands by filing date
MSCI INC COM55354G100Stock173,817$77,615,000thousands by filing date
XILINX INC983919101COM545,622$77,353,000thousands by filing date
TIMKEN CO887389104COM991,872$76,731,000thousands by filing date
BIOMARIN PHARMACEUTICAL INC09061G101COM851,872$74,701,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM293,626$73,365,000thousands by filing date
SUN CMNTYS INC COM866674104REIT477,264$72,520,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock77,851$71,956,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock239,410$68,749,000thousands by filing date
Caterpillar Inc.149123101COM375,807$68,404,000thousands by filing date
MONGODB INC CL A60937P106Stock190,005$68,219,000thousands by filing date
MASIMO CORP COM574795100Stock237,443$63,725,000thousands by filing date
AZEK CO INC05478C105CL A1,647,300$63,339,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock532,642$63,251,000thousands by filing date
REALPAGE INC75606N109COM715,553$62,425,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock657,883$62,367,000thousands by filing date
COGNIZANT TECHNOLOGY SOLUTIONS CL A192446102Stock759,790$62,265,000thousands by filing date
TRADEWEB MKTS INC CL A892672106Stock996,056$62,204,000thousands by filing date
S&P Global,Inc.78409V104COM188,543$61,980,000thousands by filing date
SENSATA TECHNOLOGIES HLDG PLg8060n102SHS1,173,214$61,875,000thousands by filing date
CATALENT INC USD 0.01148806102COM594,314$61,850,000thousands by filing date
ROKU INC COM CL A77543R102Stock185,524$61,598,000thousands by filing date
DEXCOM INC COM252131107Stock166,004$61,375,000thousands by filing date
RPM INTL INC COM749685103Stock670,173$60,838,000thousands by filing date
TARGET CORP COM87612E106Stock343,314$60,605,000thousands by filing date
NXP SEMICONDUCTORS N V COMN6596X109Stock371,504$59,073,000thousands by filing date
HORIZON THERAPEUTICS PLCG46188101SHS806,188$58,973,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM1,313,826$57,927,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock653,093$57,701,000thousands by filing date
SYNCHRONYFINL87165B103STOK1,625,976$56,438,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock926,988$55,471,000thousands by filing date
ITT INC COM45073V108Stock704,805$54,284,000thousands by filing date
AMEDISYS INC023436108COM185,060$54,284,000thousands by filing date
Micron Technology,Inc.595112103COM717,918$53,973,000thousands by filing date
SS&C TECH HLDGS COM78467J100Stock741,244$53,926,000thousands by filing date
CELANESE CORP DEL COM150870103Stock414,661$53,881,000thousands by filing date
SPIRIT RLTY CAP INC NEW NPV84860W300COM NEW1,331,461$53,485,000thousands by filing date
NUTANIX INC CL A67059N108Stock1,636,106$52,143,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock265,879$51,894,000thousands by filing date
ESSENTIAL PPTYS RLTY TR INC COM29670E107REIT2,340,469$49,618,000thousands by filing date
ON SEMICONDUCTOR CORP COM682189105Stock1,513,001$49,521,000thousands by filing date
MKS INC. COM55306N104Stock328,725$49,457,000thousands by filing date
BOTTOMLINE TECH INC DEL101388106COM928,927$48,992,000thousands by filing date
WILLIAMS SONOMA INC COM969904101Stock478,076$48,687,000thousands by filing date
LIGHTSPEED POS INC53227R106SUB VTG SHS687,066$48,363,000thousands by filing date
TURNING PT THERAPEUTICS90041T108COM390,967$47,639,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM279,328$47,623,000thousands by filing date
ANAPLAN INC03272L108COM652,941$46,914,000thousands by filing date
FMC CORP COM NEW302491303Stock403,984$46,430,000thousands by filing date
SILICON MOTION TECHNOLOGY CORP SPONSORED ADR82706C108ADR947,119$45,604,000thousands by filing date
CHURCHILL DOWNS INC171484108COM231,108$45,018,000thousands by filing date
EXPEDIA GROUP INC COM NEW30212P303Stock336,126$44,503,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM464,086$44,483,000thousands by filing date
ADVANCED ENERGY INDS COM007973100Stock454,272$44,051,000thousands by filing date
SAIA INC78709Y105COM240,639$43,508,000thousands by filing date
LAMAR ADVERTISING CO CL A512816109REIT522,300$43,466,000thousands by filing date
INSMED INC COM PAR $.01457669307Stock1,278,676$42,567,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM756,948$42,533,000thousands by filing date
