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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 2020-09-30, filed 2020-11-13, with 235 holding rows worth $15,448,316,000.

Accession
0001085146-20-002944
Filed
2020-11-13
Accepted by EDGAR
acceptance time not in the bulk data set
Ingested
Source
SEC quarterly data set

Original filing

13F report for Q3 2020

A holdings report, 235 entries on the cover page, a total value of $15,448,316,000 stated on the cover page (in dollars after the unit check, H1), rows summing to $15,448,316,000 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 Inc037833100COM5,167,793$598,482,000thousands by filing date
Amazon.com, Inc023135106COM182,499$574,640,000thousands by filing date
Microsoft Corp594918104COM2,147,370$451,656,000thousands by filing date
Alphabet Inc. Reg. Shares A02079K305COM236,257$346,258,000thousands by filing date
META PLATFORMS INC CL A30303M102COM1,207,634$316,279,000thousands by filing date
ASCENDIS PHARMA A/S DKK 1.0 AD04351P101SPONSORED ADR1,789,774$276,198,000thousands by filing date
Salesforce.com, Inc79466L302COM1,063,679$267,324,000thousands by filing date
ZENDESK INC98936J101COM2,464,088$253,604,000thousands by filing date
ServiceNow,Inc.81762P102COM500,514$242,749,000thousands by filing date
Visa Inc92826C839COM1,093,815$218,730,000thousands by filing date
FIDELITY NATL INFORMATION SVCS COM31620M106Stock1,417,297$208,640,000thousands by filing date
Home Depot, Inc437076102COM747,568$207,607,000thousands by filing date
PAYPALHLDGSINC70450Y103STOK1,006,974$198,404,000thousands by filing date
Thermo Fisher Scientific Inc.883556102COM425,484$187,860,000thousands by filing date
SPLUNK INC848637104COM995,222$187,231,000thousands by filing date
TRANSDIGM GROUP INC COM893641100Stock376,080$178,683,000thousands by filing date
NIKE,Inc. Class B654106103COM1,351,089$169,616,000thousands by filing date
TRANE TECHNOLOGIES PLC SHSG8994E103Stock1,351,792$163,905,000thousands by filing date
Vertex Pharmaceuticals Incorporated92532F100COM596,479$162,314,000thousands by filing date
ICON PUB LTD CO SHSG4705A100Stock829,878$158,581,000thousands by filing date
BIO RAD LABS INC090572207CL A298,033$153,624,000thousands by filing date
AMETEK INC COM031100100Stock1,530,963$152,178,000thousands by filing date
HUMANA INC COM444859102Stock359,338$148,726,000thousands by filing date
DARDEN RESTAURANTS INC COM237194105Stock1,467,619$147,848,000thousands by filing date
TOPBUILD COR COM89055F103Stock864,066$147,487,000thousands by filing date
GLOBAL PMTS INC37940X102COM815,849$144,878,000thousands by filing date
Qualcomm Incorporated747525103COM1,185,878$139,554,000thousands by filing date
Broadcom Inc.11135F101COM377,089$137,381,000thousands by filing date
METTLER TOLEDO INTERNATIONAL COM592688105Stock139,858$135,068,000thousands by filing date
FORTINET INC COM34959E109Stock1,109,738$130,738,000thousands by filing date
Applied Materials,Inc.038222105COM2,183,898$129,833,000thousands by filing date
CHARTER COMMUNICATIONS INC N16119P108COM207,701$129,676,000thousands by filing date
ALIGN TECHNOLOGY INC COM016255101Stock390,861$127,952,000thousands by filing date
TREX CO INC89531P105COM1,775,869$127,152,000thousands by filing date
Union Pacific Corporation907818108COM643,297$126,646,000thousands by filing date
Bristol-Myers Squibb Company110122108COM2,045,976$123,352,000thousands by filing date
S&P Global,Inc.78409V104COM337,287$121,626,000thousands by filing date
STERIS PLC SHS USDG8473T100Stock680,194$119,843,000thousands by filing date
OREILLY AUTOMOTIVE INC COM67103H107Stock256,602$118,314,000thousands by filing date
Boston Scientific Corporation101137107COM3,002,613$114,730,000thousands by filing date
QUEST DIAGNOSTICS INC COM74834L100Stock984,866$112,757,000thousands by filing date
T-Mobile US,Inc.872590104COM951,142$108,773,000thousands by filing date
ADVANCED DRAIN SYS INC DEL COM00790R104Stock1,737,836$108,510,000thousands by filing date
IDEXX LABS INC COM45168D104Stock274,522$107,917,000thousands by filing date
American Tower Corporation03027X100COM441,070$106,620,000thousands by filing date
HUBSPOTINC443573100STOK357,646$104,515,000thousands by filing date
NICE LTD SPONSORED ADR653656108ADR457,674$103,906,000thousands by filing date
INSULET CORP COM45784P101Stock436,686$103,316,000thousands by filing date
TELEDYNE TECHNOLOGIES INC COM879360105Stock325,534$100,984,000thousands by filing date
GALLAGHER ARTHUR J & CO COM363576109Stock953,780$100,700,000thousands by filing date
BLUEPRINT MEDICINES CORP09627Y109COM1,060,798$98,336,000thousands by filing date
WORKDAY INC CL A98138H101Stock449,872$96,781,000thousands by filing date
ROCKWELL AUTOMATION INC COM773903109Stock438,027$96,664,000thousands by filing date
ACCELERON PHARMA INC00434H108COM847,149$95,330,000thousands by filing date
THE COOPER COMPANIES216648402COM NEW279,400$94,191,000thousands by filing date
TARGET CORP COM87612E106Stock591,027$93,039,000thousands by filing date
Netflix, Inc64110L106COM180,593$90,302,000thousands by filing date
CHIPOTLEMEXICANGRILLI169656105STOK71,429$88,837,000thousands by filing date
TWILIO INC CL A90138F102Stock347,413$85,842,000thousands by filing date
ETSY INC29786A106COM702,598$85,457,000thousands by filing date
SUN CMNTYS INC COM866674104REIT601,051$84,514,000thousands by filing date
SBA COMMUNICATIONS CORP CL A78410G104REIT258,933$82,465,000thousands by filing date
TRANSUNION COM89400J107Stock953,809$80,244,000thousands by filing date
FLEETCOR TECHNOLOGIES INC339041105COM331,397$78,906,000thousands by filing date
DROPBOX INC CL A26210C104Stock3,987,158$76,793,000thousands by filing date
SEATTLE GENETICS INC812578102COM392,016$76,714,000thousands by filing date
HAEMONETICS CORP MASS COM405024100Stock842,411$73,500,000thousands by filing date
FIVE BELOW INC COM33829M101Stock565,002$71,755,000thousands by filing date
MICROCHIP TECHNOLOGY INC. COM595017104Stock681,307$70,011,000thousands by filing date
ZYNGA INC.98986T108CL A7,662,437$69,881,000thousands by filing date
DEXCOM INC COM252131107Stock168,518$69,468,000thousands by filing date
SCIENCE APPLICATIONS INTL CORP COM808625107Stock883,035$69,248,000thousands by filing date
COSTAR GROUP INC COM22160N109Stock81,259$68,949,000thousands by filing date
LPL FINL HLDGS INC COM50212V100Stock899,122$68,936,000thousands by filing date
MASIMO CORP COM574795100Stock290,543$68,586,000thousands by filing date
HUNT J B TRANS SVCS INC COM445658107Stock529,107$66,869,000thousands by filing date
BRP INC COM SUN VTG05577W200Stock1,253,174$66,193,000thousands by filing date
Marsh & McLennan Companies,Inc.571748102COM565,558$64,870,000thousands by filing date
LINCOLN ELEC HLDGS INC533900106COM701,398$64,557,000thousands by filing date
ROSS STORES INC COM778296103Stock673,918$62,890,000thousands by filing date
Caterpillar Inc.149123101COM421,316$62,839,000thousands by filing date
TRADEWEB MKTS INC CL A892672106Stock1,066,298$61,845,000thousands by filing date
IRONWOOD PHARMACEUTICALS INC46333X108COMMON STOCK6,846,192$61,581,000thousands by filing date
CHARLES RIV LABS INTL INC159864107COM269,362$60,997,000thousands by filing date
WEX INC96208T104COM437,854$60,849,000thousands by filing date
D R HORTON INC COM23331A109Stock790,337$59,773,000thousands by filing date
SS&C TECH HLDGS COM78467J100Stock986,231$59,687,000thousands by filing date
RPM INTL INC COM749685103Stock717,902$59,471,000thousands by filing date
BLACK KNIGHT INC COM09215C105Stock662,859$57,702,000thousands by filing date