PALO ALTO NETWORKS INC697435105COM114,162$40,572,000thousands by filing date
CERIDIAN HCM HLDG INC15677J108COM369,710$39,396,000thousands by filing date
D R HORTON INC COM23331A109Stock568,338$39,170,000thousands by filing date
MIMECAST LIMITEDG14838109ORD SHS682,658$38,802,000thousands by filing date
HEICO CORP NEW422806208CL A327,464$38,333,000thousands by filing date
MAXLINEAR INC57776J100COM1,003,631$38,329,000thousands by filing date
AVALARA INC05338G106COM230,655$38,033,000thousands by filing date
ALTERYX, INC (CLASS A)02156B103COM CL A312,060$38,006,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock141,039$36,889,000thousands by filing date
PALOMAR HLDGS INC COM69753M105Stock414,702$36,842,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW380,432$36,400,000thousands by filing date
SHIFT4 PMTS INC CL A82452J109Stock480,809$36,253,000thousands by filing date
FIRST REPUBLIC BANK/SAN FRANCI33616C100COM246,383$36,201,000thousands by filing date
ASSURANT INC COM04621X108Stock263,391$35,879,000thousands by filing date
EXTENDED STAY AMER INC30224P200UNIT 99/99/9999B2,405,919$35,632,000thousands by filing date
PRIMERICA INC74164M108COM263,612$35,306,000thousands by filing date
HEXCEL CORP NEW428291108COM697,395$33,817,000thousands by filing date
REVOLVE GROUP INC CL A76156B107Stock1,066,316$33,237,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM162,263$33,082,000thousands by filing date
SMARTSHEET INC. (CLASS A)83200N103COM CL A461,760$31,995,000thousands by filing date
MERITOR INC59001K100COMMON STOCK1,139,580$31,806,000thousands by filing date
SAGE THERAPEUTICS INC78667J108COM353,603$30,590,000thousands by filing date
ISHARES TR464287648RUS 2000 GRW ETF106,520$30,539,000thousands by filing date
OPEN LENDING CORP68373J104COM868,409$30,360,000thousands by filing date
CIRRUS LOGIC INC COM172755100Stock362,321$29,783,000thousands by filing date
BLACKLINE, INC.09239B109COM220,983$29,475,000thousands by filing date
HOWARD HUGHES CORPORATION44267D107COMMON STOCK364,842$28,797,000thousands by filing date
CHEESECAKE FACTORY INC163072101COM773,533$28,667,000thousands by filing date
REPAY HLDGS CORP76029L100COM CL A1,049,859$28,609,000thousands by filing date
KULICKE & SOFFA INDS INC501242101COM897,618$28,553,000thousands by filing date
CYBERARK SOFTWARE LTD SHSM2682V108Stock169,994$27,469,000thousands by filing date
PS BUSINESS PKS INC CALIF69360J107COM202,745$26,939,000thousands by filing date
2U INC90214J101COM646,442$25,864,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock252,080$25,856,000thousands by filing date
TEXAS ROADHOUSE INC COM882681109Stock320,421$25,044,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR343,593$24,756,000thousands by filing date
VIAVI SOLUTIONS INC925550105COM1,650,457$24,716,000thousands by filing date
BRIDGEBIO PHARMA INC10806X102COM346,880$24,667,000thousands by filing date
KINSALECAPGROUPINC49714P108STOK115,936$23,202,000thousands by filing date
MSA SAFETY INC COM553498106Stock154,326$23,055,000thousands by filing date
FIBROGEN INC31572Q808COM591,464$21,937,000thousands by filing date
ACI WORLDWIDE INC COM004498101Stock568,940$21,864,000thousands by filing date
THE BALDWIN INSURANCE GRP IN05589G102COM CL A687,093$20,592,000thousands by filing date
HAMILTON LANE INC407497106CL A263,771$20,587,000thousands by filing date
CHANGE HEALTHCARE INC15912K100COM1,027,856$19,170,000thousands by filing date
CHEGG INC163092109COM210,923$19,053,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock90,469$16,655,000thousands by filing date
REPLIGEN CORP COM759916109Stock82,638$15,836,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM159,639$14,516,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock87,430$13,561,000thousands by filing date
Abbott Laboratories002824100COM122,451$13,407,000thousands by filing date
SITIME CORP COM82982T106Stock114,014$12,762,000thousands by filing date
Mersana Therapeutics Inc59045L106Common Stock462,378$12,304,000thousands by filing date
EIDOS THERAPEUTICS INC.28249H104Common Stock93,422$12,292,000thousands by filing date
ORBCOMM INC68555P100COM1,508,604$11,194,000thousands by filing date