ULTA BEAUTY INC COM90384S303Stock256,445$57,439,000thousands by filing date
OLD DOMINION FREIGHT LINE INC COM679580100Stock317,377$57,420,000thousands by filing date
SENSATA TECHNOLOGIES HLDG PLg8060n102SHS1,319,583$56,927,000thousands by filing date
TIMKEN CO887389104COM1,028,357$55,758,000thousands by filing date
COGNIZANT TECHNOLOGY SOLUTIONS CL A192446102Stock802,901$55,737,000thousands by filing date
MSCI INC COM55354G100Stock155,851$55,605,000thousands by filing date
PACIRA BIOSCIENCES INC COM695127100Stock912,775$54,876,000thousands by filing date
KBHOME48666K109COM1,382,251$53,065,000thousands by filing date
NCR VOYIX CORPORATION62886E108COM2,342,771$51,869,000thousands by filing date
FAIR ISAAC CORP COM303250104Stock116,395$49,512,000thousands by filing date
PALOMAR HLDGS INC COM69753M105Stock473,212$49,328,000thousands by filing date
NXP SEMICONDUCTORS N V COMN6596X109Stock393,692$49,137,000thousands by filing date
ALTERYX, INC (CLASS A)02156B103COM CL A432,279$49,085,000thousands by filing date
BLOCK INC CL A852234103Stock298,983$48,600,000thousands by filing date
BIOMARIN PHARMACEUTICAL INC09061G101COM637,080$48,469,000thousands by filing date
SAREPTA THERAPEUTICS INC803607100COM342,155$48,049,000thousands by filing date
NVIDIA Corp67066G104COM88,065$47,663,000thousands by filing date
LUMENTUM HLDGS INC COM55024U109Stock631,953$47,479,000thousands by filing date
LAM RESEARCH CORP512807108COM140,693$46,675,000thousands by filing date
CELANESE CORP DEL COM150870103Stock433,871$46,619,000thousands by filing date
MONGODB INC CL A60937P106Stock200,302$46,372,000thousands by filing date
CATALENT INC USD 0.01148806102COM535,376$45,860,000thousands by filing date
NUANCE COMMUNICATIONS INC67020Y100COM1,368,696$45,427,000thousands by filing date
ESSENTIAL PPTYS RLTY TR INC COM29670E107REIT2,401,820$44,001,000thousands by filing date
FMC CORP COM NEW302491303Stock409,369$43,356,000thousands by filing date
INSMED INC COM PAR $.01457669307Stock1,332,488$42,826,000thousands by filing date
BURLINGTON STORES INC COM122017106Stock204,085$42,060,000thousands by filing date
REALPAGE INC75606N109COM726,553$41,879,000thousands by filing date
AMEDISYS INC023436108COM175,519$41,498,000thousands by filing date
ANAPLAN INC03272L108COM662,075$41,433,000thousands by filing date
VIAVI SOLUTIONS INC925550105COM3,463,778$40,630,000thousands by filing date
PROOFPOINT INC743424103COM381,391$40,256,000thousands by filing date
CHURCHILL DOWNS INC171484108COM241,418$39,549,000thousands by filing date
LULULEMON ATHLETICA INC550021109COM119,997$39,523,000thousands by filing date
NATIONAL VISION HLDGS INC COM63845R107Stock1,025,075$39,199,000thousands by filing date
NEUROCRINE BIOSCIENCES INC64125C109COM404,251$38,873,000thousands by filing date
ASSURANT INC COM04621X108Stock317,881$38,562,000thousands by filing date
BERRY GLOBAL GROUP INC08579W103COM787,603$38,057,000thousands by filing date
TEXAS ROADHOUSE INC COM882681109Stock623,739$37,917,000thousands by filing date
IDEX CORP COM45167R104Stock203,699$37,157,000thousands by filing date
LAMAR ADVERTISING CO CL A512816109REIT543,585$35,969,000thousands by filing date
ROCKET PHARMACEUTICALS INC77313F106COM1,498,493$34,256,000thousands by filing date
STORE CAP CORP862121100COM1,247,937$34,231,000thousands by filing date
RINGCENTRAL INC76680R206CL A123,911$34,027,000thousands by filing date
SAGE THERAPEUTICS INC78667J108COM555,473$33,951,000thousands by filing date
MIMECAST LIMITEDG14838109ORD SHS709,943$33,311,000thousands by filing date
REXFORD INDL RLTY INC COM76169C100REIT712,509$32,604,000thousands by filing date
MYOKARDIA INC62857M105COM237,991$32,445,000thousands by filing date
EXPEDIA GROUP INC COM NEW30212P303Stock353,782$32,438,000thousands by filing date
ADVANCED ENERGY INDS COM007973100Stock512,610$32,264,000thousands by filing date
MKS INC. COM55306N104Stock290,996$31,785,000thousands by filing date
SAIA INC78709Y105COM251,619$31,739,000thousands by filing date
UNIFIRST CORP MASS904708104COM166,251$31,483,000thousands by filing date
PRIMERICA INC74164M108COM275,412$31,160,000thousands by filing date
ILLINOIS TOOL WKS INC452308109COM161,211$31,148,000thousands by filing date
CERIDIAN HCM HLDG INC15677J108COM375,940$31,071,000thousands by filing date
BOTTOMLINE TECH INC DEL101388106COM724,605$30,549,000thousands by filing date
AVALARA INC05338G106COM233,947$29,791,000thousands by filing date
HEICO CORP NEW422806208CL A331,834$29,420,000thousands by filing date
EXTENDED STAY AMER INC30224P200UNIT 99/99/9999B2,435,004$29,098,000thousands by filing date
OPEN LENDING CORP68373J104COM1,129,387$28,799,000thousands by filing date
SMARTSHEET INC. (CLASS A)83200N103COM CL A582,457$28,785,000thousands by filing date
TANDEM DIABETES CARE INC875372203COM NEW249,570$28,326,000thousands by filing date
WNS HOLDINGS LTD92932M101SPON ADR438,894$28,072,000thousands by filing date
WASTE CONNECTIONS INC COM94106B101Stock267,153$27,730,000thousands by filing date
REPAY HLDGS CORP76029L100COM CL A1,164,269$27,360,000thousands by filing date
FIRST REPUBLIC BANK/SAN FRANCI33616C100COM249,292$27,188,000thousands by filing date
ITT INC COM45073V108Stock450,903$26,626,000thousands by filing date
TURNING PT THERAPEUTICS90041T108COM302,619$26,437,000thousands by filing date
SITIME CORP COM82982T106Stock308,443$25,918,000thousands by filing date
F5 INC COM315616102Stock209,891$25,768,000thousands by filing date
NEXSTAR MEDIA GROUP INC COMMON STOCK65336K103Stock272,148$24,474,000thousands by filing date
SILICON MOTION TECHNOLOGY CORP SPONSORED ADR82706C108ADR644,026$24,331,000thousands by filing date
MERITOR INC59001K100COMMON STOCK1,158,710$24,263,000thousands by filing date
EQUITY LIFESTYLE PROPERTIES COM29472R108REIT391,333$23,989,000thousands by filing date
AZEK CO INC05478C105CL A664,281$23,124,000thousands by filing date
2U INC90214J101COM674,117$22,826,000thousands by filing date
HAMILTON LANE INC407497106CL A352,640$22,777,000thousands by filing date
HOWARD HUGHES CORPORATION44267D107COMMON STOCK380,167$21,898,000thousands by filing date
MSA SAFETY INC COM553498106Stock161,066$21,610,000thousands by filing date
KINSALECAPGROUPINC49714P108STOK112,733$21,440,000thousands by filing date
BLACKLINE, INC.09239B109COM230,768$20,684,000thousands by filing date
SHIFT4 PMTS INC CL A82452J109Stock422,839$20,448,000thousands by filing date
PAYLOCITY HLDG CORP COM70438V106Stock121,595$19,628,000thousands by filing date
GROCERY OUTLET HLDG CORP COM39874R101Stock486,069$19,112,000thousands by filing date
ENVESTNET INC29404K106COM241,658$18,646,000thousands by filing date
CHAMPION HOMES INC830830105COM674,411$18,054,000thousands by filing date
FATE THERAPEUTICS INC31189P102COM410,329$16,401,000thousands by filing date
MAXLINEAR INC57776J100COM697,179$16,202,000thousands by filing date
ACI WORLDWIDE INC COM004498101Stock594,765$15,541,000thousands by filing date
CHEGG INC163092109COM213,418$15,247,000thousands by filing date
Abbott Laboratories002824100COM122,686$13,352,000thousands by filing date
REPLIGEN CORP COM759916109Stock86,003$12,689,000thousands by filing date
EIDOS THERAPEUTICS INC.28249H104Common Stock239,182$12,086,000thousands by filing date
GLOBAL BLOOD THERAPEUTICS USD37890U108COM217,850$12,012,000thousands by filing date
AVERY DENNISON CORP COM053611109Stock87,430$11,177,000thousands by filing date
DIODES INC COM254543101Stock194,289$10,968,000thousands by filing date
FIBROGEN INC31572Q808COM233,196$9,589,000thousands by filing date