PAYA HOLDINGS INC70434P103COM CL A814,803$11,065,000thousands by filing date
BLACK DIAMOND THERAPEUTICS I09203E105COM328,405$10,525,000thousands by filing date
INNOVIVA INC45781M101COM838,051$10,383,000thousands by filing date
ADTRAN INC00738A106COMMON STOCK698,986$10,324,000thousands by filing date
Walmart Inc.931142103COM61,500$8,865,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM4,950$8,672,000thousands by filing date
Comcast Corp20030N101COM151,018$7,913,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock14,691$7,508,000thousands by filing date
Danaher Corporation235851102COM32,263$7,167,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT37,750$6,728,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM40,929$6,630,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock37,450$6,478,000thousands by filing date
PepsiCo,Inc.713448108COM40,900$6,065,000thousands by filing date
LAM RESEARCH CORP512807108COM12,760$6,026,000thousands by filing date
Citigroup Inc.172967424COM97,465$6,010,000thousands by filing date
Starbucks Corporation855244109COM56,133$6,005,000thousands by filing date
BLACKROCK INC CL A COM09247X101COM7,735$5,581,000thousands by filing date
PRICE T ROWE GROUP INC COM74144T108Stock36,785$5,569,000thousands by filing date
Apollo Global Management Inc03768E105COM CL A99,310$4,864,000thousands by filing date
TRINSEO S AL9340P101SHS86,720$4,441,000thousands by filing date
LULULEMON ATHLETICA INC550021109COM12,431$4,326,000thousands by filing date
American Tower Corporation03027X100COM19,115$4,291,000thousands by filing date
BEST BUY INC COM086516101Stock40,125$4,004,000thousands by filing date
PAYLOCITY HLDG CORP COM70438V106Stock18,840$3,879,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT13,570$3,829,000thousands by filing date
TELADOC HEALTH INC87918A105COM17,800$3,559,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock12,140$3,387,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock77,950$3,229,000thousands by filing date
CONSTELLATION BRANDS INC CL A21036P108Stock13,418$2,939,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock25,560$2,791,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock26,730$2,557,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM147,249$2,537,000thousands by filing date
PROOFPOINT INC743424103COM18,320$2,499,000thousands by filing date
GARTNERINC366651107STOK14,370$2,302,000thousands by filing date
Walt Disney Co254687106COM8,936$1,619,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW22,980$1,492,000thousands by filing date
Costco Wholesale Corporation22160K105COM3,517$1,325,000thousands by filing date
ATLASSIAN CORPG06242104CL A4,770$1,116,000thousands by filing date
T-Mobile US,Inc.872590104COM8,019$1,081,000thousands by filing date
Johnson & Johnson478160104COM6,850$1,078,000thousands by filing date
CUTERA INC232109108COM42,680$1,029,000thousands by filing date
VANECK ETF TRUST92189F106GOLD MINERS ETF24,130$869,000thousands by filing date
CSX Corporation126408103COM9,530$865,000thousands by filing date
Merck & Co.,Inc.58933Y105COM10,469$856,000thousands by filing date
SIGNATURE BANK82669G104COM5,940$804,000thousands by filing date
JPMorgan Chase & Co46625H100COM6,300$801,000thousands by filing date
NATIONAL STORAGE AFFILIATES TR COM SHS BEN IN637870106REIT16,500$594,000thousands by filing date
iShares Silver Trust46428Q109COM21,990$540,000thousands by filing date
KADANT INC48282T104COM3,740$527,000thousands by filing date
TERRENO RLTY CORP88146M101COM8,840$517,000thousands by filing date
PAGSEGURO DIGITAL LTDG68707101COM CL A9,010$512,000thousands by filing date
CASEYS GEN STORES INC147528103COM2,730$488,000thousands by filing date
CUMMINS INC COM231021106Stock2,140$486,000thousands by filing date
METROPOLITAN BANK HOLDING CO591774104COMMON STOCK12,700$461,000thousands by filing date
BIOGEN INC COM09062X103Stock1,813$444,000thousands by filing date
ALIBABA GROUP HLDG LTD01609W102SPONSORED ADS1,893$441,000thousands by filing date
PG&E CORP COM69331C108Stock26,200$326,000thousands by filing date
VENTAS INC COM92276F100REIT4,442$218,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-21-000670this filing2021-02-12acceptance time not in the bulk data set