THE BALDWIN INSURANCE GRP IN05589G102COM CL A379,812$9,461,000thousands by filing date
MADISON SQUARE GRDN SPRT CORP CL A55825T103Stock62,674$9,431,000thousands by filing date
Walmart Inc.931142103COM61,500$8,604,000thousands by filing date
Alphabet Inc. Reg. Shares C02079K107COM5,369$7,890,000thousands by filing date
Starbucks Corporation855244109COM87,996$7,561,000thousands by filing date
Comcast Corp20030N101COM151,628$7,014,000thousands by filing date
Danaher Corporation235851102COM32,167$6,927,000thousands by filing date
HENRY JACK & ASSOC INC426281101COM40,929$6,655,000thousands by filing date
Merck & Co.,Inc.58933Y105COM74,499$6,180,000thousands by filing date
ALEXANDRIA REAL ESTATE EQ INC COM015271109REIT37,750$6,040,000thousands by filing date
ADTRAN INC00738A106COMMON STOCK556,459$5,706,000thousands by filing date
BRIGHT HORIZONS FAM SOL IN DEL COM109194100Stock37,450$5,694,000thousands by filing date
PepsiCo,Inc.713448108COM40,900$5,669,000thousands by filing date
FIRST AMERN FINL CORP31847R102COM96,420$4,909,000thousands by filing date
PRICE T ROWE GROUP INC COM74144T108Stock36,785$4,717,000thousands by filing date
BEST BUY INC COM086516101Stock40,125$4,466,000thousands by filing date
BLACKROCK INC CL A COM09247X101COM7,735$4,359,000thousands by filing date
Citigroup Inc.172967424COM93,785$4,043,000thousands by filing date
TELADOC HEALTH INC87918A105COM17,800$3,902,000thousands by filing date
Apollo Global Management Inc03768E105COM CL A64,975$2,908,000thousands by filing date
RUSH ENTERPRISES INC CL A781846209Stock51,967$2,626,000thousands by filing date
VAIL RESORTS INC COM91879Q109Stock12,140$2,598,000thousands by filing date
CONSTELLATION BRANDS INC CL A21036P108Stock13,432$2,545,000thousands by filing date
MARTEN TRANSPORT LTD573075108COM147,249$2,403,000thousands by filing date
RAYMOND JAMES FINL INC COM754730109Stock26,730$1,945,000thousands by filing date
GARTNERINC366651107STOK14,370$1,796,000thousands by filing date
Costco Wholesale Corporation22160K105COM4,786$1,699,000thousands by filing date
Walt Disney Co254687106COM9,264$1,149,000thousands by filing date
STRATEGIC ED INC COM86272C103Stock12,260$1,121,000thousands by filing date
INTEGRA LIFESCIENCES HLDGS C457985208COM NEW22,980$1,085,000thousands by filing date
CUTERA INC232109108COM42,680$810,000thousands by filing date
CSX Corporation126408103COM9,530$740,000thousands by filing date
ATLASSIAN CORPG06242104CL A3,980$724,000thousands by filing date
FINTECH ACQUISITION CORP V CLA31811A101COM58,170$600,000thousands by filing date
ALIBABA GROUP HLDG LTD01609W102SPONSORED ADS1,893$557,000thousands by filing date
NATIONAL STORAGE AFFILIATES TR COM SHS BEN IN637870106REIT16,500$540,000thousands by filing date
BIOGEN INC COM09062X103Stock1,832$520,000thousands by filing date
HILTON WORLDWIDE HLDGS INC COM43300A203Stock6,003$512,000thousands by filing date
SIGNATURE BANK82669G104COM5,940$493,000thousands by filing date
TERRENO RLTY CORP88146M101COM8,840$484,000thousands by filing date
WOODWARD INC COM980745103Stock6,020$483,000thousands by filing date
SVB FINANCIAL GROUP78486Q101COM1,900$457,000thousands by filing date
ALBEMARLE CORP012653101COM4,820$430,000thousands by filing date
DOMINOS PIZZA INC COM25754A201Stock930$396,000thousands by filing date
FORMA THERAPEUTICS HLDGS INC34633R104SHS7,250$361,000thousands by filing date
NUTANIX INC CL A67059N108Stock14,939$331,000thousands by filing date
AVIDITY BIOSCIENCES INC COM05370A108Stock9,200$259,000thousands by filing date
AGENUS INC00847G705COM NEW53,780$215,000thousands by filing date

Amendment chain

FilingRoleFiledAcceptedIngested
13F-HR 0001085146-20-002944this filing2020-11-13acceptance time not in the bulk data set